000
AXPZ20 KNHC 241518
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 24 2009

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS IS ALONG 4N77W 5N90W 3N105W 7N125W 5N140W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 120 NM N OF AXIS FROM 130W TO 
134W.

...DISCUSSION...
MID/UPPER LEVEL RIDGE WITH AXIS FROM THE SW U.S. ACROSS BAJA 
CALIFORNIA TO 10N119W. THE RIDGE COMBINED WITH A CYCLONIC 
CIRCULATION W OF THE DISCUSSION AREA IS PRODUCING SW UPPER LEVEL 
WINDS WHICH IS ADVECTING TROPICAL MOISTURE NEWD...WITH BROKEN TO 
OVERCAST MULTI LEVEL CLOUDS BETWEEN A LINE FROM THE SOUTHERN 
BAJA PENINSULA TO 12N140W AND 32N126W TO 20N140W. A MID/UPPER 
LEVEL TROUGH IS E OF THE RIDGE FROM SW TEXAS ACROSS CENTRAL 
MEXICO.

UPPER LEVEL TROUGH IN THE DEEP TROPICS EXTENDS FROM 15N106W TO
3N102W. AN UPPER RIDGE IS E OF THE TROUGH WITH AXIS FROM 
ANTICYCLONIC CIRCULATION OVER COLOMBIA ACROSS CENTRAL AMERICA TO 
THE YUCATAN PENINSULA. CIRCULATION AROUND THESE TWO FEATURES IS 
ADVECTING MID AND HIGH LEVEL CLOUDS FROM EARLIER CONVECTION 
ALONG THE ITCZ INTO CENTRAL AMERICA.

SURFACE TROUGH IS ANALYZED ALONG THE ITCZ FROM 8N98W TO 2N100W.
SCATTERED SHOWERS ASSOCIATED WITH THE TROUGH FROM 5N-8N BETWEEN 
96W-100W. ANOTHER TROUGH EXTENDS FROM THE COLORADO RIVER VALLEY 
INTO THE GULF OF CALIFORNIA TO NEAR 28N112W. A 1019 MB SURFACE 
HIGH PRES IS CENTERED NEAR 27N130W WITH RIDGE EXTENDING FROM THE 
HIGH TO 17N106W. STRONG ELY WINDS CONTINUE TO BLOW THROUGH THE 
GULF OF PAPAGAYO REGION.

$$
DGS