000
AXPZ20 KNHC 270918
TWDEP 

TWDEP 

TROPICAL WEATHER DISCUSSION                                                                                                            
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC THU FEB 27 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.                           

...SPECIAL FEATURE...

A STRONG COLD FRONT WILL MOVE INTO THE FORECAST AREA THIS 
MORNING. AT 1200 UTC THE FRONT WILL EXTEND FROM 30N137W TO 
24N140W WITH WINDS TO GALE FORCE WITHIN 90 NM E OF THE FRONT. 
THE FRONT WILL RAPIDLY SHIFT EASTWARD WITH MINIMAL GALE FORCE 
WINDS E OF THE FRONT AND GALE FORCE WINDS TO 40 KT EXPECTED N OF 
26N BEHIND THE FRONT TODAY AND TONIGHT. SEAS WILL BUILD AS HIGH 
AS 22 FT IN NW SWELL BY FRI. WINDS WILL DIMINISH BELOW GALE 
FORCE E OF THE FRONT BY LATE TONIGHT...BUT WILL CONTINUE TO 
COVER A PORTION OF THE AREA W OF THE FRONT THROUGH AT LEAST FRI 
EVENING.

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

MONSOON TROUGH EXTENDS FROM 10N85W TO 05N94W TO 05N104W. ITCZ 
EXTENDS FROM 05N104W TO 06N110W TO 03N120W TO 04N140W. NO 
SIGNIFICANT CONVECTION IS NOTED.

...DISCUSSION...

IN THE UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER THE NW 
CORNER N OF 20N W OF 130W. THIS TROUGH IS SUPPORTING THE SPECIAL 
FEATURE STRONG COLD FRONT WITH ASSOCIATED GALE FORCE WINDS. A 
CUT-OFF UPPER LEVEL LOW IS CENTERED OVER THE TROPICS NEAR 
04N123W. A LARGE UPPER LEVEL RIDGE IS OVER THE EASTERN AREA E OF 
110W. STRONG SUBSIDENCE IS OVER MOST OF THE EASTERN PACIFIC S OF 
25N E OF 140W TO INCLUDE MEXICO AND CENTRAL AMERICA. 
 
ON THE SURFACE...THE TAIL END OF A COLD FRONT EXTENDS FROM  
30N123W TO 27N129W AND IS FORECAST TO DISSIPATE IN SIX HOURS. 
THE STRONG COLD FRONT MENTIONED IN THE SPECIAL FEATURE NOW 
EXTENDS FROM 30N140W TO 24N144W TO NEAR THE BIG ISLAND OF 
HAWAII MOVING E.  

GENTLE TO MODERATE TRADES ARE OVER MUCH OF THE NW FORECAST AREA. 
NW SWELLS THAT WERE USHERED IN BY THE FRONTAL BOUNDARY ARE 
MOVING ACROSS THE NW PART OF THE AREA WITH SEAS IN THE 8 TO 14 
FT RANGE FOUND NW OF LINE FROM 30N120W TO 13N140W. THE SWELLS 
WILL CONTINUE TO PROPAGATE SE OVER THE NEXT COUPLE OF DAYS WITH 
SEAS 8 FT OR GREATER COVERING MUCH OF THE FORECAST AREA N OF 08N 
W OF 115W BY FRI AFTERNOON. 

A 1018 MB HIGH IS CENTERED NEAR 26N119W AND IS EXPECTED TO 
REMAIN QUASI-STATIONARY FOR 24 HOURS. 

$$
FORMOSA