Alert archive / Ohio / Tornado Watches in 2023

Tornado Watch 634

August 12, 20234 states

The Storm Prediction Center issued this tornado watch at Aug 12, 2023, 12:50 PM EDT for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Aug 12, 2023, 12:50 PM EDT (16:50 UTC)
Expired: Aug 12, 2023, 9:00 PM EDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 118 counties

Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Yates County, NY, Ashland County, OH, Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Delaware County, OH, Erie County, OH, Geauga County, OH, Guernsey County, OH, Hancock County, OH, Hardin County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Monroe County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Ottawa County, OH, Portage County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Union County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Fayette County, PA, Forest County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lawrence County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Pike County, PA, Potter County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Wayne County, PA, Westmoreland County, PA, Wyoming County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV

The radar

The State College radar (KCCX), 69 km from the middle of the area, began a volume at 16:50 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

112 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Aug 12, 12:50 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Geauga, Lake	40 min
Aug 12, 12:57 PM EDT	Tornado Warning Tornado observed	ILN	Hardin	18 min
Aug 12, 12:58 PM EDT	Tornado Warning Tornado observed	CLE	Marion	32 min
Aug 12, 1:02 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Erie, Huron, Sandusky, Seneca, Wyandot	43 min
Aug 12, 1:23 PM EDT	Tornado Warning Tornado observed	CLE	Marion	37 min
Aug 12, 1:26 PM EDT	Severe Thunderstorm Warning	CLE	Lucas	26 min
Aug 12, 1:29 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Erie, Huron, Lorain	46 min
Aug 12, 1:29 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Marion, Morrow, Wyandot	46 min
Aug 12, 1:38 PM EDT	Severe Thunderstorm Warning Destructive damage threat	CLE	Erie	12 min
Aug 12, 1:39 PM EDT	Flash Flood Warning	CLE	Erie	5 hr
Aug 12, 1:40 PM EDT	Tornado Warning	CLE	Crawford, Marion	18 min
Aug 12, 1:41 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	46 min
Aug 12, 1:42 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Huron, Lorain, Richland	48 min
Aug 12, 1:55 PM EDT	Severe Thunderstorm Warning	CTP	Warren	65 min
Aug 12, 2:01 PM EDT	Severe Thunderstorm Warning	BGM	Cayuga, Seneca	17 min
Aug 12, 2:07 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	53 min
Aug 12, 2:07 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Morrow, Richland	53 min
Aug 12, 2:10 PM EDT	Severe Thunderstorm Warning	CLE	Cuyahoga, Erie, Huron, Lorain, Medina	30 min
Aug 12, 2:13 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Crawford	68 min
Aug 12, 2:18 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Lorain, Medina, Wayne	42 min
Aug 12, 2:18 PM EDT	Tornado Warning	CLE	Ashland, Morrow, Richland	42 min
Aug 12, 2:21 PM EDT	Severe Thunderstorm Warning	CLE	Crawford, Hancock, Seneca, Wyandot	39 min
Aug 12, 2:24 PM EDT	Severe Thunderstorm Warning	CTP	Elk, McKean	66 min
Aug 12, 2:27 PM EDT	Severe Thunderstorm Warning	BGM	Schuyler, Steuben, Yates	48 min
Aug 12, 2:40 PM EDT	Tornado Warning	CLE	Ashland, Knox, Richland	35 min
Aug 12, 2:50 PM EDT	Severe Thunderstorm Warning	BGM	Schuyler, Tompkins, Yates	55 min
Aug 12, 3:00 PM EDT	Tornado Warning Tornado observed	CLE	Holmes	45 min
Aug 12, 3:19 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming	56 min
Aug 12, 3:25 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chemung, Cortland, Tioga, Tompkins	50 min
Aug 12, 3:29 PM EDT	Severe Thunderstorm Warning	BGM	Steuben	32 min
Aug 12, 3:32 PM EDT	Severe Thunderstorm Warning	CLE	Medina, Summit	28 min
Aug 12, 3:33 PM EDT	Tornado Warning	CLE	Holmes	42 min
Aug 12, 3:36 PM EDT	Severe Thunderstorm Warning	PBZ	Forest, Venango	39 min
Aug 12, 3:37 PM EDT	Tornado Warning	PBZ	Coshocton, Tuscarawas	23 min
Aug 12, 3:42 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Huron, Richland	48 min
Aug 12, 3:49 PM EDT	Severe Thunderstorm Warning	CLE	Portage, Summit	41 min
Aug 12, 3:58 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Harrison, Tuscarawas	62 min
Aug 12, 3:58 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	47 min
Aug 12, 4:01 PM EDT	Tornado Warning	CLE	Portage	29 min
Aug 12, 4:08 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	52 min
Aug 12, 4:11 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Chenango, Tioga	49 min
Aug 12, 4:18 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk	42 min
Aug 12, 4:20 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Wayne	22 min
Aug 12, 4:23 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	9 min
Aug 12, 4:27 PM EDT	Tornado Warning	CLE	Mahoning, Portage	53 min
Aug 12, 4:44 PM EDT	Severe Thunderstorm Warning	BGM	Luzerne	31 min
Aug 12, 4:49 PM EDT	Severe Thunderstorm Warning	CLE	Trumbull	26 min
Aug 12, 4:51 PM EDT	Tornado Warning	PBZ	Carroll, Harrison, Tuscarawas	24 min
Aug 12, 4:52 PM EDT	Severe Thunderstorm Warning	BGM	Chemung, Steuben	38 min
Aug 12, 4:53 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton	26 min
Aug 12, 5:01 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Harrison, Jefferson, Tuscarawas	44 min
Aug 12, 5:03 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	57 min
Aug 12, 5:03 PM EDT	Severe Thunderstorm Warning	PBZ	Lawrence	41 min
Aug 12, 5:07 PM EDT	Severe Thunderstorm Warning	PBZ	Mercer	38 min
Aug 12, 5:14 PM EDT	Tornado Warning	PBZ	Carroll, Harrison, Jefferson	31 min
Aug 12, 5:20 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Holmes, Richland, Wayne	55 min
Aug 12, 5:23 PM EDT	Severe Thunderstorm Warning	BGM	Chemung, Steuben, Tioga	52 min
Aug 12, 5:25 PM EDT	Severe Thunderstorm Warning	BGM	Delaware	34 min
Aug 12, 5:25 PM EDT	Severe Thunderstorm Warning	BUF	Lewis	35 min
Aug 12, 5:33 PM EDT	Severe Thunderstorm Warning	BGM	Broome, Delaware	57 min
Aug 12, 5:40 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Harrison, Jefferson	50 min
Aug 12, 5:48 PM EDT	Flash Flood Warning	PBZ	Lawrence	2 hr
Aug 12, 5:51 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Jefferson	39 min
Aug 12, 5:54 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	51 min
Aug 12, 5:55 PM EDT	Flash Flood Warning	PBZ	Tuscarawas	3 hr
Aug 12, 6:00 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	30 min
Aug 12, 6:02 PM EDT	Flash Flood Warning	PBZ	Carroll, Columbiana, Jefferson, Tuscarawas	2 hr
Aug 12, 6:05 PM EDT	Tornado Warning	BGM	Delaware, Sullivan	25 min
Aug 12, 6:11 PM EDT	Flash Flood Warning	CLE	Holmes	3 hr
Aug 12, 6:12 PM EDT	Severe Thunderstorm Warning	BGM	Tioga	48 min
Aug 12, 6:13 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	47 min
Aug 12, 6:21 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Armstrong, Butler, Westmoreland	39 min
Aug 12, 6:24 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	51 min
Aug 12, 6:27 PM EDT	Severe Thunderstorm Warning	BGM	Delaware, Sullivan	48 min
Aug 12, 6:34 PM EDT	Flash Flood Warning	CLE	Stark	3 hr
Aug 12, 6:37 PM EDT	Flash Flood Warning	PBZ	Carroll, Harrison, Jefferson, Tuscarawas	2 hr
Aug 12, 6:37 PM EDT	Severe Thunderstorm Warning	PBZ	Columbiana, Jefferson	38 min
Aug 12, 6:39 PM EDT	Flash Flood Warning	BGM	Delaware	111 min
Aug 12, 6:41 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Tuscarawas	49 min
Aug 12, 6:45 PM EDT	Severe Thunderstorm Warning	BGM	Bradford, Susquehanna	45 min
Aug 12, 6:48 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Indiana, Westmoreland	42 min
Aug 12, 6:50 PM EDT	Flash Flood Warning	BGM	Sullivan	3 hr
Aug 12, 6:54 PM EDT	Severe Thunderstorm Warning	PBZ	Harrison, Jefferson	51 min
Aug 12, 6:57 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	63 min
Aug 12, 6:57 PM EDT	Flash Flood Warning	PBZ	Allegheny, Armstrong, Butler, Indiana, Westmoreland	2 hr
Aug 12, 6:58 PM EDT	Severe Thunderstorm Warning	BGM	Madison, Oneida	32 min
Aug 12, 7:00 PM EDT	Severe Thunderstorm Warning	PBZ	Carroll, Columbiana, Coshocton, Harrison, Jefferson, Tuscarawas	45 min
Aug 12, 7:01 PM EDT	Severe Thunderstorm Warning	BUF	Cayuga, Oswego	44 min
Aug 12, 7:06 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	39 min
Aug 12, 7:23 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis	67 min
Aug 12, 7:28 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	32 min
Aug 12, 7:28 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont, Guernsey, Harrison, Jefferson, Tuscarawas	47 min
Aug 12, 7:29 PM EDT	Tornado Warning	BUF	Oswego	35 min
Aug 12, 7:30 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Westmoreland	19 min
Aug 12, 7:36 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont	39 min
Aug 12, 7:44 PM EDT	Severe Thunderstorm Warning	BUF	Jefferson, Lewis, Oswego	61 min
Aug 12, 7:47 PM EDT	Severe Thunderstorm Warning	BGM	Sullivan	28 min
Aug 12, 8:03 PM EDT	Tornado Warning	PBZ	Washington	27 min
Aug 12, 8:13 PM EDT	Tornado Warning	PBZ	Belmont	18 min
Aug 12, 8:16 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	44 min
Aug 12, 8:17 PM EDT	Tornado Warning	PBZ	Monroe, Noble	28 min
Aug 12, 8:22 PM EDT	Tornado Warning	PBZ	Belmont	16 min
Aug 12, 8:24 PM EDT	Tornado Warning Tornado observed	PBZ	Greene, Washington	36 min
Aug 12, 8:29 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	25 min
Aug 12, 8:34 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	41 min
Aug 12, 8:36 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Cambria	39 min
Aug 12, 8:42 PM EDT	Severe Thunderstorm Warning	PBZ	Monroe	33 min
Aug 12, 8:45 PM EDT	Tornado Warning	BGM	Oneida	30 min
Aug 12, 8:52 PM EDT	Tornado Warning	CTP	Cambria	38 min
Aug 12, 8:52 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	38 min
Aug 12, 8:56 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene	49 min
Aug 12, 8:58 PM EDT	Severe Thunderstorm Warning	BGM	Oneida	47 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 4.8 hours before the alert went out and 164 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: 270 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 11:37 AM EDT	Mesoscale Discussion	SPC	Chautauqua	2 hr
Aug 12, 4:04 PM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 15 more	116 min
Aug 12, 5:38 PM EDT	Mesoscale Discussion	SPC	Bronx, Columbia, Dutchess, Kings, New York, Orange and 5 more	2 hr
Aug 12, 6:07 PM EDT	Severe Thunderstorm Watch	SPC	Bronx, Columbia, Dutchess, Greene, Kings, Nassau and 8 more	6 hr
Aug 12, 8:53 AM EDT	Mesoscale Discussion	SPC	Butler, Hamilton, Preble	97 min
Aug 12, 7:31 PM EDT	Mesoscale Discussion	SPC	Belmont, Monroe, Noble, Washington	89 min

Nearby

Tornado Watches in Ohio, 2023 Tornado Watches in Pennsylvania, 2023 Tornado Watches in New York, 2023 Every tornado watch in 2023

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.