000
AXPZ20 KNHC 080302
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
0405 UTC SAT AUG 8 2015

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...

HURRICANE HILDA LOCATED NEAR 13.0N 139.6W AT 0300 UTC WITH 
ESTIMATED CENTRAL PRESSURE OF 975 MB. MAXIMUM SUSTAINED WINDS 90 
KT WITH GUSTS TO 110 KT. THE SYSTEM HAS RAPIDLY DEVELOPED DURING 
THE PAST 6-12 HOURS. VISUAL AND ENHANCED INFRARED SATELLITE 
IMAGERY SHOW A SMALL EYE EMBEDDED WITHIN A COLD CENTRAL DENSE 
OVERCAST. NUMEROUS MODERATE TO STRONG CONVECTION IS WITHIN 90 NM 
OF THE EYE. HILDA IS EXPECTED TO INTENSIFY FURTHER DURING THE 
NEXT 24 HOURS AS IT REMAINS IN A REGION OF LOW VERTICAL WIND 
SHEAR. REFER TO LATEST FORECAST ADVISORIES ISSUED UNDER 
AWIPS/WMO HEADERS MIATCMEP5 AND WTPZ35 FOR MORE DETAILS.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 126W FROM 1010 MB LOW NEAR 13N125W TO 20N 
MOVING W AT 10-15 KT. ASSOCIATED RANDOM CONVECTION LOCATED 
MAINLY E OF WAVE AXIS FROM 13N-16N BETWEEN 115W-123W.

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

MONSOON TROUGH EXTENDS FROM 10N85W TO 08N94W TO 09N105W TO 
08N115W. SCATTERED MODERATE TO STRONG CONVECTION IS WITHIN 120 
NM OF THE TROUGH AXIS BETWEEN 87W-102W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION FROM 13N-17N BETWEEN 118W AND 126W.

...DISCUSSION...

A BROAD RIDGE EXTENDS SE FROM 1027 MB SUBTROPICAL HIGH N OF THE 
AREA THROUGH 27N125W TO 14N107W. THE PRESSURE GRADIENT BETWEEN 
THE RIDGE AND HILDA IS SUPPORTING FRESH TO STRONG E-NE TRADES TO 
360 NM AWAY FROM THE CENTER IN THE N QUADRANT OF THE HURRICANE. 
SCATTEROMETER PASS AT 1800 UTC HELPED DEFINE THIS AREA OF FRESH 
WINDS. AREA OF ENHANCED WINDS AND SEAS N OF HILDA WILL CONTINUE 
TRACKING W ALONG WITH THE TROPICAL CYCLONE...AND MODEL GUIDANCE 
SUGGESTS NEARLY THE ENTIRE FORECAST AREA WILL BE 20 KT OR LESS 
WITH SEAS LESS THAN 8 FT IN ABOUT 36 HOURS BY SUN MORNING.
 
MIXED SE WIND WAVES AND SW SWELL...WITH COMBINED SEAS TO 8 FT IS 
LOCATED JUST S OF THE EQUATOR W OF 110W. THE AREA OF 8 FT SEAS 
WILL EXPAND EASTWARD TO AROUND 85W THROUGH SUN...BUT IS EXPECTED 
TO REMAIN IN THE SOUTHERN HEMISPHERE.

$$
MUNDELL