000
AXPZ20 KNHC 070906
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC WED AUG 07 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...
HURRICANE HENRIETTE AT 15.6N 133.9W AT 0900 UTC WITH MINIMUM 
CENTRAL PRES 983 MB AND MAXIMUM SUSTAINED WIND 75 GUSTS TO 100 
KT MOVING WNW OR 300 DEGREES AT 9 KT. NUMEROUS STRONG WITHIN 60 
NM NW OF CENTER. SCATTERED MODERATE TO STRONG ELSEWHERE FROM 13N 
TO 17N BETWEEN 131W AND 134W. HENRIETTE FORECAST TO WEAKEN IN 48 
HOURS AS THE SYSTEM MOVES INTO COOLER WATERS AND DRY AIR. SEE 
LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS 
MIATCMEP3/WTNT23 KNHC FOR ADDITIONAL DETAILS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH FROM 8N78W TO 9N90W TO 10N115W TO 12N126W. 
NUMEROUS STRONG CONVECTION WITHIN 60 NM EITHER SIDE AXIS FROM 
79W-80W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 90 NM S 
OF AXIS FROM 88W-98W AND WITHIN 90 NM N OF AXIS FROM 102W-105W 
AND FROM 7N-10N BETWEEN 121W-126W.

...DISCUSSION...
MOSTLY WESTERLY ZONAL FLOW IN THE UPPER LEVELS N OF 25N W OF 
115W WITH WINDS 45-50 KT. UPPER LEVEL RIDGE EXTENDS FROM AN 
ANTICYCLONIC CIRCULATION CENTERED NEAR 20N121W TO CENTRAL BAJA 
CALIFORNIA. MODERATE TO STRONG SUBSIDENCE WITH DRY AND STABLE 
AIR AT THE MIDDLE AND UPPER LEVELS COVERS THE AREA N OF 20N W OF 
110W. ABUNDANT DEEP LAYER TROPICAL MOISTURE IS FROM 5N-15N E OF 
117W.

BROAD SURFACE HIGH PRES RIDGE IS N OF 20N W OF 115W. OUTSIDE OF 
THE TROPICAL CYCLONE SURFACE WINDS ACROSS THE AREA ARE 20 KT OR 
LESS AND SEAS ARE LESS THAN 8 FT.

A SURFACE TROUGH EXTENDS FROM 15N117W TO 8N120W. ISOLATED 
SHOWERS ARE ALONG THE TROUGH.

$$
DGS