000
AXPZ20 KNHC 261510
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE APR 26 2011

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 IS ALONG 9N84W 6N95W 00N105W. NO SIGNIFICANT CONVECTION.

...DISCUSSION...
UPPER LEVEL TROUGH OVER THE W PORTION OF THE DISCUSSION AREA 
WITH AXIS FROM 24N140W TO 20N125W. DOWNSTREAM LARGE UPPER LEVEL 
ANTICYCLONIC CIRCULATION IS CENTERED 27N122W. ANTICYCLONIC FLOW 
COVERS THE AREA N OF 23N BETWEEN THE BAJA PENINSULA AND 135W.
VERY LIGHT WINDS ALOFT ASSOCIATED WITH THE TROUGH AND 
ANTICYCLONIC CIRCULATION. MODERATE TO STRONG SUBSIDENCE WITH DRY 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE IS 
FROM 10N-30N W OF 120W AND FROM 15N-30N BETWEEN 105W-120W. A 
BROAD UPPER LEVEL TROUGH EXTENDS FROM NE MEXICO NEAR THE BIG 
BEND OF TEXAS TO THE SOUTHERN TIP OF BAJA CALIFORNIA.

SURFACE RIDGE COVERS THE AREA N OF 10N W OF 113W. THE PRES 
GRADIENT BETWEEN THE RIDGE AND LOW PRES OVER THE SW U.S. IS 
PRODUCING 20-25 KT WINDS NEAR THE COAST OF BAJA CALIFORNIA 
GENERALLY N OF 25N E OF 125W. TRADE WINDS TO 20 KT AROUND THE 
SOUTHERN PERIPHERY OF THE RIDGE FROM 8N-20N W OF 125W. 

SURFACE TROUGH EXTENDS FROM 13N104W TO 8N106W. ISOLATED SHOWERS 
ARE ALONG THE TROUGH AXIS, ANOTHER TROUGH IS ANALYZED S OF THE 
ITCZ FROM 4N90W TO 1N93W. SCATTERED MODERATE CONVECTION IS FROM 
1N-4N BETWEEN 90W-94W.

$$
DGS