Tropical Weather Discussion
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000
AXPZ20 KNHC 251503
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 25 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 9N92W TO 7N100N 8N111W TO 5N120W 7N127W TO 6N140W.
NUMEROUS STRONG CONVECTION FROM 3N-8N BETWEEN 128W-140W.

...DISCUSSION...

AN UPPER LEVEL TROUGH WITH AXIS FROM 32N130W TO 26N140W. A 95-
105 KT JETSTREAM SE OF THE TROUGH EXTENDS FROM 23N115W INTO
SOUTHERN BAJA CALIFORNIA TO NORTHERN MEXICO. STRONG SUBSIDENCE
WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF
15N W OF 115W. UPPER LEVEL DIFFLUENCE IS ENHANCING NUMEROUS
STRONG CONVECTION ALONG THE ITCZ FROM 3N-8N BETWEEN 128W-140W.
AN ANTICYCLONIC CIRCULATION IS CENTERED OVER SOUTHERN GUATEMALA
NEAR 14N191W WITH RIDGE SW TO 10N110W.

SURFACE RIDGE IS N OF 15N W OF 108W. THE PRES GRADIENT BETWEEN
THE RIDGE AND THE ITCZ IS SUPPORTING ELY TRADE WINDS 20-25 KT
WITH SEAS 8-10 FT W OF A LINE FROM 24N140W TO 15N115W TO
04N140W. THE WINDS WILL DECREASE TO 20 KT OR LESS TUE...HOWEVER
8-9 FT NW SWELL BE FROM 9N-17N W OF 120W.

$$
DGS



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