Alert archive / Ohio / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 206
The Storm Prediction Center issued this severe thunderstorm watch at May 1, 2007, 4:22 PM EDT for 23 counties in Ohio; 15 counties in Pennsylvania; Brooke County, Hancock County, Ohio County, West Virginia. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 1, 2007, 4:22 PM EDT (20:22 UTC)
- Expired
- May 1, 2007, 11:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 41 counties
Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Cuyahoga County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Muskingum County, OH, Portage County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Erie County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV
The radar
The Pittsburgh radar (KPBZ), 79 km from the middle of the area, began a volume at 20:24 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
37 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 4:54 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning, Trumbull | 36 min |
| May 1, 5:02 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula, Lake | 58 min |
| May 1, 5:06 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 31 min |
| May 1, 5:19 PM EDT | Severe Thunderstorm Warning | CLE | Ashland, Lorain | 56 min |
| May 1, 5:23 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 37 min |
| May 1, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 39 min |
| May 1, 5:41 PM EDT | Severe Thunderstorm Warning | CLE | Medina, Wayne | 64 min |
| May 1, 5:47 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 58 min |
| May 1, 5:50 PM EDT | Tornado Warning | CLE | Crawford | 40 min |
| May 1, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 55 min |
| May 1, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 48 min |
| May 1, 6:10 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 53 min |
| May 1, 6:23 PM EDT | Tornado Warning | PBZ | Mercer | 20 min |
| May 1, 6:24 PM EDT | Tornado Warning | PBZ | Venango | 36 min |
| May 1, 6:26 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula | 64 min |
| May 1, 6:31 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 44 min |
| May 1, 6:33 PM EDT | Severe Thunderstorm Warning | CLE | Stark | 57 min |
| May 1, 6:33 PM EDT | Tornado Warning | PBZ | Clarion | 27 min |
| May 1, 6:44 PM EDT | Severe Thunderstorm Warning | CLE | Wayne | 61 min |
| May 1, 6:50 PM EDT | Flash Flood Warning | CLE | Wayne | 4 hr |
| May 1, 6:50 PM EDT | Severe Thunderstorm Warning | PBZ | Tuscarawas | 55 min |
| May 1, 6:50 PM EDT | Tornado Warning | PBZ | Armstrong, Butler, Clarion | 40 min |
| May 1, 6:51 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga | 54 min |
| May 1, 6:54 PM EDT | Severe Thunderstorm Warning | CLE | Summit | 66 min |
| May 1, 6:56 PM EDT | Severe Thunderstorm Warning | CLE | Lake | 64 min |
| May 1, 7:07 PM EDT | Severe Thunderstorm Warning | CLE | Geauga | 53 min |
| May 1, 7:10 PM EDT | Severe Thunderstorm Warning | CLE | Portage | 65 min |
| May 1, 7:11 PM EDT | Severe Thunderstorm Warning | PBZ | Carroll | 64 min |
| May 1, 7:16 PM EDT | Tornado Warning | PBZ | Jefferson | 44 min |
| May 1, 7:26 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula | 64 min |
| May 1, 7:34 PM EDT | Severe Thunderstorm Warning | CLE | Trumbull | 56 min |
| May 1, 7:47 PM EDT | Flash Flood Warning | CLE | Stark | 6 hr |
| May 1, 7:50 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning | 30 min |
| May 1, 7:56 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 64 min |
| May 1, 8:07 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 53 min |
| May 1, 8:48 PM EDT | Severe Thunderstorm Warning | CLE | Knox | 37 min |
| May 1, 8:54 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Tuscarawas | 66 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
Pittsburgh, PA (KPIT), launched 12:00Z, 8.4 hours before the alert went out and 95 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1863 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 1:09 PM EDT | Mesoscale Discussion | SPC | Defiance, Erie, Fulton, Hancock, Henry, Huron and 9 more | 2 hr |
| May 1, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Auglaize, Crawford, Defiance, Erie and 19 more | 6 hr |
| May 1, 3:53 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 46 more | 97 min |
| May 1, 6:35 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Columbiana and 36 more | 85 min |
Nearby
Severe Thunderstorm Watches in Ohio, 2007Severe Thunderstorm Watches in Pennsylvania, 2007Severe Thunderstorm Watches in West Virginia, 2007Every severe thunderstorm watch in 2007
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.