000
AXPZ20 KNHC 262203
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.
 
...ITCZ...
AXIS IS CENTERED FROM 09N83W TO 12N95W TO 10N102W TO 10N112W TO 
06N130W TO 06N140W. ISOLATED MODERATE CONVECTION IS FROM 05N TO 
10N BETWEEN 78W AND 88W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS FROM 08N TO 13N BETWEEN 89W AND 100W. ISOLATED 
MODERATE CONVECTION IS FROM 08N TO 11N BETWEEN 110W AND 
117W...AND FROM 04N TO 07N BETWEEN 133W AND 138W.  

...DISCUSSION...

IN THE UPPER LEVELS...
AN UPPER LEVEL LOW IS CENTERED NEAR 23N137W. UPPER LEVEL 
DIFFLUENCE E OF THE CENTER IS PRODUCING SCATTERED TO BROKEN HIGH 
CLOUD FROM 20N-25N BETWEEN 127W-131W. AN UPPER LEVEL HIGH IS 
CENTERED NEAR 15N115W. ANOTHER UPPER LEVEL HIGH IS CENTERED N OF 
THE GULF OF TEHUANTEPEC AT 17N96W. THIS SYSTEM IS PRODUCING NE 
SHEAR OVER THE SURFACE LOW AT 12N94W PRODUCING AN UNFAVORABLE 
ENVIRONMENT ALOFT AND PRECLUDES ANY SIGNIFICANT TROPICAL 
ORGANIZATION. 

...AT THE SURFACE...
A 1010 MB LOW IS EMBEDDED ON THE ITCZ S OF THE GULF OF 
TEHUANTEPEC AT 12N94W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS FROM 08N TO 13N BETWEEN 89W AND 100W. A SURFACE 
TROUGH IS EMBEDDED ON THE ITCZ ALONG 12N111W 07N112W. ISOLATED 
MODERATE CONVECTION IS FROM 08N TO 11N BETWEEN 110W AND 117W. A 
1011 MB LOW IS ALSO EMBEDDED ON THE ITCZ AT 06N137W. ISOLATED 
MODERATE CONVECTION IS FROM 04N TO 07N BETWEEN 133W AND 138W. 
ELSEWHERE...A 1029 MB HIGH IS CENTERED NW OF THE AREA AT 
32N149W. A RIDGE AXIS EXTENDS E FROM THE HIGH TO N BAJA 
CALIFORNIA AT 32N117W. A TIGHT SURFACE PRESSURE GRADIENT EXITS 
ALONG THE COAST OF S CALIFORNIA AND THE N BAJA CALIFORNIA WHERE 
A GALE IS DEVELOPING WITHIN 24 HOURS. 10-12 FT NW SEA SWELL IS 
ALSO MOVING S ALONG THE W BAJA CALIFORNIA COAST. FRESH NE TRADES 
ARE ALSO FROM 08N TO 21N W OF 128W.

LARGE CROSS-EQUATORIAL SW LONG PERIOD SWELL HAS SEAS TO 8 FT S 
OF 07N W OF 95W. THE SWELL WILL SUBSIDE BY THE END OF THE 
FORECAST PERIOD AS IT SPREADS NORTHWARD.

$$
FORMOSA