000
AXPZ20 KNHC 141533
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN DEC 14 2008

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0150 UTC.

...ITCZ...
ITCZ IS ALONG 6N77W 7N90W 8N130W 8N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 150 NM N OF AXIS FROM 
108W-111W AND WITHIN 90 NM S OF AXIS FROM 111W-114W.

...DISCUSSION...
LARGE SCALE DEEP LAYER TROUGH WITH AXIS FROM 32N120W TO 17N140W. 
A 80-100 KT JET STREAM EXTENDS FROM 15N133W  ACROSS SOUTHERN 
BAJA CALIFORNIA TO THE BIG BEND OF TEXAS. MODERATE TO STRONG
SUBSIDENCE WITH DRY STABLE AIR IS NW OF THE JET TO 30N. 
BROKEN/OVERCAST MULTILAYERED CLOUDS WITHIN 350 NM SE OF THE JET 
FROM 15N133W TO 23N118W BEING ADVECTED NWD TOWARD MEXICO. 
OTHERWISE BROKEN/OVERCAST STRATOCUMULUS CLOUDS COVER THE AREA N 
OF 17N W OF 115W. BROAD UPPER LEVEL ANTICYCLONIC CIRCULATION 
CENTERED OVER THE NW CARIBBEAN WITH ANTICYCLONIC FLOW N OF 10N E 
OF THE TROUGH. EXCEPT FOR A FEW SHOWERS ALONG THE ITCZ STRONG 
SUBSIDENCE WITH DRY AIR IS S OF 20N E OF 106W.

COLD FRONT EXTENDS FROM THE ARIZONA MEXICO BORDER NEAR 31N112W
TO 27N120W TO 27N130W. A COUPLE OF SURFACE TROUGHS ARE ANALYZED
ALONG THE ITCZ...THE FIRST FROM 8N114W TO 6N116W AND THE SECOND
FROM 10N126W TO 7N125W. NO SIGNIFICANT WEATHER ASSOCIATED WITH
THE FRONT OR TWO TROUGHS.

$$
DGS