000
AXPZ20 KNHC 280900
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU DEC 28 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 4N78W 8N90W 6N110W 7N140W.
SCATTERED MODERATE WITHIN 45 NM EITHER SIDE OF AXIS FROM 127W TO 
138W.

...DISCUSSION...
PATTERN HAS BECOME MORE AMPLIFIED WITH SHARP MID/UPPER LEVEL 
RIDGE WITH AXIS FROM 32N136W TO 16N140W. A LARGE AREA OF 
SUBSIDENCE AND ASSOCIATED DRY AIR AT THE MID/UPPER LEVELS OF THE 
ATMOSPHERE WITH THE RIDGE IS N OF 16N W OF 125W. AN UPPER LEVEL 
TROUGH EXTENDS FROM ARIZONA ACROSS THE GULF OF CALIFORNIA INTO 
THE PACIFIC NEAR 15N112W. A 95-115 KT JETSTREAM IS ON THE W SIDE 
OF THE TROUGH AXIS FROM 32N120W TO THE SOUTHERN BAJA PENINSULA.
AT THE SURFACE A DISSIPATING COLD FRONT EXTENDS FROM SE ARIZONA 
ACROSS NW MEXICO CENTRAL BAJA CALIFORNIA TO 24N120W. A LARGE 
FIELD OF STRATOCUMULUS CLOUDS IS BEHIND THE FRONT. AN UPPER 
LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER PANAMA WITH 
RIDGE EXTENDING WWD TO 4N78W...WITH MODERATE TO STRONG 
SUBSIDENCE N OF ITCZ TO  20N W OF 110W.

$$
DGS