000
AXPZ20 KNHC 250905
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                           
1005 UTC THU JUL 26 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 FLOSSIE IS CENTERED NEAR 15.5N 123.9W AT 0900 UTC 
MOVING WNW AT 13 KT. ESTIMATED MINIMUM CENTRAL PRESSURE IS 1004 
MB. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH GUSTS TO 45 KT. 
NUMEROUS MODERATE TO STRONG CONVECTION WITHIN 210 NM SE 
SEMICIRCLE. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO 
HEADERS MIATCMEP1/WTPZ21 KNHC FOR MORE DETAILS. 

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           

THE MONSOON TROUGH FROM 09N85W TO 07N100W TO 09N110W THEN 
RESUMES AT 10N130W TO TO 11N140W. SCATTERED MODERATE TO STRONG 
FROM 07N TO 10N BETWEEN 123W AND 138W.

...DISCUSSION...                                                

UPPER TROUGH EXTENDS FROM A CYCLONIC CIRCULATION JUST N OF THE 
AREA AT 33N131W TO 23N130W. AN UPPER LEVEL RIDGE IS SW OF THE 
TROUGH FROM 15N-25N W OF 133W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS N OF N OF 
15N W OF 128W. A SMALL UPPER LEVEL ANTICYCLONIC CIRCULATION NEAR 
12N120W HELPING UPPER OUTFLOW WITH TROPICAL STORM FLOSSIE WITH 
STRONG CONVECTION NEAR THE STORM. AN UPPER LEVEL RIDGE EXTENDS 
FROM AN ANTICYCLONIC CIRCULATION OVER THE SW U.S. ACROSS 
NORHTERN BAJA CALIFORNIA TO 22N127W.


EXCEPT FOR THE AREA AROUND TROPICAL DEPRESSION A VERY WEAK 
PRESSURE GRADIENT DOMINATES THE REMAINDER OF THE AREA WITH WINDS 
20 KT OR LESS.

E WINDS OF 15 TO 20 KT ACROSS THE GULF OF PAPAGAYO AND INTO THE 
ADJACENT COASTAL WATERS TO THE WEST. THE WINDS ARE GREATEST 
DURING THE OVERNIGHT AND EARLY MORNING HOURS WITH THE ASSISTANCE 
OF THE NOCTURNAL DRAINAGE FLOW.

CROSS EQUATORIAL S AND SW SWELLS TO 8 FT ARE FORECAST TO MOVE 
INTO THE AREA S OF 03N BETWEEN 105W AND 125W TONIGHT AND SPREAD 
SLOWLY N INTO FRIDAY. 

$$
DGS