000
AXPZ20 KNHC 181019
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED APR 18 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. THE FOLLOWING INFORMATION IS 
BASED ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0845 UTC.

...ITCZ...
AXIS 5N77W  9N109W  5N130W  5N140W. ISOLATED MODERATE WITHIN 180 
NM N OF AXIS FROM 84W TO 103W AND W OF 123W.  SCATTERED MODERATE 
WITHIN 240 NM OF AXIS FROM 103 TO 123W. 

...DISCUSSION...
UPPER TROUGH EXTEND FROM 32N123W TO 10N126W DRIES OUT AREA N OF 
10N W OF 125W.  LARGE AREA OF UPPER LEVEL DIFFLUENCE BETWEEN 
TROUGH AND UPPER RIDGE DOWNSTREAM CAUSING MASSIVE UPLIFT AND 
FLOW OF TROPICAL MOISTURE N OF 5N BETWEEN 106W AND 120W.  WATER 
PLUME NOW ENTERING INLAND N OF CENTRAL MEXICO S OF 10N W OF 
120W.  UPPER ANTICYCLONE AT 14N90W WITH RIDGE CREST EXTENDING NW 
TO 32N103W WILL MAINTAIN ANTICYCLONIC FLOW BRINGING MOISTURE 
INTO GULF OF MEXICO WITHIN NEXT 48 HRS.  OTHERWISE DRY UPPER AIR 
OVER AREA E OF 95W. 

AT THE SURFACE...
HIGH PRES CENTER 1039 MB AT 37N142W HAS RIDGE EXTENDING SE TO 
11N105W.  RIDGE STRENGTH CAUSING LARGE AREA OF STRONG TRADES W 
OF 120W AND WITHIN 24 HRS WILL PRODUCE STRONG NW WINDS ALONG W 
COAST OF BAJA AND IN SEA OF CORTEZ.

$$
WALLY BARNES