000
AXPZ20 KNHC 102117
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC SUN APR 10 2011

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 INTERTROPICAL CONVERGENCE ZONE AXIS WAS ANALYZED FROM 09N84W 
TO 08N96W THEN RESUMES FROM 06N99W TO 03N113W TO 07N122W THEN 
RESUMES FROM 03N127W TO 00N135W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WAS NOTED FROM 04N TO 09N E OF 90W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION WAS NOTED FROM 04N TO 09N 
BETWEEN 95W AND 102W.

...DISCUSSION...

SURFACE HIGH PRESSURE 1031 MB IS CENTERED NEAR 20N131W WITH 
RIDGE EXTENDING TO NEAR 13N105W. THE PRESSURE GRADIENT BETWEEN 
THIS FEATURE AND LOWER PRESSURE IN THE VICINITY OF THE ITCZ IS 
SUPPORTING FRESH TO STRONG TRADEWINDS FROM 08N TO 23N W OF 116W. 
ADDITIONALLY THE PRESSURE GRADIENT BETWEEN THIS FEATURE AND LOW 
PRESSURE OVER SOUTHERN TEXAS AND TROUGHING OVER CENTRAL MEXICO 
IS SUPPORTING FRESH NW TO N WINDS OVER THE GULF OF 
CALIFORNIA...AND WEST OF THE BAJA PENINSULA. HIGH PRESSURE WILL 
PREVAIL OVER THE SAME GENERAL AREA THROUGH THE FORECAST 
PERIOD...MAINTAINING THE FRESH TRADE WINDS AND THE FRESH 
NORTHERLY WINDS OFF THE COAST OF BAJA CALIFORNIA. 

NE TO E WINDS WILL CONTINUE TO PULSE TO 20 KT IN THE GULF OF 
PAPAGAYO DURING THE NEXT FEW DAYS WITH SEAS REMAINING JUST BELOW 
8 FT. THE LARGEST AREAL EXTENT OF THE 20 KT WINDS WILL BE IN THE 
EARLY MORNING HOURS WITH THE AID OF NOCTURNAL DRAINAGE FLOW. 

$$
AL