000
AXPZ20 KNHC 130920
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC FRI MAR 13 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. 

...SPECIAL FEATURES...
    
GULF OF TEHUANTEPEC GALE WARNING...1020 MB HIGH PRES CENTERED 
OVER EASTERN MEXICO NEAR 21N97W MAINTAINING A MODERATE PRESSURE 
GRADIENT FROM THE GULF OF MEXICO TO EASTERN PACIFIC...ALLOWING 
SMALL AREA OF MINIMAL GALE FORCE WINDS N OF 15N IN THE GULF OF 
TEHUANTEPEC. WINDS WILL DIMINISH BELOW GALE FORCE LATER THIS 
MORNING AFTERNOON...WITH A SMALL AREA OF FRESH TO STRONG WINDS 
PREVAILING N OF 14N-15N THROUGH EARLY SUN.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
            
ITCZ EXTENDS FROM 09N85W TO 04N94W TO 06N112W TO 05N123W TO 
06N140W. NO SIGNIFICANT CONVECTION. 

...DISCUSSION... 

HIGH PRES CENTERED OVER THE SW N ATLC WATERS COMBINED WITH LOWER 
PRESSURE IN THE VICINITY OF THE ITCZ IN THE EPAC IS MAINTAINING 
SPORATIC FRESH TO STRONG GAP WINDS THROUGH THE GULF OF PAPAGAYO. 
THESE WINDS WILL CONTINUE WITH SEAS TO 8 FT DOWNWIND OF THE GULF 
OF PAPAGAYO THROUGH SAT THEN DIMINISH SUN. FRESH 15-20 KT WINDS 
ARE ALSO FUNNELING INTO THE GULF OF PANAMA.

HIGH PRES BUILDING OVER THE GREAT BASIN REGION COMBINED WITH 
TROUGHING OVER MEXICO WILL PRODUCE ENOUGH OF A PRESSURE GRADIENT 
TO SUPPORT SMALL AREA OF FRESH TO STRONG WINDS N OF 30N IN THE 
GULF OF CALIFORNIA LATER THIS MORNING. HIGH PRESSURE WILL WEAKEN 
THROUGH TONIGHT WITH WINDS DIMINISHING BELOW ADVISORY CRITERIA.

A MODERATE RIDGE N OF THE AREA IS SUPPORTING FRESH TRADE WINDS N 
OF THE CONVERGENCE ZONE W OF 125W WITH SEAS AROUND 7-8 FT. THE 
RIDGE WILL WEAKEN E OF AN APPROACHING COLD FRONT THIS WEEKEND. 
THE FRONT WILL PUSH INTO NW PORTION OF AREA SAT AND LOSE PUNCH 
BUT NW SWELL TO 9-10 FT ASSOCIATED WITH THE FRONT WILL EXTEND 
FROM 30N135W TO 24N140W SAT THEN GRADUALLY SUBSIDE THROUGH SUN.

$$
MUNDELL