000
AXPZ20 KNHC 190927
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON JAN 19 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 3N79W 6N110W 4N120W 6N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...
UPPER LEVEL RIDGE OVER THE FAR W PORTION OF THE DISCUSSION AREA
WITH AXIS FROM 32N130W TO 17N140W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY STABLE AIR AT THE MID AND UPPER LEVELS OF THE 
ATMOSPHERE COVERS THE AREA S OF 28N W OF 127W. A 90-100 KT JET 
STREAM IS ALONG 28N140W TO 27N130W THEN DECREASES TO 75 KT. 
UPPER LEVEL TROUGH EXTENDS FROM 32N124W TO CYCLONIC CIRCULATION 
NEAR 15N122W CONTINUING TO 5N123W. ISOLATED SHOWERS ARE WITHIN 
420 NM E OF THE TROUGH S OF 27N...OTHERWISE MID TO HIGH LEVEL 
MOISTURE IS BEING ADVECTED NE TOWARD BAJA CALIFORNIA AND WESTERN 
MEXICO. UPPER LEVEL RIDGE EXTENDS FROM COLOMBIA ACROSS CENTRAL 
AMERICA THROUGH CENTRAL MEXICO. DRY STABLE AIR COVERS THE AREA S 
OF 20N E OF 100W.

STATIONARY FRONT FROM 32N136W TO 22N140W...OVERCAST LOW CLOUDS 
ARE WITHIN 200 NM W OF THE FRONT. SURFACE TROUGH EXTENDS FROM 
20N126W TO 1014 MB LOW PRES NEAR 18N118W CONTINUING TO 15N132W.
BROKEN/OVERCAST LOW CLOUDS ARE WITHIN 200 NM N AND 90 NM S OF
THE LOW. A 1023 MB HIGH IS ANALYZED NEAR 31N127W WITH RIDGE FROM 
THE HIGH SE TO 22N15W.

$$
DGS