Tropical Storm Dorian Public Advisory Number 5

5 years 10 months ago
Issued at 1100 AM AST Sun Aug 25 2019 878 WTNT35 KNHC 251448 TCPAT5 BULLETIN Tropical Storm Dorian Advisory Number 5 NWS National Hurricane Center Miami FL AL052019 1100 AM AST Sun Aug 25 2019 ...NEW TROPICAL STORM WARNINGS AND WATCHES ISSUED AS DORIAN CONTINUES WESTWARD... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...11.2N 52.9W ABOUT 465 MI...750 KM ESE OF BARBADOS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Government of Barbados has issued a Tropical Storm Warning for Barbados and a Tropical Storm Watch for St. Vincent and the Grenadines. The Government of St. Lucia has issued a Tropical Storm Watch for St. Lucia. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Barbados A Tropical Storm Watch is in effect for... * St. Lucia * St. Vincent and the Grenadines A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Additional watches could be issued later today for portions of the Windward and Leeward Islands. Elsewhere, interests in Puerto Rico, the Virgin Islands, and Hispaniola should monitor the progress of Dorian. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Tropical Storm Dorian was located near latitude 11.2 North, longitude 52.9 West. Dorian is moving toward the west near 14 mph (22 km/h), and this motion should continue through tonight. A turn toward the west-northwest is expected on Monday, with this motion continuing through Tuesday night. On the forecast track, the center of Dorian is expected to be near the Windward Islands late Monday or early Tuesday and move into the eastern Caribbean Sea on Tuesday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Some strengthening is forecast during the next 48 hours, and Dorian could be near hurricane strength by Tuesday over the eastern Caribbean Sea. Tropical-storm-force winds extend outward up to 25 miles (35 km) from the center. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Dorian is expected to produce total rain accumulations of 2 to 4 inches in portions of the Lesser Antilles, with possible isolated maximum amounts of 6 inches. WIND: Tropical storm conditions are likely in the warning are by late Monday. Tropical storm conditions are possible within the watch area by Monday night or Tuesday. SURF: Swells generated by Dorian will be affecting portions of the Lesser Antilles by late Monday. These swells could cause life- threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Beven
NHC Webmaster

Atlantic Tropical Weather Outlook

5 years 10 months ago

000
ABNT20 KNHC 251142
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Sun Aug 25 2019

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Tropical
Storm Dorian, located several hundred miles east-southeast of
the Lesser Antilles.

Showers and thunderstorms remain disorganized in association with a
trough of low pressure that extends from the southern Florida
peninsula northeastward over the western Atlantic for a few hundred
miles. Environmental conditions appear conducive for gradual
development, and a tropical or subtropical depression is likely to
form within the next few days while the system moves slowly
northeastward well offshore of the southeastern United States.
Interests along the coasts of South and North Carolina should
continue to monitor the progress of this system. An Air Force
Reserve Hurricane Hunter aircraft is scheduled to investigate the
disturbance this afternoon, if necessary.
* Formation chance through 48 hours...medium...60 percent.
* Formation chance through 5 days...high...80 percent.

&&
Public Advisories on Dorian are issued under WMO header WTNT35 KNHC
and under AWIPS header MIATCPAT5. Forecast/Advisories on Dorian
are issued under WMO header WTNT25 KNHC and under AWIPS header
MIATCMAT5.

$$
Forecaster Beven

NHC Webmaster

Tropical Storm Dorian Public Advisory Number 4A

5 years 10 months ago
Issued at 800 AM AST Sun Aug 25 2019 000 WTNT35 KNHC 251131 TCPAT5 BULLETIN Tropical Storm Dorian Intermediate Advisory Number 4A NWS National Hurricane Center Miami FL AL052019 800 AM AST Sun Aug 25 2019 ...DORIAN CONTINUES WESTWARD OVER THE WESTERN TROPICAL ATLANTIC... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...11.1N 52.1W ABOUT 515 MI...830 KM ESE OF BARBADOS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Barbados A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Additional watches will likely be issued later today for portions of the Windward and Leeward Islands. Elsewhere, interests in Puerto Rico and Hispaniola should monitor the progress of Dorian. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM AST (1200 UTC), the center of Tropical Storm Dorian was located near latitude 11.1 North, longitude 52.1 West. Dorian is moving toward the west near 13 mph (20 km/h), and this motion should continue today, followed by a motion toward the west-northwest on Monday and Tuesday. On the forecast track, Dorian is expected to be near the central Lesser Antilles late Monday or early Tuesday. Maximum sustained winds remain near 40 mph (65 km/h) with higher gusts. Some strengthening is forecast during the next 48 hours, and Dorian could be near hurricane strength over the eastern Caribbean Sea. Tropical-storm-force winds extend outward up to 25 miles (35 km) from the center. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Dorian is expected to produce total rain accumulations of 2 to 4 inches in portions of the Lesser Antilles, with possible isolated maximum amounts of 6 inches. WIND: Tropical storm conditions are possible within the watch area by late Monday. SURF: Swells generated by Dorian will be affecting portions of the Lesser Antilles by late Monday. These swells could cause life- threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Beven
NHC Webmaster

Tropical Storm Dorian Forecast Discussion Number 4

5 years 10 months ago
Issued at 500 AM AST Sun Aug 25 2019 000 WTNT45 KNHC 250849 TCDAT5 Tropical Storm Dorian Discussion Number 4 NWS National Hurricane Center Miami FL AL052019 500 AM AST Sun Aug 25 2019 The convective organization of Dorian is about the same as it was several hour ago with the storm only producing small, generally short-lived thunderstorm areas. GOES-16 1-minute satellite images have been particularly helpful in locating the center in between bands of convection to the north and south of the cyclone. The initial wind speed is kept at 35 kt based on the most recent TAFB Dvorak fix. Dorian continues moving westward or 280/11 kt. A west to west-northwestward course of the tropical cyclone is expected during the next several days as a mid-level ridge remains in place over the southwestern Atlantic Ocean. There has been a noticeable change in the guidance tonight, with many models faster and to the southwest of earlier runs. This is not uncommon in the early stages of tropical Atlantic cyclones where the guidance has historically demonstrated a slow, poleward bias. Given the lack of interaction with even features at the subtropical latitudes, it makes sense to follow the trend of the latest guidance and shift the track about 30 n mi southwest during most of the forecast. Notably, the GFS and ECMWF models are still south of the new NHC prediction, and further adjustments could be required later today. The intensity forecast appears to be a battle between an increasingly conducive oceanic and shear environment during the next couple of days versus plentiful dry air in the mid-levels of the atmosphere. These mixed conditions primarily point toward slow strengthening during that time while Dorian approaches the Windward Islands, and no change has been made to the first part of the forecast. While Dorian still has a chance to become a hurricane over the eastern Caribbean, model guidance has been trending toward a higher-shear environment caused by a large upper low in a few days. Thus the intensity forecast is reduced from the previous one at long range, although it remains above most of the guidance. It should be stressed that Dorian is likely to be a difficult cyclone to forecast due to the marginal environment it is embedded within and its small size. Key Messages: 1. A Tropical Storm Watch has been issued for Barbados, and additional watches and warnings for the Windward and Leeward Islands will likely be required later today. 2. It is too soon to determine the specific timing or magnitude of impacts in Puerto Rico or Hispaniola, but interests in those areas should monitor the progress of Dorian. FORECAST POSITIONS AND MAX WINDS INIT 25/0900Z 11.0N 51.6W 35 KT 40 MPH 12H 25/1800Z 11.3N 53.3W 40 KT 45 MPH 24H 26/0600Z 11.8N 55.5W 45 KT 50 MPH 36H 26/1800Z 12.4N 57.7W 50 KT 60 MPH 48H 27/0600Z 13.2N 59.9W 55 KT 65 MPH 72H 28/0600Z 15.2N 63.9W 65 KT 75 MPH 96H 29/0600Z 17.1N 67.6W 60 KT 70 MPH 120H 30/0600Z 19.5N 71.0W 35 KT 40 MPH...INLAND $$ Forecaster Blake
NHC Webmaster

Tropical Storm Dorian Wind Speed Probabilities Number 4

5 years 10 months ago
Issued at 0900 UTC SUN AUG 25 2019 000 FONT15 KNHC 250845 PWSAT5 TROPICAL STORM DORIAN WIND SPEED PROBABILITIES NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052019 0900 UTC SUN AUG 25 2019 AT 0900Z THE CENTER OF TROPICAL STORM DORIAN WAS LOCATED NEAR LATITUDE 11.0 NORTH...LONGITUDE 51.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 06Z SUN AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 06Z SUN 18Z SUN 06Z MON 18Z MON 06Z TUE 06Z WED 06Z THU PERIODS TO TO TO TO TO TO TO 18Z SUN 06Z MON 18Z MON 06Z TUE 06Z WED 06Z THU 06Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT CURACAO 34 X X( X) X( X) X( X) X( X) 3( 3) X( 3) GREAT EXUMA 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) SAN SALVADOR 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) MAYAGUANA 34 X X( X) X( X) X( X) X( X) X( X) 10(10) GRAND TURK 34 X X( X) X( X) X( X) X( X) 3( 3) 18(21) GRAND TURK 50 X X( X) X( X) X( X) X( X) X( X) 5( 5) GUANTANAMO BAY 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) LES CAYES 34 X X( X) X( X) X( X) X( X) X( X) 7( 7) PORT-AU-PRINCE 34 X X( X) X( X) X( X) X( X) 3( 3) 19(22) PORT-AU-PRINCE 50 X X( X) X( X) X( X) X( X) X( X) 4( 4) PORT-AU-PRINCE 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) CAPE BEATA 34 X X( X) X( X) X( X) X( X) 3( 3) 15(18) CAPE BEATA 50 X X( X) X( X) X( X) X( X) 1( 1) 3( 4) PUERTO PLATA 34 X X( X) X( X) X( X) X( X) 6( 6) 25(31) PUERTO PLATA 50 X X( X) X( X) X( X) X( X) X( X) 8( 8) PUERTO PLATA 64 X X( X) X( X) X( X) X( X) X( X) 2( 2) SANTO DOMINGO 34 X X( X) X( X) X( X) X( X) 8( 8) 22(30) SANTO DOMINGO 50 X X( X) X( X) X( X) X( X) 2( 2) 6( 8) SANTO DOMINGO 64 X X( X) X( X) X( X) X( X) X( X) 2( 2) PONCE PR 34 X X( X) X( X) X( X) 2( 2) 20(22) 4(26) PONCE PR 50 X X( X) X( X) X( X) X( X) 4( 4) 1( 5) AGUADILLA PR 34 X X( X) X( X) X( X) 1( 1) 16(17) 6(23) AGUADILLA PR 50 X X( X) X( X) X( X) X( X) 3( 3) 1( 4) SAN JUAN PR 34 X X( X) X( X) X( X) 2( 2) 13(15) 2(17) SAN JUAN PR 50 X X( X) X( X) X( X) X( X) 3( 3) X( 3) VIEQUES PR 34 X X( X) X( X) X( X) 9( 9) 21(30) 2(32) VIEQUES PR 50 X X( X) X( X) X( X) 1( 1) 6( 7) 1( 8) VIEQUES PR 64 X X( X) X( X) X( X) X( X) 2( 2) X( 2) SAINT THOMAS 34 X X( X) X( X) X( X) 9( 9) 15(24) 2(26) SAINT THOMAS 50 X X( X) X( X) X( X) 1( 1) 4( 5) X( 5) SAINT THOMAS 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) SAINT CROIX 34 X X( X) X( X) X( X) 16(16) 17(33) 1(34) SAINT CROIX 50 X X( X) X( X) X( X) 2( 2) 7( 9) X( 9) SAINT CROIX 64 X X( X) X( X) X( X) X( X) 3( 3) X( 3) SAINT MAARTEN 34 X X( X) X( X) 1( 1) 12(13) 5(18) X(18) SABA 34 X X( X) X( X) 1( 1) 17(18) 6(24) X(24) SABA 50 X X( X) X( X) X( X) 2( 2) 2( 4) 1( 5) ST EUSTATIUS 34 X X( X) X( X) 1( 1) 18(19) 4(23) 1(24) ST EUSTATIUS 50 X X( X) X( X) X( X) 3( 3) 2( 5) X( 5) ST KITTS-NEVIS 34 X X( X) X( X) 1( 1) 18(19) 4(23) X(23) ST KITTS-NEVIS 50 X X( X) X( X) X( X) 4( 4) 1( 5) X( 5) BARBUDA 34 X X( X) X( X) 1( 1) 12(13) 2(15) X(15) ANTIGUA 34 X X( X) X( X) 2( 2) 16(18) 2(20) X(20) ANTIGUA 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) GUADELOUPE 34 X X( X) X( X) 3( 3) 23(26) 1(27) X(27) GUADELOUPE 50 X X( X) X( X) X( X) 5( 5) X( 5) X( 5) GUADELOUPE 64 X X( X) X( X) X( X) 1( 1) X( 1) X( 1) AVES 34 X X( X) X( X) 2( 2) 51(53) 9(62) X(62) AVES 50 X X( X) X( X) X( X) 21(21) 5(26) X(26) AVES 64 X X( X) X( X) X( X) 6( 6) 3( 9) X( 9) DOMINICA 34 X X( X) X( X) 6( 6) 40(46) 1(47) X(47) DOMINICA 50 X X( X) X( X) 1( 1) 13(14) X(14) X(14) DOMINICA 64 X X( X) X( X) X( X) 4( 4) X( 4) X( 4) MARTINIQUE 34 X X( X) 1( 1) 17(18) 38(56) 1(57) X(57) MARTINIQUE 50 X X( X) X( X) 3( 3) 19(22) 1(23) X(23) MARTINIQUE 64 X X( X) X( X) X( X) 5( 5) 1( 6) X( 6) SAINT LUCIA 34 X X( X) 2( 2) 26(28) 36(64) 1(65) X(65) SAINT LUCIA 50 X X( X) X( X) 6( 6) 21(27) X(27) X(27) SAINT LUCIA 64 X X( X) X( X) 1( 1) 7( 8) X( 8) X( 8) SAINT VINCENT 34 X X( X) 1( 1) 20(21) 27(48) 1(49) X(49) SAINT VINCENT 50 X X( X) X( X) 4( 4) 16(20) X(20) X(20) SAINT VINCENT 64 X X( X) X( X) 1( 1) 5( 6) X( 6) X( 6) BARBADOS 34 X X( X) 7( 7) 49(56) 7(63) X(63) X(63) BARBADOS 50 X X( X) X( X) 21(21) 3(24) X(24) X(24) BARBADOS 64 X X( X) X( X) 4( 4) 1( 5) X( 5) X( 5) GRENADA 34 X X( X) X( X) 4( 4) 11(15) X(15) X(15) GRENADA 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) TRINIDADTOBAGO 34 X X( X) 1( 1) 3( 4) 4( 8) X( 8) X( 8) JUANGRIEGO 34 X X( X) X( X) 1( 1) 3( 4) 1( 5) X( 5) $$ FORECASTER BLAKE
NHC Webmaster

Tropical Storm Dorian Public Advisory Number 4

5 years 10 months ago
Issued at 500 AM AST Sun Aug 25 2019 000 WTNT35 KNHC 250844 TCPAT5 BULLETIN Tropical Storm Dorian Advisory Number 4 NWS National Hurricane Center Miami FL AL052019 500 AM AST Sun Aug 25 2019 ...TROPICAL STORM WATCH ISSUED FOR BARBADOS... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...11.0N 51.6W ABOUT 555 MI...890 KM ESE OF BARBADOS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Barbados has issued a Tropical Storm Watch for Barbados. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Watch is in effect for... * Barbados A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. Additional watches will likely be issued later today for portions of the Windward and Leeward Islands. Elsewhere, interests in Puerto Rico and Hispaniola should monitor the progress of Dorian. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Tropical Storm Dorian was located near latitude 11.0 North, longitude 51.6 West. Dorian is moving toward the west near 13 mph (20 km/h), and this motion is expected to continue today, followed by a motion toward the west-northwest on Monday and Tuesday. On the forecast track, Dorian is expected to be near the central Lesser Antilles late Monday or early Tuesday. Maximum sustained winds remain near 40 mph (65 km/h) with higher gusts. Some strengthening is forecast during the next 48 hours, and Dorian could be near hurricane strength over the eastern Caribbean Sea. Tropical-storm-force winds extend outward up to 25 miles (35 km) from the center. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: Dorian is expected to produce total rain accumulations of 2 to 4 inches in portions of the Lesser Antilles, with possible isolated maximum amounts of 6 inches. WIND: Tropical storm conditions are possible within the watch area by late Monday. SURF: Swells generated by Dorian will be affecting portions of the Lesser Antilles by late Monday. These swells could cause life- threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Blake
NHC Webmaster

Tropical Storm Dorian Forecast Advisory Number 4

5 years 10 months ago
Issued at 0900 UTC SUN AUG 25 2019 678 WTNT25 KNHC 250843 TCMAT5 TROPICAL STORM DORIAN FORECAST/ADVISORY NUMBER 4 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052019 0900 UTC SUN AUG 25 2019 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE GOVERNMENT OF BARBADOS HAS ISSUED A TROPICAL STORM WATCH FOR BARBADOS. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * BARBADOS A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. ADDITIONAL WATCHES WILL LIKELY BE ISSUED LATER TODAY FOR PORTIONS OF THE WINDWARD AND LEEWARD ISLANDS. ELSEWHERE...INTERESTS IN PUERTO RICO AND HISPANIOLA SHOULD MONITOR THE PROGRESS OF DORIAN. TROPICAL STORM CENTER LOCATED NEAR 11.0N 51.6W AT 25/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 11 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 20NE 0SE 0SW 20NW. 12 FT SEAS.. 30NE 0SE 0SW 30NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 11.0N 51.6W AT 25/0900Z AT 25/0600Z CENTER WAS LOCATED NEAR 10.9N 51.0W FORECAST VALID 25/1800Z 11.3N 53.3W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 30NE 0SE 0SW 30NW. FORECAST VALID 26/0600Z 11.8N 55.5W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 30NE 30SE 0SW 30NW. FORECAST VALID 26/1800Z 12.4N 57.7W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 30SE 20SW 40NW. FORECAST VALID 27/0600Z 13.2N 59.9W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 40SE 20SW 40NW. FORECAST VALID 28/0600Z 15.2N 63.9W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 30NE 20SE 10SW 30NW. 34 KT... 50NE 40SE 30SW 50NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 29/0600Z 17.1N 67.6W MAX WIND 60 KT...GUSTS 75 KT. OUTLOOK VALID 30/0600Z 19.5N 71.0W...INLAND MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 11.0N 51.6W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPAT5...AT 25/1200Z NEXT ADVISORY AT 25/1500Z $$ FORECASTER BLAKE
NHC Webmaster

Atlantic Tropical Weather Outlook

5 years 10 months ago

000
ABNT20 KNHC 250542
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 AM EDT Sun Aug 25 2019

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Tropical
Storm Dorian, located several hundred miles east-southeast of
the Lesser Antilles.

Showers and thunderstorms remain disorganized in association with a
trough of low pressure that extends from south-central Florida
northeastward over the western Atlantic for a few hundred
miles. Environmental conditions appear conducive for gradual
development, and a tropical or subtropical depression is likely to
form within the next few days while the system moves northeastward
offshore of the southeastern United States. Interests along the
coasts of South and North Carolina should continue to monitor the
progress of this system. An Air Force Reserve Hurricane Hunter
aircraft is scheduled to investigate the disturbance later today, if
necessary.
* Formation chance through 48 hours...medium...60 percent.
* Formation chance through 5 days...high...80 percent.

&&
Public Advisories on Dorian are issued under WMO header WTNT35 KNHC
and under AWIPS header MIATCPAT5. Forecast/Advisories on Dorian
are issued under WMO header WTNT25 KNHC and under AWIPS header
MIATCMAT5.

$$
Forecaster Cangialosi
NHC Webmaster

Tropical Storm Dorian Forecast Discussion Number 3

5 years 10 months ago
Issued at 1100 PM AST Sat Aug 24 2019 000 WTNT45 KNHC 250248 TCDAT5 Tropical Storm Dorian Discussion Number 3 NWS National Hurricane Center Miami FL AL052019 1100 PM AST Sat Aug 24 2019 Dorian's structure hasn't changed substantially since the last advisory. Although southeasterly shear and surrounding dry air appear to be limiting convection, the most recent available microwave imagery showed that the small cyclone is maintaining well-defined convective banding. The initial intensity is still 35 kt, based primarily on the most recent TAFB Dvorak fix. Confidence in the intensity forecast is particularly low due to a number of factors. The small size of Dorian could make it susceptible to large short-term swings in intensity (up or down). While SHIPS diagnostics suggest that the wind shear will be below 10 kt for at least the next 72 h, UW-CIMSS shear diagnostics indicate that the current shear is higher, more like 15-20 kt. And the intensity guidance spread is also notably large, further decreasing confidence in the forecast. For now, the NHC intensity forecast has not been significantly changed, and shows Dorian near hurricane strength when it approaches the Lesser Antilles in a few days. This is a little above the intensity consensus and it should be stressed that it is still too soon to pinpoint potential wind impacts across those islands, given the large uncertainty in the forecast. The official forecast then shows Dorian maintaining hurricane strength across the northeast Caribbean, but it is certainly possible that it could be weaker, especially given the expected surrounding dry environment and a possible increase in wind shear forecast by the GFS and ECMWF models. By the end of the forecast period, the NHC intensity forecast is very close to HCCA and IVCN. An ASCAT-B overpass at 0024 UTC revealed that Dorian is moving slightly faster than previously estimated, now 280/12 kt. Unlike the intensity guidance, the track models are in quite good agreement on the track of Dorian. The tropical storm should continue moving westward to west-northwestward at a similar forward speed, steered primarily by a mid-level ridge stretching across most of the central Atlantic. The NHC forecast is nearly on top of the previous advisory and remains very near the TVCN and HCCA consensus aids. Key Messages: 1. Dorian is forecast to strengthen and could be near hurricane strength when it approaches the Lesser Antilles on Tuesday. 2. It is too soon to determine the specific timing or magnitude of impacts in the Lesser Antilles, but tropical storm or hurricane watches will likely be needed for a portion of the islands on Sunday. FORECAST POSITIONS AND MAX WINDS INIT 25/0300Z 10.9N 50.4W 35 KT 40 MPH 12H 25/1200Z 11.2N 52.0W 40 KT 45 MPH 24H 26/0000Z 11.7N 54.1W 45 KT 50 MPH 36H 26/1200Z 12.5N 56.2W 50 KT 60 MPH 48H 27/0000Z 13.2N 58.2W 55 KT 65 MPH 72H 28/0000Z 15.0N 62.3W 65 KT 75 MPH 96H 29/0000Z 17.0N 66.5W 70 KT 80 MPH 120H 30/0000Z 19.0N 70.0W 55 KT 65 MPH...INLAND $$ Forecaster Zelinsky
NHC Webmaster

Tropical Storm Dorian Wind Speed Probabilities Number 3

5 years 10 months ago
Issued at 0300 UTC SUN AUG 25 2019 000 FONT15 KNHC 250247 PWSAT5 TROPICAL STORM DORIAN WIND SPEED PROBABILITIES NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052019 0300 UTC SUN AUG 25 2019 AT 0300Z THE CENTER OF TROPICAL STORM DORIAN WAS LOCATED NEAR LATITUDE 10.9 NORTH...LONGITUDE 50.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 35 KTS...40 MPH...65 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 00Z SUN AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 00Z SUN 12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU PERIODS TO TO TO TO TO TO TO 12Z SUN 00Z MON 12Z MON 00Z TUE 00Z WED 00Z THU 00Z FRI FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT CURACAO 34 X X( X) X( X) X( X) X( X) 2( 2) 1( 3) MAYAGUANA 34 X X( X) X( X) X( X) X( X) X( X) 9( 9) GRAND TURK 34 X X( X) X( X) X( X) X( X) 1( 1) 19(20) GRAND TURK 50 X X( X) X( X) X( X) X( X) X( X) 5( 5) GRAND TURK 64 X X( X) X( X) X( X) X( X) X( X) 2( 2) GUANTANAMO BAY 34 X X( X) X( X) X( X) X( X) X( X) 3( 3) LES CAYES 34 X X( X) X( X) X( X) X( X) X( X) 6( 6) PORT-AU-PRINCE 34 X X( X) X( X) X( X) X( X) 2( 2) 18(20) PORT-AU-PRINCE 50 X X( X) X( X) X( X) X( X) X( X) 5( 5) PORT-AU-PRINCE 64 X X( X) X( X) X( X) X( X) X( X) 1( 1) CAPE BEATA 34 X X( X) X( X) X( X) X( X) 2( 2) 17(19) CAPE BEATA 50 X X( X) X( X) X( X) X( X) X( X) 5( 5) PUERTO PLATA 34 X X( X) X( X) X( X) X( X) 4( 4) 30(34) PUERTO PLATA 50 X X( X) X( X) X( X) X( X) X( X) 11(11) PUERTO PLATA 64 X X( X) X( X) X( X) X( X) X( X) 3( 3) SANTO DOMINGO 34 X X( X) X( X) X( X) X( X) 6( 6) 29(35) SANTO DOMINGO 50 X X( X) X( X) X( X) X( X) 1( 1) 12(13) SANTO DOMINGO 64 X X( X) X( X) X( X) X( X) X( X) 4( 4) PONCE PR 34 X X( X) X( X) X( X) 1( 1) 24(25) 13(38) PONCE PR 50 X X( X) X( X) X( X) X( X) 7( 7) 5(12) PONCE PR 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) AGUADILLA PR 34 X X( X) X( X) X( X) 1( 1) 19(20) 15(35) AGUADILLA PR 50 X X( X) X( X) X( X) X( X) 4( 4) 5( 9) AGUADILLA PR 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) SAN JUAN PR 34 X X( X) X( X) X( X) 1( 1) 18(19) 9(28) SAN JUAN PR 50 X X( X) X( X) X( X) X( X) 6( 6) 3( 9) SAN JUAN PR 64 X X( X) X( X) X( X) X( X) 1( 1) 1( 2) VIEQUES PR 34 X X( X) X( X) X( X) 3( 3) 36(39) 6(45) VIEQUES PR 50 X X( X) X( X) X( X) 1( 1) 11(12) 4(16) VIEQUES PR 64 X X( X) X( X) X( X) X( X) 4( 4) 1( 5) SAINT THOMAS 34 X X( X) X( X) X( X) 4( 4) 29(33) 5(38) SAINT THOMAS 50 X X( X) X( X) X( X) 1( 1) 8( 9) 1(10) SAINT THOMAS 64 X X( X) X( X) X( X) X( X) 3( 3) X( 3) SAINT CROIX 34 X X( X) X( X) X( X) 6( 6) 37(43) 4(47) SAINT CROIX 50 X X( X) X( X) X( X) 1( 1) 13(14) 2(16) SAINT CROIX 64 X X( X) X( X) X( X) X( X) 5( 5) 1( 6) SAINT MAARTEN 34 X X( X) X( X) X( X) 11(11) 16(27) 2(29) SAINT MAARTEN 50 X X( X) X( X) X( X) 1( 1) 5( 6) X( 6) SAINT MAARTEN 64 X X( X) X( X) X( X) X( X) 2( 2) X( 2) SABA 34 X X( X) X( X) X( X) 15(15) 20(35) 1(36) SABA 50 X X( X) X( X) X( X) 2( 2) 9(11) X(11) SABA 64 X X( X) X( X) X( X) 1( 1) 3( 4) X( 4) ST EUSTATIUS 34 X X( X) X( X) X( X) 17(17) 18(35) 1(36) ST EUSTATIUS 50 X X( X) X( X) X( X) 3( 3) 8(11) X(11) ST EUSTATIUS 64 X X( X) X( X) X( X) 1( 1) 3( 4) X( 4) ST KITTS-NEVIS 34 X X( X) X( X) X( X) 20(20) 16(36) 1(37) ST KITTS-NEVIS 50 X X( X) X( X) X( X) 4( 4) 7(11) X(11) ST KITTS-NEVIS 64 X X( X) X( X) X( X) 1( 1) 3( 4) X( 4) BARBUDA 34 X X( X) X( X) 1( 1) 16(17) 8(25) X(25) BARBUDA 50 X X( X) X( X) X( X) 3( 3) 3( 6) X( 6) BARBUDA 64 X X( X) X( X) X( X) X( X) 1( 1) X( 1) ANTIGUA 34 X X( X) X( X) 1( 1) 22(23) 10(33) X(33) ANTIGUA 50 X X( X) X( X) X( X) 5( 5) 4( 9) X( 9) ANTIGUA 64 X X( X) X( X) X( X) 1( 1) 1( 2) X( 2) GUADELOUPE 34 X X( X) X( X) 2( 2) 35(37) 7(44) X(44) GUADELOUPE 50 X X( X) X( X) X( X) 11(11) 3(14) X(14) GUADELOUPE 64 X X( X) X( X) X( X) 2( 2) 2( 4) X( 4) AVES 34 X X( X) X( X) X( X) 29(29) 33(62) 2(64) AVES 50 X X( X) X( X) X( X) 8( 8) 19(27) X(27) AVES 64 X X( X) X( X) X( X) 2( 2) 8(10) X(10) DOMINICA 34 X X( X) X( X) 3( 3) 48(51) 6(57) X(57) DOMINICA 50 X X( X) X( X) X( X) 21(21) 4(25) X(25) DOMINICA 64 X X( X) X( X) X( X) 6( 6) 1( 7) X( 7) MARTINIQUE 34 X X( X) X( X) 4( 4) 52(56) 3(59) X(59) MARTINIQUE 50 X X( X) X( X) X( X) 25(25) 2(27) X(27) MARTINIQUE 64 X X( X) X( X) X( X) 8( 8) X( 8) X( 8) SAINT LUCIA 34 X X( X) X( X) 4( 4) 46(50) 2(52) X(52) SAINT LUCIA 50 X X( X) X( X) X( X) 21(21) 1(22) X(22) SAINT LUCIA 64 X X( X) X( X) X( X) 6( 6) X( 6) X( 6) SAINT VINCENT 34 X X( X) X( X) 2( 2) 33(35) 2(37) X(37) SAINT VINCENT 50 X X( X) X( X) X( X) 13(13) X(13) X(13) SAINT VINCENT 64 X X( X) X( X) X( X) 5( 5) X( 5) X( 5) BARBADOS 34 X X( X) 1( 1) 19(20) 28(48) X(48) X(48) BARBADOS 50 X X( X) X( X) 4( 4) 13(17) X(17) X(17) BARBADOS 64 X X( X) X( X) 1( 1) 4( 5) X( 5) X( 5) GRENADA 34 X X( X) X( X) 1( 1) 11(12) 1(13) X(13) GRENADA 50 X X( X) X( X) X( X) 3( 3) X( 3) X( 3) TRINIDADTOBAGO 34 X X( X) X( X) 1( 1) 6( 7) 1( 8) X( 8) JUANGRIEGO 34 X X( X) X( X) X( X) 3( 3) 1( 4) X( 4) $$ FORECASTER ZELINSKY
NHC Webmaster

Tropical Storm Dorian Public Advisory Number 3

5 years 10 months ago
Issued at 1100 PM AST Sat Aug 24 2019 000 WTNT35 KNHC 250247 TCPAT5 BULLETIN Tropical Storm Dorian Advisory Number 3 NWS National Hurricane Center Miami FL AL052019 1100 PM AST Sat Aug 24 2019 ...DORIAN MOVING STEADILY WESTWARD... ...WATCHES WILL LIKELY BE NECESSARY FOR PORTIONS OF THE LESSER ANTILLES ON SUNDAY... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...10.9N 50.4W ABOUT 635 MI...1020 KM ESE OF BARBADOS MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...W OR 280 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests in the central and northern Lesser Antilles should monitor the progress of Dorian. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Tropical Storm Dorian was located near latitude 10.9 North, longitude 50.4 West. Dorian is moving toward the west near 14 mph (22 km/h). The tropical storm is forecast to move generally west-northwestward at a similar forward speed for the next several days. On the forecast track, Dorian is expected to be near the central Lesser Antilles on Tuesday. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Gradual strengthening is forecast during the next few days, and Dorian could be near hurricane strength when it approaches the central Lesser Antilles on Tuesday. Tropical-storm-force winds extend outward up to 25 miles (35 km) from the center. The estimated minimum central pressure is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Zelinsky
NHC Webmaster

Tropical Storm Dorian Forecast Advisory Number 3

5 years 10 months ago
Issued at 0300 UTC SUN AUG 25 2019 000 WTNT25 KNHC 250246 TCMAT5 TROPICAL STORM DORIAN FORECAST/ADVISORY NUMBER 3 NWS NATIONAL HURRICANE CENTER MIAMI FL AL052019 0300 UTC SUN AUG 25 2019 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. INTERESTS IN THE CENTRAL AND NORTHERN LESSER ANTILLES SHOULD MONITOR THE PROGRESS OF DORIAN. TROPICAL STORM CENTER LOCATED NEAR 10.9N 50.4W AT 25/0300Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST OR 280 DEGREES AT 12 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 20NE 0SE 0SW 20NW. 12 FT SEAS.. 30NE 0SE 0SW 30NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 10.9N 50.4W AT 25/0300Z AT 25/0000Z CENTER WAS LOCATED NEAR 10.8N 49.9W FORECAST VALID 25/1200Z 11.2N 52.0W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 30NE 0SE 0SW 30NW. FORECAST VALID 26/0000Z 11.7N 54.1W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 30NE 30SE 0SW 30NW. FORECAST VALID 26/1200Z 12.5N 56.2W MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 30SE 20SW 40NW. FORECAST VALID 27/0000Z 13.2N 58.2W MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 20NE 0SE 0SW 20NW. 34 KT... 40NE 40SE 20SW 40NW. FORECAST VALID 28/0000Z 15.0N 62.3W MAX WIND 65 KT...GUSTS 80 KT. 50 KT... 30NE 20SE 10SW 30NW. 34 KT... 50NE 40SE 30SW 50NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 29/0000Z 17.0N 66.5W MAX WIND 70 KT...GUSTS 85 KT. OUTLOOK VALID 30/0000Z 19.0N 70.0W...INLAND MAX WIND 55 KT...GUSTS 65 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 10.9N 50.4W NEXT ADVISORY AT 25/0900Z $$ FORECASTER ZELINSKY
NHC Webmaster

Atlantic Tropical Weather Outlook

5 years 10 months ago

000
ABNT20 KNHC 242313
TWOAT

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Sat Aug 24 2019

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Tropical
Storm Dorian, located several hundred miles east-southeast of
the Lesser Antilles.

A trough of low pressure extending from the coast of south-central
Florida northeastward over the western Atlantic for a few hundred
miles continues to produce a large area of disorganized showers and
thunderstorms. Environmental conditions appear conducive for
gradual development during the next few days, and a tropical or
subtropical depression is likely to form early next week while the
system moves northeastward over the Atlantic, offshore of the
southeastern United States coast. Interests along the coasts of
South and North Carolina should continue to monitor the progress
of this system. An Air Force Reserve Hurricane Hunter aircraft is
scheduled to investigate the system on Sunday, if necessary.
* Formation chance through 48 hours...high...70 percent.
* Formation chance through 5 days...high...90 percent.

Satellite and surface observations show that the trough of low
pressure over the far northwestern Gulf of Mexico has moved inland
over the Upper Texas coast and western Louisiana. Although further
development of this system is not expected, it will likely bring
locally heavy rains to portions of Louisiana and eastern Texas
during the next day or two. See products issued by your local
National Weather Service office for additional information.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...near 0 percent.

&&
Public Advisories on Dorian are issued under WMO header WTNT35 KNHC
and under AWIPS header MIATCPAT5. Forecast/Advisories on Dorian
are issued under WMO header WTNT25 KNHC and under AWIPS header
MIATCMAT5.

$$
Forecaster Brown
NHC Webmaster
Checked
5 years 9 months ago
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