Alert archive / Pennsylvania / Winter Storm Watches in 2021

Winter Storm Watch 2, NWS Cleveland, OH

November 18, 2021Crawford County, Erie County, Pennsylvania; Ashtabula County, Geauga County, Ohio

NWS Cleveland, OH issued this winter storm watch at Nov 18, 2021, 3:07 AM EST for Crawford County, Erie County, Pennsylvania; Ashtabula County, Geauga County, Ohio. It took effect at Nov 18, 2021, 7:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued
Nov 18, 2021, 3:07 AM EST (08:07 UTC)
In effect from
Nov 18, 2021, 7:00 PM EST
Expired
Nov 18, 2021, 1:03 PM EST
In force
Issued by
NWS Cleveland, OH

Counties Ashtabula County, OH, Geauga County, OH, Crawford County, PA, Erie County, PA

The radar

The Cleveland radar (KCLE), 118 km from the middle of the area, began a volume at 08:09 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

Pittsburgh, PA (KPIT), launched 00:00Z, 8.1 hours before the alert went out and 159 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, Pittsburgh, PA at 00:00Z on 2021-11-18Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2021-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 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
1415 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
306 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

743 
WWUS41 KCLE 180807
WSWCLE

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cleveland OH
307 AM EST Thu Nov 18 2021

OHZ011-012-089-PAZ001-181615-
/O.NEW.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Cuyahoga-Lake-Ashtabula Lakeshore-Northern Erie-
Including the cities of Cleveland, Mentor, Willoughby, Eastlake, 
Painesville, Willowick, Wickliffe, Ashtabula, Conneaut, Geneva, 
and Erie
307 AM EST Thu Nov 18 2021

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

* WHAT...Lake effect snow expected. Total snow accumulations of 3
  to 5 inches.

* WHERE...In Pennsylvania, Northern Erie county. In Ohio, 
  Cuyahoga, Lake and Ashtabula Lakeshore counties.

* WHEN...From 7 PM this evening to noon EST Friday. The period of
  heaviest snow will be between midnight and 7 AM Friday morning.

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

* Additional Details...Temperatures will drop into the lower 30s
  and will likely cause road surfaces; especially bridges and
  overpasses to cool enough to allow snow to accumulate. 
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for Ohio can be obtained by calling 5 
1 1.

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway, and
traffic conditions.

&&

$$

OHZ013-014-PAZ002-003-181615-
/O.NEW.KCLE.WS.A.0002.211119T0000Z-211119T1700Z/
Geauga-Ashtabula Inland-Southern Erie-Crawford-
Including the cities of Chardon, South Russell, Bainbridge, 
Chesterland, Middlefield, Burton, Jefferson, Orwell, Andover, 
Roaming Shores, Edinboro, Corry, Union City, Meadville, 
and Titusville
307 AM EST Thu Nov 18 2021

...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH FRIDAY
MORNING...

* WHAT...Heavy lake effect snow possible. Total snow 
  accumulations of 4 to 7 inches possible.

* WHERE...In Pennsylvania, Southern Erie and Crawford counties. 
  In Ohio, Geauga and Ashtabula Inland counties.

* WHEN...From this evening through Friday morning. The period of
  heaviest snow will be between midnight and 7 AM Friday morning.

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

* ADDITIONAL DETAILS...Temperatures will drop into the upper 20s
  and lower 30s and will likely cause road surfaces; especially 
  bridges and overpasses to cool enough to allow snow to 
  accumulate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

For more information from the National Weather Service visit
http://www.weather.gov/cle
2 follow-up statements
135 
WWUS41 KCLE 181103
WSWCLE

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cleveland OH
603 AM EST Thu Nov 18 2021

OHZ011-012-089-181915-
/O.CON.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Cuyahoga-Lake-Ashtabula Lakeshore-
Including the cities of Cleveland, Mentor, Willoughby, Eastlake, 
Painesville, Willowick, Wickliffe, Ashtabula, Conneaut, 
and Geneva
603 AM EST Thu Nov 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO NOON EST FRIDAY...

* WHAT...Lake effect snow expected. Total snow accumulations of 
  3 to 5 inches.

* WHERE...In Pennsylvania, Northern Erie county. In Ohio, 
  Cuyahoga, Lake and Ashtabula Lakeshore counties.

* WHEN...From 7 PM this evening to noon EST Friday. The period 
  of heaviest snow will be between midnight and 7 AM Friday 
  morning.

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

* ADDITIONAL DETAILS...Temperatures will drop into the lower 30s 
  and will likely cause road surfaces; especially bridges and 
  overpasses to cool enough to allow snow to accumulate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

PAZ001-181915-
/O.CON.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Northern Erie-
Including the city of Erie
603 AM EST Thu Nov 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO NOON EST FRIDAY...

* WHAT...Lake effect snow expected. Total snow accumulations of 
  3 to 5 inches.

* WHERE...In Pennsylvania, Northern Erie county. In Ohio, 
  Cuyahoga, Lake and Ashtabula Lakeshore counties.

* WHEN...From 7 PM this evening to noon EST Friday. The period 
  of heaviest snow will be between midnight and 7 AM Friday 
  morning.

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

* ADDITIONAL DETAILS...Temperatures will drop into the lower 30s 
  and will likely cause road surfaces; especially bridges and 
  overpasses to cool enough to allow snow to accumulate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway, and
traffic conditions.

&&

$$

OHZ013-014-PAZ002-003-181915-
/O.CON.KCLE.WS.A.0002.211119T0000Z-211119T1700Z/
Geauga-Ashtabula Inland-Southern Erie-Crawford-
Including the cities of Chardon, South Russell, Bainbridge, 
Chesterland, Middlefield, Burton, Jefferson, Orwell, Andover, 
Roaming Shores, Edinboro, Corry, Union City, Meadville, 
and Titusville
603 AM EST Thu Nov 18 2021

...WINTER STORM WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH
FRIDAY MORNING...

* WHAT...Heavy lake effect snow possible. Total snow 
  accumulations of 4 to 7 inches possible.

* WHERE...In Pennsylvania, Southern Erie and Crawford counties. 
  In Ohio, Geauga and Ashtabula Inland counties.

* WHEN...From this evening through Friday morning. The period of 
  heaviest snow will be between midnight and 7 AM Friday morning.

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

* ADDITIONAL DETAILS...Temperatures will drop into the upper 20s 
  and lower 30s and will likely cause road surfaces; especially 
  bridges and overpasses to cool enough to allow snow to 
  accumulate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation. 

&&

$$

For more information from the National Weather Service visit
http://www.weather.gov/cle
331 
WWUS41 KCLE 181803
WSWCLE

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cleveland OH
103 PM EST Thu Nov 18 2021

OHZ089-PAZ001-181915-
/O.CAN.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Ashtabula Lakeshore-Northern Erie-
Including the cities of Ashtabula, Conneaut, Geneva, and Erie
103 PM EST Thu Nov 18 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Warmer air temperatures near Lake Erie will delay the transition
of lake effect precipitation from rain to snow tonight in areas 
north of Interstate 90 in Ashtabula and Erie Counties. Once rain 
changes over to snow overnight, snowfall is expected to be in a 
low ratio form and graupel in nature, which will limit 
accumulations. Therefore, will reduce the forecast for these areas
to a slushy inch overnight and cancel the Winter Weather Advisory
for higher snowfall amounts, as they are no longer expected.

$$

OHZ013-014-190400-
/O.UPG.KCLE.WS.A.0002.211119T0000Z-211119T1700Z/
/O.EXA.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Geauga-Ashtabula Inland-
Including the cities of Chardon, South Russell, Bainbridge, 
Chesterland, Middlefield, Burton, Jefferson, Orwell, Andover, 
and Roaming Shores
103 PM EST Thu Nov 18 2021

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

* WHAT...Lake effect snow expected. Total snow accumulations of 2
  to 5 inches. Locally higher amounts to 6 inches are possible in
  northern Geauga County.

* WHERE...Geauga and Ashtabula Inland counties.

* WHEN...From 7 PM this evening to noon EST Friday.

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

* ADDITIONAL DETAILS...Snowfall rates of one inch per hour are
  possible overnight, which could allow for snowfall to accumulate
  on area roadways. A band of snow may persist through the eastern
  suburbs of Cleveland into Geauga County for the Friday morning
  commute, which may cause hazardous road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

PAZ002-003-190400-
/O.UPG.KCLE.WS.A.0002.211119T0000Z-211119T1700Z/
/O.EXA.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Southern Erie-Crawford-
Including the cities of Edinboro, Corry, Union City, Meadville, 
and Titusville
103 PM EST Thu Nov 18 2021

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

* WHAT...Lake effect snow expected. Total snow accumulations of 3
  to 5 inches. Locally higher amounts to 6 inches are possible in
  southeastern Erie County, south of Interstates 90 and 86 and
  east of Interstate 79.

* WHERE...Southern Erie and Crawford counties.

* WHEN...From 7 PM this evening to noon EST Friday.

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

* ADDITIONAL DETAILS...Snowfall rates of one inch per hour are
  possible overnight, which could allow for snowfall to accumulate
  on area roadways. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The Pennsylvania Department of Transportation and Pennsylvania
Turnpike Commission remind motorists to adjust speeds based on
driving conditions as winter weather impacts Pennsylvania
roadways. Visit www.511pa.com for the latest travel, roadway, and
traffic conditions.

&&

$$

OHZ011-012-190400-
/O.CON.KCLE.WW.Y.0014.211119T0000Z-211119T1700Z/
Cuyahoga-Lake-
Including the cities of Cleveland, Mentor, Willoughby, Eastlake, 
Painesville, Willowick, and Wickliffe
103 PM EST Thu Nov 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS
EVENING TO NOON EST FRIDAY...

* WHAT...Lake effect snow expected. Total snow accumulations of 2
  to 5 inches. In Lake County, the highest snowfall totals are
  expected south of Interstate 90. In Cuyahoga County, the highest
  snowfall totals are expected east of Interstate 77 and
  especially east of Interstate 271. 

* WHERE...Lake and Cuyahoga counties.

* WHEN...From 7 PM this evening to noon EST Friday.

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

* ADDITIONAL DETAILS...Snowfall rates of one inch per hour are
  possible overnight, which could allow for snowfall to accumulate
  on area roadways. A band of snow may persist through the eastern
  suburbs of Cleveland for the Friday morning commute, which may 
  cause hazardous road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

&&

$$

For more information from the National Weather Service visit
http://www.weather.gov/cle

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 18, 3:07 AM ESTWinter Weather AdvisoryCLECrawford, Erie30 hr
Nov 18, 5:44 PM ESTGale WarningCLE5 hr
Nov 18, 5:44 PM ESTLow Water AdvisoryCLE6 hr

Nearby

Winter Storm Watches in Pennsylvania, 2021Winter Storm Watches in Ohio, 2021Every 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.