000
AXPZ20 KNHC 190826
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED DEC 19 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN
FROM THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.
 
...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS IS CENTERED ALONG 8N82W 
7N95W 9N125W 7N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
UPPER LEVEL TROUGH EXTENDS FROM A CYCLONIC CIRCULATION 
APPROACHING THE SOUTHERN CALIFORNIA COAST TO 32N119W TO 25N128W 
22N140W. MID TO UPPER LEVEL ANTICYLONIC CIRCULATION IS MOVING IN 
NW OF THE TROUGH OVER THE FAR NW PORTION OF THE DISCUSSION AREA. 
95-115 KT JETSTREAM WITH AXIS FROM 20N135W ACROSS THE CENTRAL 
BAJA PENINSULA INTO NORTHEN MEXICO TO SW TEXAS. MID/UPPER LEVEL 
TROPICAL MOISTURE IS BEING ADVECTED WITHIN 500 NM S OF THE JET 
INTO SOUTHERN BAJA CALIFORNIA INTO NORTHERN MEXICO. MODERATE TO 
STRONG SUBSIDENCE IS WITHIN 250 NM N OF THE JET W OF 125W. BROAD 
MID/UPPER LEVEL RIDGE IS E OF THE TROUGH WITH MODERATE TO STRONG 
SUBSIDENCE S OF 20N E OF 115W. THIS DRY AIR IS LIMITING 
CONVECTIVE ACTIVITY ALONG THE ITCZ ACROSS THE E PORTION OF THE 
DISCUSSION AREA.

A 1026 MB SURFACE HIGH IS CENTERED NEAR 26N123W WITH BROAD RIDGE 
COVERING THE AREA N OF 14N W OF 110W.

$$
DGS