000
AXPZ20 KNHC 180906
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON DEC 18 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...
THE ITCZ AXIS IS CENTERED ALONG 6N77W 8N85W 9N105W 7N40W. 
SCATTERED MODERATE TO STRONG CONVECTION WITHIN 120 NM N AND 60 
NM S OF THE AXIS FROM 114W TO 120W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 60 NM EITHER SIDE OF THE AXIS FROM 127W 
TO 135W.

...DISCUSSION...
DEEP LAYERED TROUGH EXTENDS OVER THE NW PORTION OF THE AREA WITH 
AXIS FROM 32N120W 19N134W. JET STREAM WITH SW WINDS IS SE OF THE 
TROUGH ALONG 19N127W ACROSS THE CENTRAL BAJA PENINSULA INTO SW 
ARIZONA...WITH WINDS FROM 100-125 KT. A JETSTREAM WITH W-NW WIND 
OF 90-100 KT EXTENDS FROM 21N140W TO 19N127W. MODERATE TO 
STRONG SUBSIDENCE FROM 20N-30N W OF 125W. MID/UPPER LEVEL RIDGE 
IS BUILDING NW OF THE TROUGH. MID/UPPER LEVEL RIDGE EXTENDS FROM 
THE BAY OF CAMPECHE ACROSS GUATEMALA TO 3N91W...SUPPRESSING 
CONVECTION ALONG THE ITCZ IN THIS REGION.

A 1032 MB SURFACE HIGH PRES IS CENTERED NEAR 34N136W WITH RIDGE 
SE TO NEAR 20N113W IS GENERATING STRONG NE WINDS W OF AROUND 
120W. A BROKEN AREA OF STRATOCUMULUS CLOUDS IS WITHIN THE RIDGE.
SURFACE TROUGH ALONG THE ITCZ EXTENDS FROM 14N105W TO 6N108W IS 
NEARLY STATIONARY. ISOLATED MODERATE TO STRONG TSTMS ARE WITHIN 
90 NM E OF THE TROUGH FROM 12N-14N.

$$
DGS