000
AXPZ20 KNHC 072125
TWDEP 

TROPICAL WEATHER DISCUSSION                                    
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
2205 UTC SUN SEP 7 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...SPECIAL FEATURE...

AT 2100 UTC SEP 7 TROPICAL STORM NORBERT WAS CENTERED NEAR 26.5N 
117.6W WITH ESTIMATED MINIMUM SEA LEVEL PRESSURE OF 997 MB. 
NORBERT WAS MOVING WNW OR 300 DEG AT 7 KT WITH MAXIMUM SUSTAINED 
WINDS OF 45 KT WITH GUSTS TO 55 KT. LATEST SATELLITE IMAGERY 
SHOWS ONLY A SMALL CLUSTER SCATTERED MODERATE CONVECTION WITHIN 
30 NM W OF THE CENTER. NORBERT WILL CONTINUE TO WEAKEN OVER 
COOLER WATER IN A STABLE ENVIRONMENT DURING THE NEXT 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 99W N OF 11N IS MOVING W AT 15 KT. SCATTERED 
MODERATE ISOLATED STRONG CONVECTION E OF THE WAVE AXIS FROM 12N 
TO 15N BETWEEN 93W 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 10N84W TO 14N129W TO 11N134W. ITCZ 
EXTENDS FROM 11N134W TO 09N140W. SCATTERED MODERATE ISOLATED 
STRONG CONVECTION WITHIN 180 NM S AND 60 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.

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 99W 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