National Hurricane Center (NHC) Pacific Map

Issued at 900 PM CST Mon Sep 23 2024 000 WTPZ35 KNHC 240232 TCPEP5 BULLETIN Hurricane John Advisory Number 7 NWS National Hurricane Center Miami FL EP102024 900 PM CST Mon Sep 23 2024 ...MAJOR HURRICANE JOHN VERY NEAR THE COAST... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE ONGOING... SUMMARY OF 900 PM CST...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...16.3N 98.8W ABOUT 15 MI...20 KM W OF PUNTA MALDONADO MEXICO ABOUT 120 MI...190 KM WNW OF PUERTO ESCONDIDO MEXICO MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...N OR 350 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...959 MB...28.32 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * East of Acapulco to Bahias de Huatulco A Tropical Storm Warning is in effect for... * East of Bahias de Huatulco to Salina Cruz A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next couple of hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next couple hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 900 PM CST (0300 UTC), the center of Hurricane John was located near latitude 16.3 North, longitude 98.8 West. John is moving toward the north near 8 mph (13 km/h). On the forecast track, the center of John is forecast to move inland along the coast of southern Mexico in the next couple of hours. John will continue to move inland over southern Mexico on Tuesday. Maximum sustained winds have increased to near 120 mph (195 km/h) with higher gusts. John is now a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some additional strengthening is possible the next couple of hours before John makes landfall. After landfall, the system will rapidly weaken over the high terrain of southern Mexico. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 45 miles (75 km). The estimated minimum central pressure is 959 mb (28.32 inches). HAZARDS AFFECTING LAND ---------------------- Key Messages for John can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP5 and WMO header WTPZ45 KNHC and on the web at hurricanes.gov/text/MIATCDEP5.shtml RAINFALL: Through Thursday, Hurricane John is expected to produce 6 to 12 inches of rain with isolated totals around 15 inches across the coastal areas of Chiapas. In areas along and near the Oaxaca coast to southeast Guerrero, between 10 and 20 inches of rain with isolated totals near 30 inches can be expected through Thursday. For a complete depiction of forecast rainfall associated with Hurricane John, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep5.shtml?rainqpf STORM SURGE: A life-threatening storm surge is expected to produce significant coastal flooding near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Hurricane conditions are ongoing within portions of the hurricane warning area. Tropical-storm-force winds are already occuring within the warning area. Wind speeds atop and on the windward sides of hills and mountains are often up to 30 percent stronger than the near-surface winds indicated in this advisory, and in some elevated locations could be even greater. SURF: Swells associated with John are forecast to continue affecting the coast of southern Mexico during the next couple of days, with the potential for dangerous surf and rip currents much of the week. Please see local statements for more information. NEXT ADVISORY ------------- Next intermediate advisory at 1200 AM CST. Next complete advisory at 300 AM CST. $$ Forecaster Kelly

...MAJOR HURRICANE JOHN VERY NEAR THE COAST... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE ONGOING... As of 9:00 PM CST Mon Sep 23 the center of John was located near 16.3, -98.8 with movement N at 8 mph. The minimum central pressure was 959 mb with maximum sustained winds of about 120 mph.

Issued at 0300 UTC TUE SEP 24 2024 000 WTPZ25 KNHC 240231 TCMEP5 HURRICANE JOHN FORECAST/ADVISORY NUMBER 7 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 0300 UTC TUE SEP 24 2024 HURRICANE CENTER LOCATED NEAR 16.3N 98.8W AT 24/0300Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH OR 350 DEGREES AT 7 KT ESTIMATED MINIMUM CENTRAL PRESSURE 959 MB EYE DIAMETER 5 NM MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 120 KT. 64 KT....... 10NE 10SE 0SW 10NW. 50 KT....... 20NE 20SE 15SW 20NW. 34 KT....... 40NE 40SE 30SW 40NW. 12 FT SEAS.. 10NE 90SE 60SW 10NW. 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 16.3N 98.8W AT 24/0300Z AT 24/0000Z CENTER WAS LOCATED NEAR 15.9N 98.6W FORECAST VALID 24/1200Z 17.0N 98.9W...INLAND MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 0NE 10SE 10SW 10NW. 34 KT... 20NE 40SE 50SW 30NW. FORECAST VALID 25/0000Z 17.5N 99.1W...POST-TROP/INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 25/1200Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.3N 98.8W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPEP5...AT 24/0600Z NEXT ADVISORY AT 24/0900Z $$ FORECASTER KELLY

5-Day Uncertainty Track last updated Mon, 23 Sep 2024 23:49:12 GMT


Wind Speed Probabilities last updated Mon, 23 Sep 2024 21:28:56 GMT

...EYEWALL OF JOHN VERY NEAR THE COAST... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE IMMINENT... As of 6:00 PM CST Mon Sep 23 the center of John was located near 15.9, -98.6 with movement N at 8 mph. The minimum central pressure was 970 mb with maximum sustained winds of about 105 mph.

Issued at 600 PM CST Mon Sep 23 2024 000 WTPZ35 KNHC 232348 TCPEP5 BULLETIN Hurricane John Intermediate Advisory Number 6A NWS National Hurricane Center Miami FL EP102024 600 PM CST Mon Sep 23 2024 ...EYEWALL OF JOHN VERY NEAR THE COAST... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE IMMINENT... SUMMARY OF 600 PM CST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...15.9N 98.6W ABOUT 30 MI...45 KM S OF PUNTA MALDONADO MEXICO ABOUT 100 MI...160 KM W OF PUERTO ESCONDIDO MEXICO MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...N OR 350 DEGREES AT 8 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...970 MB...28.64 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * East of Acapulco to Bahias de Huatulco A Tropical Storm Warning is in effect for... * East of Bahias de Huatulco to Salina Cruz A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next few hours. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next few hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 600 PM CST (0000 UTC), the center of Hurricane John was located near latitude 15.9 North, longitude 98.6 West. John is moving toward the north near 8 mph (15 km/h). A slow motion to the north or north-northwest is expected during the next 24 hours. On the forecast track, the center of John is forecast to move inland along the coast of southern Mexico late tonight or early Tuesday. Maximum sustained winds have increased to near 105 mph (165 km/h) with higher gusts. John is a category 2 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is possible over the next few hours and John could become a major hurricane before making landfall along the coast of southern Mexico. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 45 miles (75 km). The estimated minimum central pressure is 970 mb (28.64 inches). HAZARDS AFFECTING LAND ---------------------- Key Messages for John can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP5 and WMO header WTPZ45 KNHC and on the web at hurricanes.gov/text/MIATCDEP5.shtml RAINFALL: Through Thursday, John is expected to produce 6 to 12 inches of rain with isolated totals around 15 inches across the coastal areas of Chiapas. In areas along and near the Oaxaca coast to southeast Guerrero, between 10 and 20 inches of rain with isolated totals near 30 inches can be expected through Thursday. This heavy rainfall will likely cause significant and possibly catastrophic, life-threatening flash flooding and mudslides to the Mexican States of Chiapas, Oaxaca, and southeast Guerrero, particularly in areas near the coast. For a complete depiction of forecast rainfall associated with Hurricane John, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep5.shtml?rainqpf STORM SURGE: A life-threatening storm surge is expected to produce significant coastal flooding near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Hurricane conditions are imminent within portions of the hurricane warning area. Tropical-storm-force winds are already occuring within the warning area. SURF: Swells associated with John are forecast to continue affecting the coast of southern Mexico during the next couple of days, with the potential for dangerous surf and rip currents much of the week. Please see local statements for more information. NEXT ADVISORY ------------- Next complete advisory at 900 PM CST. $$ Forecaster Kelly

600
ABPZ20 KNHC 232303
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 PM PDT Mon Sep 23 2024

For the eastern North Pacific...east of 140 degrees west longitude:

Active Systems:
The National Hurricane Center is issuing advisories on Hurricane
John, located near the coast of southern Mexico.

East-Central Portion of the East Pacific:
A trough of low pressure located several hundred miles southwest of
southwestern Mexico is producing disorganized showers and
thunderstorms. Development of this system is no longer expected as
it moves eastward towards the coast of southern Mexico the next few
days.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 7 days...low...near 0 percent.

$$
Forecaster Kelly

5-Day Uncertainty Track last updated Mon, 23 Sep 2024 20:50:07 GMT


Wind Speed Probabilities last updated Mon, 23 Sep 2024 21:28:56 GMT

Issued at 300 PM CST Mon Sep 23 2024 000 WTPZ45 KNHC 232049 TCDEP5 Hurricane John Discussion Number 6 NWS National Hurricane Center Miami FL EP102024 300 PM CST Mon Sep 23 2024 John continues to rapidly strengthen. The latest subjective Dvorak intensity estimates range from 65 to 77 kt, while the latest objective intensity estimates are a little higher, in the 79 to 90 kt range. On infrared satellite imagery, the area of cold cloud tops continues to grow, and the inner core is becoming more symmetric. The latest visible images have shown hints of a small eye, that has become a little more apparent in the last few hours. Based on the above data and recent satellite trends, the initial intensity is increased to 85 kt, making John a category 2 hurricane. Environmental parameters continue to be ripe for additional rapid intensification, with very warm ocean temperatures, weak vertical wind shear and a moist atmosphere. The only potential limiting factor could be how John might interact with the mountainous topography of Mexico as the hurricane approaches the coastline. The DSHIPS and LGEM statistical intensity models remain at the higher end of the guidance envelope and show John becoming a major hurricane as it approaches the coast. The EC SHIPS Rapid Intensity Index is depicting a high likelihood of continued rapid intensification over next 12 hours. The latest NHC forecast is near the high end of the intensity guidance and continues to show John strengthening to a 105-kt hurricane. It is possible that John could peak even higher than shown below between the 12 h forecast point and when it reaches the coast. John continues to move due northward, now at 5 kt. The current motion and the latest model guidance has again necessitated a westward track shift to the NHC forecast. Given the updated track forecast, the government of Mexico has extended the hurricane warning westward. KEY MESSAGES: 1. John is expected to continue rapidly intensifying, and is forecast to become a major hurricane before the center reaches the coast of southern Mexico within the Hurricane Warning area tonight or early Tuesday. Damaging hurricane-force winds and a life-threatening storm surge are expected within portions of the hurricane warning area. 2. John will bring very heavy rainfall to coastal portions of southern Mexico through this week. This heavy rainfall will likely cause significant and possibly catastrophic, life-threatening flash flooding and mudslides to the Mexican States of Chiapas, Oaxaca, and southeast Guerrero, particularly in areas near the coast. FORECAST POSITIONS AND MAX WINDS INIT 23/2100Z 15.5N 98.5W 85 KT 100 MPH 12H 24/0600Z 16.0N 98.3W 105 KT 120 MPH 24H 24/1800Z 16.5N 98.3W 65 KT 75 MPH...INLAND 36H 25/0600Z 16.7N 98.4W 30 KT 35 MPH...POST-TROP/INLAND 48H 25/1800Z...DISSIPATED $$ Forecaster Hagen

Issued at 2100 UTC MON SEP 23 2024 000 FOPZ15 KNHC 232048 PWSEP5 HURRICANE JOHN WIND SPEED PROBABILITIES NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 2100 UTC MON SEP 23 2024 AT 2100Z THE CENTER OF HURRICANE JOHN WAS LOCATED NEAR LATITUDE 15.5 NORTH...LONGITUDE 98.5 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 85 KTS ...100 MPH...155 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 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 18Z MON 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 18Z MON 06Z TUE 18Z TUE 06Z WED 18Z WED 18Z THU 18Z FRI PERIODS TO TO TO TO TO TO TO 06Z TUE 18Z TUE 06Z WED 18Z WED 18Z THU 18Z FRI 18Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT ZIHUATANEJO 34 X 2( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) 15N 100W 34 1 3( 4) 5( 9) X( 9) X( 9) X( 9) X( 9) ACAPULCO 34 2 11(13) 4(17) X(17) X(17) X(17) X(17) ACAPULCO 50 X 2( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) ACAPULCO 64 X X( X) 1( 1) X( 1) X( 1) X( 1) X( 1) P MALDONADO 34 88 5(93) X(93) X(93) X(93) X(93) X(93) P MALDONADO 50 49 18(67) 1(68) X(68) X(68) X(68) X(68) P MALDONADO 64 16 19(35) 3(38) X(38) X(38) X(38) X(38) P ANGEL 34 1 6( 7) 4(11) X(11) X(11) X(11) X(11) HUATULCO 34 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) 15N 95W 34 X 2( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) $$ FORECASTER HAGEN

Issued at 300 PM CST Mon Sep 23 2024 000 WTPZ35 KNHC 232048 TCPEP5 BULLETIN Hurricane John Advisory Number 6 NWS National Hurricane Center Miami FL EP102024 300 PM CST Mon Sep 23 2024 ...JOHN RAPIDLY STRENGTHENS TO A CATEGORY 2 HURRICANE... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE EXPECTED IN PORTIONS OF SOUTHERN MEXICO... SUMMARY OF 300 PM CST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...15.5N 98.5W ABOUT 55 MI...90 KM S OF PUNTA MALDONADO MEXICO ABOUT 95 MI...155 KM WSW OF PUERTO ESCONDIDO MEXICO MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...N OR 0 DEGREES AT 6 MPH...9 KM/H MINIMUM CENTRAL PRESSURE...973 MB...28.74 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has issued a Hurricane Warning from west of Punta Maldonado to east of Acapulco. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * East of Acapulco to Bahias de Huatulco A Tropical Storm Warning is in effect for... * East of Bahias de Huatulco to Salina Cruz A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 12 to 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 to 24 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 300 PM CST (2100 UTC), the center of Hurricane John was located near latitude 15.5 North, longitude 98.5 West. John is moving toward the north near 6 mph (9 km/h). A slow motion to the north or north-northeast is expected during the next 24 hours. On the forecast track, the center of John is forecast to move inland along the coast of southern Mexico tonight or early Tuesday. Maximum sustained winds have increased to near 100 mph (155 km/h) with higher gusts. John is a category 2 hurricane on the Saffir-Simpson Hurricane Wind Scale. Rapid strengthening is forecast to continue, and John is expected to become a major hurricane as it approaches the coast of southern Mexico. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 45 miles (75 km). The estimated minimum central pressure is 973 mb (28.74 inches). HAZARDS AFFECTING LAND ---------------------- Key Messages for John can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP5 and WMO header WTPZ45 KNHC and on the web at hurricanes.gov/text/MIATCDEP5.shtml RAINFALL: Through Thursday, John is expected to produce 6 to 12 inches of rain with isolated totals around 15 inches across the coastal areas of Chiapas. In areas along and near the Oaxaca coast to southeast Guerrero, between 10 and 20 inches of rain with isolated totals near 30 inches can be expected through Thursday. This heavy rainfall will likely cause significant and possibly catastrophic, life-threatening flash flooding and mudslides to the Mexican States of Chiapas, Oaxaca, and southeast Guerrero, particularly in areas near the coast. For a complete depiction of forecast rainfall associated with Hurricane John, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep5.shtml?rainqpf STORM SURGE: A life-threatening storm surge is expected to produce significant coastal flooding near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Hurricane conditions are expected to reach the coast within the hurricane warning area tonight. Winds are expected to first reach tropical storm strength later this afternoon, making outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. Tropical storm conditions are expected to first reach the coast within the tropical storm warning area this evening. SURF: Swells associated with John are forecast to continue affecting the coast of southern Mexico during the next couple of days, with the potential for dangerous surf and rip currents much of the week. Please see local statements for more information. NEXT ADVISORY ------------- Next intermediate advisory at 600 PM CST. Next complete advisory at 900 PM CST. $$ Forecaster Hagen

Issued at 2100 UTC MON SEP 23 2024 000 WTPZ25 KNHC 232047 TCMEP5 HURRICANE JOHN FORECAST/ADVISORY NUMBER 6 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 2100 UTC MON SEP 23 2024 HURRICANE CENTER LOCATED NEAR 15.5N 98.5W AT 23/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH OR 0 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 973 MB MAX SUSTAINED WINDS 85 KT WITH GUSTS TO 105 KT. 64 KT....... 10NE 10SE 0SW 10NW. 50 KT....... 20NE 20SE 15SW 20NW. 34 KT....... 40NE 40SE 30SW 40NW. 12 FT SEAS.. 45NE 75SE 75SW 45NW. 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 15.5N 98.5W AT 23/2100Z AT 23/1800Z CENTER WAS LOCATED NEAR 15.2N 98.4W FORECAST VALID 24/0600Z 16.0N 98.3W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 10NE 10SE 10SW 10NW. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 50NE 60SE 60SW 40NW. FORECAST VALID 24/1800Z 16.5N 98.3W...INLAND MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 0NE 10SE 10SW 0NW. 50 KT... 15NE 20SE 20SW 15NW. 34 KT... 30NE 60SE 80SW 30NW. FORECAST VALID 25/0600Z 16.7N 98.4W...POST-TROP/INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 25/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.5N 98.5W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPEP5...AT 24/0000Z NEXT ADVISORY AT 24/0300Z $$ FORECASTER HAGEN

5-Day Uncertainty Track last updated Mon, 23 Sep 2024 18:05:05 GMT


Wind Speed Probabilities last updated Mon, 23 Sep 2024 18:05:05 GMT

Issued at 1200 PM CST Mon Sep 23 2024 000 WTPZ45 KNHC 231758 TCDEP5 Hurricane John Special Discussion Number 5 NWS National Hurricane Center Miami FL EP102024 1200 PM CST Mon Sep 23 2024 John has continued to rapidly intensify and the latest images suggest an eye may be forming on visible and infrared imagery. Recent objective intensity estimates from UW-CIMSS range from 65 to 85 kt. The current intensity estimate is increased to 75 kt. The new NHC intensity forecast shows John strengthening to a major hurricane prior to reaching the coast of Mexico. It is possible that the hurricane could strengthen more than forecast. Only a minor tweak was made to the previous NHC track forecast to show landfall occurring a bit sooner. Residents of Mexico in the hurricane warning area should rush preparations to completion this afternoon. KEY MESSAGES: 1. John is expected to continue rapidly intensifying, and is forecast to become a major hurricane before the center reaches the coast of southern Mexico within the Hurricane Warning area on Tuesday. Damaging hurricane-force winds and a dangerous storm surge are expected within portions of the warning area. 2. John will bring very heavy rainfall to coastal portions of southern Mexico through this week. This heavy rainfall will likely cause significant and possibly catastrophic, life-threatening flash flooding and mudslides to the Mexican States of Chiapas, Oaxaca, and southeast Guerrero, particularly in areas near the coast. FORECAST POSITIONS AND MAX WINDS INIT 23/1800Z 15.1N 98.4W 75 KT 85 MPH 12H 24/0000Z 15.3N 98.2W 90 KT 105 MPH 24H 24/1200Z 15.8N 97.9W 105 KT 120 MPH 36H 25/0000Z 16.1N 97.6W 90 KT 105 MPH...INLAND 48H 25/1200Z 16.3N 97.4W 35 KT 40 MPH...INLAND 60H 26/0000Z...DISSIPATED $$ Forecaster Hagen

Issued at 1800 UTC MON SEP 23 2024 000 FOPZ15 KNHC 231757 PWSEP5 HURRICANE JOHN SPECIAL WIND SPEED PROBABILITIES NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 1800 UTC MON SEP 23 2024 AT 1800Z THE CENTER OF HURRICANE JOHN WAS LOCATED NEAR LATITUDE 15.1 NORTH...LONGITUDE 98.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 75 KTS ...85 MPH...140 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) PACIFIC DAYLIGHT TIME (PDT)...SUBTRACT 7 HOURS FROM Z TIME HAWAIIAN STANDARD TIME (HST)...SUBTRACT 10 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 12Z MON 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 12Z MON 00Z TUE 12Z TUE 00Z WED 12Z WED 12Z THU 12Z FRI PERIODS TO TO TO TO TO TO TO 00Z TUE 12Z TUE 00Z WED 12Z WED 12Z THU 12Z FRI 12Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT ZIHUATANEJO 34 X 1( 1) 1( 2) 1( 3) X( 3) X( 3) X( 3) 15N 100W 34 2 3( 5) 4( 9) 4(13) X(13) X(13) X(13) ACAPULCO 34 X 4( 4) 6(10) 4(14) X(14) X(14) X(14) P MALDONADO 34 16 45(61) 10(71) 2(73) X(73) X(73) X(73) P MALDONADO 50 1 12(13) 9(22) 1(23) X(23) X(23) X(23) P MALDONADO 64 X 6( 6) 4(10) 2(12) X(12) X(12) X(12) P ANGEL 34 2 25(27) 33(60) 6(66) X(66) X(66) X(66) P ANGEL 50 X 2( 2) 12(14) 6(20) X(20) X(20) X(20) P ANGEL 64 X X( X) 5( 5) 3( 8) X( 8) X( 8) X( 8) HUATULCO 34 X 6( 6) 19(25) 5(30) X(30) X(30) X(30) HUATULCO 50 X X( X) 6( 6) 4(10) X(10) X(10) X(10) HUATULCO 64 X X( X) 2( 2) 1( 3) X( 3) X( 3) X( 3) 15N 95W 34 X 2( 2) 6( 8) 5(13) X(13) X(13) X(13) $$ FORECASTER HAGEN

000
ABPZ20 KNHC 231757
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 AM PDT Mon Sep 23 2024

For the eastern North Pacific...east of 140 degrees west longitude:

Active Systems:
The National Hurricane Center is issuing advisories on recently
upgraded Hurricane John, located just south of southern Mexico.

East-Central Portion of the East Pacific:
A trough of low pressure located several hundred miles southwest of
southwestern Mexico is producing limited shower and thunderstorm
activity. Environmental conditions only appear marginally favorable
for gradual development of this system while it moves slowly
eastward to the south of the coast of Mexico through the middle of
this week.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...low...10 percent.

&&
Public Advisories on Hurricane John are issued under WMO header
WTPZ35 KNHC and under AWIPS header MIATCPEP5.
Forecast/Advisories on Hurricane John are issued under WMO header
WTPZ25 KNHC and under AWIPS header MIATCMEP5.

$$
Forecaster Hagen

Issued at 1800 UTC MON SEP 23 2024 000 WTPZ25 KNHC 231756 TCMEP5 HURRICANE JOHN SPECIAL FORECAST/ADVISORY NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL EP102024 1800 UTC MON SEP 23 2024 HURRICANE CENTER LOCATED NEAR 15.1N 98.4W AT 23/1800Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH OR 5 DEGREES AT 3 KT ESTIMATED MINIMUM CENTRAL PRESSURE 980 MB MAX SUSTAINED WINDS 75 KT WITH GUSTS TO 90 KT. 64 KT....... 10NE 10SE 0SW 10NW. 50 KT....... 20NE 20SE 15SW 20NW. 34 KT....... 40NE 40SE 30SW 40NW. 12 FT SEAS.. 45NE 75SE 75SW 45NW. 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 15.1N 98.4W AT 23/1800Z AT 23/1200Z CENTER WAS LOCATED NEAR 14.6N 98.6W FORECAST VALID 24/0000Z 15.3N 98.2W MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 10NE 10SE 0SW 0NW. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 40NE 40SE 40SW 30NW. FORECAST VALID 24/1200Z 15.8N 97.9W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 10NE 10SE 10SW 10NW. 50 KT... 20NE 20SE 20SW 20NW. 34 KT... 50NE 60SE 60SW 40NW. FORECAST VALID 25/0000Z 16.1N 97.6W...INLAND MAX WIND 90 KT...GUSTS 110 KT. 64 KT... 5NE 10SE 10SW 5NW. 50 KT... 15NE 20SE 20SW 15NW. 34 KT... 40NE 80SE 80SW 40NW. FORECAST VALID 25/1200Z 16.3N 97.4W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 40SE 30SW 0NW. FORECAST VALID 26/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.1N 98.4W INTERMEDIATE PUBLIC ADVISORY...WTNT35 KNHC/MIATCPEP5...AT 23/1800Z NEXT ADVISORY AT 23/2100Z $$ FORECASTER HAGEN

Issued at 1200 PM CST Mon Sep 23 2024 000 WTPZ35 KNHC 231756 TCPEP5 BULLETIN Hurricane John Special Advisory Number 5 NWS National Hurricane Center Miami FL EP102024 1200 PM CST Mon Sep 23 2024 ...JOHN CONTINUES TO RAPIDLY STRENGTHEN AND FORECAST TO BECOME A MAJOR HURRICANE... ...DAMAGING HURRICANE-FORCE WINDS, A DANGEROUS STORM SURGE, AND LIFE-THREATENING FLASH FLOODING EXPECTED IN PORTIONS OF SOUTHERN MEXICO... SUMMARY OF 1200 PM CST...1800 UTC...INFORMATION ----------------------------------------------- LOCATION...15.1N 98.4W ABOUT 85 MI...135 KM S OF PUNTA MALDONADO MEXICO ABOUT 100 MI...160 KM WSW OF PUERTO ESCONDIDO MEXICO MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...N OR 5 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...980 MB...28.94 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has issued a Tropical Storm Warning from west of Punta Maldonado to Acapulco. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Punta Maldonado to Bahias de Huatulco A Tropical Storm Warning is in effect for... * East of Bahias de Huatulco to Salina Cruz * West of Punta Maldonado to Acapulco A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 24 to 36 h. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 24 to 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1200 PM CST (1800 UTC), the center of Hurricane John was located near latitude 15.1 North, longitude 98.4 West. John is moving toward the north near 3 mph (6 km/h). A slow motion to the north-northeast or northeast is expected for the next couple of days. On the forecast track, the center of the system is forecast to approach the southern coast of Mexico tonight, and move inland on Tuesday. Maximum sustained winds are near 85 mph (140 km/h) with higher gusts. Rapid strengthening is forecast, and John is expected to become a major hurricane before the center reaches the coast of southern Mexico on Tuesday. Hurricane-force winds extend outward up to 10 miles (20 km) from the center and tropical-storm-force winds extend outward up to 45 miles (75 km). The estimated minimum central pressure is 980 mb (28.94 inches). HAZARDS AFFECTING LAND ---------------------- Key Messages for John can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP5 and WMO header WTPZ45 KNHC and on the web at hurricanes.gov/text/MIATCDEP5.shtml RAINFALL: Through Thursday, John is expected to produce 6 to 12 inches of rain with isolated totals around 15 inches across the coastal areas of Chiapas. In areas along and near the Oaxaca coast to southeast Guerrero, between 10 and 20 inches of rain with isolated totals near 30 inches can be expected through Thursday. This heavy rainfall will likely cause significant and possibly catastrophic, life-threatening flash flooding and mudslides to the Mexican States of Chiapas, Oaxaca, and southeast Guerrero, particularly in areas near the coast. For a complete depiction of forecast rainfall associated with Hurricane John, please see the National Weather Service Storm Total Rainfall Graphic, available at hurricanes.gov/graphics_ep5.shtml?rainqpf STORM SURGE: A dangerous storm surge is expected to produce significant coastal flooding near and to the east of where the center makes landfall. Near the coast, the surge will be accompanied by large and destructive waves. WIND: Hurricane conditions are expected to reach the coast within the hurricane warning area tonight or early Tuesday morning. Winds are expected to first reach tropical storm strength later today, making outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. Tropical storm conditions are expected to first reach the coast within the tropical storm warning area early Tuesday. SURF: Swells associated with John are forecast to continue affecting the coast of southern Mexico during the next couple of days, with the potential for dangerous surf and rip currents much of the week. Please see local statements for more information. NEXT ADVISORY ------------- Next complete advisory at 300 PM CST. $$ Forecaster Hagen

Issued at 1145 AM CST Mon Sep 23 2024 000 WTPZ65 KNHC 231747 TCUEP5 Hurricane John Tropical Cyclone Update NWS National Hurricane Center Miami FL EP102024 1145 AM CST Mon Sep 23 2024 Satellite imagery indicates that John continues to rapidly strengthen with estimated maximum sustained winds of 85 mph (140 km/h). A special advisory will be issued by 1200 PM CST (1800 UTC) to reflect this intensity change and update the track and intensity forecast. The special advisory will be issued in lieu of the 1200 PM CST (1800 UTC) intermediate advisory. SUMMARY OF 1145 AM CST...1745 UTC...INFORMATION ---------------------------------------------- LOCATION...15.1N 98.4W ABOUT 85 MI...135 KM S OF PUNTA MALDONADO MEXICO ABOUT 100 MI...160 KM WSW OF PUERTO ESCONDIDO MEXICO MAXIMUM SUSTAINED WINDS...85 MPH...140 KM/H PRESENT MOVEMENT...N OR 5 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...980 MB...28.94 INCHES $$ Forecaster Brown

...EYEWALL OF JOHN VERY NEAR THE COAST... ...DAMAGING HURRICANE-FORCE WINDS, LIFE-THREATENING STORM SURGE AND FLASH FLOODING ARE IMMINENT... As of 6:00 PM CST Mon Sep 23 the center of John was located near 15.9, -98.6 with movement N at 8 mph. The minimum central pressure was 970 mb with maximum sustained winds of about 105 mph.