000
AXPZ20 KNHC 182120
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC FRI MAY 18 2007

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 
2100 UTC.

...ITCZ...

INTERTROPICAL CONVERGENCE ZONE IS ALONG THE LINE...7N77W 6N105W 
10N125W 8N140W. SCATTERED MODERATE CONVECTION IS WITHIN 75 NM OF 
THE POINT 7N85W.  SCATTERED MODERATE WITH ISOLATED STRONG 
CONVECTION IS WITHIN 90 NM OF THE POINT 8.5N91W. SCATTERED 
MODERATE WITH ISOLATED STRONG CONVECTION IS WITHIN 60 NM OF THE 
POINTS 5.8N93.7W AND 6.6N101.1W.  SCATTERED MODERATE CONVECTION 
IS WITHIN THE AREA FROM 8N TO 11.5N FROM 120W TO 124W.

...DISCUSSION...

MIDDLE AND UPPER LEVEL TROUGH IS NORTH OF A LINE 30N108W 15N140W.
THE AREA IS CLOUD FREE IN THE MIDDLE AND UPPER LEVELS WITH 
OVERCAST STRATOCUMULUS EXCEPT CLEAR SKIES NORTH OF 27N FROM 125W 
TO 131W. UPPER MOISTURE IS ADVECTING OVER MEXICO WITHIN 400 NM S 
OF THE LINE BUT FEW CLOUDS ARE OBSERVED IN THIS MOISTURE PLUME.

REMAINDER OF THE AREA IS COVERED BY MIDDLE AND UPPER LEVEL RIDGE 
WITH LITTLE ASSOCIATED WEATHER.

AT THE SURFACE MODERATE RIDGE IS NORTH OF 15N WEST OF 115W. 
ELSEWHERE WEAK TROUGH IS ANALYZED.

GULF OF TEHUANTEPEC...NLY WINDS OVER LAND ARE SUSTAINED AT 15 TO 
20 KT WITH MINIMAL GALE ENDING AT 24 HOURS.   

$$
LL