000
AXPZ20 KNHC 040300
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
0405 UTC SAT AUG 04 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...SPECIAL FEATURES... 
TROPICAL STORM GIL AT 15.3N 134.3W AT 0300 UTC MOVING W OR 275 
DEGREES AT 8 KT.  ESTIMATED CENTRAL PRES 1001 MB.  MAXIMUM
SUSTAINED WINDS 30 KT GUSTS 40 KT.  NUMEROUS MODERATE TO STRONG
CONVECTION WITHIN 75 NM NW AND 30 NM SE SEMICIRCLES.  LATEST
FORECAST FOR CONTINUED WEAKENING AS GIL MOVES W INTO 
PROGRESSIVELY INCREASING SHEAR AND COOLER WATERS.  SEE LATEST
NHC FORECAST/ ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTNT22
KNHC FOR ADDITIONAL DETAILS.

JUST E OF GIL...TROPICAL DEPRESSION EIGHT-E AT 12.8N 124.4W 
WITH CENTRAL PRES 1008 MB AND MAXIMUM SUSTAINED WIND 30 GUSTS TO
40 KT.  NUMEROUS MODERATE TO STRONG CONVECTION WITHIN 120 NM SE
AND 30 NM NW SEMICIRCLES.  SYSTEM MOVES W OR 270 DEGREES AT 9 KT AND
EXPECTED TO INTENSIFY TO TROPICAL STORM LATE TONIGHT OR EARLY
SUN. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS
MIATCMEP3/WTNT23 KNHC FOR ADDITIONAL DETAILS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH EXTENDS FROM 09N84W TO 10N100W TO 10N91W TO 
10N106W TO 12N120W.  SCATTERED MODERATE CONVECTION WITHIN 210 NM
S OF AXIS FROM 107W TO 122W.

...DISCUSSION...
NE-SW UPPER LEVEL TROUGH ENTERS EXTREME NW CORNER OF E PAC WITH
DRY AIR MASS COVERING BASIN N OF 20N W OF 115W. ELONGATED E-W
RIDGE EXTENDS ALONG 14N-16N WITH ANTICYCLONES OVER T.S GIL AND 
T.D. EIGHT-E AND EXTENDING TO 112W.  SW FLOW OVER GIL EXPECTED
TO INCREASE MAKING ENVIRONMENT ALOFT MORE ADVERSE IN SPITE OF 
HAVING THE BENEFIT OF 28 DEGREE SEA SURFACE TEMPERATURES. AS GIL
WEAKENS...TROPICAL DEPRESSION EIGHT-E IMPROVES ITS OUTFLOW ALOFT
AND INTENSIFIES TO TROPICAL STORM TONIGHT OR EARLY SUN.     
 
...ELSEWHERE AT THE LOWER LEVELS...
WEAKENING BROAD HIGH PRES CENTER 1025 MB N OF AREA AT 38N143W HAS
RIDGE EXTEND SE INTO AREA TO 21N104W.  PREVIOUSLY FRESH NE TRADES
HAVE DIMINISHED TO A MODERATE BREEZE AND SEAS ARE SUBSIDING TO 
LESS THAN 8 FT TONIGHT AS THEY MERGE WITH THE INCOMING SWELL
FROM T.S.GIL. 

$$ 
WALLY BARNES