000
AXPZ20 KNHC 080917
TWDEP 

TROPICAL WEATHER DISCUSSION      
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE MAY 08 2012

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH IS ALONG 6N78W 10N100W 8N107W. ITCZ FROM 8N107W 
9N120W 5N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION 
WITHIN 90 NM N OF AXIS FROM 121W-124W.

...DISCUSSION...
AN UPPER LEVEL RIDGE IS ACROSS THE NW PORTION OF THE DISCUSSION 
AREA N OF 15N W OF 125W. DOWNSTREAM UPPER LEVEL TROUGH EXTENDS 
FROM A CYCLONIC CIRCULATION OVER WESTERN ARIZONA ACROSS THE 
NORTHERN BAJA CALIFORNIA PENINSULA TO 25N120W. AN 80-90 KT 
JETSTREAM IS SE OF THE TROUGH AXIS FROM 23N119W ACROSS SOUTHERN 
BAJA CALIFORNIA INTO NW MEXICO. EXCEPT FROM A FEW HIGH CLOUDS 
FROM 15N-25N W OF 135W STRONG SUBSIDENCE WITH DRY/STABLE AIR AT 
THE MIDDLE AND UPPER LEVELS IS N OF 15N W OF 110W. OTHERWISE 
BROAD UPPER RIDGE DOMINATES THE REMAINDER OF THE DISCUSSION AREA 
WITH AN ANTICYCLONIC CIRCULATION CENTERED NEAR 7N95W.

HIGH PRES LOCATED N OF THE DISCUSSION AREA WITH RIDGE N OF 15N W 
OF 115W. THE PRES GRADIENT BETWEEN THE RIDGE AND LOWER PRES 
ALONG CALIFORNIA AND THE NORTHERN BAJA CALIFORNIA PENINSULA IS 
RESULTING IN AN AREA OF 20 KT NLY WINDS N OF 25N BETWEEN 125W 
AND 135W. THIS WEATHER PATTERN AND CONDITIONS WILL PERSIST 
THROUGH LATE WED. TRADES TO 20 KT ALONG THE SOUTHERN PERIPHERY 
OF THE RIDGE FROM 6N-20N W OF 130W WILL GRADUALLY DIMINISH TO 
LESS THAN 20 KT BY 48 HOURS.

$$
DGS