000
AXPZ20 KNHC 260917
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN APR 26 2009

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 
0845 UTC.

...ITCZ...

THE INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...04N77W TO 
06N100W TO 06N140W. SCATTERED MODERATE CONVECTION IS WITHIN 60 
NM EITHER SIDE OF THE ITCZ AXIS FROM 90W TO 100W. SCATTERED 
MODERATE TO STRONG CONVECTION IS WITHIN 60 NM OF THE POINT 
05N119W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN THE 
AREA FROM 04N TO 06N BETWEEN 130W AND 133W. 

OTHER CONVECTION...
SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 75 NM EITHER 
SIDE OF A LINE FROM 06N128W TO 12N138W.

...DISCUSSION...
DEEP LAYER SHORTWAVE IS NORTH OF 25N AND IS MOVING RAPIDLY 
SOUTHEAST ACROSS THE NORTHEAST PART OF THE PACIFIC AREA AND 
NORTHERN BAJA CALIFORNIA AND NORTHERN GULF OF CALIFORNIA. THIS 
FEATURE WILL CONTINUE ACROSS NORTHERN MEXICO NORTH OF 25N 
THROUGH TODAY AND TONIGHT THEN BE ABSORBED BY THE WESTERLIES AS 
THE FEATURE APPROACHES TEXAS MONDAY. ONLY MINOR CLOUDINESS IS 
ASSOCIATED WITH THIS FEATURE.

STRONG FULL LATITUDE TROUGH WEST OF THE AREA WITH AN AXIS ALONG 
147W. THIS FEATURE IS FORECAST TO REMAIN NEARLY STATIONARY AND 
TO MAINTAIN STRENGTH THROUGH THE NEXT SEVERAL DAYS.  A BROAD 
PLUME OF DEEP LAYER MOISTURE AND OVERCAST MULTI LEVEL CLOUDS 
WEST OF 130W IS ASSOCIATED WITH THIS FEATURE. THE UPPER FLOW IS 
DIFFLUENT AND HAS CONTRIBUTED TO THE DEVELOPMENT OF A LARGE AREA 
OF CONVECTION AND A DEVELOPING SURFACE TROUGH NORTH OF THE ITCZ 
WEST OF ABOUT 128W. THE CONVECTION EXTENDS NORTH TO ABOUT 12N 
AND IS DESCRIBED ABOVE.

THE REMAINDER OF THE MIDDLE AND UPPER LEVELS IS COVERED BY A 
BROAD ANTICYCLONIC FLOW WHICH IS FORECAST TO PERSIST THROUGH THE 
NEXT SEVERAL DAYS.

EXCEPT FOR THE DEVELOPING SURFACE TROUGH JUST NORTH OF THE ITCZ 
WEST OF 130W A MODERATE SURFACE RIDGE IS NORTH OF THE ITCZ WEST 
OF 105W. REMAINDER OF THE AREA AT HE SURFACE IS ANALYZED AS A 
BROAD TROUGH.

NORTHEAST TO EAST GAP WINDS OF 20 TO OCCASIONALLY 25 KT IN THE 
GULF OF PAPAGAYO AREA ARE FORECAST CONTINUE THROUGH THE NEXT 
COUPLE OF DAYS THEN GRADUALLY DIMINISH.

$$
LL