000
AXPZ20 KNHC 081510
TWDEP 

TROPICAL WEATHER DISCUSSION                                      
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1605 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1400 UTC.               
   
...SPECIAL FEATURE...

HURRICANE HILDA IS LOCATED W OF AREA NEAR 13.6N 142.2W 967 MB AT 
1500 UTC AUG 08 MOVING W OR 280 DEG AT 13 KT. MAXIMUM SUSTAINED 
WINDS ARE 100 KT GUSTS 120 KT. TROPICAL STORM FORCE WINDS AND 
WARNING CONDITIONS ARE W OF 140W. FROM 12N TO 16N W OF 139W 
WINDS ARE SOUTHERLY 25 TO 30 KT WITH SEAS 10 TO 12 FT. 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...

.TROPICAL WAVE IS FROM 11N85W TO 2N86W...SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS FROM 03N TO 11N BETWEEN 82W AND 
90W.

.TROPICAL WAVE FROM 17N123W TO 10N124W...SCATTERED MODERATE 
CONVECTION IS FROM 12N TO 18N BETWEEN 120W AND 126W.

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

MONSOON TROUGH AXIS IS FROM 07N90W TO 09N117W. ITCZ AXIS IS FROM 
13N126W TO 12N132W TO 13N136W. SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTION IS FROM 02N TO 08N E OF 81W. SCATTERED 
MODERATE CONVECTION IS FROM 04N TO 10N BETWEEN 95W AND 110W. 

...DISCUSSION...

A BROAD RIDGE EXTENDS SE FROM A 1028 MB SUBTROPICAL HIGH N OF 
THE AREA NEAR 37N158W THROUGH 30N130W TO 21N111W. THE PRESSURE 
GRADIENT BETWEEN THE RIDGE AND HILDA IS SUPPORTING FRESH TO 
STRONG E-NE TRADES IN THE N QUADRANT OF THE HURRICANE TO 19N. 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 E OF 140W 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 110W. THE AREA OF 8 FT SEAS WILL EXPAND 
EASTWARD TO NEAR THE COAST OF SOUTH AMERICA AND NORTHWARD TO 02N 
THROUGH MON.

$$
FORMOSA