Eastern North Pacific Tropical Weather Outlook

National Hurricane Center (NHC) Pacific Map
2 months 2 weeks ago
000
ABPZ20 KNHC 151717
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
1100 AM PDT Thu May 15 2025

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

Tropical cyclone formation is not expected during the next 7 days.

&&
Today marks the first day of the eastern North Pacific hurricane
season, which will run until November 30. Long-term averages for
the number of named storms, hurricanes, and major hurricanes are
15, 8, and 4, respectively.

The list of names for 2025 is as follows:

Name Pronunciation Name Pronunciation
-------------------------------------------------------------
Alvin AL-vin Mario MAR-ee-o
Barbara BAR-bruh Narda NAHR-duh
Cosme COS-may Octave AHK-tayv
Dalila dah-LY-lah Priscilla prih-SIH-luh
Erick EHR-ik Raymond RAY-mund
Flossie FLOSS-ee Sonia SOHN-yah
Gil gill Tico TEE-koh
Henriette hen-ree-ETT Velma VELL-muh
Ivo EE-voh Wallis WAHL-lis
Juliette joo-lee-ET Xina ZEE-nah
Kiko KEE-ko York york
Lorena low-RAY-na Zelda ZEL-dah

A full list of eastern North Pacific basin tropical cyclone names
and pronunciations can be found at:
https://www.nhc.noaa.gov/pdf/aboutnames_pronounce_epac.pdf

This product, the Tropical Weather Outlook, briefly describes
significant areas of disturbed weather and their potential for
tropical cyclone formation during the next seven days. The issuance
times of this product are 5 AM, 11 AM, 5 PM, and 11 PM PDT. After
the change to standard time in November, the issuance times are
4 AM, 10 AM, 4 PM, and 10 PM PST.

A Special Tropical Weather Outlook will be issued to provide
updates, as necessary, in between the regularly scheduled issuances
of the Tropical Weather Outlook. Special Tropical Weather Outlooks
will be issued under the same WMO and AWIPS headers as the regular
Tropical Weather Outlooks.

A standard package of products, consisting of the tropical cyclone
public advisory, the forecast/advisory, the cyclone discussion, and
a wind speed probability product, is issued every six hours for all
ongoing tropical cyclones. In addition, a special advisory package
may be issued at any time to advise of significant unexpected
changes or to modify watches or warnings.

NHC has the option to issue advisories, watches, and warnings for
disturbances that are not yet a tropical cyclone, but which pose
the threat of bringing tropical storm or hurricane conditions to
land areas within 72 hours. For these land-threatening "potential
tropical cyclones", NHC will issue the full suite of advisory and
watch/warning products. Potential tropical cyclones share the
naming conventions currently in place for tropical depressions,
being numbered from a single list (e.g., "One-E", "Two-E",
"Three-E", etc.).

The Tropical Cyclone Update is a brief statement to inform of
significant changes in a tropical cyclone, to post or cancel
watches or warnings, or to provide hourly position updates between
intermediate advisories when the storm center is easily followed by
radar. The Tropical Cyclone Update is also used in lieu of or to
precede the issuance of a special advisory package. Tropical
Cyclone Updates, which can be issued at any time, can be found
under WMO header WTPZ61-65 KNHC, and under AWIPS header MIATCUEP1-5.

All NHC text and graphical products are available on the web at
https://www.hurricanes.gov. More information on NHC text and
graphical products can be found at
https://www.nhc.noaa.gov/pdf/NHC_Product_Description.pdf. New and
updated products for the 2025 season can be found at
https://www.nhc.noaa.gov/pdf/NHC_New_Products_Updates_2025.pdf.

You can also interact with NHC on Facebook at
https://www.facebook.com/NWSNHC. Notifications are available
via X when select NHC products are issued. Information about our
east and central Pacific X feed (@NHC_Pacific) is available at
https://www.nhc.noaa.gov/socialmedia

$$
Forecaster Cangialosi
NHC Webmaster

Eastern North Pacific Tropical Weather Outlook

National Hurricane Center (NHC) Pacific Map
2 months 2 weeks ago
181
ABPZ20 KNHC 151305
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 AM PDT Thu May 15 2025

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

Tropical cyclone formation is not expected during the next 7 days.

&&
Today marks the first day of the eastern North Pacific hurricane
season, which will run until November 30. Long-term averages for
the number of named storms, hurricanes, and major hurricanes are
15, 8, and 4, respectively.

The list of names for 2025 is as follows:

Name Pronunciation Name Pronunciation
-------------------------------------------------------------
Alvin AL-vin Mario MAR-ee-o
Barbara BAR-bruh Narda NAHR-duh
Cosme COS-may Octave AHK-tayv
Dalila dah-LY-lah Priscilla prih-SIH-luh
Erick EHR-ik Raymond RAY-mund
Flossie FLOSS-ee Sonia SOHN-yah
Gil gill Tico TEE-koh
Henriette hen-ree-ETT Velma VELL-muh
Ivo EE-voh Wallis WAHL-lis
Juliette joo-lee-ET Xina ZEE-nah
Kiko KEE-ko York york
Lorena low-RAY-na Zelda ZEL-dah

A full list of eastern North Pacific basin tropical cyclone names
and pronunciations can be found at:
https://www.nhc.noaa.gov/pdf/aboutnames_pronounce_epac.pdf

This product, the Tropical Weather Outlook, briefly describes
significant areas of disturbed weather and their potential for
tropical cyclone formation during the next seven days. The issuance
times of this product are 5 AM, 11 AM, 5 PM, and 11 PM PDT. After
the change to standard time in November, the issuance times are
4 AM, 10 AM, 4 PM, and 10 PM PST.

A Special Tropical Weather Outlook will be issued to provide
updates, as necessary, in between the regularly scheduled issuances
of the Tropical Weather Outlook. Special Tropical Weather Outlooks
will be issued under the same WMO and AWIPS headers as the regular
Tropical Weather Outlooks.

A standard package of products, consisting of the tropical cyclone
public advisory, the forecast/advisory, the cyclone discussion, and
a wind speed probability product, is issued every six hours for all
ongoing tropical cyclones. In addition, a special advisory package
may be issued at any time to advise of significant unexpected
changes or to modify watches or warnings.

NHC has the option to issue advisories, watches, and warnings for
disturbances that are not yet a tropical cyclone, but which pose
the threat of bringing tropical storm or hurricane conditions to
land areas within 72 hours. For these land-threatening "potential
tropical cyclones", NHC will issue the full suite of advisory and
watch/warning products. Potential tropical cyclones share the
naming conventions currently in place for tropical depressions,
being numbered from a single list (e.g., "One-E", "Two-E",
"Three-E", etc.).

The Tropical Cyclone Update is a brief statement to inform of
significant changes in a tropical cyclone, to post or cancel
watches or warnings, or to provide hourly position updates between
intermediate advisories when the storm center is easily followed by
radar. The Tropical Cyclone Update is also used in lieu of or to
precede the issuance of a special advisory package. Tropical
Cyclone Updates, which can be issued at any time, can be found
under WMO header WTPZ61-65 KNHC, and under AWIPS header MIATCUEP1-5.

All NHC text and graphical products are available on the web at
https://www.hurricanes.gov. More information on NHC text and
graphical products can be found at
https://www.nhc.noaa.gov/pdf/NHC_Product_Description.pdf. New and
updated products for the 2025 season can be found at
https://www.nhc.noaa.gov/pdf/NHC_New_Products_Updates_2025.pdf.

You can also interact with NHC on Facebook at
https://www.facebook.com/NWSNHC. Notifications are available
via X when select NHC products are issued. Information about our
east and central Pacific X feed (@NHC_Pacific) is available at
https://www.nhc.noaa.gov/socialmedia

$$
Forecaster Cangialosi
NHC Webmaster

Eastern North Pacific Tropical Weather Outlook

National Hurricane Center (NHC) Pacific Map
2 months 2 weeks ago
000
ABPZ20 KNHC 151147
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
500 AM PDT Thu May 15 2025

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

Tropical cyclone formation is not expected during the next 7 days.

&&
Today marks the first day of the eastern North Pacific hurricane
season, which will run until November 30. Long-term averages for
the number of named storms, hurricanes, and major hurricanes are
15, 8, and 4, respectively.

The list of names for 2025 is as follows:

Name Pronunciation Name Pronunciation
-------------------------------------------------------------
Alvin AL-vin Mario MAR-ee-o
Barbara BAR-bruh Narda NAHR-duh
Cosme COS-may Octave AHK-tayv
Dalila dah-LY-lah Priscilla prih-SIH-luh
Erick EHR-ik Raymond RAY-mund
Flossie FLOSS-ee Sonia SOHN-yah
Gil gill Tico TEE-koh
Henriette hen-ree-ETT Velma VELL-muh
Ivo EE-voh Wallis WAHL-lis
Juliette joo-lee-ET Xina ZEE-nah
Kiko KEE-ko York york
Lorena low-RAY-na Zelda ZEL-dah

A full list of eastern North Pacific basin tropical cyclone names
and pronunciations can be found at:
https://www.nhc.noaa.gov/pdf/aboutnames_pronounce_epac.pdf

This product, the Tropical Weather Outlook, briefly describes
significant areas of disturbed weather and their potential for
tropical cyclone formation during the next seven days. The issuance
times of this product are 5 AM, 11 AM, 5 PM, and 11 PM PDT. After
the change to standard time in November, the issuance times are
4 AM, 10 AM, 4 PM, and 10 PM PST.

A Special Tropical Weather Outlook will be issued to provide
updates, as necessary, in between the regularly scheduled issuances
of the Tropical Weather Outlook. Special Tropical Weather Outlooks
will be issued under the same WMO and AWIPS headers as the regular
Tropical Weather Outlooks.

A standard package of products, consisting of the tropical cyclone
public advisory, the forecast/advisory, the cyclone discussion, and
a wind speed probability product, is issued every six hours for all
ongoing tropical cyclones. In addition, a special advisory package
may be issued at any time to advise of significant unexpected
changes or to modify watches or warnings.

NHC has the option to issue advisories, watches, and warnings for
disturbances that are not yet a tropical cyclone, but which pose
the threat of bringing tropical storm or hurricane conditions to
land areas within 72 hours. For these land-threatening "potential
tropical cyclones", NHC will issue the full suite of advisory and
watch/warning products. Potential tropical cyclones share the
naming conventions currently in place for tropical depressions,
being numbered from a single list (e.g., "One-E", "Two-E",
"Three-E", etc.).

The Tropical Cyclone Update is a brief statement to inform of
significant changes in a tropical cyclone, to post or cancel
watches or warnings, or to provide hourly position updates between
intermediate advisories when the storm center is easily followed by
radar. The Tropical Cyclone Update is also used in lieu of or to
precede the issuance of a special advisory package. Tropical
Cyclone Updates, which can be issued at any time, can be found
under WMO header WTPZ61-65 KNHC, and under AWIPS header MIATCUEP1-5.

All NHC text and graphical products are available on the web at
https://www.hurricanes.gov. More information on NHC text and
graphical products can be found at
https://www.nhc.noaa.gov/pdf/NHC_Product_Description.pdf. New and
updated products for the 2025 season can be found at
https://www.nhc.noaa.gov/pdf/NHC_New_Products_Updates_2025.pdf.

You can also interact with NHC on Facebook at
https://www.facebook.com/NWSNHC. Notifications are available
via X when select NHC products are issued. Information about our
east and central Pacific X feed (@NHC_Pacific) is available at
https://www.nhc.noaa.gov/socialmedia

$$
Forecaster Cangialosi
NHC Webmaster

Eastern North Pacific Tropical Weather Outlook

National Hurricane Center (NHC) Pacific Map
8 months 2 weeks ago

000
ABPZ20 KNHC 171121
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
400 AM PST Sun Nov 17 2024

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

Central Portion of the East Pacific:
An elongated area of low pressure located a few hundred miles
southwest of the coast of southwestern Mexico continues to produce
disorganized shower and thunderstorm activity. Development, if any,
should be slow to occur over the next couple of days while the
system moves slowly eastward or east-northeastward.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...low...10 percent.

$$
Forecaster Kelly
NHC Webmaster

Eastern North Pacific Tropical Weather Outlook

National Hurricane Center (NHC) Pacific Map
8 months 2 weeks ago

000
ABPZ20 KNHC 162341
TWOEP

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
400 PM PST Sat Nov 16 2024

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

Central Portion of the East Pacific:
Disorganized shower and thunderstorm activity continues in
association with an elongated area of low pressure located several
hundred miles southwest of the coast of southwestern Mexico.
Development, if any, should be slow to occur over the next couple of
days while the system moves slowly eastward or east-northeastward.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 7 days...low...10 percent.

$$
Forecaster Reinhart
NHC Webmaster

Tropical Storm Lane Forecast Discussion Number 5

National Hurricane Center (NHC) Pacific Map
9 months ago
Issued at 200 PM PDT Sat Nov 02 2024 000 WTPZ43 KNHC 022037 TCDEP3 Tropical Storm Lane Discussion Number 5 NWS National Hurricane Center Miami FL EP132024 200 PM PDT Sat Nov 02 2024 Satellite imagery depicts that Lane has been struggling the last several hours, and appears more disorganized. The overall convective canopy has deteriorated with warming cloud tops. Southwesterly shear is starting to increase based on the latest visible images, and the low-level center is located on the southwest edge of the convection. Objective and subjective satellite intensity estimates have remained steady throughout the day around 35 to 45 kt. Given the current satellite presentation and using a blend of these satellite estimates, the initial intensity is held at 40 kt for this advisory. Lane continues to move generally westward at 270/6 kt, and this general motion should continue over the next few days as the storm is steered by a a subtropical ridge to the north. The latest NHC forecast is very similar to the previous one, with a slight nudge to the left. Some intensity fluctuations are possible through today, though southwesterly shear is starting to increase over the system. This shear combined with a drier airmass along the forecast track will lead to a steady weakening trend beginning on Sunday. Lane is forecast to degenerate to a post-tropical remnant low in about 36 h, although given the small size of the system it could dissipate even sooner than forecast. FORECAST POSITIONS AND MAX WINDS INIT 02/2100Z 11.3N 130.3W 40 KT 45 MPH 12H 03/0600Z 11.3N 131.4W 40 KT 45 MPH 24H 03/1800Z 11.2N 132.6W 35 KT 40 MPH 36H 04/0600Z 11.3N 133.9W 30 KT 35 MPH...POST-TROP/REMNT LOW 48H 04/1800Z 11.4N 135.3W 25 KT 30 MPH...POST-TROP/REMNT LOW 60H 05/0600Z...DISSIPATED $$ Forecaster Kelly
NHC Webmaster

Tropical Storm Lane Wind Speed Probabilities Number 5

National Hurricane Center (NHC) Pacific Map
9 months ago
Issued at 2100 UTC SAT NOV 02 2024 000 FOPZ13 KNHC 022035 PWSEP3 TROPICAL STORM LANE WIND SPEED PROBABILITIES NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL EP132024 2100 UTC SAT NOV 02 2024 AT 2100Z THE CENTER OF TROPICAL STORM LANE WAS LOCATED NEAR LATITUDE 11.3 NORTH...LONGITUDE 130.3 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 40 KTS...45 MPH...75 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 SAT 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 SAT 06Z SUN 18Z SUN 06Z MON 18Z MON 18Z TUE 18Z WED PERIODS TO TO TO TO TO TO TO 06Z SUN 18Z SUN 06Z MON 18Z MON 18Z TUE 18Z WED 18Z THU FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT 10N 135W 34 X 1( 1) 1( 2) 1( 3) 1( 4) X( 4) X( 4) $$ FORECASTER KELLY
NHC Webmaster

Tropical Storm Lane Forecast Advisory Number 5

National Hurricane Center (NHC) Pacific Map
9 months ago
Issued at 2100 UTC SAT NOV 02 2024 000 WTPZ23 KNHC 022035 TCMEP3 TROPICAL STORM LANE FORECAST/ADVISORY NUMBER 5 NWS NATIONAL HURRICANE CENTER MIAMI FL EP132024 2100 UTC SAT NOV 02 2024 TROPICAL STORM CENTER LOCATED NEAR 11.3N 130.3W AT 02/2100Z POSITION ACCURATE WITHIN 30 NM PRESENT MOVEMENT TOWARD THE WEST OR 270 DEGREES AT 6 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1004 MB MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT. 34 KT....... 40NE 0SE 0SW 40NW. 12 FT SEAS.. 0NE 0SE 0SW 75NW. 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 11.3N 130.3W AT 02/2100Z AT 02/1800Z CENTER WAS LOCATED NEAR 11.3N 130.0W FORECAST VALID 03/0600Z 11.3N 131.4W MAX WIND 40 KT...GUSTS 50 KT. 34 KT... 30NE 0SE 0SW 30NW. FORECAST VALID 03/1800Z 11.2N 132.6W MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 30NE 0SE 0SW 30NW. FORECAST VALID 04/0600Z 11.3N 133.9W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 04/1800Z 11.4N 135.3W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 05/0600Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 11.3N 130.3W NEXT ADVISORY AT 03/0300Z $$ FORECASTER KELLY
NHC Webmaster
Checked
5 years 10 months ago
National Hurricane Center (NHC) Pacific Map
Active tropical cyclones in the Eastern North Pacific
URL
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