000
AXPZ20 KNHC 132109
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC WED APR 13 2016

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2000 UTC.               

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

A SURFACE TROUGH EXTENDS FROM 07N84W TO 05N94W. ITCZ AXIS IS
FROM 06N95W TO 05N140W. SCATTERED MODERATE CONVECTION IS ALONG
THE TROUGH FROM 02N TO 06N BETWEEN 84W AND 94W. ISOLATED LIGHT
TO MODERATE CONVECTION PREVAILS FROM 03N TO 11N W OF 120W.

...DISCUSSION...   

A 1029 MB HIGH IS CENTERED NEAR 31N137W WITH ITS AXIS EXTENDING
SE TO NEAR 15N104W. THE PRESSURE GRADIENT GENERATED BETWEEN THIS
RIDGE AND LOWER PRESSURES ASSOCIATED WITH THE ITCZ REGION
CONTINUES TO SUPPORT AN AREA OF FRESH TO STRONG TRADE WINDS
BETWEEN 08N AND 22N W OF 120W. THE STRONGEST WINDS PREVAIL FROM
12N TO 17N BETWEEN 127W AND 139W. SEAS ARE RANGING BETWEEN 11 TO
13 FT OVER THE AREA OF HIGHEST WINDS AND SEAS OF 8 TO 10 FT ARE
DEPICTED IN LATEST GUIDANCE AND OBSERVATIONS ELSEWHERE. 

LOOKING AHEAD...A 1031 MB HIGH CURRENTLY OVER THE CENTRAL
PACIFIC NEAR 33N158W WILL SLIDE EAST AND MERGE WITH THE 1028 MB
HIGH BY WED NIGHT. THIS REINFORCING RIDGING WILL BE CENTERED
NEAR 35N141W BY FRI AFTERNOON. THE PRESSURE GRADIENT GENERATED
BETWEEN THIS RIDGE AND A SURFACE LOW PRESSURE THAT WILL MOVE
OVER THE WESTERN US WILL SUPPORT FRESH TO STRONG NW WINDS WITH
SEAS BUILDING TO 18 FT WITHIN THE NEXT 48 HOURS. THE RIDGE WILL
WEAKEN BY THIS WEEKEND RESULTING IN DIMINISHING WINDS AND
SUBSIDING SEAS.
 
$$

ERA