000
AXPZ20 KNHC 300407
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC TUE JAN 30 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 3N78W 6N90W 4N110W 4N120W 3N130W 
6N140W. NO SIGNIFICANT CONVECTION IS NOTED.
 
    
...DISCUSSION...

THE REX BLOCK ALONG THE W COAST OF THE U.S. CONTINUES WITH A 
DEEP-LAYERED CUT-OFF LOW CENTERED ABOUT 300 NM WNW OF LOS 
ANGELES CALIFORNIA AND A RIDGE/HIGH OFF THE ALASKAN PANHANDLE. 
BROAD CYCLONIC UPPER FLOW PERSISTS OVER THE SUBTROPICAL WATERS 
ON THE S SIDE OF THE BLOCK WITH THE SUBTROPICAL JET AXIS FROM 
27N140W SEWD TO 24N123W TO ACROSS SRN BAJA AND NEWD INLAND 
NW MEXICO TO SRN TEXAS. THE ASSOCIATED BAND OF MOISTURE/HIGH 
CLOUDINESS EXTENDS SE OF A LINE FROM LA PAZ MEXICO TO 
CHIHUAHUA...RUNNING ACROSS MUCH OF N/CENTRAL MEXICO. A SURFACE
1015 MB LOW ASSOCIATED WITH THE MID/UPPER LOW IS ANALYZED W OF 
SRN CALIFORNIA NEAR 34.5N125W WITH A TROUGH EXTENDING FROM THE 
LOW INTO THE AREA THROUGH 32N119W AND SW TO 27N125.5W. BROKEN TO 
SCATTERED LOW AND MID LEVEL CLOUDS WITH POSSIBLE ISOLATED 
SHOWERS ARE ALONG AND WITHIN 150 NM SE OF THE TROUGH. THIS 
TROUGH HAS RESULTED IN A MOMENTARILY INTERRUPTION IN THE 
NORMALLY STRONG RIDGE/TRADE WIND REGIME. THE OVERALL BLOCKING 
PATTERN IS EXPECTED TO LAST FOR ANOTHER DAY OR SO...BUT THEN 
SHOULD GRADUALLY BREAK FREE AS AN ENORMOUS TROUGH N OF HAWAII 
ERODES THE UPPER RIDGE NEAR ALASKA.

QUIET WEATHER IS IN PLACE ALONG THE COAST FROM ACAPULCO SWD TO 
PANAMA AND COLOMBIA. THE MID-LEVEL RIDGE IS ENTRENCHED FROM THE 
CARIBBEAN WWD ACROSS HONDURAS AND GUATEMALA EXTENDING TO 8N110W
AND THE AREA OF MODERATE/STRONG SUBSIDENCE IS FAR-REACHING E OF 
110W. TO THE W OF THIS RIDGE...A MID/UPPER LEVEL TROUGH EXETNDS
OVER THE ERN PART OF THE REGION FROM CENTRAL BAJA SWD TO 18N114W
TO 13N116W TO WEAK MID/UPPER LEVEL CIRCULATION NEAR 7N115W.

A GALE WARNING FOR THE GULF OF TEHUANTEPEC IS EXPECTED TO LAST
ANOTHER 06 HRS BEFORE DIMINISHING. NLY WINDS TO 20 KT WILL 
CONTINUE OVER THE GULF OF PANAMA FOR ABOUT ANOTHER 36 HRS.
NW WINDS OF 20-25 KT ACROSS THE GULF OF PAPAGAYO ARE EXPECTED
TO DECREASE TO 20 KT IN 24 HRS AND TO LESS THAN 20 KT IN 48 HRS.

$$
AGUIRRE