000
AXPZ20 KNHC 020943
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE APR 02 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
MONSOON TROUGH 10N95W TO 10N87W THEN ITCZ TO 06N107W TO 03N134W TO 
02N140W.  SCATTERED MODERATE ISOLATED STRONG WITHIN 75 NM OF AXIS FROM
87W TO 91W AND WITHIN 90 NM OF AXIS W OF 120W.

...DISCUSSION... 
UPPER LEVEL RIDGE CREST ALONG 130W BRING ABUNDANT MOISTURE ALOFT INTO
BASIN ALTHOUGH SURFACE HIGH PRES CENTER MAINTAINS STABLE ATMOSPHERE AT
LOWER LEVELS WITH LITTLE CONVECTION EXCEPT ALONG ITCZ W OF 120W. UPPER
LEVEL TROUGH S OF 20N ALONG 113W BRINGS DRY AIR MASS TO TROPICAL E PAC
FROM 100W TO 120W.  

...ELSEWHERE AT THE LOWER LEVELS...
SURFACE HIGH PRES 1023 MB AT 30N125W EXPECTED TO DRIFT N OF BASIN TODAY
BUT THEN RETURN S OF 30N AND STRENGTHEN. FRESH TO STRONG NW WINDS ALONG
COAST OF BAJA CALIFORNIA REMAIN STEADY TILL THU THEN DIMINISH AS HIGH
PRES DRIFT W.  

LINGERING E SWELL TRAIN PRODUCED BY PREVIOUS GULF OF PAPAGAYO EVENT
CURRENTLY W OF 120W MERGES WITH NW SWELLS FROM LOW PRES NW OF BASIN TO
ENLARGE AREA OF 8-10 FT SEAS.     

...OUTLOOK...
WITH WESTWARD DRIFT AND STRENGTHENING OF HIGH PRES TO 1027 MB...NEXT 
APPROACHING COLD FRONT DOES NOT STAND A CHANCE TO MOVE INTO BASIN.  
NW WINDS ALONG COAST OF BAJA CALIFORNIA MAY BECOME A FRESH BREEZE WITH
SEAS TO 9 FT AND NE TRADES S OF 20N W OF 120W MAY INCREASE TO A STRONG
BREEZE BY END OF WEEK.

NEW COLD FRONT APPROACHES NW CORNER OF E PAC JUST TO SUFFER THE SAME
FATE AS THE PREVIOUS ONES...GET DEFLECTED NE BY WELL ANCHORED HIGH 
PRES CENTER 1022 MB.  ONLY BRIEF INSTANCES OF FRESH S-SE WINDS FOLLOWED
BY NW WIND SHIFT EXPECTED.  ITS NW SWELL CROSSES S OF 30N INTO E PAC 
AND SPREAD S TO MERGE WITH LINGERING SWELLS ALREADY IN REGION.  

GULF OF TEHUANTEPEC...COLD FRONT IN GULF OF MEXICO EXPECTED TO FUNNEL
WINDS ACROSS CHIVELAS PASS INTO GULF OF TEHUANTEPEC BY END OF WEEK.
WINDS MAY APPROACH NEAR GALE FORCE FRI AND SAT.  

$$
WALLY BARNES