000
AXPZ20 KNHC 281556
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS 6N78W 7N90W 6N110W 7N140W. SMALL AREA OF SCATTERED MODERATE 
CONVECTION NEAR 7N126W.

...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 JET 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.

$$
MUNDELL