000
AXPZ20 KNHC 050928
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC MON AUG 05 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...SPECIAL FEATURES...                                     
TROPICAL STORM HENRIETTE AT 12.1N 127.9W AT 0900 UTC WITH 
CENTRAL PRES 1002 MB AND MAXIMUM SUSTAINED WIND 45 GUSTS TO 55 
KT MOVING W OR 275 DEGREES AT 6 KT. NUMEROUS MODERATE TO STRONG 
CONVECTION WITHIN 150 NM SW AND 40 NM NE SEMICIRCLES. HENRIETTE 
FORECAST TO INTENSIFY TO HURRICANE TUE AS SYSTEM MOVES W OVER 
WARM SEA SURFACE TEMPERATURES AND FAVORABLE UPPER ENVIRONMENT. 
SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS 
MIATCMEP3/WTNT23 KNHC FOR ADDITIONAL DETAILS.

TROPICAL DEPRESSION GIL AT 13.9N 137.7W AT 0900 UTC CONTINUES TO 
WEAKEN. ITS CENTRAL PRES IS 1007 MB AND MAXIMUM SUSTAINED WIND 
25 GUSTS TO 35 KT MOVING W OR 260 DEGREES AT 6 KT. UPPER LEVEL 
SHEAR HAS INCREASED OVER GIL IS FORECAST TO BECOME A REMNANT LOW 
PRES BY LATER TODAY.  SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION WITHIN 60 NM NW SEMICIRCLE.  SEE LATEST NHC FORECAST/ 
ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP2/WTNT22 KNHC FOR 
ADDITIONAL DETAILS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH FROM 09N83W TO 10N110W TO 12N121W. SCATTERED
MODERATE ISOLATED STRONG WITHIN 300 NM OF AXIS FROM 100W TO 105W.

...DISCUSSION...
NE-SW UPPER LEVEL TROUGH ENTERS EXTREME NW CORNER OF DISCUSSION
AREA FROM 32N131W TO CYCLONIC CIRCULATION NEAR 27N140W. MODERATE 
TO STRONG SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE AND 
UPPER LEVELS COVERS THE AREA N OF 20N W OF 115W. ELONGATED E-W 
UPPER LEVEL RIDGE EXTENDS ALONG 15N-16N WITH ANTICYCLONIC 
CIRCULATIONS OVER TROPICAL STORM HENRIETTE EXTENDING FROM 
15N140W TO 16N115W. TROPICAL STORM HENRIETTE IS FORECAST TO 
INTENSIFY TO HURRICANE BY TUE.    
 
BROAD HIGH PRES SURFACE RIDGE IS N OF 20N W OF 118W. OUTSIDE OF 
THE TROPICAL CYCLONES SURFACE WINDS ACROSS THE AREA ARE 20 KT OR 
LESS AND SEAS ARE LESS THAN 8 FT.

$$
DGS