000
AXPZ20 KNHC 211522
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1605 UTC SUN APR 21 2013

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 01200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...              
MONSOON TROUGH 9N84W TO 09N102W. ITCZ 9N102W 5N120W 7N130W TO
4N140W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 220 NM N
AND 150 NM S OF AXIS FROM 114W-124W AND WITHIN 90 NM N OF AXIS
FROM 132W-139W. 

...DISCUSSION...                                                 
UPPER LEVEL CYCLONIC CIRCULATION OVER THE FAR NW PORTION OF THE
DISCUSSION AREA CENTERED NEAR 32N140W WITH TROUGH SE OF THE
CIRCULATION TO 20N130W TO 10N120W. SOME HIGH LEVEL MOISTURE
IS E OF THE TROUGH AXIS N OF 23N BETWEEN 131W-135W. OTHERWISE
MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE
MIDDLE AND UPPER LEVELS N OF 20N W OF 115W. UPPER LEVEL
ANTICYCLONIC CIRCULATION IS CENTERED NEAR 15N102W WITH RIDGE
THE CIRCULATION NW TO 32N126W AND ANOTHER RIDGE EXTENDING
EASTWARD ACROSS CENTRAL AMERICA. A 75-95 KT JETSTREAM FROM
CENTRAL BAJA CALIFORNIA INTO NORTHERN MEXICO.

SURFACE RIDGE IS N OF 15N W OF 115W WITH WINDS ACROSS THE ENTIRE
AREA 20 KT OR LESS. HOWEVER CROSS EQUATORIAL SW SWELL IS S OF 10N
BETWEEN 95W-105W.

$$
DGS