Saturday, September 11, 2021

Larry (Now A Powerful Extratropical Storm) Moves Off Into The North Atlantic
























ZCZC MIATCPAT2 ALL
TTAA00 KNHC DDHHMM
 
BULLETIN
Post-Tropical Cyclone Larry Advisory Number  44
NWS National Hurricane Center Miami FL       AL122021
1100 AM AST Sat Sep 11 2021
 
...LARRY IS NOW A POST-TROPICAL CYCLONE OVER THE LABRADOR SEA...
...STILL PRODUCING LARGE SWELLS ACROSS ATLANTIC CANADA AND PORTIONS
OF THE EAST COAST OF THE U.S...
 
SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...54.0N 48.2W
ABOUT 550 MI...880 KM NNE OF CAPE RACE NEWFOUNDLAND
ABOUT 1150 MI...1855 KM WSW OF REYKJAVIK ICELAND
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NNE OR 30 DEGREES AT 48 MPH...78 KM/H
MINIMUM CENTRAL PRESSURE...963 MB...28.44 INCHES
 
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
 
DISCUSSION AND OUTLOOK
----------------------
At 1100 AM AST (1500 UTC), the center of Post-Tropical Cyclone Larry
was located near latitude 54.0 North, longitude 48.2 West. The
post-tropical cyclone is moving toward the north-northeast near 48
mph (78 km/h) and this heading with a decrease in forward speed is 
expected until Larry merges with an extratropical low tonight or 
early Sunday.
 
Maximum sustained winds are near 70 mph (110 km/h) with higher
gusts.  Some slight weakening is possible before Larry merges with 
another extratropical low.
 
Tropical-storm-force winds extend outward up to 310 miles (500 km)
from the center.
 
The estimated minimum central pressure is 963 mb (28.44 inches).
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Larry can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2, WMO header WTNT42 KNHC
and on the web at hurricanes.gov/graphics_at2.shtml?key_messages
 
STORM SURGE:  Water levels will continue to subside in southeastern
Newfoundland today.
 
SURF: Significant swells from Larry will continue affecting portions 
of the east coast of the United States and Atlantic Canada through 
tonight. These swells are likely to cause life-threatening surf and 
rip current conditions.  Please consult products from your local 
weather office.
 
NEXT ADVISORY
-------------
This is the last public advisory issued by the National Hurricane 
Center on Larry.  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 Cangialosi
 
NNNN

Weather summary
for Newfoundland
issued by Environment Canada
at 5:30 p.m. NDT Saturday 11 September 2021.

Discussion.

Hurricane Larry emerged from the tropical Atlantic late last week 
and passed east of Bermuda on Thursday of this week, before 
accelerating northeastward towards Newfoundland. Larry made landfall 
on the western Avalon Peninsula, west of Long Harbour, as a category 
one hurricane around 1:30 A.M. NDT this morning. Larry then quickly 
continued off towards the Labrador Sea where it transitioned into a 
post tropical storm. 

Larry brought strong winds, storm surge, and a short period of 
intense rain to eastern Newfoundland. Impacts included widespread 
power outages with numerous broken trees, power poles and other 
structural damage. Notably, a large outdoor performance tent in St. 
John's suffered extensive damage. Meanwhile, along south and 
southwest facing shorelines of the Burin and Avalon Peninsulas, 
large waves and storm surge caused road washouts and visible damage 
to coastal infrastructure. The tide guage at Argentia broke a record 
that was set on December 25, 1983, with a peak high tide water level 
of 3.65 metres and total storm surge of 1.5 metres. 

The following is a preliminary summary of weather information 
received by Environment and Climate Change Canada as of 5:30 P.M. 
NDT. 

1. Maximum wind gusts in kilometres per hour. 

Cape St. Mary's Lighthouse: 182 * (A) 
Cape Pine Lighthouse: 148 * 
St. John's International Airport: 145 
Cape Race: 144 
Bell Island: 143 * 
Green Island (Fortune Bay): 142 * 
Bay Roberts: 137 * 
Grates Cove: 137 
Long Harbour: 132 * 
Bishop's Cove: 130 * 
Cape Bonavista Lighthouse: 129 * 
Robin Hood Bay (St. John's): 127 * 
St. Mary's: 124 * 
Bonavista: 123 
East White Hills (St. John's): 123 * 
St. John's West: 116 
Salmonier Nature Park: 116 * 
Calpin Cove: 113 * 
St. Lawrence: 95 

(A) Data transmission ceased shortly after midnight at Cape St. 
Mary's. 

2. Rainfall in millimetres. 

Port Rexton: 37.6 * 
Mount Pearl: 35.1 * 
Bonavista: 31.6 
St. Lawrence: 27.5 
Winterland: 26.1 
Harcourt: 25.9 * 
St. John's West: 25.2 
Twillingate: 24.1 
Lethbridge: 23.0 
Salmonier Nature Park: 21.2 * 
St. John's International Airport: 21.0 

3. Summary of storm surge in metres: 

Argentia: storm surge 1.5 (highest tide level 3.65) 
St. Lawrence: storm surge 1.5 (highest tide level 3.64) 
Bonavista: storm surge 0.62 (highest tide level 1.24) 
St. John's: storm surge 0.48 (highest tide level 1.65) 
Port aux Basques: storm surge 0.45 (highest tide level 2.17) 

4. The following areas set a daily maximum temperature record on 
September 10, 2021: 

Daniel's Harbour Area (Daniel's Harbour) 
New record of 25.8 
Old record of 24.4 set in 1948 
Records in this area have been kept since 1946 

Twillingate Area (Twillingate (AUT)) 
New record of 24.4 
Old record of 21.4 set in 2001 
Records in this area have been kept since 1950 

Note: the temperature records reported here have been derived from a 
selection of historical stations in each geographic area that were 
active during the period of record. 

* denotes unofficial observation station.

Please note that this summary may contain preliminary or unofficial 
information and does not constitute a complete or final report.

End/NLWO

ZCZC MIATCUAT2 ALL
TTAA00 KNHC DDHHMM
 
Hurricane Larry Tropical Cyclone Update
NWS National Hurricane Center Miami FL       AL122021
1150 PM AST Fri Sep 10 2021
 
...LARRY MAKES LANDFALL ON NEWFOUNDLAND...
 
Recent satellite, radar and surface data indicate that Larry has 
made landfall in Newfoundland near South East Bight at 1145 PM AST 
(0345 UTC), with maximum sustained winds of 80 mph (130 km/h) and 
an estimated minimum pressure of 960 mb (28.35 inches).

SUMMARY OF 1150 PM AST...0350 UTC...INFORMATION
----------------------------------------------
LOCATION...47.4N 54.5W
ABOUT 85 MI...135 KM WSW OF ST JOHNS NEWFOUNDLAND
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...NNE OR 030 DEGREES AT 47 MPH...76 KM/H
MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES
 
$$
Forecaster Blake
 
NNNN

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