Alert archive / Ohio / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 474
The Storm Prediction Center issued this severe thunderstorm watch at Sep 10, 2016, 3:30 PM EDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 10, 2016, 3:30 PM EDT (19:30 UTC)
- Expired
- Sep 10, 2016, 9:59 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 67 counties
Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Niagara County, NY, Orleans County, NY, Wyoming County, NY, Ashland County, OH, Ashtabula County, OH, Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lake County, OH, Lorain County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Portage County, OH, Richland County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV
The radar
The Cleveland radar (KCLE), 68 km from the middle of the area, began a volume at 19:29 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
- 5%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 20%
- 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
- 70%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 3:42 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Huron, Seneca | 48 min |
| Sep 10, 4:12 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Lorain, Medina | 48 min |
| Sep 10, 4:44 PM EDT | Severe Thunderstorm Warning | CLE | Ashland, Knox, Medina, Morrow, Richland, Wayne | 61 min |
| Sep 10, 4:55 PM EDT | Severe Thunderstorm Warning | CLE | Cuyahoga, Geauga, Lake | 65 min |
| Sep 10, 5:55 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula, Geauga, Lake, Portage, Summit, Trumbull | 65 min |
| Sep 10, 6:16 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 14 min |
| Sep 10, 6:38 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Niagara | 52 min |
| Sep 10, 6:38 PM EDT | Severe Thunderstorm Warning | CLE | Ashtabula | 67 min |
| Sep 10, 6:41 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Niagara | 64 min |
| Sep 10, 6:56 PM EDT | Severe Thunderstorm Warning | BUF | Chautauqua | 64 min |
| Sep 10, 7:07 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum, Tuscarawas | 27 min |
| Sep 10, 7:24 PM EDT | Severe Thunderstorm Warning | BUF | Niagara, Orleans | 51 min |
| Sep 10, 7:24 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 51 min |
| Sep 10, 7:26 PM EDT | Severe Thunderstorm Warning | BUF | Erie, Genesee, Livingston, Monroe, Niagara, Orleans and 1 more | 49 min |
| Sep 10, 7:31 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 44 min |
| Sep 10, 7:32 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie | 43 min |
| Sep 10, 7:51 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Mercer, Venango | 39 min |
| Sep 10, 7:58 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Harrison, Jefferson | 29 min |
| Sep 10, 7:59 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus, Chautauqua, Erie | 61 min |
| Sep 10, 8:04 PM EDT | Severe Thunderstorm Warning | BUF | Genesee, Monroe, Orleans | 41 min |
| Sep 10, 8:13 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 24 min |
| Sep 10, 8:22 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 53 min |
| Sep 10, 8:22 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 38 min |
| Sep 10, 9:04 PM EDT | Severe Thunderstorm Warning | BUF | Allegany, Cattaraugus | 56 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 (KAGC), launched 12:00Z, 7.5 hours before the alert went out and 152 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
- 258 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 854 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 1:16 PM EDT | Mesoscale Discussion | SPC | Chautauqua | 2 hr |
| Sep 10, 2:35 PM EDT | Mesoscale Discussion | SPC | Franklin, Herkimer, Jefferson, Lewis, Oneida, Oswego and 2 more | 2 hr |
| Sep 10, 4:38 PM EDT | Mesoscale Discussion | SPC | Cattaraugus, Chautauqua, Erie, Genesee, Niagara, Wyoming | 2 hr |
| Sep 9, 11:24 PM EDT | Mesoscale Discussion | SPC | Allen, Auglaize, Darke, Hancock, Hardin, Henry and 8 more | 96 min |
| Sep 10, 2:24 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Butler, Champaign, Clark, Clermont and 22 more | 5 hr |
| Sep 10, 4:39 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Clermont, Clinton, Fayette, Franklin and 6 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Ohio, 2016Severe Thunderstorm Watches in Pennsylvania, 2016Severe Thunderstorm Watches in New York, 2016Every severe thunderstorm watch in 2016
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.