Alert archive / New York / Lake Effect Snow Warnings in 2021

Lake Effect Snow Warning 9, NWS Buffalo, NY

February 19, 20216 counties in New York

NWS Buffalo, NY issued this lake effect snow warning at Feb 19, 2021, 2:32 PM EST for 6 counties in New York. It took effect at Feb 19, 2021, 6:00 PM EST. It was in force for 29 hr. 60 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: Feb 19, 2021, 2:32 PM EST (19:32 UTC)
In effect from: Feb 19, 2021, 6:00 PM EST
Expired: Feb 20, 2021, 11:05 PM EST
In force: 29 hr
Issued by: NWS Buffalo, NY

Counties Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Erie County, NY, Wayne County, NY, Wyoming County, NY

The radar

The Buffalo radar (KBUF), 59 km from the middle of the area, began a volume at 19:34 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

Time	Report	Where	Remark
Feb 20, 12:00 AM EST	SNOW 6	Springville, NY	COCORAHS STATION NY-ER-195 SPRINGVILLE 0.4 NE.
Feb 20, 5:00 AM EST	SNOW 4.5	1 Wnw Fredonia, NY	COCORAHS STATION NY-CQ-22 FREDONIA 0.8 WNW.
Feb 20, 6:21 AM EST	SNOW 15	Colden, NY
Feb 20, 6:23 AM EST	SNOW 12	Angola, NY
Feb 20, 6:30 AM EST	SNOW 4	1 Sse Silver Creek, NY	COCORAHS STATION NY-CQ-27 SILVER CREEK 1.0 SSE.
Feb 20, 6:30 AM EST	SNOW 14	1 Se Angola On The Lake, NY
Feb 20, 6:59 AM EST	SNOW 8	2 Wsw Holland, NY
Feb 20, 7:00 AM EST	SNOW 6.4	3 W Warsaw, NY	CO-OP OBSERVER STATION WSWN6 WARSAW 4W.
Feb 20, 7:00 AM EST	SNOW 8.1	2 Se East Aurora, NY	CO-OP OBSERVER STATION WLSN6 WALES.
Feb 20, 7:00 AM EST	SNOW 9.5	Hamburg, NY	COCORAHS STATION NY-ER-39 HAMBURG 0.4 WSW.
Feb 20, 7:00 AM EST	SNOW 19.1	1 Wnw Colden, NY	COCORAHS STATION NY-ER-166 BOSTON 2.5 NE.
Feb 20, 7:00 AM EST	SNOW 22	1 Ne Boston, NY	COCORAHS STATION NY-ER-65 BOSTON 1.5 NE.
Feb 20, 7:30 AM EST	SNOW 5.5	Silver Creek, NY	CO-OP OBSERVER STATION SILN6 SILVER CREEK.
Feb 20, 7:30 AM EST	SNOW 7.6	5 Ne Angola On The Lake, NY
Feb 20, 7:30 AM EST	SNOW 11.8	3 Ene Holland, NY
Feb 20, 7:30 AM EST	SNOW 18.4	1 W Colden, NY	CO-OP OBSERVER STATION CODN6 COLDEN 1W.
Feb 20, 7:30 AM EST	SNOW 29.5	Boston, NY
Feb 20, 7:45 AM EST	SNOW 13	Hamburg, NY
Feb 20, 7:58 AM EST	SNOW 8	4 Nw Springville, NY
Feb 20, 8:00 AM EST	SNOW 8.5	Sardinia, NY
Feb 20, 8:00 AM EST	SNOW 10.8	East Aurora, NY	COCORAHS STATION NY-ER-50 EAST AURORA 0.1 ENE.
Feb 20, 8:00 AM EST	SNOW 11.5	2 Nw South Wales, NY	COCORAHS STATION NY-ER-158 EAST AURORA 2.7 SSE.
Feb 20, 8:00 AM EST	SNOW 16	2 Se Glenwood, NY	COCORAHS STATION NY-ER-63 GLENWOOD 1.5 SE.
Feb 20, 8:04 AM EST	SNOW 8.7	2 Nw South Wales, NY
Feb 20, 8:15 AM EST	SNOW 30	West Falls, NY
Feb 20, 8:50 AM EST	SNOW 13.8	1 Sse Eden, NY
Feb 20, 9:00 AM EST	SNOW 6.7	2 Ese Elma Center, NY	COCORAHS STATION NY-ER-138 EAST AURORA 3.4 NNE.
Feb 20, 9:00 AM EST	SNOW 7	1 E East Aurora, NY	COCORAHS STATION NY-ER-66 EAST AURORA 1.0 ESE.
Feb 20, 9:00 AM EST	SNOW 11.1	2 Nw South Wales, NY
Feb 20, 9:10 AM EST	SNOW 6.5	3 Ese Sodus Point, NY	FROM SOCIAL MEDIA.
Feb 20, 9:57 AM EST	SNOW 13	2 Nw South Wales, NY	IN TOWN OF AURORA, NEAR EMERY PARK.
Feb 20, 9:57 AM EST	SNOW 22	2 Nw South Wales, NY	IN TOWN OF AURORA, NEAR EMERY PARK. UPDATED TOTAL.
Feb 20, 10:00 AM EST	SNOW 11	1 S Orchard Park, NY	FROM SOCIAL MEDIA.
Feb 20, 10:00 AM EST	SNOW 12	Angola, NY	FROM SOCIAL MEDIA.
Feb 20, 10:30 AM EST	SNOW 9	2 S Marilla, NY	AT CORNER OF TWO ROD RD AND JAMISON RD.
Feb 20, 11:00 AM EST	SNOW 7	Sodus, NY
Feb 20, 11:13 AM EST	SNOW 5.2	2 Nnw Elma Center, NY
Feb 20, 11:30 AM EST	SNOW 7.8	2 Ne Hamburg, NY
Feb 20, 11:44 AM EST	SNOW 19	Angola On The Lake, NY	FROM SOCIAL MEDIA.
Feb 20, 11:49 AM EST	SNOW 8	Orchard Park, NY	5.0 INCHES HAS FALLEN SINCE 745 AM.
Feb 20, 12:01 PM EST	SNOW 7.2	5 Nne West Valley, NY
Feb 20, 1:36 PM EST	SNOW 25.6	2 Nw Colden, NY	6.5 INCHES IN LAST 6 HOURS.
Feb 20, 1:50 PM EST	SNOW 18.2	2 Nw South Wales, NY	STORM TOTAL; AN ADDITIONAL 7.1 INCHES SINCE 9 AM.
Feb 20, 2:11 PM EST	SNOW 9.5	Pultneyville, NY	FELL SINCE LAST EVENING.
Feb 20, 2:17 PM EST	SNOW 10	3 Wsw Elma Center, NY
Feb 20, 2:18 PM EST	SNOW 3.8	Alden, NY
Feb 20, 2:20 PM EST	SNOW 4.5	5 Ene Sodus Point, NY	FROM SOCIAL MEDIA.
Feb 20, 2:30 PM EST	SNOW 8	3 S Springville, NY
Feb 20, 2:45 PM EST	SNOW 4	1 Ne Dunkirk, NY
Feb 20, 3:25 PM EST	SNOW 9.5	Orchard Park, NY	AN ADDITIONAL 1.5 INCHES SINCE NOON.
Feb 20, 3:53 PM EST	SNOW 5.6	3 Se West Seneca, NY	STORM TOTAL.
Feb 20, 4:15 PM EST	SNOW 19	2 Ne Hamburg, NY	UPDATED AS OF 415 PM.
Feb 20, 4:30 PM EST	SNOW 5.3	Hamburg, NY	SINCE 7 AM.
Feb 20, 4:55 PM EST	SNOW 12.5	3 Wsw Elma Center, NY	UPDATED TOTAL, HAS STOPPED SNOWING.
Feb 20, 5:11 PM EST	SNOW 13.5	2 S Marilla, NY	AT CORNER OF TWO ROD RD AND JAMISON RD. UPDATED TOTAL.
Feb 20, 5:15 PM EST	SNOW 19.5	1 Sse Eden, NY
Feb 20, 5:20 PM EST	SNOW 24	1 Ne Eden, NY	FROM SOCIAL MEDIA.
Feb 20, 7:00 PM EST	SNOW 30.1	1 Nw Colden, NY	30-HOUR STORM TOTAL.
Feb 20, 8:00 PM EST	SNOW 19	3 Ene Holland, NY
Feb 20, 10:49 PM EST	SNOW 46	Boston, NY	STORM TOTAL THROUGH 7PM.

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 12:00Z, 7.5 hours before the alert went out and 56 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 567 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

047 
WWUS41 KBUF 191932
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
232 PM EST Fri Feb 19 2021

NYZ004-005-200345-
/O.UPG.KBUF.WS.A.0006.210219T2300Z-210220T2300Z/
/O.NEW.KBUF.LE.W.0009.210219T2300Z-210220T2300Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
232 PM EST Fri Feb 19 2021

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 6 PM THIS EVENING TO
6 PM EST SATURDAY...

* WHAT...Heavy lake effect snow expected. Total snow 
  accumulations of 6 to 9 inches in the most persistent lake 
  snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...From 6 PM this evening to 6 PM EST Saturday.

* IMPACTS...Travel will be very difficult at times with snow
  covered roads and very poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4318 7647 4323 7658 4327 7703 4326 7730 
        4315 7734 4314 7720 4307 7697 4305 7698 4302 7662 
        4302 7650 
TIME Y21M02D19T2300Z-Y21M02D20T1200Z
COORD...4315 7648 4318 7673 4324 7688 4327 7723 
        4324 7736 4320 7737 4312 7729 4303 7698 4303 7680 
        4302 7650 
TIME Y21M02D20T1200Z-Y21M02D20T2300Z

$$

NYZ003-200345-
/O.UPG.KBUF.WS.A.0006.210219T2300Z-210220T2300Z/
/O.NEW.KBUF.WW.Y.0013.210219T2300Z-210220T2300Z/
Monroe-
Including the city of Rochester
232 PM EST Fri Feb 19 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
6 PM EST SATURDAY...

* WHAT...Lake effect snow expected. Total snow accumulations of 
  3 to 6 inches in the most persistent lake snows.

* WHERE...Monroe county. Greatest accumulations along and north of
  Route 104.

* WHEN...From 6 PM this evening to 6 PM EST Saturday.

* IMPACTS...Plan on snow covered and slippery road conditions with
  reduced visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ012-019-020-085-200345-
/O.NEW.KBUF.WW.Y.0013.210219T2300Z-210221T0300Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
232 PM EST Fri Feb 19 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM THIS EVENING TO
10 PM EST SATURDAY...

* WHAT...Lake effect snow expected. Total snow accumulations of 
  4 to 7 inches in the most persistent lake snows.

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

* WHEN...From 6 PM this evening to 10 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

Hitchcock

7 follow-up statements

584 
WWUS41 KBUF 200021
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
721 PM EST Fri Feb 19 2021

NYZ019-020-085-201000-
/O.UPG.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
/O.EXB.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
721 PM EST Fri Feb 19 2021

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 10 PM EST SATURDAY...

* WHAT...Heavy lake effect snow. Total snow accumulations of 7 to
  11 inches in the most persistent lake snows.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties. The
  heavy snow will only impact far northern portions of Chautauqua
  and Cattaraugus counties.

* WHEN...Until 10 PM EST Saturday.

* IMPACTS...Travel will be very difficult at times with snow
  covered roads and very poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4256 7852 4269 7853 4273 7873 4270 7889 
        4252 7930 4241 7958 4234 7951 4233 7915 4240 7893 
        4244 7869 
TIME Y21M02D20T0000Z-Y21M02D20T0900Z
COORD...4254 7850 4275 7848 4276 7879 4269 7895 
        4258 7929 4253 7936 4237 7965 4231 7966 4233 7933 
        4241 7908 
TIME Y21M02D20T0900Z-Y21M02D21T0300Z

$$

NYZ004-005-201000-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210220T2300Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
721 PM EST Fri Feb 19 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 6 PM EST
SATURDAY...

* WHAT...Heavy lake effect snow expected. Total snow 
  accumulations of 6 to 9 inches in the most persistent lake 
  snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until 6 PM EST Saturday.

* IMPACTS...Travel will be very difficult at times with snow
  covered roads and very poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4318 7647 4323 7658 4327 7703 4326 7730 
        4315 7734 4314 7720 4307 7697 4305 7698 4302 7662 
        4302 7650 
TIME Y21M02D19T2300Z-Y21M02D20T1200Z
COORD...4315 7648 4318 7673 4324 7688 4327 7723 
        4324 7736 4320 7737 4312 7729 4303 7698 4303 7680 
        4302 7650 
TIME Y21M02D20T1200Z-Y21M02D20T2300Z

$$

NYZ010-201000-
/O.EXA.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-
Including the city of Buffalo
721 PM EST Fri Feb 19 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 PM EST SATURDAY...

* WHAT...Lake effect snow. Additional snow accumulations of 3 to 
  6 inches in the most persistent lake snows.

* WHERE...A portion of Northern Erie county, south of a Buffalo to
  Lancaster to Alden line. Much less snow accumulation in the
  northtowns.

* WHEN...Until 10 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ003-201000-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210220T2300Z/
Monroe-
Including the city of Rochester
721 PM EST Fri Feb 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST
SATURDAY...

* WHAT...Lake effect snow. Additional snow accumulations of 3 to 
  6 inches in the most persistent lake snows.

* WHERE...Monroe county. Greatest accumulations along and north of
  Route 104.

* WHEN...Until 6 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ012-201000-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Wyoming-
Including the city of Warsaw
721 PM EST Fri Feb 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM EST
SATURDAY...

* WHAT...Lake effect snow. Additional snow accumulations of 4 to 
  7 inches in the most persistent lake snows.

* WHERE...Wyoming county.

* WHEN...Until 10 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

Apffel

792 
WWUS41 KBUF 200603
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
103 AM EST Sat Feb 20 2021

NYZ004-005-201400-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210220T2300Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
103 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 6 PM EST THIS
EVENING...

* WHAT...Heavy lake effect snow expected. Total snow 
  accumulations of 6 to 10 inches in the most persistent lake 
  snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until 6 PM EST Saturday.

* IMPACTS...Travel will be very difficult at times with snow 
  covered roads and very poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4318 7647 4323 7658 4327 7703 4326 7730 
        4315 7734 4314 7720 4307 7697 4305 7698 4302 7662 
        4302 7650 
TIME Y21M02D19T2300Z-Y21M02D20T1200Z
COORD...4315 7648 4318 7673 4324 7688 4327 7723 
        4324 7736 4320 7737 4312 7729 4303 7698 4303 7680 
        4302 7650 
TIME Y21M02D20T1200Z-Y21M02D20T2300Z

$$

NYZ019-020-085-201400-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
103 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 10 PM EST
THIS EVENING...

* WHAT...Heavy lake effect snow. Total snow accumulations of 7 
  to 11 inches in the most persistent lake snows.

* WHERE...Chautauqua, Cattaraugus, and Southern Erie counties. 
  The heavies snow will only impact far northern portions of 
  Chautauqua and Cattaraugus counties.

* WHEN...Until 10 PM EST Saturday.

* IMPACTS...Travel will be very difficult at times with snow 
  covered roads and very poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4256 7852 4269 7853 4273 7873 4270 7889 
        4252 7930 4241 7958 4234 7951 4233 7915 4240 7893 
        4244 7869 
TIME Y21M02D20T0000Z-Y21M02D20T0900Z
COORD...4254 7850 4275 7848 4276 7879 4269 7895 
        4258 7929 4253 7936 4237 7965 4231 7966 4233 7933 
        4241 7908 
TIME Y21M02D20T0900Z-Y21M02D21T0300Z

$$

NYZ003-201400-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210220T2300Z/
Monroe-
Including the city of Rochester
103 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 3 to 
  6 inches in the most persistent lake snows.

* WHERE...Monroe county. Greatest accumulations along and north 
  of Route 104.

* WHEN...Until 6 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered 
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ010-012-201400-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-Wyoming-
Including the cities of Buffalo and Warsaw
103 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 3 to 
  6 inches in the most persistent lake snows.

* WHERE...Northern Erie and Wyoming counties.

* WHEN...Until 10 PM EST Saturday.

* IMPACTS...Travel will be difficult at times with snow covered 
  roads and poor visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

291 
WWUS41 KBUF 200948
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
448 AM EST Sat Feb 20 2021

NYZ012-201800-
/O.UPG.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
/O.EXA.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Wyoming-
Including the city of Warsaw
448 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 10 PM EST THIS
EVENING...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 6 to 10 inches in the most persistent lake snows.

* WHERE...Wyoming county.

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ004-005-201800-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210220T2300Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
448 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 6 PM EST THIS
EVENING...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 6 to 10 inches in the most persistent lake snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until 6 PM EST this evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4318 7647 4323 7658 4327 7703 4326 7730 
        4315 7734 4314 7720 4307 7697 4305 7698 4302 7662 
        4302 7650 
TIME Y21M02D19T2300Z-Y21M02D20T1200Z
COORD...4315 7648 4318 7673 4324 7688 4327 7723 
        4324 7736 4320 7737 4312 7729 4303 7698 4303 7680 
        4302 7650 
TIME Y21M02D20T1200Z-Y21M02D20T2300Z

$$

NYZ019-020-085-201800-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Jamestown, Olean, Orchard Park, 
and Springville
448 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 10 PM EST
THIS EVENING...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 6 to 12 inches in the most persistent lake snows.

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

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4256 7852 4269 7853 4273 7873 4270 7889 
        4252 7930 4241 7958 4234 7951 4233 7915 4240 7893 
        4244 7869 
TIME Y21M02D20T0000Z-Y21M02D20T0900Z
COORD...4254 7850 4275 7848 4276 7879 4269 7895 
        4258 7929 4253 7936 4237 7965 4231 7966 4233 7933 
        4241 7908 
TIME Y21M02D20T0900Z-Y21M02D21T0300Z

$$

NYZ003-201800-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210220T2300Z/
Monroe-
Including the city of Rochester
448 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 4 to 
  7 inches in the most persistent lake snows.

* WHERE...Monroe county.

* WHEN...Until 6 PM EST this evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ010-201800-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-
Including the city of Buffalo
448 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 5 to 
  8 inches in the most persistent lake snows south of Buffalo.

* WHERE...Northern Erie county.

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

470 
WWUS41 KBUF 201455
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
955 AM EST Sat Feb 20 2021

NYZ004-005-210000-
/O.EXT.KBUF.LE.W.0009.000000T0000Z-210221T0500Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
955 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING NOW IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...

* WHAT...Heavy lake effect snow. Additional snow accumulations of
  7 to 10 inches in the most persistent lake snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until midnight EST tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4331 7695 4327 7745 4342 7841 4332 7869 
        4313 7858 4305 7742 4294 7697 4303 7695 4302 7650 
        4315 7648 
TIME Y21M02D20T1200Z-Y21M02D20T2100Z
COORD...4322 7650 4327 7673 4333 7738 4327 7745 
        4328 7756 4324 7754 4313 7711 4302 7686 4304 7686 
        4302 7650 
TIME Y21M02D20T2100Z-Y21M02D21T0500Z

$$

NYZ012-019-020-085-210000-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
955 AM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 10 PM EST
THIS EVENING...

* WHAT...Heavy lake effect snow. Additional snow accumulations of
  5 to 8 inches in the most persistent lake snows.

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

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4275 7816 4280 7827 4282 7869 4276 7900 
        4268 7913 4259 7914 4254 7906 4254 7873 4258 7828 
        4264 7818 
TIME Y21M02D20T1200Z-Y21M02D20T2100Z

$$

NYZ003-202300-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210220T2300Z/
Monroe-
Including the city of Rochester
955 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 2 to 
  4 inches in the most persistent lake snows.

* WHERE...Monroe county.

* WHEN...Until 6 PM EST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ010-210000-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-
Including the city of Buffalo
955 AM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 2 to 
  4 inches in the most persistent lake snows.

* WHERE...Northern Erie county.

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$
JLA

032 
WWUS41 KBUF 202032
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
332 PM EST Sat Feb 20 2021

NYZ004-005-210445-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0500Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
332 PM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 3 to 5 inches in the most persistent lake snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until midnight EST tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4331 7695 4327 7745 4342 7841 4332 7869 
        4313 7858 4305 7742 4294 7697 4303 7695 4302 7650 
        4315 7648 
TIME Y21M02D20T1200Z-Y21M02D20T2100Z
COORD...4322 7650 4327 7673 4333 7738 4327 7745 
        4328 7756 4324 7754 4313 7711 4302 7686 4304 7686 
        4302 7650 
TIME Y21M02D20T2100Z-Y21M02D21T0500Z

$$

NYZ012-019-020-085-210300-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
332 PM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 10 PM EST
THIS EVENING...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 2 to 4 inches in the most persistent lake snows.

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

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4275 7816 4280 7827 4282 7869 4276 7900 
        4268 7913 4259 7914 4254 7906 4254 7873 4258 7828 
        4264 7818 
TIME Y21M02D20T1200Z-Y21M02D20T2100Z

$$

NYZ003-210445-
/O.EXT.KBUF.WW.Y.0013.000000T0000Z-210221T0500Z/
Monroe-
Including the city of Rochester
332 PM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...

* WHAT...Lake effect snow. Additional snow accumulations of 1 to 
  3 inches in the most persistent lake snows.

* WHERE...Monroe county.

* WHEN...Until midnight EST tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

NYZ010-210300-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-
Including the city of Buffalo
332 PM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM EST THIS
EVENING...

* WHAT...Lake effect snow. Additional snow accumulations of 1 to 
  2 inches in the most persistent lake snows.

* WHERE...Northern Erie county.

* WHEN...Until 10 PM EST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

Apffel

031 
WWUS41 KBUF 210236
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
936 PM EST Sat Feb 20 2021

NYZ012-019-020-085-210345-
/O.CAN.KBUF.LE.W.0009.000000T0000Z-210221T0300Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
936 PM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING IS CANCELLED...


$$

NYZ010-210345-
/O.CAN.KBUF.WW.Y.0013.000000T0000Z-210221T0300Z/
Northern Erie-
Including the city of Buffalo
936 PM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY IS CANCELLED...


$$

NYZ004-005-210500-
/O.CON.KBUF.LE.W.0009.000000T0000Z-210221T0500Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
936 PM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...

* WHAT...Lake effect snow. Additional snow accumulations of an
  inch or two in the most persistent lake snows.

* WHERE...Wayne and Northern Cayuga counties.

* WHEN...Until midnight EST tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Heavy snow will fall in relatively narrow bands. If traveling, be
prepared for rapidly changing road conditions and visibilities.

Submit snow reports through our website or social media.

&&

Experimental content below...do not use operationally
Please see below links for more information on this experiment
http://www.weather.gov/buf/polygon_pdd
http://www.nws.noaa.gov/os/notification/
pns15lake_effect_snowaaa.htm
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4331 7695 4327 7745 4342 7841 4332 7869 
        4313 7858 4305 7742 4294 7697 4303 7695 4302 7650 
        4315 7648 
TIME Y21M02D20T1200Z-Y21M02D20T2100Z
COORD...4322 7650 4327 7673 4333 7738 4327 7745 
        4328 7756 4324 7754 4313 7711 4302 7686 4304 7686 
        4302 7650 
TIME Y21M02D20T2100Z-Y21M02D21T0500Z

$$

NYZ003-210500-
/O.CON.KBUF.WW.Y.0013.000000T0000Z-210221T0500Z/
Monroe-
Including the city of Rochester
936 PM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EST
TONIGHT...

* WHAT...Lake effect snow. Additional snow accumulations of an 
  inch or less in the most persistent lake snows.

* WHERE...Monroe county.

* WHEN...Until midnight EST tonight.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Lake effect snow will fall in relatively narrow bands. If
traveling, be prepared for rapidly changing road conditions and
visibilities.

Submit snow reports through our website or social media.

&&

$$

188 
WWUS41 KBUF 210405
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1105 PM EST Sat Feb 20 2021

NYZ004-005-210515-
/O.CAN.KBUF.LE.W.0009.000000T0000Z-210221T0500Z/
Wayne-Northern Cayuga-
Including the cities of Newark and Fair Haven
1105 PM EST Sat Feb 20 2021

...LAKE EFFECT SNOW WARNING IS CANCELLED...

While another inch or so of accumulation will be possible
overnight, additional impactful snowfall is no longer expected.

$$

NYZ003-210515-
/O.CAN.KBUF.WW.Y.0013.000000T0000Z-210221T0500Z/
Monroe-
Including the city of Rochester
1105 PM EST Sat Feb 20 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

While another inch or so of accumulation will be possible
overnight, additional impactful snowfall is no longer expected.

$$

RSH/AR

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 19, 2:32 PM EST	Winter Weather Advisory	BUF	Cattaraugus, Chautauqua, Erie, Monroe, Wyoming	33 hr

Nearby

Lake Effect Snow Warnings in New York, 2021 Every lake effect snow warning in 2021

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.