000
AXPZ20 KNHC 030340
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN FEB 3 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 
0300 UTC.
 
...ITCZ...
ITCZ AXIS ALONG 3N78W 4N110W 5N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
A BROAD LONGWAVE TROUGH ACROSS THE SW UNITED STATES IS BEING SQUEEZED
BY THE POLAR JET DIGGING S ALONG THE PACIFIC COAST. WV IMAGERY SHOWS 
A NARROW BAND OF SUBSIDENCE FROM 25N TO 29N AS THE POLAR JET MERGES 
WITH THE SUBTROPICAL JET NEAR NW BAJA. THE SUBTROPICAL JET LIES JUST 
S OF THE TROUGH WITH DENSE CIRRUS EXTENDING S OF THE JET AXIS. THE 
SUBTROPICAL RIDGE IS FIRMLY IN PLACE ACROSS THE REGION...BUT A COLD 
FRONT IS EXPECTED TO SLIDE DOWN THE CALIFORNIA COAST INTO THE AREA S 
OF 30N SUN NIGHT. A WEAK UPPER LOW IS EVIDENT NEAR 15N111W. DIVERGENT
FLOW E OF THE LOW OVER A WEAK SURFACE TROUGH ALONG 110W IS PRODUCING 
SPOTTY SHOWERS NEAR 11N111W. ZONAL WESTERLY FLOW ALOFT DOMINATES 
CENTRAL AMERICA. AN UNUSUALLY STRONG MID-LEVEL RIDGE OVER THE CENTRAL
CARIBBEAN EXTENDS SW TO 13N110W PRODUCING STRONG SUBSIDENCE S OF 22N.
WINDS OVER THE GULF OF PAPAGAYO WILL OCCASIONALLY BE 20 KT THE NEXT 
48 HRS. SW WINDS WILL INCREASE TO 20 KT IN THE GULF OF CALIFORNIA AS 
THE COLD FRONT APPROACHES.

$$
MUNDELL