Alert archive / Ohio / Special Weather Statements in 2018

Special Weather Statement, NWS Cleveland, OH

May 21, 2018Knox County, Ohio

NWS Cleveland, OH issued this special weather statement at May 21, 2018, 8:41 PM EDT for Knox County, Ohio. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 21, 2018, 8:41 PM EDT (00:41 UTC)
Expired: May 21, 2018, 9:45 PM EDT
In force: 64 min
Issued by: NWS Cleveland, OH

County Knox County, OH

The radar

The Cleveland radar (KCLE), 127 km from the middle of the area, began a volume at 00:45 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.7 hours before the alert went out and 151 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: 208 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1822 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Cleveland, OH wrote its last area forecast discussion before this special weather statement went out at May 21, 8:12 PM EDT, 29 minutes earlier.

Area forecast discussion, May 21, 8:12 PM EDT, 29 minutes before

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Hazardous weather outlook, May 21, 5:52 PM EDT, 2 hours 49 minutes before

Hazardous Weather Outlook
National Weather Service Cleveland OH
552 PM EDT Mon May 21 2018

LEZ061-142>149-162>169-OHZ003-006>014-018>023-029>033-038-047-089-
PAZ001>003-222200-
Lake Erie open waters from Ripley to Buffalo NY-
Lake Erie nearshore waters from Maumee Bay to Reno Beach OH-
Lake Erie nearshore waters from Reno Beach to The Islands OH-
Lake Erie nearshore waters from The Islands to Vermilion OH-
Lake Erie nearshore waters from Vermilion to Avon Point OH-
Lake Erie nearshore waters from Avon Point to Willowick OH-
Lake Erie nearshore waters from Willowick to Geneva-on-the Lake OH-
Lake Erie nearshore waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie nearshore waters from Conneaut OH to Ripley NY-
Lake Erie open waters from Maumee Bay to Reno Beach OH-
Lake Erie open waters from Reno Beach to The Islands OH-
Lake Erie open waters from The Islands to Vermilion OH-
Lake Erie open waters from Vermilion to Avon Point OH-
Lake Erie open waters from Avon Point to Willowick OH-
Lake Erie open waters from Willowick to Geneva-on-the-Lake OH-
Lake Erie open waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie open waters from Conneaut OH to Ripley NY-Lucas-Wood-
Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-Geauga-Ashtabula Inland-
Seneca-Huron-Medina-Summit-Portage-Trumbull-Richland-Ashland-Wayne-
Stark-Mahoning-Holmes-Knox-Ashtabula Lakeshore-Northern Erie-
Southern Erie-Crawford-
552 PM EDT Mon May 21 2018

This Hazardous Weather Outlook is for Lake Erie, north central
Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania.

.DAY ONE...Tonight.

Thunderstorms will move northeast across the forecast area this
evening. A few storms may become strong to severe. The greatest
threat will be from downburst winds, although an isolated tornado is
possible. The greatest threat will be southwest of a Mansfield to
Findlay line.

Spotter activation may be needed.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

OHZ017-027-028-036-037-222200-
Hancock-Wyandot-Crawford-Marion-Morrow-
552 PM EDT Mon May 21 2018

...SEVERE THUNDERSTORM WATCH 113 IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for north central Ohio and
northwest Ohio.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

Thunderstorms will move into Northwest Ohio this evening. A few
storms may become strong to severe. The greatest threat will be from
downburst winds, although an isolated tornado is possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

In the hours before

Special weather statement, May 21, 5:26 PM EDT, 3 hours 15 minutes before

Special Weather Statement
National Weather Service Cleveland OH
526 PM EDT MON MAY 21 2018

OHZ017-027-212230-
Wyandot-Hancock-
526 PM EDT MON MAY 21 2018

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT WESTERN WYANDOT AND
HANCOCK COUNTIES...

At 525 PM EDT, strong thunderstorms were clustered near Ada, moving
northeast at 35 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A severe thunderstorm watch remains in effect until 1100 PM EDT for
northwestern Ohio.

LAT...LON 4099 8388 4117 8371 4116 8342 4099 8342
      4099 8329 4069 8331 4069 8343 4070 8344
      4071 8349 4082 8351 4082 8388
TIME...MOT...LOC 2125Z 218DEG 31KT 4082 8389

Mullen

Special weather statement, May 21, 6:30 PM EDT, 2 hours 11 minutes before

Special Weather Statement
National Weather Service Cleveland OH
630 PM EDT MON MAY 21 2018

OHZ027-028-036-212315-
Crawford-Wyandot-Marion-
630 PM EDT MON MAY 21 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN MARION...
WYANDOT AND WESTERN CRAWFORD COUNTIES...

At 629 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Upper Sandusky to near Marseilles to
near Kenton. Movement was east at 25 mph.

Winds in excess of 30 mph and dime size hail are possible with these
storms.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4090 8351 4091 8348 4099 8346 4099 8292
      4062 8296 4062 8342 4068 8342 4070 8344
      4071 8349 4082 8350 4082 8352
TIME...MOT...LOC 2229Z 258DEG 22KT 4084 8336 4077 8341 4069 8353

Special weather statement, May 21, 7:31 PM EDT, 1 hour 10 minutes before

Special Weather Statement
National Weather Service Cleveland OH
731 PM EDT MON MAY 21 2018

OHZ028-029-036-037-047-220030-
Crawford-Marion-Richland-Morrow-Knox-
731 PM EDT MON MAY 21 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT RICHLAND...SOUTHERN
MARION...MORROW...SOUTHEASTERN CRAWFORD AND NORTHWESTERN KNOX
COUNTIES...

At 731 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Bucyrus to 9 miles northwest of
Cardington to 6 miles west of Marion to near Richwood. Movement was
east at 30 mph.

Wind gusts up to 50 mph and pea size hail are possible with these
storms.

Locations impacted include...
Mansfield, Mount Gilead, Galion, Shelby, Ontario, Lexington,
Crestline, Cardington, Bellville, Ashley, Prospect, Waldo,
Chesterville, Sparta, Waterford, Butler, Lucas, Edison, Green Camp
and Marengo.

Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4036 8293 4042 8294 4044 8325 4051 8325
      4051 8340 4054 8335 4053 8296 4064 8296
      4065 8286 4093 8284 4094 8241 4082 8242
      4078 8238 4073 8238 4073 8234 4058 8234
      4055 8250 4045 8264 4034 8265
TIME...MOT...LOC 2331Z 270DEG 26KT 4082 8293 4060 8300 4057 8325 4045
8340

Special weather statement, May 21, 8:41 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 21, 8:54 PM EDT	Areal Flood Advisory	CLE	Ashland, Crawford, Knox, Marion, Morrow, Richland	3 hr
May 21, 9:07 PM EDT	Special Weather Statement	CLE	Ashland, Holmes, Wayne	53 min
May 21, 9:30 PM EDT	Flash Flood Warning	CLE	Ashland, Morrow, Richland	6 hr
May 21, 10:00 PM EDT	Special Weather Statement	CLE	Holmes, Stark, Wayne	60 min
May 21, 10:11 PM EDT	Areal Flood Advisory	CLE	Holmes, Wayne	3 hr
May 21, 11:44 PM EDT	Areal Flood Advisory	CLE	Knox, Morrow	3 hr
May 22, 1:23 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Lorain	52 min
May 22, 2:08 PM EDT	Special Weather Statement	CLE	Seneca	22 min
May 22, 2:12 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Medina, Summit	44 min
May 22, 2:16 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Huron, Seneca, Wyandot	59 min
May 22, 2:34 PM EDT	Special Weather Statement	CLE	Hancock	56 min
May 22, 2:43 PM EDT	Severe Thunderstorm Warning	CLE	Portage	47 min
May 22, 2:46 PM EDT	Severe Thunderstorm Warning	CLE	Trumbull	44 min
May 22, 2:47 PM EDT	Special Weather Statement	CLE	Huron	58 min
May 22, 3:12 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Seneca, Wyandot	63 min
May 22, 3:16 PM EDT	Areal Flood Advisory	CLE	Crawford, Richland, Seneca, Wyandot	3 hr
May 22, 3:17 PM EDT	Severe Thunderstorm Warning	CLE	Hancock	43 min
May 22, 3:23 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Richland	52 min
May 22, 3:27 PM EDT	Severe Thunderstorm Warning	CLE	Trumbull	22 min
May 22, 3:42 PM EDT	Areal Flood Advisory	CLE	Trumbull	3 hr
May 22, 3:58 PM EDT	Special Weather Statement	CLE	Wayne	47 min
May 22, 4:00 PM EDT	Special Weather Statement	CLE	Mahoning	30 min
May 22, 4:15 PM EDT	Special Weather Statement	CLE	Ashland, Richland	45 min
May 22, 4:22 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Holmes, Knox, Morrow, Richland, Wayne	53 min
May 22, 4:36 PM EDT	Special Weather Statement	CLE	Stark, Wayne	39 min
May 22, 4:57 PM EDT	Severe Thunderstorm Warning	CLE	Stark	33 min
May 22, 5:16 PM EDT	Special Weather Statement	CLE	Holmes, Stark	44 min
May 22, 5:27 PM EDT	Severe Thunderstorm Warning	CLE	Holmes, Stark	18 min
May 22, 4:33 PM EDT	Special Weather Statement	CLE	Crawford	27 min

Nearby

Special Weather Statements in Ohio, 2018 Every special weather statement in 2018

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.