000
AXPZ20 KNHC 131518
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1605 UTC MON MAY 13 2013

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH 9N84W TO LOW PRES NEAR 8N93W 1010 MB TO  
10N110W TO 8N120W. ITCZ FROM 8N120W TO 6N140W. NUMEROUS
MODERATE TO STRONG CONVECTION FROM 5N-10N BETWEEN 90W-98W.

...DISCUSSION... 
AN UPPER LEVEL TROUGH ACROSS THE FAR NW PORTION OF THE
DISCUSSION AREA FROM 32N132W TO 28N140W WITH DOWNSTREAM RIDGE
EXTENDING FROM 32N122W TO 21N127W. MODERATE TO STRONG SUBSIDENCE
WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 20N
BETWEEN 115W-130W. AN UPPER LEVEL TROUGH EXTENDS FROM CYCLONIC
CIRCULATION CENTERED OVER THE GULF OF CALIFORNIA NEAR 28N111W
TO 24N124W. A 70-90 KT JETSTREAM FROM THE SOUTHERN TIP OF THE
BAJA PENISULA ACROSS NORTHEN MEXICO. UPPER LEVEL DIFFULENT FLOW
IS ENHANCING CONVECTION ALONG A SURFACE 1010 MB LOW CENTERED
NEAR 8N93W.

THE WEAK LOW EMBEDDED WITHIN THE MONSOON TROUGH NEAR 8N93W IS
INDUCING NLY WINDS TO 30 KT THROUGH THE GULF OF TEHUANTEPEC MON.

A HIGH PRES RIDGE EXTENDS ACROSS NORTHERN PORTION OF AREA N OF 
12N W OF 110W. PRES GRADIENT BETWEEN THE RIDGE AND LOWER PRES
IN THE ITCZ IS MAINTAINING FRESH TRADES N OF THE CONVERGENCE
ZONE TO 15N W OF 135W WITH SEAS TO 8 FT.

ELY WINDS 20-25 KT ARE BLOWING THROUGH THE GULF OF PAPAGAYO
ARE EXPECTED TO CONTINUE THROUGH THE MIDDLE OF THE WEEK.
 
$$
DGS