000
AXPZ20 KNHC 171503
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT MAR 17 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
ITCZ 6N77W 4N100W 5N110W 3N140W. SCATTERED MODERATE TO STRONG 
WITHIN 120 NM S OF AXIS FROM 106W TO 115W AND 90 NM S OF AXIS 
FROM 121W TO 126W.

...DISCUSSION...
MID TO UPPER LEVEL TROUGH IS APPROACHING THE FAR W PORTION OF 
THE DISCUSSION AREA...N OF 13N W OF 135W. AN UPPER LEVEL RIDGE 
EXTENDS FROM 32N131W TO 18N118W. SW UPPER LEVEL WINDS BETWEEN 
THE TROUGH AND THE RIDGE IS BRINGING HIGH CLOUDS NWD FROM 14N 
TO 25N BETWEEN 125W AND 135W. A MIDDLE TO UPPER LEVEL CYCLONIC 
CIRCULATION CENTER IS MOVING INTO THE CENTRAL BAJA PENINSULA 
NEAR 29N115W AND WILL CONTINUE MOVING NNE INTO THE NORTHERN GULF 
OF CALIFORNIA. AN UPPER LEVEL RIDGE EXTENDS FROM SOUTHERN MEXICO 
TO AN ANTICYCLONIC CIRCULATION NEAR 7N92W. DRY AIR COVERS THE 
AREA N OF THE ITCZ AND E OF 10-5W.

SURFACE RIDGE HAS AXIS ALONG 32N135W TO 16N110W. AN AREA OF 
BROKEN TO OVERCAST LOW CLOUDS N OF 22N W OF BAJA CALIFORNIA TO 
121W.

STRONG HIGH PRES BUILDING INTO THE SOUTHERN GULF OF MEXICO HAS 
TIGHTENED THE GRADIENT OVER SOUTHERN MEXICO WITH GALE FORCE 
WINDS OCCURRING NOW IN THE GULF OF TEHUANTEPEC.

$$
DGS