000
AXPZ20 KNHC 060252
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
0405 UTC TUE AUG 06 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 HENRIETTE AT 13.5N 130.0W AT 0300 UTC WITH 
MINIMUM CENTRAL PRES 995 MB AND MAXIMUM SUSTAINED WIND 60 GUSTS
TO 75 KT MOVING NW OR 305 DEGREES AT 10 KT.  NUMEROUS MODERATE TO
STRONG CONVECTION WITHIN 180 NM NE AND 90 NM SW SEMICIRCLES. 
HENRIETTE FORECAST TO INTENSIFY TO HURRICANE TONIGHT AS SYSTEM
MOVES W OVER WARM SEA SURFACE TEMPERATURES AND FAVORABLE UPPER
LEVEL ENVIRONMENT. SEE LATEST NHC FORECAST/ADVISORY UNDER 
AWIPS/WMO HEADERS MIATCMEP3/WTNT23 KNHC FOR ADDITIONAL DETAILS.

TROPICAL DEPRESSION GIL AT 13.4N 140.2W AT 0300 UTC WITH MINIMUM
CENTRAL PRES 1006 MB AND MAXIMUM SUSTAINED WIND 30 GUSTS TO 40 KT
MOVING W OR 260 DEGREES AT 8 KT.  SCATTERED MODERATE TO STRONG
CONVECTION WITHIN 120 NM E AND 30 NM W SEMICIRCLES.  GIL FORECAST
TO MOVE W OF AREA TONIGHT AND WEAKEN TO REMNANT LOW TUE.
SEE LATEST NHC FORECAST/ ADVISORY UNDER AWIPS/WMO HEADERS
MIATCMEP2/WTNT22 KNHC FOR ADDITIONAL DETAILS. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH EXTENDS FROM 08N82W TO 08N91W TO 10N110W TO 
14N120W.  SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 60
NM S OF AXIS E OF 102W AND 270 NM N AND 150 NM S OF AXIS FROM 102W
TO 116W.

...DISCUSSION...
WELL DEFINED UPPER LEVEL CYCLONE AT 37N129W AND ITS ATTENDANT
TROUGH MAINTAIN DRY STABLE AIR MASS OVER NW PART OF BASIN N OF 20N
W OF 110W.  BROAD ANTICYCLONE CENTERED AT 17N124W HAS RIDGE ALOFT
EXTENDING TO 115W AND PROVIDE TROPICAL STORM HENRIETTE WITH GOOD
OUTFLOW AND ABUNDANT TROPICAL MOISTURE TO CONTINUE ITS CONVECTION
CYCLE.  MOISTURE EXTENDS ALONG MONSOON TROUGH EASTWARD TO CENTRAL
AMERICA.

SECOND UPPER LEVEL CYCLONE CROSSES THE EXTREME NW CORNER OF BASIN
AND LIFTS NE TUE ALLOWING RIDGE ALOFT TO STRENGTHEN AND EXPAND IN 
COVERAGE THROUGH THU.  THIS MAY DIMINISH SHEARING WINDS ALOFT IN THE
LOWER LATITUDES AND FAVOR DEVELOPING SYSTEMS...SHOULD ANY APPEAR. 

...ELSEWHERE IN THE LOWER LEVELS...
HIGH PRES CENTER 1023 MB NW OF AREA AT 35N142W HAS RIDGE EXTEND
SE INTO E PAC TO 21N113W.  REINFORCING UPPER RIDGE EXPECTED TO
MAINTAIN STABLE AIR MASS OVER LARGE PORTION OF E PAC MAINLY N OF 
18N W OF 110W. 

$$
WALLY BARNES