000
AXPZ20 KNHC 070918
TWDEP 

TROPICAL WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU APR 07 2011

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 IS ALONG 7N84W 3N95W 5N115W 3N125W 5N140W. SCATTERED 
MODERATE CONVECTION WITHIN 200 NM N OF AXIS FROM 109W-114W.

...DISCUSSION...
UPPER LEVEL TROUGH HAS MOVED N OF THE AREA WITH NEARLY ZONAL 
FLOW ACROSS THE DISCUSSION AREA N OF 20N W OF 120W...WITH WLY 
WINDS ALOFT 40-70 KT. A BROAD UPPER LEVEL RIDGE IS S OF 20N W OF 
115W. ABUNDANT MIDDLE/UPPER LEVEL MOISTURE FROM CONVECTION W OF 
THE AREA IS MOVING THROUGH THE WESTERN PORTION OF THE  RIDGE.
IN THE DEEP TROPICS AN UPPER LEVEL TROUGH EXTENDS FROM 20N115W 
TO 5N107W. MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR N 
OF 21N BETWEEN 110W-125W. AN E-W UPPER LEVEL RIDGE EXTENDS FROM 
AND ANTICYCLONIC CIRCULATION OVER VENEZUELA TO 10N100W. MIDDLE 
TO UPPER LEVEL MOISTURE FROM PREVIOUS CONVECTIVE ACTIVITY OVER S 
AMERICA IS WITHIN THE RIDGE E OF 95W.

SURFACE RIDGE COVERS THE AREA N OF 15N W OF 115W...WITH NE 
TRADES TO 20 KT CONFINED TO THE NW GENERALLY N OF 20N W OF 130W.
LARGE NW SWELLS UP TO 14 FT ARE ALSO PROPAGATING THROUGH THIS 
AREA. ELY 20 KT WINDS ARE ALSO BLOWING THROUGH GULF OF PAPAGAYO. 
THESE WINDS A EXPECTED TO DECREASE BELOW 20 KT BY SAT.

$$
DGS