Tuesday, June 15, 2021

Bill Becomes Extratropical As He Races Towards Newfoundland



























709 
WTNT32 KNHC 160233
TCPAT2

BULLETIN
Post-Tropical Cyclone Bill Advisory Number   7
NWS National Hurricane Center Miami FL       AL022021
1100 PM AST Tue Jun 15 2021

...BILL BECOMES EXTRATROPICAL...
...THIS IS THE LAST NHC ADVISORY...


SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION
-----------------------------------------------
LOCATION...43.5N 57.0W
ABOUT 335 MI...540 KM E OF HALIFAX NOVA SCOTIA
ABOUT 290 MI...470 KM SW OF CAPE RACE NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NE OR 35 DEGREES AT 29 MPH...46 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES


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


DISCUSSION AND OUTLOOK
----------------------
At 1100 PM AST (0300 UTC), the center of Post-Tropical Cyclone Bill
was located near latitude 43.5 North, longitude 57.0 West. The
post-tropical cyclone is moving toward the northeast near 29 mph (46
km/h) and this motion is expected to continue through Wednesday.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Weakening is expected, and the post-tropical low is expected to 
dissipate on Wednesday.

Tropical-storm-force winds extend outward up to 105 miles (165 km)
mainly to the southeast of the center.

The estimated minimum central pressure is 1002 mb (29.59 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 
online at ocean.weather.gov/shtml/NFDHSFAT1.php

$$
Forecaster Beven

000
WTNT42 KNHC 160233
TCDAT2

Post-Tropical Cyclone Bill Discussion Number   7
NWS National Hurricane Center Miami FL       AL022021
1100 PM AST Tue Jun 15 2021

Satellite imagery indicates that Bill has become extratropical over 
the north Atlantic. A partial scatterometer overpass showed 35-40 
kt winds to the east-southeast of the center, so the initial 
intensity is lowered to a possibly generous 45 kt.  The 
extratropical low should continue to weaken and move quickly toward 
the northeast until it weakens to a trough between 12-24 h.

This is the last advisory on Bill by the National Hurricane Center. 
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 online at 
ocean.weather.gov/shtml/NFDHSFAT1.php

FORECAST POSITIONS AND MAX WINDS

INIT  16/0300Z 43.5N  57.0W   45 KT  50 MPH...POST-TROP/EXTRATROP
 12H  16/1200Z 46.5N  53.9W   40 KT  45 MPH...POST-TROP/EXTRATROP
 24H  17/0000Z...DISSIPATED

$$
Forecaster Beven

2:53 PM ADT Tuesday 15 June 2021
Tropical cyclone information statement for:

Newfoundland and Labrador:

Burin Peninsula - Southern Avalon
Connaigre
St. John's - Bonavista Peninsula
Terra Nova
Nova Scotia:

Guysborough County
Halifax County - east of Porters Lake
Halifax Metro and Halifax County West
Lunenburg County
Queens County
Richmond County
Shelburne County
Sydney Metro and Cape Breton County
Yarmouth County
For Tropical Storm Bill.

This information statement update for 3:00 PM Tuesday. This is the last planned statement for Tropical Storm Bill.

Tropical Storm Bill formed off the coast of North Carolina Monday morning. The Canadian Hurricane Centre continues to monitor this system, but it is not expected to have any direct impact on Canadian land areas. It is currently about 500 kilometres south of Cape Breton Island.

Bill became better organized earlier today, as indicated by satellite and radar measurements, but is starting to deteriorate. It currently has storm force winds of 90 kilometres per hour. Forecast guidance is indicating possible slow weakening during the next twelve hours as it travels over warm waters before reaching the southeastern Scotian Slope or the southwestern Grand Banks tonight. The system is then expected to continue weakening over offshore Canadian waters before becoming absorbed by a larger non-tropical low pressure system originating from the west. It is expected to become fully absorbed south of Newfoundland during the day on Wednesday, before moving over southeastern Newfoundland.

Please continue to monitor alerts issued by the Canadian Hurricane Centre and forecasts issued by Environment Canada.

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