000
AXPZ20 KNHC 231536
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED APR 23 2008

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 
1530 UTC.

...ITCZ...
ITCZ AXIS ALONG 05N77W TO 03N104W TO 00N118W TO 01N140W. 
SCATTERED MODERATE ISOLATED STRONG FROM 03N TO 07N BETWEEN 78W 
AND 106W.

...DISCUSSION...
FAIRLY ZONAL PATTERN IN PLACE OVER THE AREA WITH FLAT BROAD 
UPPER LEVEL TROUGH EXTENDING FROM THE SW CONUS/ARIZONA THROUGH
25N125W TO 22N135W. AXIS OF SUBTROPICAL JETSTREAM WITH WINDS OF 
85-100 KT CUTS ACROSS SE PORTION OF TROUGH THROUGH 21N140W 
25N120W ACROSS CENTRAL BAJA CALIFORNIA TO NW MEXICO INTO W 
TEXAS. MODERATE TO STRONG SUBSIDENCE NOTED WITHIN 120 NM EITHER 
SIDE OF THE TROUGH AXIS. BROKEN/OVERCAST CIRRUS CLOUDS ARE NOTED 
WITHIN 240 NM S OF THE JET. ANTICYCLONIC CIRCULATION CENTERED 
NEAR 8N120W WITH BROAD RIDGE COVERING REMAINING AREA S OF 20N W 
OF 110W.

UPPER LEVEL RIDGE EXTENDS FROM COLOMBIA WWD ACROSS PANAMA AND 
COSTA RICA TO 12N100W. DRY AIR IS LOCATED N OF THE RIDGE AXIS 
WITH ABUNDANT TROPICAL MOISTURE S OF THE RIDGE AXIS WITHIN AN 
AREA OF DIFLUENT FLOW. A NARROW TROUGH/SHEAR AXIS SEPARATES THE 
ANTICYCLONIC CIRCULATION AND THE RIDGE FROM CENTRAL MEXICO FROM 
19N97W TO 7N108W.

AT THE SURFACE...A 1024 MB HIGH PRES IS CENTERED NEAR 27N135W 
WITH RIDGE FROM THE HIGH TO 11N1110W. MODERATE TRADE WINDS ARE 
NOTED S OF THE HIGH FROM 7N-20N AND W OF 120W. THESE TRADES WERE 
ADVECTING SOME BROKEN STRATOCUMULUS CLOUDS IN THE AREA.

$$
COBB