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

Lake Effect Snow Warning 11, NWS Buffalo, NY

November 28, 2021Cattaraugus County, Chautauqua County, New York

NWS Buffalo, NY issued this lake effect snow warning at Nov 28, 2021, 10:13 AM EST for Cattaraugus County, Chautauqua County, New York. It took effect at Nov 28, 2021, 1:00 PM EST. It was in force for 15 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 28, 2021, 10:13 AM EST (15:13 UTC)
In effect from
Nov 28, 2021, 1:00 PM EST
Expired
Nov 29, 2021, 4:17 AM EST
In force
15 hr
Issued by
NWS Buffalo, NY

Counties Cattaraugus County, NY, Chautauqua County, NY

The radar

The Buffalo radar (KBUF), 79 km from the middle of the area, began a volume at 15:19 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
Nov 28, 5:00 PM ESTSNOW 56 Sw Forestville, NY
Nov 28, 8:00 PM ESTSNOW 3.5Perrysburg, NY
Nov 28, 9:00 PM ESTSNOW 45 E Great Valley, NY
Nov 28, 9:15 PM ESTSNOW 4East Otto, NY
Nov 28, 9:15 PM ESTSNOW 92 Ene Findley Lake, NY
Nov 28, 9:30 PM ESTSNOW 12Cattaraugus, NY
Nov 28, 10:00 PM ESTSNOW 15.3Cherry Creek, NY
Nov 28, 10:00 PM ESTSNOW 17Cattaraugus, NY
Nov 28, 10:30 PM ESTSNOW 10.21 Ne Jamestown, NY
Nov 28, 11:06 PM ESTSNOW 13Dayton, NY
Nov 29, 1:00 AM ESTSNOW 14South Dayton, NY

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, 3.2 hours before the alert went out and 78 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 12:00Z on 2021-11-28Temperature 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 12:00Z on 2021-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 square meters per square second.19395878Sfc1 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
525 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

726 
WWUS41 KBUF 281513
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
1013 AM EST Sun Nov 28 2021

NYZ019-290000-
/O.UPG.KBUF.WW.Y.0024.211128T1800Z-211129T1200Z/
/O.NEW.KBUF.LE.W.0011.211128T1800Z-211129T1200Z/
Chautauqua-
Including the city of Jamestown
1013 AM EST Sun Nov 28 2021

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 7 AM EST MONDAY...

* WHAT...Heavy lake effect snow expected. Additional snow
  accumulations of 5 to 10 inches in the most persistent lake
  snows. The heaviest snow will occur late this afternoon through
  this evening on the Chautauqua Ridge. Patchy blowing snow is 
  possible in open areas. 

* WHERE...Chautauqua county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Travel could be very difficult, including along the
  I-90 corridor. The hazardous conditions could also impact the 
  morning commute on Monday.

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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4239 7908 4247 7919 4241 7934 4225 7976 
        4199 7977 4201 7947 4199 7929 4207 7919 4214 7918 
        4215 7912 
TIME Y21M11D26T1500Z-Y21M11D27T0000Z
COORD...4242 7914 4242 7941 4234 7954 4230 7954 
        4223 7976 4199 7977 4201 7947 4200 7931 4204 7931 
        4213 7912 
TIME Y21M11D27T0000Z-Y21M11D27T1200Z

$$

NYZ020-085-290000-
/O.CON.KBUF.WW.Y.0024.211128T1800Z-211129T1200Z/
Cattaraugus-Southern Erie-
Including the cities of Olean, Orchard Park, and Springville
1013 AM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

* WHAT...Lake effect snow expected. Additional snow accumulations
  of 4 to 8 inches in the most persistent lake snows. The most
  snow will occur late this afternoon into this evening from the
  Boston Hills to the higher terrain across Cattaraugus county.

* WHERE...Cattaraugus and Southern Erie counties.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions this afternoon and 
  tonight, however difficult driving conditions could be found 
  across the higher terrain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If traveling, be prepared for rapidly changing road conditions
and visibilities.

Submit snow reports through our website or social media.

&&

$$
JLA
5 follow-up statements
396 
WWUS41 KBUF 282031
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
331 PM EST Sun Nov 28 2021

NYZ020-290500-
/O.UPG.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
/O.EXA.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Cattaraugus-
Including the city of Olean
331 PM EST Sun Nov 28 2021

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 7 AM EST MONDAY...

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

* WHERE...Cattaraugus county, mainly northern and western portions
  of the county.

* WHEN...Until 7 AM EST Monday. The heaviest snow will occur late
  this afternoon and early this evening.

* IMPACTS...Travel could be very difficult, including along the
  I-90 corridor. 

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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ019-290500-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Chautauqua-
Including the city of Jamestown
331 PM EST Sun Nov 28 2021

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

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

* WHERE...Chautauqua county.

* WHEN...Until 7 AM EST Monday. The heaviest snow will occur late
  this afternoon and early this evening.

* IMPACTS...Travel could be very difficult. The hazardous 
  conditions could impact the 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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ085-290500-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Southern Erie-
Including the cities of Orchard Park and Springville
331 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

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

* WHERE...Southern Erie county.

* WHEN...Until 7 AM EST Monday.

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

&&

$$

Apffel
474 
WWUS41 KBUF 282205
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
505 PM EST Sun Nov 28 2021

NYZ019-290700-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Chautauqua-
Including the city of Jamestown
505 PM EST Sun Nov 28 2021

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

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

* WHERE...Chautauqua county.

* WHEN...Until 7 AM EST Monday. The heaviest snow will occur
  through this evening.

* IMPACTS...Travel could be very difficult, including along the I-
  90 corridor and the Southern Tier Expressway.

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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ020-290700-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Cattaraugus-
Including the city of Olean
505 PM EST Sun Nov 28 2021

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

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

* WHERE...Cattaraugus county, mainly in northern and western 
  portions of the county.

* WHEN...Until 7 AM EST Monday. The heaviest snow will occur
  through this evening.

* IMPACTS...Travel could be very difficult tonight.

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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ021-290700-
/O.EXA.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Allegany-
Including the city of Wellsville
505 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM EST MONDAY...

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

* WHERE...Allegany county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions tonight.

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.

&&

$$

NYZ085-290700-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Southern Erie-
Including the cities of Orchard Park and Springville
505 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

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

* WHERE...Southern Erie county.

* WHEN...Until 7 AM EST Monday.

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

&&

$$

Apffel
046 
WWUS41 KBUF 290044
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
744 PM EST Sun Nov 28 2021

NYZ085-290145-
/O.CAN.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Southern Erie-
Including the cities of Orchard Park and Springville
744 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

An additional inch of snow is possible overnight, with some slick
spots possible on roadways.

$$

NYZ019-290900-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Chautauqua-
Including the city of Jamestown
744 PM EST Sun Nov 28 2021

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

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

* WHERE...Chautauqua county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the 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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ020-290900-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Cattaraugus-
Including the city of Olean
744 PM EST Sun Nov 28 2021

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

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

* WHERE...Cattaraugus county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the 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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ021-290900-
/O.CON.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Allegany-
Including the city of Wellsville
744 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
MONDAY...

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

* WHERE...Allegany county.

* WHEN...Until 7 AM EST Monday.

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

&&

$$

Apffel
478 
WWUS41 KBUF 290231
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
931 PM EST Sun Nov 28 2021

NYZ021-290345-
/O.CAN.KBUF.WW.Y.0024.000000T0000Z-211129T1200Z/
Allegany-
Including the city of Wellsville
931 PM EST Sun Nov 28 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Roads still may be slick in spots overnight.

$$

NYZ019-291200-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Chautauqua-
Including the city of Jamestown
931 PM EST Sun Nov 28 2021

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

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

* WHERE...Chautauqua county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the 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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

NYZ020-291200-
/O.CON.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Cattaraugus-
Including the city of Olean
931 PM EST Sun Nov 28 2021

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

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

* WHERE...Cattaraugus county.

* WHEN...Until 7 AM EST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the 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
To view the experimental polygons please see:
http://www.weather.gov/buf/lespolygon
COORD...4244 7869 4244 7908 4251 7918 4239 7956 
        4230 7975 4199 7977 4205 7923 4210 7922 4221 7898 
        4225 7869 
TIME Y21M11D28T1800Z-Y21M11D29T0000Z
COORD...4229 7863 4240 7893 4242 7938 4235 7959 
        4221 7976 4199 7977 4201 7950 4209 7913 4206 7884 
        4216 7865 
TIME Y21M11D29T0000Z-Y21M11D29T1200Z

$$

Apffel
764 
WWUS41 KBUF 290917
WSWBUF

URGENT - WINTER WEATHER MESSAGE
National Weather Service Buffalo NY
417 AM EST Mon Nov 29 2021

NYZ019-020-291030-
/O.CAN.KBUF.LE.W.0011.000000T0000Z-211129T1200Z/
Chautauqua-Cattaraugus-
Including the cities of Jamestown and Olean
417 AM EST Mon Nov 29 2021

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

While additional light snows will accumulate an inch or so across
parts of the area today...significant lake snows are no longer
expected.

Motorists should remain vigilant though for untreated roadways
that may be snow covered and slick. This will especially be the
case across the higher terrain. Maintain a safe distance between
yourself and other vehicles.

$$

RSH

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 27, 10:18 PM ESTSmall Craft AdvisoryBUF30 hr
Nov 28, 12:03 PM ESTSpecial Weather StatementBUFErie87 min
Nov 28, 1:59 PM ESTSpecial Weather StatementBUFNiagara61 min
Nov 28, 3:00 PM ESTSpecial Weather StatementBUFCattaraugus, Chautauqua90 min
Nov 28, 4:26 PM ESTSpecial Weather StatementBUFCattaraugus, Chautauqua94 min
Nov 28, 6:06 PM ESTSpecial Weather StatementBUFAllegany, Cattaraugus, Chautauqua84 min

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.