000
AXPZ20 KNHC 151546
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN APR 15 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 
1515 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N78W 6N92W 9N106W 7N125W 5N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 4N TO 7N E OF 
80W...FROM 4N TO 11N BETWEEN 92W AND 97W...AND FROM 4N TO 10N 
BETWEEN 115W AND 120W.

...DISCUSSION...

W OF 105W...
A WELL-DEFINED MIDDLE/UPPER LEVEL TROUGH COVERS THE AREA N OF 
25N TO WELL BEYOND 32N E OF 125W INTO NW MEXICO WITH THE AXIS 
ALONG 116W. THE TROUGH IS MOVING E ABOUT 10 KNOTS. FURTHER WEST 
A RIDGE ALOFT COVERS A LARGE AREA FROM N OF 20N W OF 125W TO 
WELL BEYOND 140W. A SMALL UPPER LEVEL CYCLONIC CIRCULATION IS 
CENTERED IN THE VICINITY OF 17.5N137.5W...MOVING W 10 TO 15 
KNOTS. OVER THE DEEP TROPICS FAIRLY STRONG WESTERLIES ALOFT 
COVER THE AREA W OF 125W BECOMING MORE SOUTHWESTERLY BETWEEN 
105W AND 125W. SATELLITE CLOUD DRIFT WIND MEASUREMENTS ARE IN 
THE 50 TO 60 KNOT RANGE.

E OF 105W...
BROAD RIDGING ALOFT COVERS THIS AREA WITH THE CENTER OF THE 
ANTICYCLONE CENTERED IN THE W CENTRAL CARIBBEAN. SATELLITE CLOUD 
DRIFT WINDS IN THIS AREA ARE S TO SE 25 TO 30 KNOTS. A LATE 
SEASON GALE BEGAN IN THE GULF OF TEHUANTEPEC WITHIN THE LAST 
FOUR TO SIX HOURS. A QUIKSCAT PASS AT ABOUT 1240Z INDICATED N 
WINDS OF ABOUT 40 KNOTS. THIS EVENT IS EXPECTED TO BE SHORT 
LIVED WITH GALE CONDITIONS ENDING IN ABOUT 30 HOURS.

$$
CAB