Alert archive / New York / Winter Storm Watches in 2021

Winter Storm Watch 2, NWS Buffalo, NY

January 18, 2021Jefferson County, Lewis County, New York

NWS Buffalo, NY issued this winter storm watch at Jan 18, 2021, 3:25 AM EST for Jefferson County, Lewis County, New York. It took effect at Jan 19, 2021, 10:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 18, 2021, 3:25 AM EST (08:25 UTC)
In effect from: Jan 19, 2021, 10:00 AM EST
Expired: Jan 18, 2021, 1:28 PM EST
In force
Issued by: NWS Buffalo, NY

Counties Jefferson County, NY, Lewis County, NY

The radar

The Ft Drum radar (KTYX), 16 km from the middle of the area, began a volume at 08:29 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.

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 8.4 hours before the alert went out and 205 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: 1238 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

134 
WWUS41 KBUF 180825
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
325 AM EST Mon Jan 18 2021

NYZ012-019-020-085-181630-
/O.CON.KBUF.LE.W.0001.000000T0000Z-210119T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
325 AM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
TUESDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 8 to 16 inches in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie 
  counties. The greatest snow accumulations will extend from the
  Chautauqua Ridge to the Boston Hills, with notably less 
  accumulation south of a Jamestown to Ellicottville line.

* WHEN...Until 7 AM EST Tuesday.

* IMPACTS...Travel could be very difficult, especially across the
  higher terrain. The hazardous conditions will likely impact the
  morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...4273 7823 4274 7837 4277 7837 4278 7878 
        4271 7894 4259 7890 4260 7869 4261 7854 4261 7834 
        4266 7820 
TIME Y21M01D18T0000Z-Y21M01D18T0600Z
COORD...4262 7823 4271 7823 4274 7861 4271 7897 
        4262 7922 4241 7958 4228 7952 4226 7934 4232 7880 
        4247 7848 
TIME Y21M01D18T0600Z-Y21M01D18T1800Z
COORD...4269 7826 4283 7836 4268 7913 4249 7922 
        4234 7945 4233 7918 4247 7895 4242 7887 4240 7864 
        4255 7838 
TIME Y21M01D18T1800Z-Y21M01D19T1200Z

$$

NYZ021-181630-
/O.NEW.KBUF.WW.Y.0004.210118T0825Z-210119T1000Z/
Allegany-
Including the city of Wellsville
325 AM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 AM EST TUESDAY...

* WHAT...Snow. Total snow accumulations of 5 to 10 inches.

* WHERE...Allegany county.

* WHEN...Until 5 AM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel
  could be difficult across the higher terrain north and west of
  Belmont. The hazardous conditions could impact the morning and 
  evening commutes.

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.

&&

$$

NYZ010-181630-
/O.NEW.KBUF.WW.Y.0004.210118T2300Z-210120T0000Z/
Northern Erie-
Including the city of Buffalo
325 AM EST Mon Jan 18 2021

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

* WHAT...Accumulating snow expected. Total snow accumulations of 
  5 to 9 inches.

* WHERE...Northern Erie county.

* WHEN...From 6 PM this evening to 7 PM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel
  could be difficult in the vicinity of the Southtowns and
  especially in the higher terrain. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

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.

&&

$$

NYZ007-008-181630-
/O.NEW.KBUF.WS.A.0002.210119T1500Z-210120T1100Z/
Jefferson-Lewis-
Including the cities of Watertown and Lowville
325 AM EST Mon Jan 18 2021

...WINTER STORM WATCH IN EFFECT FROM TUESDAY MORNING THROUGH LATE
TUESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of nine
  inches or more possible, especially on the Tug Hill Plateau.

* WHERE...Jefferson and Lewis counties.

* WHEN...From Tuesday morning through late Tuesday night.

* IMPACTS...Travel could become very difficult. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Begin needed preparations at home or with your vehicle. Travel
may become difficult, so plan accordingly.

&&

$$

3 follow-up statements

233 
WWUS41 KBUF 181142
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
642 AM EST Mon Jan 18 2021

NYZ012-019-020-085-182000-
/O.CON.KBUF.LE.W.0001.000000T0000Z-210119T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
642 AM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
TUESDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 8 to 16 inches in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie
  counties. The greatest snow accumulations will extend from the
  Chautauqua Ridge to the Boston Hills, with less accumulation 
  south of a Jamestown to Ellicottville line.

* WHEN...Until 7 AM EST Tuesday.

* IMPACTS...Travel could be very difficult, especially across 
  the higher terrain. The hazardous conditions will likely 
  impact the morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...4273 7823 4274 7837 4277 7837 4278 7878 
        4271 7894 4259 7890 4260 7869 4261 7854 4261 7834 
        4266 7820 
TIME Y21M01D18T0000Z-Y21M01D18T0600Z
COORD...4262 7823 4271 7823 4274 7861 4271 7897 
        4262 7922 4241 7958 4228 7952 4226 7934 4232 7880 
        4247 7848 
TIME Y21M01D18T0600Z-Y21M01D18T1800Z
COORD...4269 7826 4283 7836 4268 7913 4249 7922 
        4234 7945 4233 7918 4247 7895 4242 7887 4240 7864 
        4255 7838 
TIME Y21M01D18T1800Z-Y21M01D19T1200Z

$$

NYZ021-182000-
/O.CON.KBUF.WW.Y.0004.000000T0000Z-210119T1000Z/
Allegany-
Including the city of Wellsville
642 AM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST
TUESDAY...

* WHAT...Snow. Total snow accumulations of 5 to 10 inches.

* WHERE...Allegany county.

* WHEN...Until 5 AM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel 
  could be difficult across the higher terrain north and west of 
  Belmont. The hazardous conditions could impact the morning and 
  evening commutes.

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.

&&

$$

NYZ010-182000-
/O.CON.KBUF.WW.Y.0004.210118T2300Z-210120T0000Z/
Northern Erie-
Including the city of Buffalo
642 AM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 7 PM EST TUESDAY...

* WHAT...Accumulating snow expected. Total snow accumulations of 
  5 to 9 inches.

* WHERE...Northern Erie county.

* WHEN...From 6 PM this evening to 7 PM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel 
  could be difficult in the vicinity of the Southtowns and 
  especially in the higher terrain. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

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.

&&

$$

NYZ007-008-182000-
/O.CON.KBUF.WS.A.0002.210119T1500Z-210120T1100Z/
Jefferson-Lewis-
Including the cities of Watertown and Lowville
642 AM EST Mon Jan 18 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH LATE TUESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of nine 
  inches or more possible, especially on the Tug Hill Plateau.

* WHERE...Jefferson and Lewis counties.

* WHEN...From Tuesday morning through late Tuesday night.

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Begin needed preparations at home or with your vehicle. Travel
may become difficult, so plan accordingly.

&&

$$

474 
WWUS41 KBUF 181401
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
901 AM EST Mon Jan 18 2021

NYZ012-019-020-085-182215-
/O.CON.KBUF.LE.W.0001.000000T0000Z-210119T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
901 AM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
TUESDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations of
  6 to 14 inches in the most persistent lake snows.

* WHERE...Wyoming, Chautauqua, Cattaraugus, and Southern Erie 
  counties. The greatest snow accumulations will extend from the
  Chautauqua Ridge to the Boston Hills, with less accumulation 
  south of a Jamestown to Ellicottville line.

* WHEN...Until 7 AM EST Tuesday.

* IMPACTS...Travel could be very difficult, especially across 
  the higher terrain. The hazardous conditions will likely 
  impact the morning and evening commutes.

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...4231 7865 4246 7863 4247 7898 4243 7923 
        4241 7955 4232 7975 4199 7977 4201 7923 4200 7891 
        4211 7886 
TIME Y21M01D18T1200Z-Y21M01D18T1800Z
COORD...4264 7842 4269 7853 4271 7897 4266 7913 
        4232 7975 4199 7977 4204 7929 4224 7887 4225 7875 
        4236 7852 
TIME Y21M01D18T1800Z-Y21M01D19T0000Z
COORD...4260 7801 4280 7806 4279 7884 4268 7913 
        4232 7975 4199 7977 4210 7928 4224 7905 4232 7870 
        4246 7839 
TIME Y21M01D19T0000Z-Y21M01D19T0600Z
COORD...4277 7798 4287 7811 4286 7847 4279 7893 
        4241 7958 4238 7947 4244 7914 4254 7879 4259 7840 
        4258 7822 
TIME Y21M01D19T0600Z-Y21M01D19T1200Z

$$

NYZ021-182215-
/O.CON.KBUF.WW.Y.0004.000000T0000Z-210119T1000Z/
Allegany-
Including the city of Wellsville
901 AM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST
TUESDAY...

* WHAT...Snow. Additional snow accumulations of 4 to 7 inches.

* WHERE...Allegany county.

* WHEN...Until 5 AM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel 
  could be difficult across the higher terrain north and west of 
  Belmont. The hazardous conditions could impact the morning and 
  evening commutes.

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.

&&

$$

NYZ010-182215-
/O.CON.KBUF.WW.Y.0004.210118T2300Z-210120T0000Z/
Northern Erie-
Including the city of Buffalo
901 AM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM THIS
EVENING TO 7 PM EST TUESDAY...

* WHAT...Snow expected. Total snow accumulations of 5 to 9 
  inches.

* WHERE...Northern Erie county.

* WHEN...From 6 PM this evening to 7 PM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, although travel 
  could be difficult in the vicinity of the Southtowns and 
  especially in the higher terrain. The hazardous conditions 
  could impact the Tuesday morning and evening commutes.

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.

&&

$$

NYZ007-008-182215-
/O.CON.KBUF.WS.A.0002.210119T1500Z-210120T1100Z/
Jefferson-Lewis-
Including the cities of Watertown and Lowville
901 AM EST Mon Jan 18 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH LATE TUESDAY NIGHT...

* WHAT...Heavy snow possible. Total snow accumulations of nine 
  inches or more possible, especially on the Tug Hill Plateau.

* WHERE...Jefferson and Lewis counties.

* WHEN...From Tuesday morning through late Tuesday night.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Begin needed preparations at home or with your vehicle. Travel
may become difficult, so plan accordingly.

&&

$$
JLA

252 
WWUS41 KBUF 181828
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
128 PM EST Mon Jan 18 2021

NYZ007-008-190300-
/O.UPG.KBUF.WS.A.0002.210119T1500Z-210120T1100Z/
/O.NEW.KBUF.LE.W.0002.210119T1500Z-210120T1200Z/
Jefferson-Lewis-
Including the cities of Watertown and Lowville
128 PM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 10 AM TUESDAY TO 7 AM
EST WEDNESDAY...

* WHAT...Heavy lake effect snow expected. Total snow accumulations
  of 6 to 12 inches in the most persistent lake snows. The most
  persistent and heaviest snow is expected on the Tug Hill 
  Plateau Tuesday afternoon and Tuesday night.

* WHERE...Jefferson and Lewis counties.

* WHEN...From 10 AM Tuesday to 7 AM EST Wednesday.

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

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...4399 7547 4420 7561 4418 7604 4408 7639 
        4386 7637 4383 7629 4370 7623 4357 7625 4363 7555 
        4366 7548 
TIME Y21M01D19T1500Z-Y21M01D19T2100Z
COORD...4386 7529 4409 7542 4408 7576 4398 7598 
        4384 7617 4372 7622 4365 7617 4356 7595 4348 7561 
        4379 7542 
TIME Y21M01D19T2100Z-Y21M01D20T0600Z
COORD...4342 7586 4352 7539 4362 7545 4356 7643 
        4336 7677 4331 7695 4323 7679 4322 7626 4328 7620 
        4318 7590 
TIME Y21M01D20T0600Z-Y21M01D20T1200Z

$$

NYZ006-190300-
/O.NEW.KBUF.LE.W.0002.210119T1500Z-210120T1200Z/
Oswego-
Including the city of Oswego
128 PM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 10 AM TUESDAY TO 7 AM
EST WEDNESDAY...

* WHAT...Heavy lake effect snow expected. Total snow accumulations
  of 6 to 12 inches in the most persistent lake snows. The most
  persistent and heaviest snow will occur on the Tug Hill Plateau
  Tuesday afternoon through Tuesday night.

* WHERE...Oswego county.

* WHEN...From 10 AM Tuesday to 7 AM EST Wednesday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute.

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...4399 7547 4420 7561 4418 7604 4408 7639 
        4386 7637 4383 7629 4370 7623 4357 7625 4363 7555 
        4366 7548 
TIME Y21M01D19T1500Z-Y21M01D19T2100Z
COORD...4386 7529 4409 7542 4408 7576 4398 7598 
        4384 7617 4372 7622 4365 7617 4356 7595 4348 7561 
        4379 7542 
TIME Y21M01D19T2100Z-Y21M01D20T0600Z
COORD...4342 7586 4352 7539 4362 7545 4356 7643 
        4336 7677 4331 7695 4323 7679 4322 7626 4328 7620 
        4318 7590 
TIME Y21M01D20T0600Z-Y21M01D20T1200Z

$$

NYZ010-190300-
/O.UPG.KBUF.WW.Y.0004.210118T2300Z-210120T0000Z/
/O.EXB.KBUF.LE.W.0001.210118T2300Z-210120T0000Z/
Northern Erie-
Including the city of Buffalo
128 PM EST Mon Jan 18 2021

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

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

* WHERE...Northern Erie county. The greatest snow amounts in
  northern portions of Erie county will occur from Lackawanna and
  Blasdell to West Seneca, Elma and Marilla and points southward.

* WHEN...From 6 PM this evening to 7 PM EST Tuesday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the Tuesday morning and evening commutes.

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...4268 7817 4290 7811 4281 7890 4232 7975 
        4214 7977 4215 7956 4228 7934 4231 7916 4247 7877 
        4248 7862 
TIME Y21M01D19T0300Z-Y21M01D19T0900Z
COORD...4277 7819 4286 7817 4285 7856 4287 7856 
        4279 7893 4268 7913 4257 7891 4256 7855 4268 7841 
        4271 7826 
TIME Y21M01D19T0900Z-Y21M01D20T0000Z

$$

NYZ012-019-020-085-190300-
/O.CON.KBUF.LE.W.0001.000000T0000Z-210119T1200Z/
Wyoming-Chautauqua-Cattaraugus-Southern Erie-
Including the cities of Warsaw, Jamestown, Olean, Orchard Park, 
and Springville
128 PM EST Mon Jan 18 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 7 AM EST
TUESDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations of
  5 to 8 inches in the most persistent lake snows. Additional lake
  effect snow is expected Tuesday and beyond, so this warning may
  need to be adjusted later.

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

* WHEN...Until 7 AM EST Tuesday. 

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

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...4264 7842 4269 7853 4271 7897 4266 7913 
        4232 7975 4199 7977 4204 7929 4224 7887 4225 7875 
        4236 7852 
TIME Y21M01D18T1800Z-Y21M01D19T0300Z
COORD...4268 7817 4290 7811 4281 7890 4232 7975 
        4214 7977 4215 7956 4228 7934 4231 7916 4247 7877 
        4248 7862 
TIME Y21M01D19T0300Z-Y21M01D19T0900Z
COORD...4250 7853 4252 7850 4250 7859 4254 7850 
        4252 7859 4250 7862 4247 7877 4245 7878 4247 7869 
        4244 7869 4248 7862 
TIME Y21M01D19T0300Z-Y21M01D19T0900Z
COORD...4277 7819 4286 7817 4285 7856 4287 7856 
        4279 7893 4268 7913 4257 7891 4256 7855 4268 7841 
        4271 7826 
TIME Y21M01D19T0900Z-Y21M01D20T0000Z

$$

NYZ011-190300-
/O.EXB.KBUF.WW.Y.0004.210119T0000Z-210120T0000Z/
Genesee-
Including the city of Batavia
128 PM EST Mon Jan 18 2021

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

* WHAT...Lake effect snow expected. Total snow accumulations of 5
  to 10 inches in the most persistent lake snows. 

* WHERE...Genesee county. The most snow will occur over far
  southwest portions of the county, to the south of Corfu.

* WHEN...From 7 PM this evening to 7 PM EST Tuesday.

* IMPACTS...Travel could be very difficult. Areas of blowing snow
  could significantly reduce visibility. The hazardous conditions
  could impact the Tuesday morning and evening commutes.

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.

&&

$$

NYZ021-190300-
/O.CON.KBUF.WW.Y.0004.000000T0000Z-210119T1000Z/
Allegany-
Including the city of Wellsville
128 PM EST Mon Jan 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM EST
TUESDAY...

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

* WHERE...Allegany county.

* WHEN...Until 5 AM EST Tuesday.

* IMPACTS...Plan on slippery road conditions, especially over the
  northwest portion of Allegany county. The hazardous conditions 
  could impact the evening commute.

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 8:57 PM EST	Special Weather Statement	BUF	Erie	108 min
Jan 18, 3:25 AM EST	Winter Weather Advisory	BUF	Allegany, Cattaraugus, Erie, Genesee	39 hr
Jan 18, 3:35 AM EST	Small Craft Advisory	BUF		4 days
Jan 18, 1:28 PM EST	Lake Effect Snow Warning	BUF	Jefferson, Lewis, Oswego	41 hr

Nearby

Winter Storm Watches in New York, 2021 Every winter storm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.