000
AXPZ20 KNHC 070906
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU DEC 07 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...

ITCZ AXIS IS CENTERED ALONG...5N77W 6N90W 8N125W 8N140W. 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 120 NM EITHER 
SIDE OF AXIS FROM 116W TO 125W AND WITHIN 90 NM N OF AXIS FROM 
125W TO 130W.

...DISCUSSION...

MID TO UPPER LEVEL RIDGE IS BUILDING ACROSS THE NW PORTION OF 
THE AREA W OF AROUND 130W. AN UPPER LEVEL CYCLONIC CIRCULATION 
IS JUST W OF THE AREA NEAR 17N141W. SLY FLOW AROUND THE 
CIRCULATION IS ADVECTING HIGH LEVEL MOISTURE FROM ITCZ 
CONVECTION INTO THE RIDGE. MID TO UPPER LEVEL TROUGH EXTENDS 
SOUTHERN ARIZONA ACROSS THE NORTHERN BAJA PENINSULA TO 22N121W. 
STRONG UPPER LEVEL SUBSIDENCE WITH DRY AND CLOUD FREE AIR IS 
OBSERVED NW OF THE TROUGH AXIS TO 125W. BROKEN TO OVERCAST MID 
TO UPPER LEVEL CLOUDS ARE E OF THE TROUGH MOVING INTO CENTRAL 
AND SOUTHERN BAJA CALIFORNIA THEN INTO NORTHERN MEXICO. SURFACE 
1025 MB HIGH PRES CENTER IS NEAR 29N128W WITH RIDGE SE TO 
18N110W.

UPPER LEVEL ANTICYCLONIC CIRCULATION IS JUST N OF THE ITCZ NEAR 
11N119W...WITH E TO W RIDGE FROM 10N129W THROUGH THE CIRCULATION 
TO 13N197W. STRONG SUBSIDENCE WITH VERY DRY AIR AT THE MID AND 
UPPER LEVELS OF THE ATMOSPHERE COVERS SOUTHERN MEXICO AND 
CENTRAL AMERICA AND THE PACIFIC S OF 16N W OF 110W.

$$
DGS