000
AXPZ20 KNHC 300405
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON MAR 30 2009

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 0300 UTC.

...ITCZ...
AXIS IS ALONG 7N81W 2N92W 2N104W 2N112W 4N125W 6N140W. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION FROM 6N-10N BETWEEN 131W AND 
137W.

...DISCUSSION...
MID/UPPER LEVEL TROUGH EXTENDS FROM THE WRN U.S. TO 32N124W TO 
AN ELONGATED UPPER LEVEL CYCLONIC CIRCULATION NEAR 26N135W AND W 
OF THE AREA THROUGH 25N140W. A 90-100 KT JET STREAM IS S OF THE 
TROUGH AXIS FROM 21N140W TO 27N120W WHERE WINDS INCREASE TO 
110-115 KT...THEN CONTINUE TO CENTRAL BAJA CALIFORNIA INTO NW 
MEXICO. BROKEN TO OVERCAST CIRRUS CLOUD ARE WITHIN 400 NM S OF 
THE JET. TRANSVERSE BANDING IS NOTED IN THE CIRRUS CLOUDS W OF 
130W...INDICATING POSSIBLE UPPER LEVEL TURBULENCE. A BROAD UPPER 
LEVEL RIDGE IS E OF THE TROUGH WITH MOSTLY WLY FLOW ALOFT.

IN THE DEEP TROPICS A LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION 
IS CENTERED NEAR 5N107W...WITH ANTICYCLONIC FLOW COVERING THE 
AREA S OF 15N BETWEEN 85W AND 125W. WIDESPREAD STRONG SUBSIDENCE
WITH A DRY STABLE ATMOSPHERE IS S OF 15N E OF 115W. THE 
SUBSIDENCE IS SUPPRESSING CONVECTION ALONG THE ITCZ. W OF 
ANTICYLONE IS AN UPPER LEVEL TROUGH FROM 10N125W TO THE EQUATOR 
AT 131W.

SURFACE RIDGE WITH AXIS ALONG 32N136W TO 20N105W. A SURFACE 
EXTENDS FROM SW ARIZONA THROUGH CENTRAL BAJA CALIFORNIA TO 
24N114W. NO SIGNIFICANT WEATHER IS ASSOCIATED WITH THE TROUGH.

$$
DGS