Alert archive / Ohio / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 601
The Storm Prediction Center issued this severe thunderstorm watch at Aug 16, 2007, 1:02 AM EDT for 27 counties in Ohio. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 16, 2007, 1:02 AM EDT (05:02 UTC)
- Expired
- Aug 16, 2007, 5:00 AM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 27 counties
Auglaize County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Hocking County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Pickaway County, OH, Richland County, OH, Shelby County, OH, Union County, OH, Wyandot County, OH
The radar
The Cincinnati radar (KILN), 113 km from the middle of the area, began a volume at 05:02 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 5%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 1:08 AM EDT | Severe Thunderstorm Warning | ILN | Mercer | 52 min |
| Aug 16, 1:42 AM EDT | Severe Thunderstorm Warning | ILN | Auglaize | 48 min |
| Aug 16, 2:01 AM EDT | Severe Thunderstorm Warning | ILN | Darke | 44 min |
| Aug 16, 2:08 AM EDT | Severe Thunderstorm Warning | ILN | Shelby | 52 min |
| Aug 16, 2:26 AM EDT | Severe Thunderstorm Warning | ILN | Miami | 49 min |
| Aug 16, 2:47 AM EDT | Severe Thunderstorm Warning | ILN | Clark, Greene, Montgomery | 43 min |
| Aug 16, 3:23 AM EDT | Severe Thunderstorm Warning | ILN | Delaware, Franklin, Madison, Union | 52 min |
| Aug 16, 3:43 AM EDT | Severe Thunderstorm Warning | ILN | Shelby | 31 min |
| Aug 16, 3:46 AM EDT | Severe Thunderstorm Warning | ILN | Miami | 29 min |
| Aug 16, 4:02 AM EDT | Severe Thunderstorm Warning | ILN | Fairfield | 34 min |
| Aug 16, 4:07 AM EDT | Severe Thunderstorm Warning | ILN | Champaign | 38 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, 5.0 hours before the alert went out and 112 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
- 216 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 2096 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 318 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 |
|---|---|---|---|---|
| Aug 15, 10:11 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Defiance, Hardin, Henry, Logan and 5 more | 64 min |
| Aug 15, 10:35 PM EDT | Tornado Watch | SPC | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 4 hr |
| Aug 16, 12:01 AM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Crawford, Defiance, Hancock, Hardin and 14 more | 89 min |
| Aug 16, 3:21 AM EDT | Mesoscale Discussion | SPC | Athens, Champaign, Clark, Clinton, Crawford, Darke and 32 more | 24 min |
| Aug 16, 4:50 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Clermont, Gallia, Hamilton, Highland and 5 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Ohio, 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.