Alert archive / New York / Winter Storm Warnings in 2020

Winter Storm Warning 4, NWS Buffalo, NY

November 30, 2020Cattaraugus County, Chautauqua County, Erie County, New York

NWS Buffalo, NY issued this winter storm warning at Nov 30, 2020, 3:48 AM EST for Cattaraugus County, Chautauqua County, Erie County, New York. It took effect at Dec 1, 2020, 1:00 AM EST. It was in force for 30 hr. 11 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Nov 30, 2020, 3:48 AM EST (08:48 UTC)
In effect from
Dec 1, 2020, 1:00 AM EST
Expired
Dec 2, 2020, 6:46 AM EST
In force
30 hr
Issued by
NWS Buffalo, NY

Counties Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY

The radar

The Buffalo radar (KBUF), 60 km from the middle of the area, began a volume at 08:48 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

TimeReportWhereRemark
Dec 1, 3:55 PM ESTSNOW 4Perrysburg, NY
Dec 1, 4:15 PM ESTSNOW 52 Sw Forestville, NY
Dec 1, 4:50 PM ESTSNOW 3.52 Nnw Elma Center, NY
Dec 1, 6:00 PM ESTSNOW 4.8Jamestown, NY
Dec 1, 8:00 PM ESTSNOW 44 Nw Springville, NY
Dec 2, 12:00 AM ESTSNOW 4.8Springville, NYCOCORAHS STATION NY-ER-195 SPRINGVILLE 0.4 NE.
Dec 2, 2:30 AM ESTSNOW 82 S Fredonia, NY
Dec 2, 5:00 AM ESTSNOW 5.51 Wnw Fredonia, NYCOCORAHS STATION NY-CQ-22 FREDONIA 0.8 WNW.
Dec 2, 6:40 AM ESTSNOW 64 Nw Springville, NY
Dec 2, 6:45 AM ESTSNOW 53 Ese North Boston, NYCOCORAHS STATION NY-ER-65 BOSTON 1.5 NE.
Dec 2, 6:54 AM ESTSNOW 4Franklinville, NYCOCORAHS STATION NY-CT-22 FRANKLINVILLE 0.5 NNE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 8.8 hours before the alert went out and 59 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Buffalo Intl Airport, NY at 00:00Z on 2020-11-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 00:00Z on 2020-11-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 126 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2128 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
126 m²/s²
0-3 km storm-relative helicity
168 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

071 
WWUS41 KBUF 300848
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
348 AM EST Mon Nov 30 2020

NYZ019-020-085-301700-
/O.UPG.KBUF.WS.A.0009.201201T0600Z-201202T2200Z/
/O.NEW.KBUF.WS.W.0004.201201T0600Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
348 AM EST Mon Nov 30 2020

...WINTER STORM WARNING IN EFFECT FROM 1 AM TUESDAY TO 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 15
  inches, with the greatest amounts expected along the Chautauqua
  Ridge and Boston Hills. Winds gusting as high as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...From 1 AM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could become very difficult. The hazardous
  conditions could impact the morning and evening commutes both
  Tuesday and Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

TMA
10 follow-up statements
643 
WWUS41 KBUF 301429
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
929 AM EST Mon Nov 30 2020

NYZ019-020-085-302300-
/O.CON.KBUF.WS.W.0004.201201T0600Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
929 AM EST Mon Nov 30 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TUESDAY TO
1 PM EST WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 15
  inches, with the greatest amounts expected along the Chautauqua
  Ridge and Boston Hills. Winds gusting as high as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...From 1 AM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

Apffel
845 
WWUS41 KBUF 301732
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1232 PM EST Mon Nov 30 2020

NYZ019-020-085-010330-
/O.CON.KBUF.WS.W.0004.201201T0600Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
1232 PM EST Mon Nov 30 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TUESDAY TO
1 PM EST WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 8 to 15
  inches along the Chautauqua Ridge, Boston Hills, and across
  higher terrain with much less accumulation along Interstate 90
  and the immediate lakeshore. Winds gusting as high as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties. 

* WHEN...From 1 AM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-010330-
/O.NEW.KBUF.WW.Y.0024.201201T1800Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
1232 PM EST Mon Nov 30 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 1 PM TUESDAY TO 1 PM
EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.
  Winds gusting as high as 30 mph.

* WHERE...Wyoming county.

* WHEN...From 1 PM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

Apffel
142 
WWUS41 KBUF 010255
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
955 PM EST Mon Nov 30 2020

NYZ019-020-085-011100-
/O.CON.KBUF.WS.W.0004.201201T0600Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
955 PM EST Mon Nov 30 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM 1 AM TUESDAY TO
1 PM EST WEDNESDAY...

* WHAT...Heavy snow expected. Rain and snow will change to snow by
  daybreak on Tuesday. Total snow accumulations of 8 to 15 inches
  along the Chautauqua Ridge, Boston Hills, and across higher
  terrain with 1 to 3 inches of accumulation along Interstate 90 
  and the immediate lakeshore. Winds gusting as high as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...From 1 AM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could be very difficult. The hazardous
  conditions could impact the morning and evening commute on
  Tuesday and the morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-011100-
/O.CON.KBUF.WW.Y.0024.201201T1800Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
955 PM EST Mon Nov 30 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM TUESDAY TO
1 PM EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 
  inches. Winds gusting as high as 30 mph.

* WHERE...Wyoming county.

* WHEN...From 1 PM Tuesday to 1 PM EST Wednesday.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$
JLA
533 
WWUS41 KBUF 010843
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
343 AM EST Tue Dec 1 2020

NYZ019-020-085-011645-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
343 AM EST Tue Dec 1 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 7 to 13
  inches along the Chautauqua Ridge, Boston Hills, and across 
  higher terrain with 2 inches or less of accumulation along 
  Interstate 90 and the immediate lakeshore. Winds gusting as high
  as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...Until 1 PM EST Wednesday.

* IMPACTS...The hazardous conditions could impact the morning and
  evening commute today and the morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-011645-
/O.EXB.KBUF.WW.Y.0024.201202T0100Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
343 AM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO
7 PM EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  on the Tug Hill, and higher terrain with 2 inches or less of
  accumulation across lower elevations. Winds gusting as high as 
  30 mph.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...From 8 PM this evening to 7 PM EST Wednesday.

* IMPACTS...Travel could be difficult. The hazardous conditions 
  could impact the morning or evening commutes on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ012-011645-
/O.CON.KBUF.WW.Y.0024.201201T1800Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
343 AM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 1 PM EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 6 inches,
  with the greatest amounts across the higher terrain. Winds 
  gusting as high as 35 mph.

* WHERE...Wyoming county.

* WHEN...From 1 PM this afternoon to 1 PM EST Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the evening commute today and the 
  morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

TMA
533 
WWUS41 KBUF 011447
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
947 AM EST Tue Dec 1 2020

NYZ019-020-085-012300-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
947 AM EST Tue Dec 1 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow. Total snow accumulations of 7 to 13 inches 
  along the Chautauqua Ridge, Boston Hills, and across higher 
  terrain with 2 inches or less of accumulation along Interstate 
  90 and the immediate lakeshore. Winds gusting as high as 35 mph.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.
  Greatest accumulations across higher terrain.

* WHEN...Until 1 PM EST Wednesday. Heaviest snow will occur from
  late this afternoon through early Wednesday morning.

* IMPACTS...The hazardous conditions could impact the evening
  commute today and the morning commute on Wednesday. Roads will
  be snow covered and very slippery. Visibility will be poor at
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-012300-
/O.CON.KBUF.WW.Y.0024.201201T1800Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
947 AM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 1 PM EST WEDNESDAY...

* WHAT...Snow. Total snow accumulations of 2 to 6 inches, with 
  the greatest amounts across the higher terrain. Winds gusting as
  high as 35 mph.

* WHERE...Wyoming county. Greatest accumulations across the higher
  terrain.

* WHEN...From 1 PM this afternoon to 1 PM EST Wednesday. The
  majority of the snow will accumulate from late this afternoon
  through early Wednesday morning.

* IMPACTS...Plan on snow covered and slippery road conditions with
  reduced visibility at times. The hazardous conditions could 
  impact the evening commute today and the morning commute on 
  Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-012300-
/O.CON.KBUF.WW.Y.0024.201202T0100Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
947 AM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS
EVENING TO 7 PM EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  on the Tug Hill Plateau, and higher terrain with 2 inches or 
  less of accumulation across lower elevations. Winds gusting as 
  high as 30 mph.

* WHERE...The Eastern Lake Ontario Region. Greatest accumulations
  across the Tug Hill Plateau.

* WHEN...From 8 PM this evening to 7 PM EST Wednesday. The
  majority of the snow accumulation will be very late tonight
  through Wednesday.

* IMPACTS...Travel could be difficult at times with snow covered
  roads and reduced visibility. The hazardous conditions could
  impact the morning and evening commutes on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

Hitchcock
767 
WWUS41 KBUF 012003
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
303 PM EST Tue Dec 1 2020

NYZ019-020-085-020415-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
303 PM EST Tue Dec 1 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow. Total snow accumulations of 7 to 13 inches
  along the Chautauqua Ridge, Boston Hills, and across higher
  terrain with 2 to 4 inches of accumulation along Interstate 90
  and the immediate lakeshore. Winds gusting as high as 40 mph
  will produce some blowing and drifting snow.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties. 
  Greatest accumulations across higher terrain.

* WHEN...Until 1 PM EST Wednesday. Heaviest snow will occur from 
  late this afternoon through early Wednesday morning.

* IMPACTS...The hazardous conditions could impact the evening 
  commute today and the morning commute on Wednesday. Roads will 
  be snow covered and very slippery. Visibility will be poor at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-020415-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
303 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Snow. Total snow accumulations of 3 to 6 inches, with the
  greatest amounts across the higher terrain. Winds gusting as
  high as 40 mph will produce some blowing and drifting snow.

* WHERE...Wyoming county. Greatest accumulations across the 
  higher terrain.

* WHEN...Until 1 PM EST Wednesday. The majority of the snow will 
  accumulate from late this afternoon through early Wednesday 
  morning.

* IMPACTS...Plan on snow covered and slippery road conditions 
  with reduced visibility at times. The hazardous conditions 
  could impact the evening commute today and the morning commute 
  on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-020415-
/O.CON.KBUF.WW.Y.0024.201202T0100Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
303 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS
EVENING TO 7 PM EST WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  on the Tug Hill Plateau, and higher terrain with 1 to 3 inches 
  of accumulation across lower elevations. Winds gusting as high 
  as 30 mph.

* WHERE...The Eastern Lake Ontario Region. Greatest 
  accumulations across the Tug Hill Plateau.

* WHEN...From 8 PM this evening to 7 PM EST Wednesday. The 
  majority of the snow accumulation will be very late tonight 
  through Wednesday.

* IMPACTS...Travel could be difficult at times with snow covered 
  roads and reduced visibility. The hazardous conditions could 
  impact the morning and evening commutes on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

Hitchcock
872 
WWUS41 KBUF 012219
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
519 PM EST Tue Dec 1 2020

NYZ019-020-085-020630-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
519 PM EST Tue Dec 1 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow. Total snow accumulations of 7 to 13 inches
  along the Chautauqua Ridge, Boston Hills, and across higher
  terrain with 2 to 4 inches of accumulation along Interstate 90
  and the immediate lakeshore. Winds gusting as high as 40 mph
  will produce some blowing and drifting snow.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...Until 1 PM EST Wednesday. Heaviest snow will occur 
  through early Wednesday morning.

* IMPACTS...The hazardous conditions could impact the evening
  commute and the morning commute on Wednesday. Roads will be 
  snow covered and very slippery. Visibility will be poor at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ001-002-020630-
/O.EXB.KBUF.WW.Y.0024.201202T0000Z-201202T1100Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
519 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM EST WEDNESDAY...

* WHAT...Snow expected. Snow accumulations of 3 to 5 inches
  tonight. Winds gusting as high as 35 mph.

* WHERE...Niagara and Orleans counties.

* WHEN...Until 6 AM EST Wednesday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ012-020630-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
519 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Snow. Total snow accumulations of 3 to 6 inches. Winds
  gusting as high as 40 mph.

* WHERE...Wyoming county.

* WHEN...Until 1 PM EST Wednesday. The majority of the snow will
  accumulate through early Wednesday morning.

* IMPACTS...Plan on snow covered and slippery road conditions 
  with reduced visibility at times. The hazardous conditions 
  could impact the evening commute today and the morning commute 
  on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-020630-
/O.CON.KBUF.WW.Y.0024.201202T0100Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
519 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  on the Tug Hill Plateau, and higher terrain with 1 to 3 inches 
  of accumulation across lower elevations. Winds gusting as high 
  as 30 mph.

* WHERE...The Eastern Lake Ontario Region. Greatest accumulations
  across the Tug Hill Plateau.

* WHEN...Until 7 PM EST Wednesday. The majority of the snow 
  accumulation will be very late tonight through Wednesday.


* IMPACTS...Travel could be difficult at times with snow covered 
  roads and reduced visibility. The hazardous conditions could 
  impact the morning and evening commutes on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

Apffel
404 
WWUS41 KBUF 020218
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
918 PM EST Tue Dec 1 2020

NYZ019-020-085-021030-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
918 PM EST Tue Dec 1 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Heavy snow. Total snow accumulations of 7 to 13 inches 
  along the Chautauqua Ridge, Boston Hills, and across higher 
  terrain with 2 to 4 inches of accumulation along Interstate 90 
  and the immediate lakeshore. Winds gusting as high as 40 mph 
  will produce some blowing and drifting snow.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...Until 1 PM EST Wednesday. Heaviest snow will occur 
  through early Wednesday morning.

* IMPACTS...The hazardous conditions could impact the morning 
  commute on Wednesday. Roads will be snow covered and very 
  slippery. Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-021030-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
918 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST
WEDNESDAY...

* WHAT...Snow. Total snow accumulations of 3 to 6 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Wyoming county.

* WHEN...Until 1 PM EST Wednesday. The majority of the snow will 
  accumulate through early Wednesday morning.

* IMPACTS...Plan on snow covered and slippery road conditions with
  reduced visibility at times. The hazardous conditions could
  impact the morning commute on Wednesday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-021030-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
918 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches
  on the Tug Hill Plateau, and higher terrain with 2 to 4 inches 
  of accumulation across lower elevations. Winds gusting as high 
  as 30 mph.

* WHERE...The Eastern Lake Ontario Region. Greatest 
  accumulations across the Tug Hill Plateau.

* WHEN...Until 7 PM EST Wednesday. The majority of the snow 
  accumulation will be very late tonight through Wednesday.

* IMPACTS...Travel could be difficult at times with snow covered
  roads and reduced visibility. The hazardous conditions will
  primarily impact the Wednesday morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ001-002-021030-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1100Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
918 PM EST Tue Dec 1 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST
WEDNESDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 5 inches
  tonight. Winds gusting as high as 35 mph.

* WHERE...Niagara and Orleans counties.

* WHEN...Until 6 AM EST Wednesday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

Apffel
142 
WWUS41 KBUF 020854
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
354 AM EST Wed Dec 2 2020

NYZ019-020-085-021700-
/O.CON.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
354 AM EST Wed Dec 2 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to 3 inches. 
  Winds gusting as high as 40 mph will produce some blowing snow.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties.

* WHEN...Until 1 PM EST this afternoon.

* IMPACTS...The hazardous conditions could impact the commute 
  this morning. Roads will be snow covered and very slippery. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Widespread accumulating snow will create dangerous travel
conditions.

Submit snow reports through our website or social media.

&&

$$

NYZ012-021700-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
354 AM EST Wed Dec 2 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to 2 inches. 
  Winds gusting as high as 40 mph.

* WHERE...Wyoming county.

* WHEN...Until 1 PM EST this afternoon.

* IMPACTS...Plan on snow covered and slippery road conditions with
  reduced visibility at times. The hazardous conditions could
  impact the commute this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ006>008-021700-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
354 AM EST Wed Dec 2 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 3 to 6 inches on
  the Tug Hill Plateau, and higher terrain with less 3 inches of
  additional accumulation across lower elevations. Winds gusting 
  as high as 35 mph.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...Until 7 PM EST this evening.

* IMPACTS...Travel could be difficult at times with snow covered
  roads and reduced visibility. The hazardous conditions will
  primarily impact the morning commute this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

NYZ001-002-021100-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201202T1100Z/
Niagara-Orleans-
Including the cities of Niagara Falls and Medina
354 AM EST Wed Dec 2 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST EARLY
THIS MORNING...

* WHAT...Snow. Additional snow accumulations of up to an inch.

* WHERE...Niagara and Orleans counties.

* WHEN...Until 6 AM EST early this morning.

* IMPACTS...Plan on slippery road conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

TMA
757 
WWUS41 KBUF 021146
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
646 AM EST Wed Dec 2 2020

NYZ019-020-085-021300-
/O.CAN.KBUF.WS.W.0004.000000T0000Z-201202T1800Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
646 AM EST Wed Dec 2 2020

...WINTER STORM WARNING IS CANCELLED...

The heaviest snow has ended. A few narrow snow bands may produce
another inch or so this morning.

Be alert for slick conditions this morning.

$$

NYZ012-021300-
/O.CAN.KBUF.WW.Y.0024.000000T0000Z-201202T1800Z/
Wyoming-
Including the city of Warsaw
646 AM EST Wed Dec 2 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

The heaviest snow has ended. A few narrow snow bands may produce
another inch or so this morning.

Be alert for slick conditions this morning.

$$

NYZ006>008-022000-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-201203T0000Z/
Oswego-Jefferson-Lewis-
Including the cities of Oswego, Watertown, and Lowville
646 AM EST Wed Dec 2 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 3 to 6 inches on 
  the Tug Hill Plateau, and higher terrain with less 3 inches of 
  additional accumulation across lower elevations. Winds gusting 
  as high as 35 mph.

* WHERE...The Eastern Lake Ontario Region.

* WHEN...Until 7 PM EST this evening.

* IMPACTS...Travel could be difficult at times with snow covered 
  roads and reduced visibility. The hazardous conditions will 
  primarily impact the morning commute this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Periods of snow will result in snow covered roads and limited
visibilities. Slow down and use caution while driving.

Submit snow reports through our website or social media.

&&

$$

TMA

What forecasters said that day

The local office's own words before this winter storm warning went out, 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 this winter storm warning went out at Nov 29, 10:13 PM EST, 5 hours 35 minutes earlier.

Area forecast discussion, Nov 29, 10:13 PM EST, 5 hours 35 minutes before
Area Forecast Discussion
National Weather Service Buffalo NY
1013 PM EST Sun Nov 29 2020

.SYNOPSIS...
High pressure off the east coast gives way to a deepening storm
system over the Deep South. The system will move to West Virginia by
daybreak Monday before tracking across the Finger Lakes to the
Adirondacks by Monday evening. It will spread a soaking rain of up
to an inch across our region in the process. This will be followed
by potentially significant snows across parts of the Southern Tier
Tuesday into Wednesday.

&&

.NEAR TERM /THROUGH MONDAY NIGHT/...
Quiet across New York with just increasing cirrus. Temps have fallen
as low as the lower 30s especially east of Lake Ontario with mainly
mid 30s to mid 40s elsewhere. Temps will rise at least a few degrees
late as low pressure deepening over the deep south moves to West
Virginia by daybreak. As that occurs, rain currently lifting across
Tennessee and Ohio Valleys will arrive over Southern Tier right
around daybreak and quickly turn to a steady rain.

Widespread steady rain spreads across entire region Monday as low
continues deepening to less than 995mb as it tracks across Finger
Lakes and Adirondacks. Rainfall should generally range from three
quarters to an inch, but pockets of rainfall over an inch are
likely. 18z and available 00z guidance still in line with this
thinking. Could see moderate rain taper to ligher rain or drizzle in
the afternoon as mid-level dry slot works south to north across the
region. Tight pressure gradient to west of the deepening sfc low
will also lead to breezy north to northeast winds in the afternoon
especially western NY. Those northeast winds off a cooler and moist
Lake Ontario in this regime of low-level moisture has prompted the
addition of fog over western NY in the afternoon, only further
adding to the raw and damp day as temperatures only rise to the mid
40s west to upper 40s/near 50 southeast and east of Lake Ontario.

Cold air will wrap in behind the storm Monday night...which is
expected to be nearly stationary in the vcnty of the Adirondacks by
that time. Wrap around synoptic moisture and the onset of lake
enhancement will set the stage for potentially significant
accumulations of wet snow across parts of the Southern Tier...
especially on and just east of the Chautauqua ridge. This lake
enhancement looks to kick in as early as the overnight hours on
Monday night.

&&

.SHORT TERM /TUESDAY THROUGH THURSDAY/...
The surface low causing the steady rain Monday will linger overhead
of the state of New York Tuesday before it slowly weakens and
meanders northward into southern Canada Wednesday. While this
occurs, cold air on the back side of the low will continue to filter
into the region from the west Tuesday and Tuesday night, deepening
the cold air mass. By Tuesday night, the majority of the region will
be seeing some flakes due to the deeper cold air mass overhead.
Additionally, this air mass will also produce a lake response east
and northeast of the lakes Tuesday night through Wednesday,
producing moderate amounts across the western Southern Tier. Places
across the Chautauqua Ridge could see a foot or more of wet snow
from Tuesday morning to Wednesday morning. Otherwise, for the
areas east of Lake Ontario an inch or two will be possible.

Upper level ridging over the Ohio Valley will produce surface high
pressure over the lower Ohio Valley/Mid-Atlantic Wednesday night and
Thursday. The northern periphery of the surface high pressure and
its associated drier air mass will lie across the region during this
time, shutting off any lingering showers Wednesday night with dry
conditions Thursday.

&&

.LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
A cut off upper level low over the Oklahoma Panhandle Thursday will
get picked up by a shortwave trough rounding the northern-stream
longwave trough. These two upper level features will produce two
lows at the surface which will produce the weather for Friday and the
weekend.

The aforementioned shortwave will produce surface low which will
push east across Canada and drag its associated frontal feature
across the region Friday producing chances for showers.

As the upper level low interacts with the shortwave, a surface low
will deepen and push northeast up along the Eastern Seaboard
Saturday and Sunday, which again will produce chances for showers.

Some disagreement still with placement of the sfc low that develops
over the SE U.S. late Saturday into early Sunday, and its track, so
kept chance POPs for now.

Temperatures for the long term period will be near normal.

&&

.AVIATION /03Z MONDAY THROUGH FRIDAY/...
VFR weather through early Monday morning with thickening cirrus
shield. Conditions will then deteriorate by daybreak Monday as cigs
lower to MVFR across the Southern Tier. These lower cigs will be
accompanied by the onset of steady rain.

Cigs, and even in some areas vsby, will lower to IFR/LIFR levels
across the entire region into Monday afternoon as a storm system
advancing north from West Virginia spreads steady rain across all
the TAF sites. In addition to the rain, fog is likely over western
NY in the afternoon.

Outlook...
Monday night...IFR/MVFR. Rain and snow showers.
Tuesday...VFR/MVFR with rain and snow.
Wednesday...VFR/MVFR with the chance for rain and snow showers.
Thursday...Mainly VFR.
Friday...VFR to MVFR with scattered rain and snow showers.

&&

.MARINE...
Rapidly intensifying low pressure over the deep south will bring
about strengthening northeast and northerly winds by midday Monday
into Monday evening. Small craft advisories have been issued for all
areas except the St. Lawrence River. After a break late Monday night
into Tuesday, another round of small craft conditions will develop
later Tuesday through Thursday.

&&

.BUF WATCHES/WARNINGS/ADVISORIES...
NY...Winter Storm Watch from late Monday night through Wednesday
     afternoon for NYZ019-020-085.
MARINE...Small Craft Advisory from 10 AM Monday to 4 AM EST Tuesday for
         LEZ040-041.
         Small Craft Advisory from 10 AM to 10 PM EST Monday for
         LEZ020.
         Small Craft Advisory from 10 AM Monday to 1 AM EST
         Tuesday for LOZ030-042>045.

&&

SYNOPSIS...RSH
NEAR TERM...JLA/RSH
SHORT TERM...EAJ
LONG TERM...EAJ/SW
AVIATION...JLA/RSH
MARINE...JLA
Hazardous weather outlook, Nov 29, 2:08 PM EST, 13 hours 40 minutes before
Hazardous Weather Outlook
National Weather Service Buffalo NY
208 PM EST Sun Nov 29 2020

NYZ001>008-010>014-021-301915-
Niagara-Orleans-Monroe-Wayne-Northern Cayuga-Oswego-Jefferson-Lewis-
Northern Erie-Genesee-Wyoming-Livingston-Ontario-Allegany-
208 PM EST Sun Nov 29 2020

This Hazardous Weather Outlook is for portions of western and north
central New York.

.DAY ONE...This afternoon and tonight.

No hazardous weather expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

A storm system will bring a soaking rain Monday with a general three
quarters of an inch to an inch expected, and may result in ponding
of water in poor drainage areas.

.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

NYZ019-020-085-301915-
Chautauqua-Cattaraugus-Southern Erie-
208 PM EST Sun Nov 29 2020

...WINTER STORM WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH
WEDNESDAY AFTERNOON...

This Hazardous Weather Outlook is for portions of western New York.

.DAY ONE...This afternoon and tonight.

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.

   Winter Storm Watch.

A storm system will bring a soaking rain Monday with a general three
quarters of an inch to an inch expected, and may result in ponding
of water in poor drainage areas.

.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

LEZ020-040-041-LOZ030-042>045-062>065-SLZ022-024-301915-
Upper Niagara River and Buffalo Harbor-
Lake Erie nearshore waters from Ripley to Dunkirk-
Lake Erie nearshore waters from Dunkirk to Buffalo-
Lower Niagara River-
Lake Ontario nearshore waters from the Niagara River to Hamlin Beach-
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 the Niagara River to Hamlin Beach-
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-
Saint Lawrence River from Cape Vincent to Ogdensburg-
Saint Lawrence River from Ogdensburg to Saint Regis-
208 PM EST Sun Nov 29 2020

This Hazardous Weather Outlook is for the New York waters of Lake
Erie, Lake Ontario, and the Saint Lawrence River.

.DAY ONE...This afternoon and 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 office that day

Everything else NWS Buffalo, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 29, 9:25 PM ESTSmall Craft AdvisoryBUF5 days
Nov 30, 12:32 PM ESTWinter Weather AdvisoryBUFJefferson, Lewis, Niagara, Orleans, Oswego, Wyoming50 hr

Nearby

Winter Storm Warnings in New York, 2020Every winter storm warning in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.