000
AXPZ20 KNHC 270907
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED DEC 27 2006

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
AXIS 7N78W 6N100W 7N120W 7N140W. 
SCATTERED MODERATE CONVECTION WITHIN 30 NM EITHER SIDE OF AXIS 
FROM 128W TO 134W.

...DISCUSSION...
UPPER LEVEL RIDGE BUILDING ACROSS THE NW PORTION OF THE AREA N 
OF AROUND 20N W OF 130W. MODERATE TO STRONG SUBSIDENCE IS 
OCCURRING WITHIN THE AREA OF THE RIDGE. UPPER TROUGH...THE 
TRAILING END OF AN UPPER LOW MOVING INTO THE NORTHERN CALIFORNIA 
COAST...IS ALONG 32N123W TO 20N127W. SOME HIGH LEVEL MOISTURE E 
OF THE TROUGH IS MAINLY N OF 29N MOVING INTO THE NORTHERN BAJA 
PENINSULA. MID/UPPER LEVEL RIDGE EXTENDS FROM THE SW U.S. INTO 
THE GULF OF CALIFORNIA WITH AN UPPER TROUGH FROM THE CENTRAL 
GULF OF MEXICO EXTENDS SW ACROSS SRN MEXICO...BRINGING DRY AND 
STABLE AIRMASS ACROSS CENTRAL AMERICA AND THE PACIFIC E OF 
110W...AND SUPPRESSING THE ITCZ CONVECTION ACROSS E OF 110W. 
SURFACE RIDGE WITH AXIS FROM 32N135W TO 20N115W...WITH BROKEN TO 
OVERCAST STRATUS AND STRATOCUMULUS CLOUDS N OF 15N W OF 115W. 
STRONG PRES GRADIENT OVER SOUTHERN MEXICO WILL CONTINUE GALE 
FORCE WINDS IN THE GULF OF TEHUANTEPEC...FOR THE 6-12 HOURS.

$$
DGS