000
AXPZ20 KNHC 201522
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC THU MAR 20 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 
1500 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG THE LINE...4N77W 4N110W 7N130W 
6N140W. SCATTERED MODERATE WITH ISOLATED STRONG CONVECTION IS 
WITHIN 60 NM OF THE POINT 6N124W. SCATTERED MODERATE CONVECTION 
IS WITHIN 60 NM OF THE POINT 7N129W. SCATTERED MODERATE WITH 
ISOLATED STRONG CONVECTION IS WITHIN THE AREA FROM 6N TO 8N FROM 
132W TO 139W.

...DISCUSSION...
UPPER LEVELS...
A MAINLY UPPER TROUGH IS OVER THE AREA EAST OF A LINE 30N110W TO 
7N120W 13N105W TO BEYOND 25N93W.  THIS AREA IS MOVING EAST AND 
IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVELS.

A DEEP LAYER TROUGH IS JUST WEST OF THE AREA AND EXTENDS EAST OF 
140W TO A LINE 32N135W 17N135W 11N140W. THIS SYSTEM WILL REMAIN 
NEARLY STATIONARY AND SLOWLY WEAKEN. THIS AREA IS MOIST BUT 
CLOUD FREE IN THE MIDDLE AND UPPER LEVEL N OF 20N AND DRY AND 
CLOUD FREE IN THE MIDDLE AND UPPER LEVELS S OF 20N.

REMAINDER OF THE AREA IS BROAD ANTICYCLONIC FLOW.

A BROAD PLUME OF UPPER MOISTURE IS FLOWING NORTH FROM THE ITCZ 
WITHIN 300 NM EITHER SIDE OF A LINE 7N135W TO 30N125W THEN 
NORTHEAST OVER NORTHWEST MEXICO AND SOUTHERN CALIFORNIA.

SURFACE...
MODERATE SURFACE RIDGE IS NORTH OF 13N WEST OF 113W. ELSEWHERE 
BROAD TROUGH IS ANALYZED.

GAP WINDS OF GALE FORCE IN THE GULF OF TEHUANTEPEC REGION WILL 
CONTINUE TROUGH MIDDAY FRIDAY THEN RAPIDLY DIMINISH TO LESS 
THAN 20 KT FRIDAY NIGHT.

GAP WINDS OF UP TO 20 KNOTS IN THE GULF OF PAPAGAYO REGION WILL 
INCREASE TO 20 TO 25 KT BY EARLY FRIDAY AND CONTINUE THROUGH 
EARLY SATURDAY.

$$
LL