Skip Navigation Links weather.gov   
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
National Hurricane Center
Local forecast by
"City, St" or "ZIP"

 
Alternate Formats
   Text     |   Mobile
   Email   |   RSS XML/RSS logo
   About Alternates
Cyclone Forecasts
   Latest Advisory
   Past Advisories
   Audio/Podcasts
   About Advisories
Marine Forecasts
   Atlantic & E Pacific
   Gridded Marine
   About Marine
Tools & Data
   Satellite | Radar
   Analysis Tools
   Aircraft Recon
   GIS Datasets
   Data Archive
Development
   Experimental
   Research
   Forecast Accuracy
Outreach & Education
   Prepare
   Storm Surge
   About Cyclones
   Cyclone Names
   Wind Scale
   Most Extreme
   Forecast Models
   Breakpoints
   Resources
   Glossary | Acronyms
   Frequent Questions
Our Organization
   About NHC
   Mission & Vision
   Staff | Q&A
   Visitors | Virtual Tour
   Library Branch
   NCEP | Newsletter
Contact Us
   Comments
Follow the National Hurricane Center on Facebook Follow the National Hurricane Center on Twitter
Subscribe the National Hurricane Center on YouTube Read the National Hurricane Center Inside the Eye blog on WordPress
FirstGov.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.
 
 

Eastern Pacific Tropical Weather Discussion



000
AXPZ20 KNHC 270940
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC MON APR 27 2015

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC. 

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

ITCZ AXIS EXTENDS FROM 06N93W TO 09N108W TO 08N116W TO 02N128W 
TO 04N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 
04N TO 07N BETWEEN 96W AND 100W...AND FROM 03N TO 12N BETWEEN 
111W AND 120W.

...DISCUSSION...    

WATER VAPOR IMAGERY SHOWS A MID-UPPER LEVEL TROUGH EXTENDING 
FROM NEW MEXICO ACROSS NW MEXICO AND THE CENTRAL BAJA PENINSULA 
TO 21N127W. DRY STABLE AIR ALOFT IS W OF THE TROUGH AND A WIDE 
SWATH OF TROPICAL MOISTURE IS BEING ADVECTED NE E OF THE TROUGH 
FROM ACTIVE CONVECTION OCCURRING NEAR THE ITCZ.

STRONG NW WINDS ASSOCIATED WITH A TIGHT PRESSURE GRADIENT W OF 
SO-CAL EXTEND INTO DISCUSSION WATERS N OF 27N BETWEEN 118W AND 
122W...PRODUCING FRESH NW SWELL OF 8-11 FT REACHING TO 24N W OF 
BAJA CALIFORNIA. WINDS WILL DIMINISH TO 20 KT OR LESS LATER 
TODAY AND SEAS WILL SUBSIDE TO LESS THAN 8 FT EARLY TUE MORNING.

1026 MB SURFACE HIGH CENTERED NEAR 32N132W EXTENDS A RIDGE TO 
AROUND 17N W OF 119W. THE PRESSURE GRADIENT SW OF THE RIDGE AND 
LOWER PRESSURE NEAR THE ITCZ IS SUPPORTING FRESH TO STRONG TRADE 
WINDS FROM 10N TO 13N BETWEEN 127W AND 134W. THE GRADIENT WILL 
SLACKEN THROUGH 48 HOURS...ALLOWING WINDS AND SEAS TO DIMINISH 
IN THIS AREA THROUGH WED.

NW SWELL ASSOCIATED WITH A COLD FRONT STRETCHING FROM A LOW NEAR 
38N142W TO THE HAWAIIAN ISLANDS WILL REACH FAR NW PART OF THE 
AREA TUE...THEN QUICKLY BECOME DIFFUSE THROUGH WED AFTERNOON.

GFS MODEL GUIDANCE SHOWS WINDS REACHING MINIMAL GALE FORCE IN 
THE GULF OF TEHUANTEPEC LATE WED NIGHT AND EARLY THU MORNING 
WITH SEAS RAPIDLY BUILDING TO 11-12 FT.

$$
MUNDELL


Quick Navigation Links:
Tropical Cyclone Forecasts  -  Tropical Marine Forecasts  -  Data Archive
Outreach  -  Prepare  -  About Cyclones  -  About NHC  -  Contact Us

NOAA/ National Weather Service
National Centers for Environmental Prediction
National Hurricane Center
11691 SW 17th Street
Miami, Florida 33165 USA
nhcwebmaster@noaa.gov
Disclaimer
Credits
Information Quality
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities
Page last modified: Monday, 27-Apr-2015 09:40:13 UTC