Alert archive / Ohio / Tornado Watches in 2007
Tornado Watch 193
The Storm Prediction Center issued this tornado watch at Apr 26, 2007, 3:58 PM EDT for 24 counties in Ohio; 14 counties in Pennsylvania; 7 counties in West Virginia. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2007, 3:58 PM EDT (19:58 UTC)
- Expired
- Apr 26, 2007, 10:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 45 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, Lake County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Monroe County, OH, Muskingum County, OH, Noble 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, Fayette County, PA, Greene County, PA, Lawrence County, PA, Mercer County, PA, Venango 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, Wetzel County, WV
The radar
The Cleveland radar (KCLE), 80 km from the middle of the area, began a volume at 19:57 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
- 20%
- One or more gusts of 65 knots or more
- 10%
- 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
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 4:16 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 29 min |
| Apr 26, 4:24 PM EDT | Severe Thunderstorm Warning | PBZ | Columbiana | 36 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, 8.0 hours before the alert went out and 124 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
- 685 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 261951
SEL3
SPC WW 261951
OHZ000-PAZ000-WVZ000-LEZ000-270200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 193
NWS STORM PREDICTION CENTER NORMAN OK
350 PM EDT THU APR 26 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
EASTERN OHIO
WESTERN PENNSYLVANIA
NORTHERN WEST VIRGINIA
LAKE ERIE
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 350 PM UNTIL
1000 PM EDT.
TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EITHER SIDE OF A LINE FROM 35 MILES WEST NORTHWEST OF
ZANESVILLE OHIO TO 15 MILES SOUTH SOUTHEAST OF FRANKLIN
PENNSYLVANIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.
OTHER WATCH INFORMATION...CONTINUE...WW 191...WW 192...
DISCUSSION...ISOLATED SUPERCELLS HAVE EVOLVED ALONG RETREATING WARM
FRONT OVER EASTERN OH. THIS ACTIVITY WILL SPREAD/DEVELOP INTO
WESTERN PA WITH A THREAT FOR ISOLATED TORNADOES AND LARGE HAIL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 22030.
...DARROWSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 1:51 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Auglaize, Brown, Butler, Champaign and 33 more | 54 min |
| Apr 26, 2:26 PM EDT | Tornado Watch | SPC | Adams, Allen, Ashland, Auglaize, Brown, Butler and 52 more | 8 hr |
| Apr 26, 3:26 PM EDT | Mesoscale Discussion | SPC | Belmont, Carroll, Columbiana, Cuyahoga, Geauga, Guernsey and 11 more | 64 min |
| Apr 26, 6:42 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Ashland, Auglaize, Brown, Butler and 63 more | 93 min |
Nearby
Tornado Watches in Ohio, 2007Tornado Watches in Pennsylvania, 2007Tornado Watches in West Virginia, 2007Every tornado 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.