000
AXPZ20 KNHC 122152
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC MON MAY 12 2008

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 2130 UTC.

...ITCZ...

08N77W 08N82W 10N90W 09N99W 04N104W 05N122W 05N140W. SCATTERED 
MODERATE TO STRONG SHOWERS AND THUNDERSTORMS WITHIN A 30 NM 
RADIUS OF 9N95W...AND FROM 11N TO 12N BETWEEN 102W AND 104W. 
SCATTERED MODERATE SHOWERS TO ISOLATED STRONG THUNDERSTORMS
FROM 9N TO 11N BETWEEN 104W AND 105W...FROM 3N TO 6N BETWEEN 
104W AND 106W...AND FROM 10N TO 11N BETWEEN 108W AND 111W. 
SCATTERED MODERATE TO STRONG SHOWERS AND THUNDERSTORMS IN 
COASTAL PLAINS OF COSTA RICA FROM 8N TO 9N BETWEEN 83W AND 84W. 
NUMEROUS STRONG THUNDERSTORMS IN COASTAL PLAINS FROM GUATEMALA 
TO MEXICO FROM 14N TO 16N BETWEEN 92W AND 93W. ISOLATED MODERATE 
SHOWERS AND POSSIBLE THUNDERSTORMS ARE ELSEWHERE SOUTH OF 12N 
EAST OF 140W.

...DISCUSSION...

THE BASE OF AN INLAND MIDDLE TO UPPER LEVEL TROUGH REACHES 
SOUTHERN CALIFORNIA NEAR 34N118W. A SEPARATE TROUGH STARTS
FROM AN ILL-DEFINED MIDDLE LEVEL CYCLONIC CIRCULATION CENTER 
NEAR 30N120W TO ANOTHER MIDDLE LEVEL CYCLONIC CIRCULATION CENTER 
NEAR 27N126W TO A DEVELOPING CYCLONIC CENTER NEAR 23N138W TO
A MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION CENTER THAT IS THE 
COMPARATIVELY BIGGEST IN AERIAL COVERAGE AND MOST WELL DEVELOPED
NEAR 23N152W. 

BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW COVERS THE AREA
NORTH OF 30N BETWEEN 120W AND 140W.

BROAD UPPER LEVEL ANTICYCLONIC WIND FLOW COVERS THE AREA
NORTH OF 10N EAST OF 105W.
 
AN UPPER LEVEL JET STREAM WITH WINDS RANGING FROM 70 KT 
TO 90 KT IS WITHIN 150 NM ON EITHER SIDE OF THE LINE
THROUGH 15N140W 16N135W 19N127W.

A SURFACE TROUGH IS ALONG 13N97W 10N100W 06N103W 02N103W. 
SCATTERED MODERATE TO STRONG SHOWERS AND THUNDERSTORMS ARE FROM 
11N TO 12N BETWEEN 102W AND 104W. SCATTERED MODERATE SHOWERS TO 
ISOLATED STRONG THUNDERSTORMS ARE FROM 9N TO 11N BETWEEN 104W 
AND 105W...AND FROM 3N TO 6N BETWEEN 104W AND 106W.

A SURFACE TROUGH IS ALONG 123W/125W FROM 4N TO 12N.
NO SIGNIFICANT CONVECTIVE PRECIPITATION IS AROUND THIS TROUGH.

$$
MT