Alert archive / Ohio / Severe Thunderstorm Watches in 2012
Severe Thunderstorm Watch 120
The Storm Prediction Center issued this severe thunderstorm watch at Mar 30, 2012, 7:47 PM EDT for 6 counties in Kentucky; 28 counties in Ohio; 13 counties in West Virginia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2012, 7:47 PM EDT (23:47 UTC)
- Expired
- Mar 31, 2012, 12:00 AM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 47 counties
Bracken County, KY, Greenup County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Athens County, OH, Belmont County, OH, Brown County, OH, Carroll County, OH, Clermont County, OH, Columbiana County, OH, Coshocton County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Brooke County, WV, Doddridge County, WV, Hancock County, WV, Jackson County, WV, Marshall County, WV, Mason County, WV, Ohio County, WV, Pleasants County, WV, Ritchie County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Charleston,WV radar (KRLX), 131 km from the middle of the area, began a volume at 23:48 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
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 8:11 PM EDT | Severe Thunderstorm Warning | ILN | Butler, Clermont, Hamilton, Warren | 35 min |
| Mar 30, 8:24 PM EDT | Severe Thunderstorm Warning | ILN | Fayette, Madison, Pickaway, Ross | 39 min |
| Mar 30, 8:29 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum | 46 min |
| Mar 30, 8:32 PM EDT | Severe Thunderstorm Warning | RLX | Morgan, Perry | 58 min |
| Mar 30, 8:45 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Monroe, Muskingum, Noble | 45 min |
| Mar 30, 10:15 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Meigs, Morgan, Perry, Washington | 60 min |
| Mar 30, 10:16 PM EDT | Severe Thunderstorm Warning | ILN | Hocking | 29 min |
| Mar 30, 10:42 PM EDT | Severe Thunderstorm Warning | RLX | Washington | 48 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 12:00Z, 11.8 hours before the alert went out and 141 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
- 825 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 249 m²/s²
- 0-3 km storm-relative helicity
- 364 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 |
|---|---|---|---|---|
| Mar 30, 7:02 PM EDT | Mesoscale Discussion | SPC | Boone, Boyd, Bracken, Campbell, Carroll, Fleming and 11 more | 28 min |
| Mar 30, 2:12 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Butler, Champaign, Clark, Clinton and 26 more | 93 min |
| Mar 30, 3:24 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Auglaize, Butler, Champaign, Clark and 39 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Ohio, 2012Severe Thunderstorm Watches in West Virginia, 2012Severe Thunderstorm Watches in Kentucky, 2012Every severe thunderstorm watch in 2012
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.