000
AXPZ20 KNHC 230343
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SAT FEB 23 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 
0300 UTC.

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

THE MONSOON TROUGH IS ALONG 03N77W TO 08N87W TO 05N92W. THE 
INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM 05N92W TO 
06N120W TO 07N140W. SCATTERED MODERATE WITHIN 120 NM N OF THE 
ITCZ BETWEEN 110W AND 118W...WITHIN 60 NM N OF THE ITCZ BETWEEN 
130W AND 133W...AND ALSO FROM 06N TO 08N W OF 136W.

...DISCUSSION...

1036 MB SURFACE HIGH PRES IS WELL NW OF THE DISCUSSION WATERS 
CENTERED NEAR 36N145W. A RIDGE EXTENDS SOUTHEASTWARD FROM THE 
HIGH THROUGH 32N133W TO 26N120W WITH A TERMINUS NEAR 16N105W. A 
TIGHT PRES GRADIENT IS IN PLACE SW OF THIS RIDGE AND N OF THE 
ITCZ SUPPORTING FRESH TO STRONG NE-E TRADES ACROSS THE NW CORNER 
AND W CENTRAL WATERS...AS INDICATED BY EARLIER SCATTEROMETER 
PASSES. SEAS OF 8-12 FT IN MIXED NE AND NW SWELL ARE COINCIDENT 
WITH THESE WINDS. THE HIGH AND ATTENDANT RIDGE WILL DRIFT 
EASTWARD DURING THE WEEKEND ALLOWING FOR THE COVERAGE OF FRESH 
TO STRONG WINDS TO SHRINK TO FROM 08N TO 16N W OF 130W BY SUN 
EVENING.

TROUGHING ALONG THE EASTERN GULF OF CALIFORNIA COAST/WESTERN 
MEXICAN COAST COMBINED WITH THE RIDGE TO THE W OF THE BAJA 
CALIFORNIA PENINSULA WILL RESULT IN FRESH TO STRONG NORTHERLY 
WINDS IN THE GULF OF CALIFORNIA S OF 27N LATER TONIGHT. THE 
WINDS WILL DIMINISH TEMPORARILY BY SAT EVENING...RETURNING AT 
20-30 KT N OF 25N BY SUN MORNING THROUGH EARLY NEXT WEEK AS 
STRONG HIGH PRES DEVELOPS OVER THE U.S. GREAT BASIN REGION.

TROUGHING WILL SET UP OVER INTERIOR CALIFORNIA SAT WHILE THE 
HIGH SLIDES EASTWARD. THIS WILL RESULT IN GALE FORCE NORTHERLY 
WINDS ACROSS THE CALIFORNIA COASTAL AND OFFSHORE WATERS N OF 
30N. THESE WINDS WILL BUILD UP SEAS TO 14-15 FT WHICH WILL 
SPREAD S OF 30N BY SUN MORNING ALONG WITH A SPURT OF FRESH TO 
STRONG NORTHERLY WINDS...DIMINISHING BY SUN EVENING.

GAP WINDS...                                                     
NE-E 20-25 KT WINDS WILL PULSE IN THE GULF OF PAPAGAYO LATER 
TONIGHT THROUGH SAT MORNING...DIMINISHING BY SAT AFTERNOON. 
WINDS WILL THEN LIKELY REMAIN MODERATE TO FRESH DURING 
SUBSEQUENT NIGHTS/EARLY MORNINGS THROUGH EARLY NEXT WEEK.

$$
LEWITSKY