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

Eastern Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 241538
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC MON NOV 24 2014

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1445 UTC.  

...SPECIAL FEATURE...                                        
MOST OF THE GLOBAL MODELS CONTINUE TO SUGGEST A GALE TO MINIMAL 
STORM FORCE WIND EVENT ACROSS THE GULF OF TEHUANTEPEC. THIS WILL 
BE ASSOCIATED WITH A STRONG COLD FRONT CURRENTLY MOVING THROUGH 
THE NW GULF OF MEXICO THAT WILL BRIEFLY STALL THROUGH MIDDAY 
TUE. STRONG HIGH PRESSURE BUILDING EASTWARD IN THE WAKE OF THE 
FRONT WILL PUSH THE FRONT SE OF THE GULF ON WED AND INDUCE 
NORTHERLY GALE FORCE WINDS BEHIND THE FRONT OVER THE GULF OF 
MEXICO TUE AFTERNOON THROUGH EARLY WED. THIS EVENT IS EXPECTED 
TO REACH GALE FORCE CONDITIONS BY OVERNIGHT TUESDAY NIGHT AND 
MINIMAL STORM FORCE CONDITIONS BY WED MORNING THROUGH THU 
MORNING WITH GALE CONDITIONS PERSISTING THROUGH SAT MORNING. 
GIVEN THE POTENTIAL FOR STRONG WINDS...WAVEWATCH3 GUIDANCE 
INDICATES SEAS RANGING FROM 20 TO 23 FT. A GALE WARNING HAS BEEN 
ISSUED FOR THE GULF OF TEHUANTEPEC AT 24/0600 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...            
MONSOON TROUGH EXTENDS FROM 10N85W ALONG 11N91W 9N105W TO NEAR 
THE 1009 MB LOW NEAR 11N112W. ITCZ BEGINS S OF LOW NEAR 9N114W 
AND CONTINUES ALONG 9N127W TO 6N140W. SCATTERED MODERATE TO 
STRONG CONVECTION IS WITHIN 180 NM OF THE 1009 MB LOW OVER NE 
SEMICIRCLE. SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS 
WITHIN 120 NM ALONG THE COAST OF COLOMBIA BETWEEN 2N-5N AND 
WITHIN 180 NM S OF ITCZ BETWEEN 114W AND 118W. SCATTERED 
MODERATE CONVECTION IS WITHIN 150 NM S OF THE MONSOON TROUGH 
BETWEEN 105W AND 108W.

...DISCUSSION...                                                 
A 1030 MB HIGH IS LOCATED N OF AREA NEAR 36N130W AND EXTENDS A 
RIDGE AXIS SE ACROSS THE N WATERS TO NEAR 12N120W. THE PRESSURE 
GRADIENT BETWEEN THIS RIDGE AND LOWER PRESSURE IN THE VICINITY 
OF THE ITCZ IS STRONG ENOUGH TO SUPPORT AN AREA OF FRESH TO 
STRONG NE TRADE WINDS OVER MUCH OF THE REGION FROM 10N TO 23N W 
OF 125W. AS THE HIGH PRESSURE CONTINUES TO MIGRATE EASTWARD THE 
PRESSURE GRADIENT WILL WEAKEN ACROSS THE WESTERN WATERS AND 
DIMINISHING THE AREA OF FRESH TO STRONG NE WINDS SLIGHTLY BY 
LATE TODAY. THIS IS ALSO INCREASING THE WINDS OVER THE GULF OF 
CALIFORNIA WHERE THERE ARE FRESH TO STRONG NE WINDS WITH SEAS 
GRADUALLY BUILDING TO 8 TO 10 FT OVER THE NEXT COUPLE OF DAYS. 
STRONG WINDS ARE EXPECTED W OF THE BAJA PENINSULA STARTING LATE 
TONIGHT WITH SEAS BUILDING TO 10 FT. WINDS FUNNELING THROUGH 
MOUNTAIN PASSES ARE LIKELY TO BE STRONGER. 

A NEW COLD FRONT IS EXPECTED TO APPROACH THE NW WATERS LATE TUE 
REACHING THE FAR NW CORNER OF THE FORECAST REGION BY LATE TUE 
NIGHT. FRESH TO STRONG SOUTHERLY WINDS ARE EXPECTED AHEAD OF THE 
COLD FRONT COVERING THE FAR NW AREA WITH SEAS BUILDING TO 10FT. 
THIS FRONT WILL ALSO BRING A NEW ROUND OF NW SWELL TO THE 
FORECAST WATERS. THE NW SWELL ALREADY IN PLACE AND NE WIND WAVES 
OVER MUCH OF THE AREA N OF 08N W OF 117W WILL KEEP SEAS IN THE 8-
10 FT RANGE THROUGH TUE.

A SURFACE TROUGH IS ANALYZED FROM 14N111W TO A 1009 MB LOW NEAR 
11N114W WHICH IS EMBEDDED WITHIN THE MONSOON TROUGH/ITCZ. THE 
TROUGH/LOW WILL CONTINUE TO MOVE WESTWARD AT AROUND 10 KT DURING 
THE NEXT COUPLE OF DAYS. WINDS OF MAINLY 20 TO 25 KT AND SEAS OF 
8 TO 9 FT WILL BE ASSOCIATED WITH THESE FEATURES.

LOOKING AHEAD...AS STRONG HIGH PRESSURE BUILDS EASTWARD IN THE 
WAKE OF THE COLD FRONT FORECAST TO MOVE ACROSS THE GULF OF 
MEXICO...EXPECT STRONG NE WINDS ACROSS THE GULF OF PAPAGAYO 
BEGINNING WED NIGHT INTO EARLY THU MORNING WITH POSSIBLE FRESH 
TO STRONG NE WINDS IN THE GULF OF FONSECA. 

$$
PAW


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: Monday, 24-Nov-2014 15:38:26 UTC