000
AXPZ20 KNHC 030836
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON JAN 03 2011

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0900 UTC.

...ITCZ...
FROM 7N77W 8N130W 8N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
AN UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION OVER 
CENTRAL CALIFORNIA TO 32N127W 28N140W. THIS TROUGH ASSOCIATED 
DISSIPATING COLD FRONT THAT EXTENDS FROM  32N117WW 26N125W TO 
25N135W. BROKEN/OVERCAST LOW CLOUDS ARE WITHIN 60 NM NW OF THE 
FRONT. LARGE NW SWELLS ARE PROPAGATING SWD BEHINDS THE FRONT. A 
90 KT JET STREAM SE OF THE TROUGH FROM 29N122W TO NORTHERN BAJA 
CALIFORNIA. BROKEN CIRRUS CLOUDS ARE WITHIN 120 NM S OF THE JET.
IN THE DEEP TROPICS AN UPPER LEVEL TROUGH EXTENDS FROM 16N109W 
TO THE EQUATOR AT 105W. MODERATE TO STRONG SUBSIDENCE WITH DRY 
STABLE AIR AT THEN MID AND UPPER LEVELS IS S OF THE ITCZ E OF 
115W. UPPER LEVEL ANTICYCLONIC FLOW IS S OF 20N W OF 130W.

HIGH PRES BUILDING SWD ACROSS SOUTHERN MEXICO HAS TIGHTENED  THE 
PRES GRADIENT PRODUCING NORTHERLY WINDS TO GALE FORCE IN THE 
GULF OF TEHUANTEPEC. THE WINDS ARE FORECAST TO DECREASE TO BELOW 
GALE FORCE LATER THIS AFTERNOON AND LESS THAN 20 KT LATE TUE.


$$
DGS