000
AXPZ20 KNHC 281015
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED APR 28 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0915 UTC.

...ITCZ...
AXIS ALONG 11N863W TO 11N94W TO 05N105W TO 05N140W.  SCATTERED 
MODERATE ISOLATED STRONG CONVECTION S OF 10N E OF 105W.  
ISOLATED MODERATE CONVECTION WITHIN 120 NM OF AXIS W OF 116W.

...DISCUSSION...
UPPER LEVEL TROUGH FROM CENTRAL TEXAS TO 24N110W MAINTAINS DRY 
AIR MASS TO ITS N.  EMBEDDED SHORTWAVE TROUGH EXTEND SW INTO 
AREA TO 24N109W.  MOISTURE SWATH ALOFT ADVECTS NE AHEAD OF 
TROUGH INTO GULF OF MEXICO.  MID TO UPPER LEVEL RIDGE EXTENDS W 
ACROSS TROPICAL E PAC ALONG 11N E OF 135W.  AS RIDGE LIES OVER 
PERSISTENT SURFACE TROUGH NOW ALONG 86W...SCATTERED DEEP 
CONVECTION IS ENHANCED...BUT LITTLE ORGANIZATION CAN BE NOTED 
WITH IR SATELLITE IMAGES.  LATE MORNING VISIBLE MIGHT SHOW SOME 
INTENSIFICATION AS MOIST WARM SW WINDS ARE INCREASING. 

ELSEWHERE AT THE SURFACE...
COLD FRONT BECOMING DIFFUSE TONIGHT 32N126W TO 27N130W.  
NORTHERLY WINDS W OF FRONT VEER NE TONIGHT AND THU AS NW SWELLS 
SPREAD SE INTO BASIN AND MERGE WITH CROSS EQUATORIAL SW SWELL IN 
DEEP TROPICS S OF 10N.  PRES GRADIENT TIGHTENS TONIGHT THROUGH 
FRI WITH STRONG N WINDS OVER MOST OF AREA N OF 18N LATE THU. SW 
STRONG WINDS OVER AREA S OF 09N E OF SURFACE TROUGH THU AND FRI.

$$
WALLY BARNES