| HOME | ARCHIVES | FORECASTS | IMAGERY | ABOUT NHC | RECONNAISSANCE |

Eastern North Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 270351
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
247 UTC Sun May 27 2018

Tropical Weather Discussion for the eastern Pacific Ocean from
the Equator to 32N, east of 140W. The following information is
based on satellite imagery, weather observations, radar, and
meteorological analysis.

Based on 0000 UTC surface analysis and satellite imagery through
0245 UTC. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

The monsoon trough extends from 14N91W to 10N100W to 09N113W to 
07N123W to 09N133W. The ITCZ extends from 08N137W to beyond 
07N140W. Scattered moderate and isolated strong convection is 
noted from 06N to 11N between 84W and 95W, from 05N to 10N 
between 101W and 112W and from 06N to 08N between 114W and 125W.

A 1010 mb surface low centered near 09N136W separates the 
monsoon trough from the ITCZ. a surface trough extends NE from 
the low to 14N131W. Scattered moderate and isolated strong 
convection is present from 10N to 14N between 129W and 132W.

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A ridge extends SE into the region from a 1030 mb high centered 
near 35N139W to the Revillagigedo Islands. Fresh to locally 
strong NW to N winds across the offshore waters of Baja 
California will continue through Sun, then become fresh Sun night
through Tue. Seas of 6 to 9 ft will prevail across this area 
through the weekend then diminish gradually Mon and Tue.

Gulf of California: Gentle to moderate NW winds will prevail 
across the Gulf waters through Sunday, with strong afternoon 
through evening sea breezes recurring along the Mexican coastline
from Mazatlan to Guaymas through Mon. A low pressure trough 
developing over the Baja Peninsula will cause winds over the Gulf
to light to gentle by Wed.

Gulf of Tehuantepec: Winds are expected to be variable during 
the next few days, with moderate NW to N winds at night and light
SW to S winds during the late mornings and afternoons.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR... 

The monsoon trough is displaced well N of its climatological 
position in response to broad low pressure that has formed over 
the Yucatan peninsula and Central America. The trough now extends
WSW from the Guatemala coastal waters. This pressure pattern 
will persist across the regional Pacific waters through at least 
Tue and support light to moderate SW to W winds and 4 to 6 ft 
seas for the waters west of Central America.

REMAINDER OF THE AREA...

NW swell associated with a dissipated frontal boundary have 
subsided enough to allow seas N of 25N and west of 138W to 
subside below 8 ft. 

Elsewhere, the ridge building over the north central Pacific is 
producing a modest pressure gradient across the trade wind belt, 
with moderate to fresh winds observed in satellite-derived wind 
data from 10N to 25N to the west of 120W. A 1010 mb low pressure
center is drifting WSW across far SW portions near 09N136W. A 
broad area of fresh to strong NE winds and seas 8 to 9 ft is 
evident near the low from 11N to 19N between 128W and 138W. The 
low will weaken to a trough on Sun as it translates westward. 
Meanwhile the expansive high centered over the central Pacific 
will slowly strengthen and shift E over the NE Pacific as it 
maintains fresh trade winds and seas from 7 to 9 ft across the 
trade wind belt through Tue night.

Deepening low pressure over the Desert SW will combined with
building high pressure W of california to tighten the pressure
gradient along the California coast. Long period N swell
generated by these winds will cause seas N of 25N between 120W
and 135W to build to between 8 and 10 ft by Wed morning.

$$
CAM

Standard version of this page

Alternate Formats
About Alternates - E-Mail Advisories - RSS Feeds

Cyclone Forecasts
Latest Advisory - Past Advisories - About Advisories

Marine Forecasts
Latest Products - About Marine Products

Tools & Data
Satellite Imagery - US Weather Radar - Aircraft Recon - Local Data Archive - Forecast Verification - Deadliest/Costliest/Most Intense

Learn About Hurricanes
Storm Names Wind Scale - Prepare - Climatology - NHC Glossary - NHC Acronyms - Frequently Asked Questions - AOML Hurricane-Research Division

About Us
About NHC - Mission/Vision - Other NCEP Centers - NHC Staff - Visitor Information - NHC Library

Contact Us


NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida, 33165-2149 USA
nhcwebmaster@noaa.gov
Disclaimer
Privacy Policy
Credits
About Us
Glossary
Career Opportunities
Page last modified: Sunday, 27-May-2018 03:51:40 UTC