000
AXPZ20 KNHC 050404
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI JAN 04 2008

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0330 UTC.
 
...ITCZ...

INTERTROPICAL CONVERGENCE ZONE...3N77W 4N85W 4N92W 6N110W
9N128W 6N140W. SCATTERED STRONG FROM 9N TO 10N BETWEEN 129W
AND 131W...AND FROM 8N TO 9N BETWEEN 128W AND 129W. SCATTERED 
MODERATE TO ISOLATED STRONG WITHIN A 15 NM TO 20 NM RADIUS OF 
12N123W. ISOLATED TO WIDELY SCATTERED MODERATE SHOWERS WITHIN
150 NM NORTH OF ITCZ BETWEEN 108W AND 119W.

...DISCUSSION...

A DEEP LAYER TROUGH PASSES THROUGH 32N122W TO TO 27N122W.
THIS IS THE FEATURE THAT HAS BEEN BRINGING WIND...RAIN...AND
SNOW TO THE WESTERN U.S.A. A COLD FRONT PASSES THROUGH 32N130W 
TO 31N140W WITH THE TROUGH. UPPER LEVEL SOUTHWESTERLY WIND FLOW 
IS WITHIN 150 NM ON EITHER SIDE OF 19N140W 21N130W 23N116W. 
UPPER LEVEL ANTICYCLONIC WIND FLOW IS NORTH OF THE 19N140W 
23N116W SOUTHWESTERLY WIND FLOW...WEST OF 130W. MIDDLE TO UPPER 
LEVEL SOUTHWESTERLY WIND FLOW ASSOCIATED WITH AN EAST-TO-WEST 
RIDGE COVERS THE AREA NORTH OF THE EQUATOR TO THE 19N140W 
23N116W LINE WEST OF 110W. 1020 MB HIGH PRESSURE CENTER NEAR 
26N118W IS SHIFTING TOWARD BAJA CALIFORNIA...MAINTAINING 20 KT 
TRADEWINDS TO ITS SOUTH. A LARGE NORTHWESTERLY SWELL CONTINUES 
TO PROPAGATE INTO THE AREA AHEAD OF THE COLD FRONT. 

GAP WINDS...GALE FORCE WINDS NOW ARE BLOWING THROUGH THE GULF
OF TEHUANTEPEC...THE STORM FORCE WINDS HAVE SUBSIDED. GALE FORCE 
WINDS ARE FORECAST TO SUBSIDE AFTER 24 HOURS. EXPECT THE 
TEHUANTEPEC GAP WINDS TO DIMINISH TO LESS THAN GALE FORCE AS 
SURFACE HIGH PRESSURE TO THE NORTH SHIFTS EASTWARD AND THE WINDS 
VEER MORE SOUTHEASTERLY. GALE FORCE WINDS ARE BLOWING IN THE 
GULF OF PAPAGAYO...AND FORECAST TO BE LESS THAN GALE FORCE DURING
THE NEXT 6 HOURS OR SO. THE EASTERLY WIND FLOW IN THE CARIBBEAN 
SEA WILL NOT SUSTAIN GALE FORCE WINDS IN THE PAPAGAYO AREA
AFTER THE NEXT 6 HOURS OR SO. 

$$
MT