000
AXPZ20 KNHC 191338
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON MAY 19 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 1300 UTC.

...TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 91W SOUTH OF 12 MOVING WEST 10 TO 15 KT.
ITCZ SHOWERS AND THUNDERSTORMS ARE NEARBY...AND IT IS NOT EASY
TO KNOW WHICH PRECIPITATION IS WITH THE WAVE AND WHICH
PRECIPITATION IS JUST WITH THE ITCZ.

...THE ITCZ...

06N77W TO 05N80W TO 10N105W TO 10N119W 08N129W TO 05N140W.
SCATTERED TO NUMEROUS STRONG SHOWERS AND THUNDERSTORMS FROM 4N 
TO 7N BETWEEN 78W AND 81W...FROM 9N TO 11N BETWEEN 104W AND 
106W..FROM 7N TO 9N BETWEEN 117W AND 119W...AND FROM 10N TO 11N 
BETWEEN 116W AND 119W. ISOLATED MODERATE SHOWERS AND LOCALLY 
STRONG THUNDERSTORMS FROM 3N TO 10N BETWEEN 84W AND 94W...FROM 
13N TO 17N BETWEEN 98W AND 104W...ELSEWHERE FROM 7N TO 10N 
BETWEEN 105W AND 108W...FROM 9N TO 11N BETWEEN 112W AND 
115W...AND FROM 4N TO 7N BETWEEN 112W
AND 140W.

...DISCUSSION...

A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM A QUASI-STATIONARY 
CYCLONIC CIRCULATION CENTER NEAR 25N139W TO 21N140W AND BEYOND
17N145W. CYCLONIC FLOW COVERS THE AREA NORTH OF 17N WEST OF 130W.

A MIDDLE TO UPPER LEVEL TROUGH EXTENDS FROM A SOUTHERN BAJA 
CALIFORNIA CYCLONIC CIRCULATION CENTER NEAR 23N109W TO 14N112W.
CYCLONIC FLOW IS SURROUNDED BY DRY AIR/SUBSIDENCE NORTH OF 14N
BETWEEN 100W AND 124W.

UPPER LEVEL SOUTH TO SOUTHWEST WIND FLOW IS NORTH OF 06N
BETWEEN 95W AND 110W. BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW
COVERS THE AREA NORTH OF 5N EAST OF 95W...RELATED TO AN UPPER
LEVEL RIDGE OVER CENTRAL AMERICA.

$$
MT