000
AXPZ20 KNHC 260327
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC THU MAY 26 2011

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 
0245 UTC.
 
...ITCZ...
THE INTERTROPICAL CONVERGENCE ZONE IS FROM 07N77W TO 13N92W TO 
09N110W TO 08N130W TO 05N140W. SCATTERED MODERATE CONVECTION IS 
FROM 05N TO 10N BETWEEN 79W AND 90W...AND FROM 06N TO 12N 
BETWEEN 96W AND 103W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS FROM 08N TO 13N BETWEEN 105W AND 111W. 

...DISCUSSION...
A RAPIDLY WEAKENING COLD FRONT IS ALONG 32N124W 27N139W MOVING 
E. SCATTERED SHOWERS ARE WITHIN 60 NM W OF FRONT. A SUBTROPICAL 
RIDGE IS SE OF THE FRONT AND W OF BAJA CALIFORNIA. THE PRESSURE 
GRADIENT BETWEEN THE SUBTROPICAL RIDGE AND TROUGHING OVER THE 
SOUTHWESTERN UNITED STATES AND CENTRAL MEXICO IS PRODUCING FRESH 
NW WINDS N OF 27N E OF 120W TO BAJA CALIFORNIA. THIS AREA OF 
FRESH NW WINDS WILL EXPAND SW FOR THE NEXT 48 HOURS. 

FRESH TRADE WINDS LIE OVER CENTRAL WATERS W OF 130W. FURTHER 
N...THE DISSIPATING COLD FRONT WILL BRING A BATCH OF NW SWELL IN 
12 HOURS WITH SEAS TO 9 FT INTO THE NW PORTION OF THE FORECAST 
AREA WITH WINDS BELOW 20 KT.

CONVECTION ALONG THE ITCZ IS STRONGEST W OF THE 1010 MB EMBEDDED 
LOW PRES SYSTEM NEAR 10N105W. NORTHEASTERLY SHEAR ALOFT IS 
FORCING THE CONVECTION DOWNWIND OF THE LOW LEVEL CENTER. THE LOW 
IS EXPECTED TO DISSIPATE WITHIN 24 HOURS.

CROSS-EQUATORIAL S SWELL WITH SEAS TO 8 FT ARE OVER S CENTRAL 
WATERS S OF 10N BETWEEN 95W-130W. THIS SWELL WILL MAKE ITS WAY W 
TO 140W IN 24 HOURS AND PERSIST FOR AT LEAST 48 HOURS.

AN UPPER LEVEL LOW IS CENTERED NEAR 20N127W. DIFFLUENCE E OF THE 
CENTER IS PRODUCING SCATTERED SHOWERS FROM 17N-24N BETWEEN 
125W-135W.

$$
FORMOSA