000
AXPZ20 KNHC 270956
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL                         
1005 UTC THU AUG 27 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 
0815 UTC. 

...SPECIAL FEATURES...

HURRICANE IGNACIO IS CENTERED NEAR 12.6N 138.5W AT 27/0900 UTC 
MOVING WNW OR 290 DEG AT 11 KT. ESTIMATED MINIMUM CENTRAL PRES 
IS 985 MB. MAXIMUM SUSTAINED WIND SPEED HAS INCREASED TO 75 KT 
WITH GUSTS TO 90 KT. LATEST SATELLITE IMAGERY SHOWS THAT IGNACIO 
IS QUICKLY INTENSIFYING AS NOTED IN ITS MUCH IMPROVED CLOUD 
PATTERN...AND IN THE VERY STRONG AND LARGE DEEP BURST OF 
CONVECTION OVER AND AROUND THE CENTER. NUMEROUS STRONG 
CONVECTION IS WITHIN 90 NM OF CENTER. SCATTERED MODERATE TO 
ISOLATED STRONG CONVECTION IS ELSEWHERE FROM 09N TO 16N BETWEEN 
135W AND 141W. A BAND OF SCATTERED MODERATE CONVECTION IS S OF 
THE CENTER FROM 04N TO 08N BETWEEN 132W AND 147W. THE CYCLONE IS 
FORECAST TO STRENGTHEN AS IT MOVES W OF THE DISCUSSION AREA THIS 
EVENING. PLEASE SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO 
HEADERS MIATCMEP2/WTPZ22 KNHC FOR MORE DETAILS.

TROPICAL STORM JIMENA IS CENTERED NEAR 12.3N 116.4W OR ABOUT 725 
NM SSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA AT 27/0900 UTC 
MOVING WNW OR 285 DEG AT 13 KT. ESTIMATED MINIMUM CENTRAL PRES 
IS 1005 MB. MAXIMUM SUSTAINED WIND SPEED IS 35 KT WITH GUSTS TO 
45 KT. THE OVERALL CLOUD PATTERN OF THE STORM HAS BECOME MUCH 
BETTER ORGANIZED IN DEFINITION OVER THE PAST FEW HOURS. 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS FROM 10N TO 
17N BETWEEN 114W AND 120W. SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS ALSO SE OF THE CENTER FROM 07N TO 11N BETWEEN 109W 
AND 114W. THE STORM IS FORECAST TO CONTINUE TO INTENSIFY TO 
HURRICANE STRENGTH FRI NEAR 13N122W PER LATEST NHC ADVISORY. 
PLEASE SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS 
MIATCMEP3/WTPZ23 KNHC FOR MORE DETAILS.
 
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
MONSOON TROUGH AXIS EXTENDS FROM 06N77W TO 09N90W TO 11N112W. 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS FROM 07N TO 
11N BETWEEN 109W TO 114W.  
 
...DISCUSSION... 

HIGH PRESSURE CENTERED N OF THE AREA NEAR 34N129W EXTENDS A 
RIDGE SE TO NEAR 20N112W. OUTSIDE OF HURRICANE IGNACIO AND 
TROPICAL STORM JIMENA...GENTLE TO MODERATE TRADE WINDS ARE NOTED 
ON THE SOUTHERN PERIPHERY OF THE RIDGE. A WEAK COLD JUST NW OF 
THE AREA WILL MOVE ACROSS THE FAR NW WATERS FRI WHILE 
DISSIPATING. LONG PERIOD CROSS EQUATORIAL SW SWELL WITH PERIODS 
IN THE 17-18 SECOND RANGE WILL CONTINUE TO PROPAGATE 
NORTHEASTWARD THROUGH THE S CENTRAL WATERS...AND TOWARDS THE 
MEXICAN AND CENTRAL AMERICAN COASTS THROUGH THU WITH THE 
POSSIBILITY HAZARDOUS SURF CONDITIONS RESULTING ALONG THESE 
COASTS. A DIFFLUENT FLOW PATTERN ALOFT S OF AN UPPER ANTICYCLONE 
NEAR 20N134W IS SUPPORTING CONVECTION.

GAP WINDS...                                                  
GULF OF TEHUANTEPEC...N-NE WINDS OF 20-25 KT ARE FORECAST TO 
AGAIN FUNNEL THROUGH THE GULF TODAY INTO EARLY FRI MORNING...AND 
DIMINISH TO 15-20 KT FRI AFTERNOON. RESULTING SEAS WILL START AT 
8 FT...AND BUILD TO 8-10 FT LATE THU NIGHT THEN SUBSIDE TO 8 FT 
FRI. 

$$
FORMOSA