000
AXPZ20 KNHC 130922
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED DEC 13 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 0000  UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0345 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG...6N77W 7N90W 6N105W 8N118W 6N140W. 
SCATTERED MODERATE ISOLATED STRONG WITHIN 60 NM S OF THE AXIS 
BETWEEN 86W AND 90W AND WITHIN 150 NM S OF THE AXIS FROM 118W TO 
126W AND WITHIN 90 NM EITHER SIDE OF THE AXIS FROM 126W TO 130W.

...DISCUSSION...

MID/UPPER LEVEL TROUGH STRETCHES FROM SW ARIZONA ACROSS THE
NORTHERN BAJA PENINSULA TO 25N125W TO 19N140W. S OF THE 
TROUGH THE FLOW IS RATHER BROAD AND WESTERLY. A SUBTROPICAL JET 
STREAM BRANCH RUNS ENE ALONG THE SOUTHERN PERIPHERY OF THE 
TROUGH...SATELLITE DERIVED WINDS OF 60-90 KT ARE NOTED WITHIN 
300 NM SE OF THE TROUGH E OF 125W. MODERATE TO STRONG SUBSIDENCE 
IS LOCATED FROM 18N TO 26N W OF 105W. MID/UPPER LEVEL 
ANTICYCLONIC CIRCULATION IS LOCATED NEAR 6N128W...WITH RIDGING 
ALONG 7N/8N W OF 100W.

MID/UPPER ANTICYCLONIC FLOW IS OVER THE SW CARIBBEAN EXTENDING 
WESTWARD TO 95W GENERALLY FROM 7N-15N. ITCZ CONVECTION E OF 90W 
IS BEING ENHANCED UNDERNEATH THIS AREA OF ANTICYCLONIC FLOW IN 
COMBINATION WITH WEAK MID TO UPPER LEVEL DIFFLUENT FLOW. 
SATELLITE WATER VAPOR IMAGERY INDICATES MODERATE TO STRONG 
SUBSIDENCE COVERING THE AREA N OF THE ITCZ E OF 110W.

A 1033 MB HIGH PRES IS CENTERED NEAR 29N132W WITH RIDGE SE TO 
14N110W. BROKEN TO OVERCAST STRATUS AND STRATOCUMULUS CLOUDS ARE 
WITHIN THE RIDGE N OF 15N W OF 120W. SURFACE TROUGH IS ANALYZED 
ALONG THE ITCZ FROM 12N119W TO 4N120W.


$$
DGS