000
AXPZ20 KNHC 270305
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI APR 27 2012

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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N84W TO 06N101W THEN ITCZ TO LOW PRES AT 
07N112W 1010 MB TO 02N140W. SCATTERED MODERATE TO STRONG 
CONVECTION WAS NOTED WITHIN 120 NM OF MONSOON TROUGH BETWEEN 85W 
AND 93W. SCATTERED MODERATE ISOLATED STRONG CONVECTION WAS 
NOTED WITHIN 180 NM OF AXIS BETWEEN 101W AND 117W.

...DISCUSSION...

HIGH PRES 1025 MB IS CENTERED JUST W OF THE AREA NEAR 30N145W 
WITH RIDGE EXTENDING SE TO NEAR 20N111W. THE PRESSURE GRADIENT 
BETWEEN THIS AREA OF HIGH PRESSURE AND LOWER PRESSURE IN THE 
VICINITY OF THE ITCZ IS PRODUCING FRESH TRADEWINDS FROM 05N TO 
17N W OF 120W. THE PRESSURE GRADIENT BETWEEN THIS AREA OF HIGH 
PRESSURE AND LOWER PRESSURE OVER THE SW UNITED STATES IS 
PRODUCING FRESH NW WINDS WITHIN 120 NM OF W COAST OF BAJA 
CALIFORNIA. THE AREA OF HIGH PRESSURE WILL CONTINUE TO BUILD 
OVER THE NEXT COUPLE OF DAYS AND EXPAND COVERAGE OF FRESH 
TRADEWINDS AND NW WINDS OFF THE W COAST OF BAJA CALIFORNIA.

GAP WINDS...
THE EASTWARD DRIFT OF THE AREA OF HIGH PRESSURE OVER THE GULF OF 
MEXICO HAS VEERED WIND FLOW OVER THE SW GULF OF MEXICO. THIS HAS 
DIMINISHED WIND FLOW ACROSS THE ISTHMUS OF TEHUANTEPEC...AND 
WINDS OVER THE GULF OF TEHUANTEPEC HAVE DIMINISHED BELOW 20 KT 
TODAY. THE GRADIENT OVER THE CARIBBEAN SEA HAS ALSO RELAXED AND 
DIMINISHED WINDS BLOWING ACROSS CENTRAL AMERICA. AS A 
RESULT...WINDS OVER THE GULF OF PAPAGAYO AND PANAMA HAVE ALSO 
DIMINISHED BELOW 20 KT.

$$
AL