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Expires:No;;168821
WTNT35 KNHC 302034
TCPAT5

BULLETIN
Post-Tropical Cyclone Maria Advisory Number  59
NWS National Hurricane Center Miami FL       AL152017
500 PM AST Sat Sep 30 2017

...MARIA NOW AN EXTRATROPICAL LOW...
...THIS IS THE LAST ADVISORY...


SUMMARY OF 500 PM AST...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...42.0N 43.9W
ABOUT 560 MI...895 KM ESE OF CAPE RACE NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...ENE OR 65 DEGREES AT 32 MPH...52 KM/H
MINIMUM CENTRAL PRESSURE...991 MB...29.27 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
At 500 PM AST (2100 UTC), the center of Post-Tropical Cyclone Maria
was located near latitude 42.0 North, longitude 43.9 West. The
post-tropical cyclone is moving toward the east-northeast near
32 mph (52 km/h).  Maria is forecast to continue moving toward
the east-northeast with an increase in forward speed through the
rest of the weekend.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Gradual weakening is forecast, and Maria will likely dissipate on
Monday.

Tropical-storm-force winds extend outward up to 230 miles (370 km)
from the center.

The estimated minimum central pressure is 991 mb (29.27 inches).


HAZARDS AFFECTING LAND
----------------------
None.


NEXT ADVISORY
-------------
This is the last public advisory issued by the National Hurricane
Center on this system.  Additional information on this system can be
found in High Seas Forecasts issued by the National Weather Service,
under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and available
on the Web at http://www.opc.ncep.noaa.gov/shtml/NFDHSFAT1.shtml.

$$
Forecaster Zelinsky



 

More information

Expires:No;;168878
WTNT45 KNHC 302035
TCDAT5

Post-Tropical Cyclone Maria Discussion Number  59
NWS National Hurricane Center Miami FL       AL152017
500 PM AST Sat Sep 30 2017

Active deep convection at the center of Maria appears to have ceased
this morning after the cyclone crossed a sharp SST gradient, and
SSTs below 23 deg C are unlikely to allow persistent convection to
redevelop.  Recent visible satellite imagery and data from a late
arriving ASCAT pass at 1348 UTC indicate the presence of a sharp
wind shift extending from near the center of Maria well to the
northeast, suggesting that the cyclone has acquired frontal
characteristics. Based on this, Maria is now classified as
extratropical, and this is the last advisory.

The earlier ASCAT data was used as the basis for the initial
intensity of 45 kt.  Maria has continued to move quickly toward the
east-northeast, and all of the models indicate that the
post-tropical cyclone will continue on this track for the next day
or two.  Gradual weakening is anticipated until dissipation occurs
within a larger frontal zone over the North Atlantic in about 48
hours.  The NHC forecast incorporates guidance from NOAA's Ocean
Prediction Center.


FORECAST POSITIONS AND MAX WINDS

INIT  30/2100Z 42.0N  43.9W   45 KT  50 MPH...POST-TROPICAL
 12H  01/0600Z 43.8N  39.0W   45 KT  50 MPH...POST-TROP/EXTRATROP
 24H  01/1800Z 46.4N  31.4W   40 KT  45 MPH...POST-TROP/EXTRATROP
 36H  02/0600Z 48.9N  23.0W   35 KT  40 MPH...POST-TROP/EXTRATROP
 48H  02/1800Z...DISSIPATED

$$
Forecaster Zelinsky



 
	

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