000
AXPZ20 KNHC 071459
TWDEP 

TROPICAL WEATHER DISCUSSION                                     
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 UTC TUE APR 07 2015

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. 
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
          
ITCZ FROM 4N93W TO 2N115W TO 5N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 40 NM EITHER SIDE OF AXIS FROM 106W TO 
110W AND WITHIN 80 NM S OF AXIS FROM 116W-123W AND WITHIN 120 NM 
N OF AXIS FROM 117W-119W.

...DISCUSSION... 

AN UPPER LEVEL TROUGH ACROSS THE NW PORTION OF THE AREA EXTENDS 
FROM 32N136W TO 27N133W. AN UPPER LEVEL RIDGE IS BUILDING W OF 
THE TROUGH. A BROAD 75-95 KT JETSTREAM EXTENDS FROM 17N137W TO 
NORTHERN BAJA CALIFORNIA WHERE WINDS INCREASE TO 100 KT. THE JET 
IS ABOUT 700 NM WIDE. ABUNDANT TROPICAL MOISTURE IS BEING 
ADVECTED NORTHEASTWARD S OF THE JET. AN UPPER LEVEL ANTICYCLONIC 
CIRCULATION IS CENTERED IN THE DEEP TROPICS NEAR 7N113W...WITH 
RIDGE NE INTO CENTRAL MEXICO. AN UPPER LEVEL TROUGH WITH AXIS 
FROM HONDURAS TO THE EQUATOR AT 88W. STRONG SUBSIDENCE WITH DRY 
AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF 5N E OF 
105W.

THE SURFACE PRESSURE GRADIENT BETWEEN 1018 HIGH PRES NEAR 
27N124W AND THE ITCZ IS SUPPORTING NORTHEAST TRADE WINDS OF 15 
TO 20 KNOTS GENERALLY IN THE AREA FROM 07N TO 14N W OF 133W. 
SEAS ARE 8-9 FT IN NE SWELL IN THIS AREA.

THE GULF OF TEHUANTEPEC...NLY WINDS 20 TO 25 KT ARE BLOWING 
THROUGH THE GULF OF TEHUANTEPEC WILL DECREASE TO LESS THAN 20 KT 
WED AFTERNOON.
 
THE GULF OF PAPAGAYO...NE WINDS 20 TO 25 KT WITH SEAS 8-9  FT 
WILL CONTINUE THROUGH THU...HOWEVER THE COVERAGE WILL DECREASE. 

$$
DGS