ZCZC MIATCPAT4 ALL
TTAA00 KNHC DDHHMM
BULLETIN
TROPICAL STORM CHANTAL INTERMEDIATE ADVISORY NUMBER  21A
NATIONAL WEATHER SERVICE MIAMI FL
7 PM CDT MON AUG 20 2001

...CHANTAL STRENGTHENING...NOW NEARLY A HURRICANE...BUT CENTER ABOUT 
TO MAKE LANDFALL...

A HURRICANE WATCH REMAINS IN EFFECT FROM BELIZE CITY NORTHWARD TO
CANCUN...AND A TROPICAL STORM WARNING REMAINS IN EFFECT FOR ALL OF
COASTAL BELIZE...AND FOR THE EAST COAST OF THE YUCATAN PENINSULA
FROM THE MEXICO/BELIZE BORDER NORTHWARD TO CANCUN.  A TROPICAL STORM
WARNING IS IN EFFECT FOR THE GULF COAST OF THE YUCATAN PENINSULA
FROM PROGRESO TO CARMEN.

AT 7 PM CDT...0000Z...THE CENTER OF TROPICAL STORM CHANTAL WAS
LOCATED NEAR LATITUDE 18.2 NORTH...  LONGITUDE 87.8 WEST OR ABOUT 40
MILES...60 KM...EAST-SOUTHEAST OF CHETUMAL MEXICO...OR VERY NEAR 
AMBERGRIS CAY BELIZE. 

CHANTAL IS MOVING TOWARD THE WEST-NORTHWEST NEAR 14 MPH...22
KM/HR.  ALTHOUGH THE CENTER WILL CROSS THE COAST NEAR THE
MEXICO/BELIZE BORDER WITHIN THE NEXT HOUR OR TWO...MOST OF THE 
HEAVIEST RAINS AND STRONGEST WINDS NORTH AND EAST OF THE CENTER WILL 
NOT MOVE ONSHORE FOR ANOTHER 6 TO 12 HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 70 MPH...115 KM/HR...WITH HIGHER
GUSTS.  NO SIGNIFICANT CHANGE IN STRENGTH IS LIKELY PRIOR TO 
LANDFALL...BUT CHANTAL IS EXPECTED TO WEAKEN AS IT CROSSES THE 
YUCATAN PENINSULA DURING THE NEXT 24 HOURS.

TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 200 MILES ...325 KM
MAINLY NORTH AND EAST OF THE CENTER.

AN AIR FORCE HURRICANE HUNTER AIRCRAFT RECENTLY REPORTED A MINIMUM 
CENTRAL PRESSURE OF 1001 MB...29.56 INCHES.

STORM SURGE FLOODING OF 2 TO 3 FEET...ACCOMPANIED BY BATTERING 
WAVES...IS POSSIBLE NEAR AND NORTH OF WHERE THE CENTER CROSSES THE 
COAST THIS EVENING...AND 1 TO 2 FEET ALONG PORTIONS OF THE GULF 
COAST OF YUCATAN ON TUESDAY.

RAINFALL TOTALS OF 5 TO 8 INCHES...WITH ISOLATED HIGHER
AMOUNTS...ARE POSSIBLE ALONG AND NEAR THE PATH OF CHANTAL.

REPEATING THE 7 PM CDT POSITION...18.2 N...  87.8 W.  MOVEMENT
TOWARD...WEST-NORTHWEST NEAR 14 MPH.  MAXIMUM SUSTAINED WINDS... 
70 MPH.  MINIMUM CENTRAL PRESSURE...1001 MB.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR
PRODUCTS ISSUED BY YOUR LOCAL WEATHER OFFICE.
 
THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT
10 PM CDT.

FORECASTER FRANKLIN
 
NNNN