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Eastern Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 012055
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
2205 UTC WED OCT 01 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2030 UTC.

...SPECIAL FEATURES...                                          
TROPICAL DEPRESSION NINETEEN-E IS CENTERED NEAR 17.3N 104.4W AT 
01/2100 UTC OR ABOUT 100 NM S OF MANZANILLO MEXICO AND ABOUT 455 
NM SE OF THE SOUTHERN TIP OF BAJA CALIFORNIA MOVING WNW AT 7 KT. 
ESTIMATED MINIMUM CENTRAL PRESSURE IS 1004 MB. MAXIMUM SUSTAINED 
WIND SPEED IS 25 KT WITH GUSTS TO 35 KT. SCATTERED MODERATE 
CONVECTION IS FROM 14N TO 19N BETWEEN 101W AND 110W. SEE LATEST 
NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP4/WTPZ24 
KNHC FOR MORE DETAILS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
THE MONSOON TROUGH EXTENDS FROM 08N78W TO 09N91W TO 1005 MB LOW 
PRESSURE NEAR 17N104W TO 11N119W TO 12N136W. THE ITCZ EXTENDS 
FROM 12N136W TO 11N140W. ISOLATED MODERATE CONVECTION IS FROM 
04N TO 08N BETWEEN 77W AND 93W...AND FROM 08N TO 12N BETWEEN 
114W AND 131W. SCATTERED MODERATE AND ISOLATED STRONG CONVECTION 
IS FROM 11N TO 16N BETWEEN 95W AND 101W.

...DISCUSSION...                                             
WIND WAVES ASSOCIATED WITH A SUSTAINED FRESH SW MONSOONAL FLOW S 
OF TROPICAL DEPRESSION NINETEEN-E ARE COMBINING WITH LONG PERIOD 
CROSS-EQUATORIAL SW SWELL ALREADY IN PLACE ACROSS THE REGION 
PRODUCING A BROAD AREA OF 8-9 FT SEAS FROM 05N TO 12N BETWEEN 
101W AND 121W. AS TROPICAL DEPRESSION NINETEEN-E TRACKS W-NW... 
THE AREA OF MONSOONAL FLOW WILL SHIFT NORTHWARD AND DECREASE IN 
AREAL COVERAGE THROUGH LATE THURSDAY.

OUTSIDE OF THE INFLUENCE OF TROPICAL DEPRESSION NINETEEN-E... 
WATER VAPOR IMAGERY INDICATES A POSITIVELY TILTED MIDDLE TO 
UPPER LEVEL TROUGH OVER THE WESTERN CONUS WITH A BASE OVER THE 
NORTHERN BAJA CALIFORNIA PENINSULA NEAR 30N116W. THE TROUGHING 
SUPPORTS A COLD FRONT EXTENDING FROM 32N117W SW TO 27N120W TO 
26N130W TO 30N137W. WHILE THE COLD FRONT IS EXPECTED TO BECOME 
DIFFUSE DURING THE NEXT 24 HOURS...NORTHERLY WINDS IN THE RANGE 
OF 10 TO 20 KT ARE ACROSS THE NORTHERN WATERS...WITH SEAS 
MAINTAINING 8 FT GENERALLY N OF 28N BETWEEN 120W AND 135W IN NW 
SWELL. THE AREA OF SEAS IS EXPECTED TO SUBSIDE BY LATE THURSDAY.

LASTLY...WITH THE FRONTAL PASSAGE ACROSS THE NORTHERN AND 
CENTRAL BAJA CALIFORNIA PENINSULA...N-NW WINDS WILL INCREASE TO 
20 TO 25 KT BRIEFLY N OF 28N EARLY THURSDAY THROUGH LATE 
THURSDAY IN THE GULF OF CALIFORNIA AS HIGH PRESSURE BUILDS IN 
ACROSS THE NE WATERS AND THE PRESSURE GRADIENT STRENGTHENS.

$$
HUFFMAN

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Page last modified: Wednesday, 01-Oct-2014 20:55:50 UTC