000
AXPZ20 KNHC 180909
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED FEB 18 2009

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...
AXIS ALONG EQUATOR AT 95W TO 04N125W 03N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...
BROAD MID/UPPER LEVEL TROUGH OVER THE NW PORTION OF THE 
DISCUSSION AREA FROM 32N134W TO 25N140W. A 100-105 KT SW JET 
STREAM EXTENDS FROM 25N128W ACROSS NORTHERN BAJA CALIFORNIA INTO 
SE ARIZONA. SOME HIGH LEVEL MOISTURE SE OF THE JET IS MOVING 
INTO NORTHERN MEXICO. A BROAD MID/UPPER LEVEL RIDGE IS E OF THE 
TROUGH...WITH AXIS FROM A POORLY DEFINED ANTICYCLONIC 
CIRCULATION NEAR 3N93W 15N102 THEN N ACROSS MEXICO. AN UPPER 
LEVEL TROUGH EXTENDS FROM NORTHERN HONDURAS ACROSS NICARAGUA TO 
7N85W. STRONG SUBSIDENCE WITH DRY STABLE AIR COVERS THE AREA S 
OF 20N E OF 115N...WITH MOSTLY CLEAR SKIES ACROSS THIS REGION 
EXCEPT FOR BROKEN LOW LEVEL CLOUDS S OF THE ITCZ.

COLD FRONT FROM 32N133W TO 26N140W. A FEW LIGHT SHOWERS ARE 
ALONG THE FRONT. SURFACE 1022 MB HIGH PRES IS CENTERED NEAR 
28N123W WITH RIDGE FROM THE HIGH CENTER TO 18N110W. BROKEN 
STRATOCUMULUS CLOUDS BLANKET THE AREA N OF 15N W OF 115W.

$$
DGS