000
AXPZ20 KNHC 091534
TWDEP 

TROPICAL WEATHER DISCUSSION                  
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC WED APR 09 2014

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 
1500 UTC. 

...SPECIAL FEATURES...
       
GULF OF TEHUANTEPEC STORM WARNING

A 1026 MB HIGH OVER THE SOUTHERN GULF OF MEXICO HAS TIGHTENED 
THE SURFACE PRESSURE GRADIENT OVER THE GULF OF TEHUANTEPEC. THIS 
HAS PRODUCED STORM FORCE WINDS OVER THE GULF OF TEHUANTEPEC. 
SEAS ARE PRESENTLY 14 TO 23 FT. STORM FORCE WINDS ARE EXPECTED 
TO DECREASE SLIGHTLY TO GALE FORCE WED AFTERNOON...THEN BELOW 
GALE FORCE THU AFTERNOON. 

GULF OF PAPAGAYO GALE WARNING

WINDS ARE FORECAST TO INCREASE TO 20-25 KT THROUGH THE GULF OF 
PAPAGAYO THIS EVENING. WINDS WILL THEN BRIEFLY INCREASE TO GALE 
FORCE EARLY THU MORNING BEFORE DIMINISHING BELOW GALE FORCE THU 
AFTERNOON.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
 
MONSOON TROUGH FROM 7N78W TO 7N85W TO 5N92W. ITCZ FROM 5N92W TO 
6N120W TO 3N140W. NUMEROUS MODERATE TO STRONG CONVECTION WITHIN 
180 NM N OF AXIS FROM 120W-126W. 

...DISCUSSION...                                                

AN UPPER LEVEL CYCLONIC CIRCULATION IS JUST NW OF THE DISCUSSION 
AREA NEAR 31N141W. OTHERWISE AN UPPER LEVEL RIDGE IS ACROSS THE 
W PORTION OF THE AREA AND EXTENDS FROM AN ANTICYCLONIC 
CIRCULATION CENTERED NEAR 5N129W TO CENTRAL BAJA CALIFORNIA. A 
120-125 KT JETSTREAM EXTENDS FROM 25N140W TO 29N132W WHERE WINDS 
DECREASE TO 95-105 KT THEN CONTINUES TO 30N125W. AN UPPER TROUGH 
E OF THE RIDGE WITH AXIS FROM SOUTHERN GULF OF CALIFORNIA NEAR 
24N108W TO THE EQUATOR AT 112W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 
10N BETWEEN THE RIDGE AND THE TROUGH AXIS.

A COLD FRONT EXTENDS FROM 32N139W TO 27N137W TO 23N140W. 
SCATTERED SHOWERS ARE WITHIN 150 NM E OF THE FRONT. S TO SW 
WINDS 20-25 KT WITH SEAS TO 9 FT ARE E OF THE FRONT TO 135W. A 
1010 MB LOW IS FORECAST TO BE NEAR 30N139W THU MORNING. WINDS 
WILL DECREASE TO 20 KT OR LESS AND SEAS WILL BE LESS THAN 8 FT 
THU MORNING.

$$ 
DGS