000
AXPZ20 KNHC 080903
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC SAT AUG 08 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0800 UTC.               
   
...SPECIAL FEATURE...

HURRICANE HILDA WAS LOCATED JUST W OF THE AREA NEAR 13.3N 140.9W 
AT 0900 UTC WITH ESTIMATED CENTRAL PRESSURE OF 973 MB. MAXIMUM 
SUSTAINED WINDS WERE 90 KT WITH GUSTS TO 110 KT. TROPICAL STORM 
FORCE WINDS EXTENDED OVER FORECAST WATERS WITHIN 60 NM NE AND 70 
NM SE QUADRANTS OF CENTER. NUMEROUS MODERATE TO STRONG 
CONVECTION WAS OVER FORECAST WATERS WITHIN 90 NM E SEMICIRCLE OF 
CENTER. 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 HFOTCMCP5 AND WTPA25 FOR MORE DETAILS.

...TROPICAL WAVES...

A TROPICAL WAVE FROM 18N121W TO 11N124W MOVING W AROUND 5 KT. 
SCATTERED MODERATE CONVECTION WAS WITHIN 180 NM E OF THE WAVE 
FROM 12N-15N.

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

MONSOON TROUGH AXIS WAS ANALYZED FROM 08N78W TO 10N85W TO 07N93W 
TO 08N103W TO 08N112W TO 10N117W. ITCZ AXIS WAS ANALYZED FROM 
14N124W TO 15N134W. SCATTERED MODERATE TO STRONG CONVECTION WAS 
S OF THE AXIS TO 03N BETWEEN 82W-88W AND WITHIN 150 NM S OF 
THE AXIS BETWEEN 78W-81W.

...DISCUSSION...

A BROAD RIDGE EXTENDS SE FROM A 1026 MB SUBTROPICAL HIGH N OF 
THE AREA NEAR 36N146W THROUGH 30N139W TO 14N110W. THE PRESSURE 
GRADIENT BETWEEN THE RIDGE AND HILDA IS SUPPORTING FRESH TO 
STRONG E-NE TRADES IN THE N QUADRANT OF THE HURRICANE TO 21N. AN 
ASCAT PASS AT 0558 UTC HELPED DEFINE THIS AREA OF FRESH WINDS. 
THE AREA OF ENHANCED WINDS AND SEAS N OF HILDA WILL CONTINUE 
TRACKING W ALONG WITH THE TROPICAL CYCLONE...AND MODEL GUIDANCE 
SUGGESTS THE FORECAST AREA WILL SEE 20 KT OR LESS WITH SEAS LESS 
THAN 8 FT IN BY SUN EVENING.
 
MIXED SE WIND WAVES AND SW SWELL...WITH COMBINED SEAS TO 8 FT... 
IS LOCATED S OF 02S W OF 105W. THE AREA OF 8 FT SEAS WILL EXPAND 
EASTWARD TO NEAR THE COAST OF SOUTH AMERICA AND NORTHWARD TO 02N 
THROUGH EARLY MON MORNING.

$$
SCHAUER