000
AXPZ20 KNHC 110925
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN FEB 11 2007

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 CENTERED ALONG 1N80W 3N95W 4N120W 4N140W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 90 NM N OF THE AXIS BETWEEN 114W 
125W.

...DISCUSSION...
WEAKENING SHORT WAVE TROUGH MOVING ONTO THE CALIFORNIA COAST 
EXTENDS SW TO 27N126W. ASSOCIATED SURFACE COLD FRONT 32N122W TO
22N134W. BROKEN TO OVERCAST CLOUDS ARE WITHIN 90 NM EITHER SIDE 
OF FRONT WITH SCATTERED SHOWERS. OTHERWISE BROAD MID/UPPER LEVEL 
RIDGE COVERS THE DISCUSSION AREA W OF 115W WITH MOSTLY WLY UPPER 
LEVEL WINDS FLOW. A 120-130 KT JET STREAM ENTERS THE AREA NEAR 
27N140W TO THE CENTRAL BAJA PENINSULA WHERE WINDS DECREASE TO 
80W. MODERATE TO STRONG SUBSIDENCE WITH ASSOCIATED DRY AIR AT 
THE MID AND UPPER LEVELS OF THE ATMOSPHERE FROM THE ITCZ TO 25N 
W OF 110W.

AN UPPER SHORTWAVE TROUGH EXTENDING S THROUGH CENTRAL MEXICO 
ALONG 2498W TO 11N106W. UPPER LEVEL CONFLUENCE BETWEEN THE SW 
FLOW AHEAD OF THIS TROUGH WITH THE SLY FLOW AROUND CARIBBEAN 
RIDGING IS SUPPORTING THE EXTREMELY DRY/STABLE AIR IN THE FAR NE 
PACIFIC...ESPECIALLY FROM 6N TO 18N BETWEEN 100W-82W...WITH THE 
DRIEST UPPER AIR NOTED NEAR NICARAGUA. 

ELSEWHERE AT THE SFC...A PERSISTENT 1019 MB HIGH IS CENTERED 
NEAR 26N119W.

$$
DGS