000
AXPZ20 KNHC 011522
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN FEB 01 2009

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

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS ALONG 4N78W 5N90W 4N140W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
MID/UPPER LEVEL TROUGH WITH AXIS FROM 32N130W TO 25N130W. 
MODERATE TO STRONG SUBSIDENCE IS S OF THE TROUGH FROM 20N-27N W 
OF 132W...WITH SOME HIGH LEVEL MOISTURE IS SE OF THE TROUGH 
FLOWING INTO A DOWNSTREAM RIDGE. THE FLAT RIDGE WITH MOSTLY 
ZONAL FLOW EXTENDS FROM AN ANTICYCLONIC CIRCULATION FROM 3N96W
17N105W THEN ALONG THE COAST OF BAJA CALIFORNIA. A 90-100 KT JET 
STREAM EXTENDS FROM 25N130W TO THE CENTRAL BAJA PENINSULA WHERE 
WINDS INCREASE TO 110-120 KT OVER NORTHERN MEXICO. STRONG 
SUBSIDENCE WITH DRY AIR AT THE MIDDLE AND UPPER LEVELS OF THE 
ATMOSPHERE COVERS THE DISCUSSION AREA S OF 20N E OF 115W. SKIES 
ARE MOSTLY CLEAR ACROSS THIS AREA EXCEPT FOR BROKEN 
STRATOCUMULUS CLOUDS S OF 5N. UPPER LEVEL TROUGH IN THE DEEP 
TROPICS WITH AXIS FROM 11N125W TO THE EQUATOR AT 107W.

SURFACE RIDGE EXTENDS FROM 32N135W TO 20N112W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS BLANKET THE AREA WITHIN THE RIDGE 
N OF 20N W OF 125W. THE RIDGE IN THE GULF OF MEXICO HAS MOVED 
EWD AND THE PRES GRADIENT OVER SOUTHERN MEXICO HAS WEAKEND WITH 
WINDS IN THE GULF OF TEHUANTEPEC HAVE DECREASED TO BELOW GALE 
FORCE.
       
$$
DGS