000
AXPZ20 KNHC 120351
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC SUN AUG 12 2012

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 FEATURE...

TROPICAL STORM HECTOR CENTERED NEAR 18.5N 108.1W AT 12/0300 UTC 
MOVING W NW OR 290 DEG AT 11 KT WITH MAXIMUM SUSTAINED WINDS OF 
35 KT WITH GUSTS TO 45 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 
999 MB. NUMEROUS MODERATE SCATTERED STRONG CONVECTION IS WITHIN 
210 NM SW AND 120 NE SEMICIRCLES. ENVIRONMENTAL CONDITIONS ARE 
FAVORABLE FOR CONTINUED DEVELOPMENT. SEE LATEST NHC 
FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP3/WTPZ23 KNHC 
FOR MORE DETAILS.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH AXIS ALONG COAST OF CENTRAL AMERICA FROM 09N84W 
TO 15N91W TO 18N100W...CONTINUES SW OF HECTOR FROM 15N117W TO 
08N140W. SCATTERED MODERATE CONVECTION WITHIN 180 NM S OF AXIS E 
OF 102W...AND WITHIN 90 NM OF AXIS W OF 127W.

...DISCUSSION...
ANTICYCLONIC FLOW ALOFT OVER NORTHERN MEXICO WITH RIDGE AXIS 
EXTENDING SW TOWARD THE REMNANT LOW OF GILMA. EASTERLY FLOW S OF 
THE ANTICYCLONE PROVIDING FAVORABLE UPPER LEVEL ENVIRONMENT FOR 
TROPICAL STORM HECTOR. AN UPPER TROUGH EXTENDS SW FROM 31N120W TO
21N125W. BROAD ANTICYCLONIC FLOW ALOFT PREVAILS FROM 10N TO 22N 
BETWEEN 90W AND 114W WHILE LARGE SCALE SW LOW LEVEL FLOW S OF 
THE MONSOON TROUGH IS SUPPORTING WIDESPREAD CONVECTION ALONG AND 
JUST SOUTH OF THE CONVERGENCE ZONE AXIS. MODERATE TO FRESH TRADE 
WINDS NORTH OF THE MONSOON TROUGH W OF 130W IS CREATING A BROAD 
CYCLONIC CIRCULATION EMBEDDED WITHIN THE MONSOON TROUGH NEAR 10N 
134W. THIS DISTURBANCE IS EXPECTED TO MOVE ENE ALONG WITH THE 
MONSOON FLOW...WITH LITTLE OR NO CHANGE IN INTENSITY. 

FRESH TO STRONG N WINDS N OF THE AREA ALONG THE CALIFORNIA COAST 
IS PRODUCING N SWELL WITH COMBINED SEAS TO 9 FT N OF 26N BETWEEN 
120W AND 135W. WINDS AND SEAS WILL SLOWLY DIMINISH THROUGH MON.

POST-TROPICAL REMNANT LOW GILMA CONTINUES TO WEAKEN OVER COOLER 
WATER AND IS EXPECTED TO DISSIPATE WITHIN 24-36 HOURS. 

$$
MUNDELL