000
AXPZ20 KNHC 220326
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI FEB 22 2013

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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...

A MONSOON TROUGH EXTENDS SW FROM THE COAST OF COLOMBIA AT 04N77W 
TO 03N83W WHERE LOW LEVEL WINDS INDICATE A TRANSITION TO AN ITCZ
WHICH CONTINUES W ALONG 05N94W TO 03N108W TO 07N127W TO BEYOND 
05N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS NOTED 
WITHIN 60 NM EITHER SIDE OF A LINE FROM 07N83W TO 04N98W...AND 
WITHIN 90 NM EITHER SIDE OF A LINE FROM 13N113W TO 07N122W TO 
08N123W TO 07N127W TO 07N140W. 

...DISCUSSION...

NEARLY STATIONARY 1037 MB SURFACE HIGH PRES IS POSITIONED NW OF 
THE DISCUSSION WATERS NEAR 37N148W. A RIDGE EXTENDS TO THE SE 
FROM THE HIGH CENTER THROUGH 32N137W TO A FAIRLY SHARP CREST AT 
13N97W. THE PRESSURE GRADIENT SW OF THE RIDGE IS SUPPORTING NE 
TRADES AT 20 TO 25 KT IN THE AREA FROM 08N TO 17N TO THE W OF 
125W...WITH SEAS OF 9 TO 12 FT. MIXED N SWELL IS OBSERVED 
ELSEWHERE TO THE W OF LINE FROM THE SOUTHERN TIP OF THE BAJA 
PENINSULA AT 23N110W TO 07N118W TO 06N140W RESULTING IN SEAS OF 
7 TO 11 FT. THE GRADIENT WILL RELAX SOME OVER THE NEXT COUPLE OF 
DAYS WITH THE TRADES DIMINISHING TO 15 TO 20 KT...BUT SEAS WILL 
CONTINUE AT 7 TO 11 FT TO THE N OF 08N AND W OF 115W. 

HIGH PRES WILL BUILD OVER THE U.S. FOUR CORNERS REGION LATE FRI 
THROUGH THE WEEKEND WHILE ELONGATED SURFACE TROUGHING SETS UP 
ALONG THE EASTERN GULF OF CALIFORNIA/WESTERN MEXICAN COAST. THIS 
WILL INCREASE THE NORTHERLY WINDS TO 20 TO 25 KT ACROSS THE 
SOUTHERN GULF OF CALIFORNIA...ROUGHLY TO THE S OF 28N...LATE FRI 
AND PERSISTING THROUGH LATE SAT. 

GAP WINDS...
FRESH TO STRONG WINDS WILL CONTINUE TO PULSE IN THE GULF OF 
PAPAGAYO...WITH THE STRONGEST WINDS OCCURRING DURING THE 
OVERNIGHT AND EARLY MORNING HOURS WITH ENHANCEMENT BY NOCTURNAL 
DRAINAGE FLOW. ASSOCIATED SIGNIFICANT WAVE HEIGHTS WILL PEAK TO 
AROUND 8 FT TONIGHT AND FRI. THE AREAL COVERAGE OF THESE WINDS 
WILL STRETCH WESTWARD TO NEAR 90W...DIMINISHING SAT AFTERNOON AS 
THE PRES GRADIENT OVER THE REGION SLACKENS.

$$
NELSON