000
AXPZ20 KNHC 011521
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON APR 01 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 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
MONSOON TROUGH 08N83W TO 05N95W. ITCZ 05N95W TO 04N115W TO
05N125W TO 03N140W. SCATTERED MODERATE TO STRONG WITHIN 120
NM OF AXIS FROM 81W TO 88W.

...DISCUSSION...
BROAD UPPER LEVEL RIDGE IS N OF 20N W OF 115W. AN UPPER LEVEL
CYCLONIC CIRCULATION AND ASSOCIATED SURFACE COLD FRONT IS JUST
W OF THE AREA...HOWEVER SOME SCATTERED SHOWERS AND TSTMS ARE
ACROSS THE FAR NW PORTION OF THE DISCUSSION AREA N OF 28N W
OF 137W. A 70-100 KT JETSTREAM ENTERS THE AREA AT 18N140W TO 
28N120W. DENSE MID TO UPPER LEVEL CLOUDS ARE WITHIN 700 NM S
OF THE JETSTREAM.

SURFACE HIGH PRES CENTER AT 28N126 REMAINS STATIONARY AS
WEAKENING COLD FRONT ENTERS THE DISCUSSION AREA LATE TODAY AND
IS DEFLECTED NE BY HIGH PRES RIDGE.
 
LARGE SWELLS...ORIGINALLY GENERATED IN AND DOWNSTREAM OF GULFS OF 
TEHUANTEPEC AND PAPAGAYO...HAVE PROPAGATED W AND NOW MIX WITH LONG
PERIOD NW SWELL. NE TRADE WINDS EXPECTED TO INCREASE ACROSS BASIN
WITH SEAS TO 10 FT IN MIXED E AND NW SWELL. 

$$

DGS