Low pressure strengthened to about 985 hPa as it tracked from Lake Superior to central Quebec. Ahead of low, a strong low-level jet of about 70 knots was associated with a warm front, while weaker post-frontal winds only spurred 45-50 knots at 850 hPa.
Every event with a place to put it; 10 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BUF wrote it up.
Low pressure strengthened to about 985 hPa as it tracked from Lake Superior to central Quebec. Ahead of low, a strong low-level jet of about 70 knots was associated with a warm front, while weaker post-frontal winds only spurred 45-50 knots at 850 hPa. This drove an odd downsloping wind event in the warm sector. While winds along the Chautauqua Ridge never topped 50 knots at the surface, they did north of the less impressive hills of the Finger Lakes. This resulted in reports of damage in Ontario County. Post cold frontal winds were also marginal, and most of the areas that gusted the strongest in the cold advection behind the cold front were downstream of the still warm Great Lakes. The isallobaric pressure rises and incoming high pressure resulted in a fairly weak seiche on Lake Erie, however it did rise to just over 8 feet in downtown Buffalo. Further along in the cold advection, lake effect snow developed downwind of Lake Erie. This resulted in localized heavy accumulations in Chautauqua County in the higher terrain, including 12.3 inches in Kennedy and 10 inches outside of Jamestown. Peak wind gusts included 59 mph at Rochester Airport, 58 mph at Watertown Airport, 61 mph at Batavia, and 71 mph at Brant.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Buffalo, NY wrote its last area forecast discussion before the first event at Dec 5, 10:40 PM EST, 20 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Buffalo NY 1042 PM EST Sun Dec 5 2021 NYZ013-020-021-070345- Livingston-Cattaraugus-Allegany- 1042 PM EST Sun Dec 5 2021 ...WIND ADVISORY IN EFFECT UNTIL 7 PM EST MONDAY... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ001>003-011-012-070345- Niagara-Orleans-Monroe-Genesee-Wyoming- 1042 PM EST Sun Dec 5 2021 ...WIND ADVISORY IN EFFECT UNTIL 10 PM EST MONDAY... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ004-005-070345- Wayne-Northern Cayuga- 1042 PM EST Sun Dec 5 2021 ...WIND ADVISORY IN EFFECT FROM 10 AM MONDAY TO 1 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of western and north central New York. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ019-085-070345- Chautauqua-Southern Erie- 1042 PM EST Sun Dec 5 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EST MONDAY... ...LAKESHORE FLOOD ADVISORY IN EFFECT FROM 10 AM TO 7 PM EST MONDAY... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Lakeshore Flood Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ010-070345- Northern Erie- 1042 PM EST Sun Dec 5 2021 ...WIND ADVISORY IN EFFECT UNTIL 10 PM EST MONDAY... ...LAKESHORE FLOOD ADVISORY IN EFFECT FROM 10 AM TO 7 PM EST MONDAY... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. Lakeshore Flood Advisory. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ014-070345- Ontario- 1042 PM EST Sun Dec 5 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 7 PM EST MONDAY... This Hazardous Weather Outlook is for portions of western New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ008-070345- Lewis- 1042 PM EST Sun Dec 5 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 10 AM EST MONDAY... This Hazardous Weather Outlook is for portions of central New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Accumulating lake effect snow is possible east of Lake Ontario Monday night into Tuesday, with several inches expected on the Tug Hill Plateau. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ007-070345- Jefferson- 1042 PM EST Sun Dec 5 2021 ...HIGH WIND WARNING IN EFFECT UNTIL 1 AM EST TUESDAY... ...LAKESHORE FLOOD WARNING IN EFFECT FROM 4 PM MONDAY TO 4 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of central New York. .DAY ONE...Tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Wind Warning. Lakeshore Flood Warning. Accumulating lake effect snow is possible east of Lake Ontario Monday night into Tuesday, with several inches expected on the Tug Hill Plateau. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf NYZ006-070345- Oswego- 1042 PM EST Sun Dec 5 2021 ...WIND ADVISORY IN EFFECT FROM 10 AM MONDAY TO 1 AM EST TUESDAY... ...LAKESHORE FLOOD WARNING IN EFFECT FROM 4 PM MONDAY TO 4 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of central New York. .DAY ONE...Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. Lakeshore Flood Warning. Accumulating lake effect snow is possible east of Lake Ontario Monday night into Tuesday, with several inches expected on the Tug Hill Plateau. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LEZ020-LOZ030-070345- Upper Niagara River and Buffalo Harbor-Lower Niagara River- 1042 PM EST Sun Dec 5 2021 This Hazardous Weather Outlook is for portions of Lake Erie and Lake Ontario. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LOZ042-062-070345- Lake Ontario nearshore waters from the Niagara River to Hamlin Beach- Lake Ontario open waters from the Niagara River to Hamlin Beach- 1042 PM EST Sun Dec 5 2021 ...GALE WARNING IN EFFECT FROM 1 PM MONDAY TO 1 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of Lake Ontario. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LOZ043>045-063>065-070345- Lake Ontario nearshore waters from Hamlin Beach to Sodus Bay- Lake Ontario nearshore waters from Sodus Bay to Mexico Bay- Lake Ontario nearshore waters from Mexico Bay to the Saint Lawrence River-Lake Ontario open waters from Hamlin Beach to Sodus Bay- Lake Ontario open waters from Sodus Bay to Mexico Bay- Lake Ontario open waters from Mexico Bay to the Saint Lawrence River- 1042 PM EST Sun Dec 5 2021 ...GALE WARNING IN EFFECT FROM 4 PM MONDAY TO 4 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of Lake Ontario. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf LEZ040-041-070345- Lake Erie nearshore waters from Ripley to Dunkirk- Lake Erie nearshore waters from Dunkirk to Buffalo- 1042 PM EST Sun Dec 5 2021 ...GALE WARNING IN EFFECT FROM 10 AM MONDAY TO 1 AM EST TUESDAY... This Hazardous Weather Outlook is for portions of Lake Erie. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf SLZ022-024-070345- Saint Lawrence River from Cape Vincent to Ogdensburg- Saint Lawrence River from Ogdensburg to Saint Regis- 1042 PM EST Sun Dec 5 2021 This Hazardous Weather Outlook is for the New York waters of the Saint Lawrence River. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. This product, along with other watches, warnings, advisories, and statements issued by the National Weather Service office in Buffalo can be found on the internet at http://www.weather.gov/buf
The national radar mosaic for the moment the first event began.
6 high wind, 3 lakeshore flood, 1 lake-effect snow. Local standard time, as filed.
Trees were reported to be downed in Naples and South Bristol.
Sustained winds of 46 mph were reported in Dunkirk. Wind gusts of 64 mph and 59 mph were also reported in Forestville and Fredonia, respectively.
Lake effect snow accumulations of 10 inches in Falconer and 8.2 inches in Jamestown were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2021Every state in 2021This day in weather historyWarnings in New York, December 2021
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 988790, 988791, 988795, 988224, 988225, 988226, 988796, 988792, 988793, 988794.