000
AXPZ20 KNHC 261549
TWDEP 

TROPICAL WEATHER DISCUSSION...CORRECTED
NWS NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC MON MAY 26 2014

CORRECTED SPECIAL FEATURE SECTION

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 
1500 UTC.

...SPECIAL FEATURE... 

HURRICANE AMANDA IS CENTERED NEAR 13.2N 111.6W AT 26/1500 UTC  
MOVING N-NW OR 345 DEG AT 4 KT. ESTIMATED MINIMUM CENTRAL 
PRESSURE IS 949 MB. AFTER HAVING ACHIEVED STATUS OF STRONGEST 
MAY HURRICANE IN THE EASTERN PACIFIC ON RECORD YESTERDAY...ITS 
MAXIMUM SUSTAINED WINDS HAVE DECREASED SLIGHTLY TO 115 KT WITH 
WITH GUSTS TO 140 KT. NUMEROUS STRONG CONVECTION IS NOTED IN 
SATELLITE IMAGERY WITHIN 90 NM N AND 60 NM S SEMICIRCLES OF 
AMANDA. ELSEWHERE...SCATTERED MODERATE TO ISOLATED STRONG 
CONVECTION IS WITHIN 120 NM SE OF LINE FROM 12N110W TO 08N115W. 
THE LATTER ACTIVITY IS ASSOCIATED WITH THE MAIN CURVED BAND.

AMANDA IS FORECAST TO BEGIN TO WEAKEN AT A RAPID RATE LATER 
TODAY...ESPECIALLY IS SIGNIFICANT COLD UPWELLING DEVELOPS BENEATH 
THE SLOW-MOVING HURRICANE. THE CYCLONE IS FORECAST TO GRADUALLY 
WEAKEN TO A MINIMAL HURRICANE BY TUE EVENING...AND TO A TROPICAL 
STORM ON WED MORNING. SEE LATEST NHC FORECAST/ADVISORY UNDER 
AWIPS/WMO HEADERS MIATCMEP1/WTPZ21 KNHC FOR MORE DETAILS.  
  
...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...           
THE MONSOON TROUGH EXTENDS FROM 08N78W TO 07N90W TO 12N104W THEN 
RESUMES W OF AMANDA FROM 10N114W TO 05N133W. THE ITCZ AXIS 
CONTINUES FROM 05N133W TO BEYOND 05N140W. A CLUSTER OF MODERATE 
TO STRONG CONVECTION IS FROM 04N TO 07N E OF 78W TO THE COAST OF 
COLOMBIA. CLUSTERS OF MODERATE TO STRONG CONVECTION ARE FROM 11N 
TO 16N BETWEEN 98W AND 105W. SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTION IS WITHIN 150 NM NE OF LINE FROM 03N100W TO 
07N109W. SIMILAR CONVECTION IS ALSO NOTED FROM 05N TO 11N 
BETWEEN 97W AND 101W. SCATTERED MODERATE CONVECTION IS FROM 06N 
TO 11N BETWEEN 121W AND 125W. 

...DISCUSSION...                                       

AN UPPER ANTICYCLONE MOVING EASTWARD IS CENTERED NEAR 31N130W 
WITH ASSOCIATED DRY AIR PRESENT OVER THE DISCUSSION AREA N OF 
26N TO THE W OF 122W. AN UPPER CYCLONE DRIFTING WESTWARD IS NEAR 
22N125W WITH AN UPPER TROUGH EXTENDING SE TO 17N121W. AN UPPER 
RIDGE WITH AXIS ALONG 140W S OF 26N DOMINATES THE WEST PART OF 
THE FORECAST AREA. AN UPPER CYCLONE IS CENTERED OVER NE NEW 
MEXICO WITH AN UPPER TROUGH EXTENDING SW ACROSS NW MEXICO AND 
NORTHERN BAJA CALIFORNIA. DRY ALOFT IN THE WAKE OF THE TROUGH IS 
MAINTAINING STABLE AND FAIR CONDITIONS N OF 25N E OF 122W. BROAD 
ANTICYCLONIC FLOW ALOFT IS OBSERVED TO THE E OF HURRICANE AMANDA 
WITH THE ASSOCIATED MEAN ANTICYCLONE LOCATED AT 13N95W. THIS 
SYSTEM EXTENDS A RIDGE SE TO THE COAST OF COLOMBIA.
 
A 1026 MB SURFACE HIGH CENTERED JUST NW OF THE DISCUSSION AREA 
NEAR 33N142W EXTENDS A RIDGE SE ACROSS THE FORECAST WATERS TO 
NEAR 21N112W PER THE 12 UTC SURFACE ANALYSIS. ANTICYCLONIC 
SURFACE WINDS OF 10-15 KT ARE SEEN PER SCATTEROMETER DATA AROUND 
THE SOUTHERN PERIPHERY OF THIS RIDGE WITH SEAS IN THE 5-7 FT 
RANGE. THE PRES GRADIENT IS EXPECTED TO TIGHTEN NE OF THE RIDGE 
AS AMANDA CONTINUES NORTHWARD. AS A RESULT...EXPECT INCREASING 
WINDS OF 20-25 KT AND BUILDING SEAS OF 8-10 FT ACROSS THE N 
WATERS...PARTICULARLY N OF 28N BETWEEN 121W AND 125W...AND N OF 
27N BETWEEN 125W AND 134W BY WED MORNING. 

$$
GR