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

Lake Effect Snow Warning 8, NWS Buffalo, NY

February 9, 2021Cayuga County, Oswego County, New York

NWS Buffalo, NY issued this lake effect snow warning at Feb 9, 2021, 3:42 AM EST for Cayuga County, Oswego County, New York. It took effect at Feb 9, 2021, 10:00 PM EST. It was in force for 30 hr. 22 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 9, 2021, 3:42 AM EST (08:42 UTC)
In effect from
Feb 9, 2021, 10:00 PM EST
Expired
Feb 11, 2021, 4:00 AM EST
In force
30 hr
Issued by
NWS Buffalo, NY

Counties Cayuga County, NY, Oswego County, NY

The radar

The Ft Drum radar (KTYX), 81 km from the middle of the area, began a volume at 08:43 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
Feb 10, 12:10 AM ESTSNOW 1.54 Se Lacona, NY
Feb 10, 6:00 AM ESTSNOW 6.32 Nne Richland, NYCOCORAHS STATION NY-OS-1 LACONA 3.6 SSE.
Feb 10, 6:50 AM ESTSNOW 12 N Cayuga, NY24-HOUR SNOWFALL.
Feb 10, 6:50 AM ESTSNOW 5Pulaski, NYSOCIAL MEDIA REPORT.
Feb 10, 7:00 AM ESTSNOW 12 Ne Willets, NY24-HOUR SNOWFALL.
Feb 10, 7:00 AM ESTSNOW 14 Nne Cayuga, NY24-HOUR SNOWFALL.
Feb 10, 7:00 AM ESTSNOW 4.18 N Redfield, NYCO-OP OBSERVER STATION RDFN6 REDFIELD 8N.
Feb 10, 7:00 AM ESTSNOW 5.21 Se Fulton, NYCO-OP OBSERVER STATION FUTN6 FULTON.
Feb 10, 7:00 AM ESTSNOW 74 E Oswego, NYREPORTED IN SCRIBA. SOCIAL MEDIA REPORT.
Feb 10, 7:00 AM ESTSNOW 8.52 Sw Mexico, NYCO-OP OBSERVER STATION MXON6 MEXICO 2SW.
Feb 10, 7:15 AM ESTSNOW 6.52 Wsw Oswego, NYSUNY OSWEGO.
Feb 10, 7:45 AM ESTSNOW 7.52 Nnw Orwell, NY
Feb 10, 8:00 AM ESTSNOW 10.4Minetto, NYCOCORAHS STATION NY-OS-15 MINETTO 0.1 SE.
Feb 10, 8:20 AM ESTSNOW 82 Wsw Oswego, NYSUNY OSWEGO.
Feb 10, 9:00 AM ESTSNOW 6.3Pulaski, NYSOCIAL MEDIA REPORT.
Feb 10, 10:20 AM ESTSNOW 9.72 Wsw Oswego, NYSUNY OSWEGO.
Feb 10, 11:00 AM ESTSNOW 5.32 N Richland, NY
Feb 10, 11:15 AM ESTSNOW 11Oswego, NYSOCIAL MEDIA REPORT.
Feb 10, 11:20 AM ESTSNOW 10.12 Wsw Oswego, NYSUNY OSWEGO.
Feb 10, 11:49 AM ESTSNOW 9Altmar, NYSOCIAL MEDIA REPORT.
Feb 10, 12:55 PM ESTSNOW 11.22 Wsw Oswego, NYSUNY OSWEGO.
Feb 10, 2:54 PM ESTSNOW 8.5Pulaski, NYSOCIAL MEDIA REPORT.

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, 8.7 hours before the alert went out and 191 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 2021-02-09Temperature 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 2021-02-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.1939587897117136156Sfc1 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
988 m above ground
0-6 km bulk shear
105 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

450 
WWUS41 KBUF 090842
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
342 AM EST Tue Feb 9 2021

NYZ005-006-091645-
/O.UPG.KBUF.WS.A.0004.210210T0300Z-210211T0900Z/
/O.NEW.KBUF.LE.W.0008.210210T0300Z-210211T0900Z/
Northern Cayuga-Oswego-
Including the cities of Fair Haven and Oswego
342 AM EST Tue Feb 9 2021

...LAKE EFFECT SNOW WARNING IN EFFECT FROM 10 PM THIS EVENING TO
4 AM EST THURSDAY...

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

* WHERE...Northern Cayuga and Oswego counties.

* WHEN...From 10 PM this evening to 4 AM EST Thursday.

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

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...4345 7591 4350 7598 4353 7629 4347 7642 
        4345 7642 4344 7654 4336 7656 4333 7631 4332 7600 
        4336 7593 
TIME Y21M02D10T0300Z-Y21M02D10T0900Z
COORD...4339 7622 4344 7633 4347 7654 4341 7664 
        4337 7665 4335 7670 4331 7672 4328 7663 4325 7637 
        4328 7623 
TIME Y21M02D10T0900Z-Y21M02D10T1500Z
COORD...4347 7615 4347 7618 4352 7620 4351 7629 
        4352 7644 4341 7664 4336 7662 4333 7631 4336 7631 
        4341 7616 
TIME Y21M02D10T1500Z-Y21M02D10T2100Z
COORD...4344 7630 4350 7647 4341 7664 4337 7665 
        4335 7670 4329 7672 4326 7667 4325 7640 4329 7630 
        4333 7627 
TIME Y21M02D10T2100Z-Y21M02D11T0900Z

$$

TMA
6 follow-up statements
019 
WWUS41 KBUF 091639
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1139 AM EST Tue Feb 9 2021

NYZ005-006-100045-
/O.CON.KBUF.LE.W.0008.210210T0300Z-210211T0900Z/
Northern Cayuga-Oswego-
Including the cities of Fair Haven and Oswego
1139 AM EST Tue Feb 9 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 4 AM EST THURSDAY...

* WHAT...Heavy lake effect snow expected. Total snow 
  accumulations of 8 to 14 inches in the most persistent lake 
  snows.

* WHERE...Northern Cayuga and Oswego counties. Greatest
  accumulations expected across central and western Oswego County
  and far northern Cayuga County.

* WHEN...From 10 PM this evening to 4 AM EST Thursday.

* IMPACTS...Travel will be very difficult at times with snow
  covered roads and poor visibility. The hazardous conditions
  could impact the morning or evening commute on Wednesday.

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...4353 7590 4361 7600 4363 7623 4355 7625 
        4356 7643 4340 7673 4336 7653 4333 7653 4331 7627 
        4340 7592 
TIME Y21M02D10T0300Z-Y21M02D10T0900Z
COORD...4337 7605 4346 7603 4349 7611 4347 7633 
        4349 7633 4349 7656 4336 7680 4333 7669 4325 7661 
        4322 7631 
TIME Y21M02D10T0900Z-Y21M02D10T1500Z
COORD...4362 7588 4365 7595 4365 7623 4357 7625 
        4356 7643 4354 7644 4349 7654 4341 7601 4347 7591 
        4353 7587 
TIME Y21M02D10T1500Z-Y21M02D11T0000Z
COORD...4356 7592 4355 7625 4359 7625 4356 7643 
        4336 7680 4331 7669 4331 7630 4333 7630 4335 7608 
        4343 7595 
TIME Y21M02D11T0000Z-Y21M02D11T0900Z

$$

Hitchcock
371 
WWUS41 KBUF 092048
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
348 PM EST Tue Feb 9 2021

NYZ005-006-100500-
/O.CON.KBUF.LE.W.0008.210210T0300Z-210211T0900Z/
Northern Cayuga-Oswego-
Including the cities of Fair Haven and Oswego
348 PM EST Tue Feb 9 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT FROM 10 PM THIS
EVENING TO 4 AM EST THURSDAY...

* WHAT...Heavy lake effect snow expected. Total snow 
  accumulations of 7 to 13 inches in the most persistent lake 
  snows.

* WHERE...Northern Cayuga and Oswego counties.

* WHEN...From 10 PM this evening to 4 AM EST Thursday.

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

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...4353 7590 4361 7600 4363 7623 4355 7625 
        4356 7643 4340 7673 4336 7653 4333 7653 4331 7627 
        4340 7592 
TIME Y21M02D10T0300Z-Y21M02D10T0900Z
COORD...4337 7605 4346 7603 4349 7611 4347 7633 
        4349 7633 4349 7656 4336 7680 4333 7669 4325 7661 
        4322 7631 
TIME Y21M02D10T0900Z-Y21M02D10T1500Z
COORD...4362 7588 4365 7595 4365 7623 4357 7625 
        4356 7643 4354 7644 4349 7654 4341 7601 4347 7591 
        4353 7587 
TIME Y21M02D10T1500Z-Y21M02D11T0000Z
COORD...4356 7592 4355 7625 4359 7625 4356 7643 
        4336 7680 4331 7669 4331 7630 4333 7630 4335 7608 
        4343 7595 
TIME Y21M02D11T0000Z-Y21M02D11T0900Z

$$
357 
WWUS41 KBUF 100854
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
354 AM EST Wed Feb 10 2021

NYZ005-006-101700-
/O.CON.KBUF.LE.W.0008.000000T0000Z-210211T0900Z/
Northern Cayuga-Oswego-
Including the cities of Fair Haven and Oswego
354 AM EST Wed Feb 10 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 4 AM EST
THURSDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 5 to 9 inches in the most persistent lake snows.

* WHERE...Northern Cayuga and Oswego counties.

* WHEN...Until 4 AM EST Thursday.

* IMPACTS...Travel could be very difficult at times with snow
  covered roads and poor visibility. The hazardous conditions
  could impact today's 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...4340 7589 4345 7600 4350 7647 4335 7670 
        4324 7667 4324 7645 4320 7647 4324 7606 4329 7606 
        4331 7591 
TIME Y21M02D10T0900Z-Y21M02D10T1500Z
COORD...4370 7580 4370 7601 4363 7620 4356 7622 
        4352 7644 4351 7629 4345 7636 4341 7604 4349 7593 
        4350 7578 
TIME Y21M02D10T1500Z-Y21M02D11T0000Z
COORD...4357 7583 4366 7584 4370 7601 4363 7620 
        4352 7623 4350 7644 4335 7670 4332 7656 4343 7619 
        4345 7597 
TIME Y21M02D11T0000Z-Y21M02D11T0900Z

$$

TMA
124 
WWUS41 KBUF 101705
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1205 PM EST Wed Feb 10 2021

NYZ005-101815-
/O.CAN.KBUF.LE.W.0008.000000T0000Z-210211T0900Z/
Northern Cayuga-
Including the city of Fair Haven
1205 PM EST Wed Feb 10 2021

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

Lake effect snow has moved north of Cayuga County.

$$

NYZ006-110115-
/O.CON.KBUF.LE.W.0008.000000T0000Z-210211T0900Z/
Oswego-
Including the city of Oswego
1205 PM EST Wed Feb 10 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 4 AM EST
THURSDAY...

* WHAT...Heavy lake effect snow. Additional snow accumulations 
  of 4 to 6 inches in the most persistent lake snows.

* WHERE...Oswego county. Greatest accumulations close to the Lake
  Ontario shore.

* WHEN...Until 4 AM EST Thursday.

* IMPACTS...Plan on snow covered and slippery road conditions with
  poor visibility at times. The hazardous conditions will impact 
  the 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...4361 7600 4361 7623 4355 7625 4356 7643 
        4343 7667 4341 7667 4339 7643 4337 7644 4334 7620 
        4343 7598 
TIME Y21M02D10T1700Z-Y21M02D10T2100Z
COORD...4359 7584 4365 7595 4367 7623 4357 7625 
        4356 7643 4355 7625 4354 7644 4348 7645 4343 7601 
        4350 7584 
TIME Y21M02D10T2100Z-Y21M02D11T0300Z
COORD...4357 7589 4365 7595 4367 7620 4355 7625 
        4356 7643 4345 7663 4337 7650 4335 7623 4335 7605 
        4339 7598 
TIME Y21M02D11T0300Z-Y21M02D11T0900Z

$$

Hitchcock
533 
WWUS41 KBUF 102124
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
424 PM EST Wed Feb 10 2021

NYZ006-110600-
/O.CON.KBUF.LE.W.0008.000000T0000Z-210211T0900Z/
Oswego-
Including the city of Oswego
424 PM EST Wed Feb 10 2021

...LAKE EFFECT SNOW WARNING REMAINS IN EFFECT UNTIL 4 AM EST
THURSDAY...

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

* WHERE...Oswego county.

* WHEN...Until 4 AM EST Thursday.

* IMPACTS...Plan on snow covered road conditions. The hazardous 
  conditions could impact the Thursday 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...4361 7600 4361 7623 4355 7625 4356 7643 
        4343 7667 4341 7667 4339 7643 4337 7644 4334 7620 
        4343 7598 
TIME Y21M02D10T1700Z-Y21M02D10T2100Z
COORD...4359 7584 4365 7595 4367 7623 4357 7625 
        4356 7643 4355 7625 4354 7644 4348 7645 4343 7601 
        4350 7584 
TIME Y21M02D10T2100Z-Y21M02D11T0300Z
COORD...4357 7589 4365 7595 4367 7620 4355 7625 
        4356 7643 4345 7663 4337 7650 4335 7623 4335 7605 
        4339 7598 
TIME Y21M02D11T0300Z-Y21M02D11T0900Z

$$
304 
WWUS41 KBUF 110856
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
Issued by National Weather Service Cleveland OH
356 AM EST Thu Feb 11 2021

NYZ006-111000-
/O.EXP.KBUF.LE.W.0008.000000T0000Z-210211T0900Z/
Oswego-
Including the city of Oswego
356 AM EST Thu Feb 11 2021

...LAKE EFFECT SNOW WARNING WILL EXPIRE AT 4 AM EST EARLY THIS
MORNING...

Scattered snow showers continue across Oswego County this morning
but are becoming more disorganized with time. An additional 1 to 2
inches of snow is possible across the county, primarily this
morning. However, with just minor accumulations expected, the Lake
Effect Snow Warning will be allowed to expire at 4 AM.

$$

Sefcovic

Nearby

Lake Effect Snow Warnings in New York, 2021Every 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.