000
AXPZ20 KNHC 260332
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI MAR 26 2010

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0245 UTC.

...ITCZ...
THE ITCZ AXIS IS ALONG 04.5N77W TO 08N89W TO 04N114W 03N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 240 NM N OF 
AXIS BETWEEN 99W AND 123W. SCATTERED MODERATE CONVECTION WITHIN 
120 NM N OF AXIS W OF 123W. 

...DISCUSSION...
IN THE UPPER LEVELS...ZONAL FLOW PREVAILS N OF 14N WHILE A SHORT 
WAVE TROUGH JUST REACHING 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...OVER BAJA CALIFORNIA 
AND N MEXICO. IN THE DEEP TROPICS...ITCZ CONVECTION IS 
MAINTAINING UPPER LEVEL RIDGING ALONG 08N. 

AT THE SURFACE...THE PRESSURE GRADIENT BETWEEN THE ITCZ AND A 
1028 MB HIGH PRESSURE CENTERED NEAR 34N138W IS MAINTAINING A 
BROAD AREA OF FRESH TO STRONG TRADE WINDS. 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 AND IN THE GULF OF CALIFORNIA. 

GAP WINDS...
WINDS ACROSS THE GULF OF PAPAGAYO HAVE DIMINISHED BELOW 20 
KT...BUT ARE EXPECTED INCREASE AGAIN IN 36 HOURS. 

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

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

$$
AL