Alert archive / Ohio / Tornado Watches in 2008
Tornado Watch 399
The Storm Prediction Center issued this tornado watch at May 31, 2008, 4:10 AM EDT for 36 counties in Ohio; 10 counties in Pennsylvania; 10 counties in West Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 31, 2008, 4:10 AM EDT (08:10 UTC)
- Expired
- May 31, 2008, 10:29 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 56 counties
Ashland County, OH, Belmont County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Columbiana County, OH, Coshocton County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Guernsey County, OH, Hardin County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mahoning County, OH, Marion County, OH, Miami County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Richland County, OH, Shelby County, OH, Stark County, OH, Tuscarawas County, OH, Union County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Lawrence County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Tyler County, WV, Wetzel County, WV
The radar
The Cleveland radar (KCLE), 127 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 40%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 4:15 AM EDT | Severe Thunderstorm Warning | ILN | Delaware, Franklin, Union | 45 min |
| May 31, 4:31 AM EDT | Severe Thunderstorm Warning | CLE | Holmes, Knox | 29 min |
| May 31, 4:34 AM EDT | Severe Thunderstorm Warning | ILN | Licking | 41 min |
| May 31, 4:38 AM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 52 min |
| May 31, 4:53 AM EDT | Severe Thunderstorm Warning | PBZ | Muskingum | 52 min |
| May 31, 8:07 AM EDT | Severe Thunderstorm Warning | PBZ | Preston | 53 min |
| May 31, 10:03 AM EDT | Severe Thunderstorm Warning | RLX | Morgan | 27 min |
| May 31, 10:10 AM EDT | Severe Thunderstorm Warning | RLX | Washington | 35 min |
| May 31, 10:29 AM EDT | Severe Thunderstorm Warning | RLX | Doddridge, Ritchie, Tyler | 61 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 8.2 hours before the alert went out and 173 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.
- Mixed-layer CAPE
- 279 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 1362 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 10:16 PM EDT | Mesoscale Discussion | SPC | Butler, Darke, Mercer, Miami, Montgomery, Preble and 2 more | 29 min |
| May 31, 12:35 AM EDT | Mesoscale Discussion | SPC | Darke, Preble | 55 min |
| May 31, 12:56 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clinton and 27 more | 34 min |
| May 31, 1:07 AM EDT | Tornado Watch | SPC | Auglaize, Brown, Butler, Champaign, Clark, Clermont and 24 more | 3 hr |
| May 31, 2:56 AM EDT | Mesoscale Discussion | SPC | Ashland, Athens, Auglaize, Belmont, Butler, Carroll and 58 more | 94 min |
| May 31, 7:27 AM EDT | Mesoscale Discussion | SPC | Belmont, Guernsey, Harrison, Jefferson, Monroe, Noble | 2 hr |
| May 31, 10:20 AM EDT | Tornado Watch | SPC | Athens, Gallia, Hocking, Lawrence, Meigs, Monroe and 5 more | 7 hr |
| May 31, 4:28 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Gallia, Jackson, Lawrence, Meigs and 5 more | 62 min |
| May 31, 8:54 AM EDT | Mesoscale Discussion | SPC | Adams, Berks, Chester, Cumberland, Lancaster, Lebanon and 1 more | 96 min |
| May 31, 2:55 PM EDT | Mesoscale Discussion | SPC | McKean, Potter, Tioga | 65 min |
| May 31, 5:34 PM EDT | Mesoscale Discussion | SPC | Bradford, Cameron, Carbon, Centre, Clarion, Clearfield and 24 more | 26 min |
| May 31, 3:07 PM EDT | Tornado Watch | SPC | Grant, Hardy, Pendleton | 6 hr |
Nearby
Tornado Watches in Ohio, 2008Tornado Watches in Pennsylvania, 2008Tornado Watches in West Virginia, 2008Every tornado watch in 2008
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.