000
AXPZ20 KNHC 080238
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC MON SEP 8 2014

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 
0200 UTC.

...SPECIAL FEATURE...

AT 0300 UTC SEP 8 TROPICAL STORM NORBERT WAS CENTERED NEAR 27.1N 
117.9W WITH ESTIMATED MINIMUM SEA LEVEL PRESSURE OF 1000 MB. 
NORBERT WAS MOVING NW OR 320 DEG AT 6 KT WITH MAXIMUM SUSTAINED 
WINDS OF 40 KT WITH GUSTS TO 50 KT. NO DEEP CONVECTION REMAINS 
NEAR THE CENTER. NORBERT WILL CONTINUE TO WEAKEN OVER COOLER 
WATER IN A STABLE ENVIRONMENT DURING THE NEXT 12 TO 24 HOURS. 
PLEASE SEE LATEST NHC PUBLIC ADVISORY UNDER AWIPS/WMO HEADERS 
MIATCPEP4/WTPZ34 KNHC AND THE FORECAST/ADVISORY UNDER AWIPS/WMO 
HEADERS MIATCMEP4/WTPZ245 KNHC FOR MORE DETAILS. 

...TROPICAL WAVES...

TROPICAL WAVE ALONG 94W N OF 12N IS MOVING W AT 15 KT. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION W OF THE WAVE AXIS FROM 13N 
TO 16N BETWEEN 94W AND 98W. INTERACTION OF THIS WAVE WITH THE 
MONSOON TROUGH DURING THE NEXT 3-5 DAYS MAY TRIGGER DEVELOPMENT 
OF A TROPICAL CYCLONE. PLEASE REFER TO THE LATEST EAST PACIFIC 
TROPICAL WEATHER OUTLOOK FOR FURTHER INFORMATION.  

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 
             
MONSOON TROUGH EXTENDS FROM 09N84W TO 13N100W TO 09N111W TO 
13N127W. ITCZ FROM 13N127W TO 10N140W. SCATTERED MODERATE 
ISOLATED STRONG WITHIN 180 NM S AND 90 NM N OF TROUGH W OF 120W. 

...DISCUSSION...

AN UPPER LEVEL ANTICYCLONE CENTERED NE OF T.S. NORBERT NEAR 
39N115W IS DIVERTING MOISTURE FLOW ALOFT SOUTHWARD INTO NW 
MEXICO. THE THREAT OF HEAVY RAIN AND THUNDERSTORMS IN THE 
SOUTHWESTERN U.S. HAS DIMINISHED CONSIDERABLY TODAY.

A WEAK SURFACE RIDGE EXTENDING FROM 33N140W TO 21N125W SUPPORTS 
GENTLE TO MODERATE WINDS N OF THE CONVERGENCE ZONE. SEAS ARE 
GENERALLY 5-7 FT OVER THIS AREA. THE INTERACTION OF A TROPICAL 
WAVE WITH THE MONSOON TROUGH NEAR 94W WILL INDUCE A PERTURBATION 
WITHIN THE MONSOON TROUGH WHICH WILL INCREASE SW MONSOON FLOW 
INTO THE MONSOON TROUGH...AND BUILD SEAS TO 8-9 FT THROUGH MON. 

MUNDELL