000
AXPZ20 KNHC 252116
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU MAR 25 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
THE ITCZ AXIS IS ALONG 05N77W TO 08N89W TO 04N114W 03.5N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 180 NM S OF 
AXIS E OF 82W. SCATTERED MODERATE ISOLATED STRONG CONVECTION 
WITHIN 240 NM S OF AXIS BETWEEN 94W AND 99W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 150 NM N OF AXIS W OF 100W.

...DISCUSSION...
IN THE UPPER LEVELS...ZONAL FLOW PREVAILS N OF 14N WHILE A SHORT 
WAVE TROUGH IS APPROACHING THE NW CORNER OF THE AREA. THE WLY 
FLOW IS TRANSPORTING A WIDE BAND OF MID TO UPPER LEVEL MOISTURE 
ACROSS THE AREA...MAINLY FROM 20N TO 28N...INTO THE BAJA 
CALIFORNIA PENINSULA AND N MEXICO. 

IN THE DEEP TROPICS...ITCZ CONVECTION IS MAINTAINING UPPER LEVEL 
RIDGING ALONG 07N. 

AT THE SURFACE...THE PRESSURE GRADIENT BETWEEN THE ITCZ AND A 
1028 MB HIGH PRESSURE CENTERED NEAR 34N141W IS MAINTAINING A 
BROAD AREA OF FRESH TO STRONG TRADE WINDS...WHICH IS NOTED IN 
THE LATEST ASCAT PASS. THIS HIGH PRESSURE WILL SHIFT E TO JUST N 
OF THE AREA AND MAINTAIN THE COVERAGE OF FRESH TO STRONG TRADES 
THROUGH THE REMAINDER OF THE FORECAST PERIOD. IN ADDITION...THE 
PRES GRADIENT BETWEEN THIS HIGH AND LOWER PRES OVER THE SW CONUS 
AND NORTHERN MEXICO WILL PRODUCE NW WINDS OF AROUND 20 KT NEAR 
THE WEST COAST OF THE NORTHERN BAJA PENINSULA. 

GAP WINDS
WINDS ARE DIMINISHING ACROSS THE GULF OF PAPAGAYO...AND ARE 
EXPECTED TO DROP BELOW 20 KT IN ABOUT 06 HOURS BUT WILL INCREASE 
AGAIN IN 42 HOURS. 

A COLD FRONT MOVING ACROSS THE GULF OF MEXICO WILL MOVE ACROSS 
THE BAY OF CAMPECHE TONIGHT. AS A RESULT...WINDS FUNNELING INTO 
THE GULF OF TEHUANTEPEC WILL INCREASE. THIS WILL PRODUCE STRONG 
TO NEAR GALE NORTHERLY WINDS OVER THE GULF OF TEHUANTEPEC BY FRI 
MORNING. 

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
AL/GR