000
AXPZ20 KNHC 111503
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI APR 11 2008

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...
ITCZ AXIS IS CENTERED ALONG 5N77W 2N90W 6N105W 3N130W 5N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 50 NM 
EITHER SIDE OF AXIS FROM 105W-115W AND WITHIN 60 NM S OF AXIS 
FROM 135W-139W

...DISCUSSION...
UPPER LEVEL RIDGE COVERS THE FAR W PORTION OF THE DISCUSSION AREA
W OF AROUND 130W. MID/UPPER TROUGH EXTENDS FROM THE SRN PLAINS 
STATES SW INTO THE REGION ACROSS THE CENTRAL BAJA PENINSULA TO A 
CYCLONIC CIRCULATION NEAR 20N126W. MODERATE TO STRONG SUBSIDENCE 
IS LOCATED BETWEEN THE CYCLONIC CIRCULATION AND THE UPPER RIDGE. 
SW WINDS E OF THE UPPER TROUGH IS ADVECTING HIGH LEVEL MOISTURE 
FROM THE DEEP TROPICS NEWD TOWARDS SRN BAJA AND CENTRAL MEXICO. 

BROAD MID/UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA E OF 
100W WITH RIDGE AXIS EXTENDING FROM COLOMBIA ACROSS PANAMA AND 
COSTA RICA TO 10N95W TO 17N105W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY AIR AND MOSTLY CLEAR SKIES IS N OF THE RIDGE AXIS WITH 
A VERY MOIST PATTERN S OF THE RIDGE AXIS SUSTAINING SCATTERED 
SHOWERS AND TSTMS.

A 1009 MB SURFACE LOW IS CENTERED NEAR 9N87W DRIFTING SW. 
SCATTERED SHOWERS AND ISOLATED TSTMS ARE WITHIN 60 NM OF THE 
LOW. SURFACE RIDGE COVERS THE AREA N OF 10N W OF 150W WITH AXIS 
FROM 32N133W 20N115W TO 13N103W. BROKEN/OVERCAST STRATOCUMULUS 
CLOUDS WITH IN THE RIDGE N OF 15N W OF 115W.

$$
DGS