000
AXPZ20 KNHC 091557
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON APR 09 2007

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1415 UTC.

...ITCZ...
AXIS 6N77W 8N109W 6N140W. SCATTERED 
MODERATE WITHIN 120 NM OF THE AXIS BETWEEN 82W AND 88W...AND 
WITHIN 120 NM S OF THE AXIS BETWEEN 93W AND 95W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 120 NM OF THE AXIS BETWEEN 119W 
AND 133W.

...DISCUSSION...

REX BLOCK PATTERN SET UP GENERALLY ALONG 140W WITH UPPER LOW 
CENTERED NEAR 13N143W AND UPPER RIDGING TO THE N. FURTHER 
E...TROUGH CONTINUES TO DIG THROUGH THE BAJA AREA...EXTENDING 
FROM 28N110W TO 15N120W. UPPER DIFFLUENCE ON THE E SIDE OF THIS 
TROUGH IS ENHANCING CONVECTION ALONG ITCZ. AT THE SURFACE 1026 
MB HIGH PRES IS CENTERED NW OF THE DISCUSSION AREA NEAR 31N140W. 
PERSISTENT FRESH TRADE WINDS ARE NOTED ON A MORNING SHIP 
OBSERVATION TO THE S OF THE SURFACE HIGH. 

LOOKING AHEAD...AMPLIFIED REX PATTERN BREAKS DOWN AND FLOW 
BECOMES MORE ZONAL OVER THE NEXT 48 HOURS. WINDS WILL INCREASE 
OFF THE NRN BAJA COAST TONIGHT THROUGH WED BETWEEN HIGH PRES TO 
THE W AND DEVELOPING LOW PRES OVER SW U.S. TRADES S OF THE HIGH 
REMAIN ACTIVE.

LARGE SWELL TO IMPACT PACIFIC COASTAL AREAS OF MEXICO AND 
CENTRAL AMERICA TODAY AND TONIGHT...WITH HEIGHTS OF UP TO EIGHT 
FEET AND PERIODS OF UP TO 20 SECONDS...POSSIBLY RESULTING IN 
DANGEROUS SURF CONDITIONS.

$$
CHRISTENSEN