000
AXPZ20 KNHC 070914
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC THU MAY 07 2009

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 7N77W 5N95W 7N115W 4N140W. SCATTERED STRONG 
CONVECTION WITHIN 90 NM S OF AXIS FROM 86W-91W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 90 NM S OF AXIS FROM 
108W-116W AND WITHIN 60 NM S OF AXIS FROM 124W-127W.

...DISCUSSION...
AN UPPER LEVEL CYCLONIC CIRCULATION IS CENTERED NEAR 25N135W
WITH TROUGH FROM THE CYCLONE TO 16N140W. SCATTERED TO BROKEN
HIGH CLOUDS ARE WITHIN 600 NM NE OF CYCLONIC CIRCULATION. A 
LARGE UPPER LEVEL ANTICYCLONIC CIRCULATION IS CENTERED OVER THE 
CENTRAL BAJA PENINSULA NEAR 27N114W. MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS OF 
THE ATMOSPHERE WITHIN THE ANTICYLONE IS N OF 25N E OF 125W. 
SKIES ARE MOSTLY CLEAR ACROSS THIS AREA EXCEPT FOR BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS ALONG THE COAST OF BAJA CALIFORNIA 
AND OVER THE PACIFIC WATERS.

A LARGE UPPER LEVEL CYCLONIC CIRCULATION IS NEAR 16N112W...WITH
CYCLONIC FLOW COVERING THE AREA S OF 20N BETWEEN 100W-121W.
UPPER LEVEL RIDGE EXTENDS FROM 5N85W TO COSTA RICA AND NICARAGUA 
TO BELIZE. DIFFLUENT FLOW ALOFT IS ENHANCING CONVECTIVE ACTIVITY 
ALONG THE ITCZ BETWEEN 86W-91W.

HIGH PRES RIDGE N OF 10N W OF 105W. THE RIDGE COMBINED WITH LOW 
PRES OVER MEXICO IS PRODUCING BRISK NW WINDS ALONG THE COAST OF 
BAJA CALIFORNIA.

$$
DGS