Alert archive / Ohio / Tornado Watches in 2002

Tornado Watch 747

November 10, 200230 counties in Ohio

The Storm Prediction Center issued this tornado watch at Nov 10, 2002, 4:35 PM EST for 30 counties in Ohio. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Nov 10, 2002, 4:35 PM EST (21:35 UTC)
Expired
Nov 10, 2002, 10:00 PM EST
In force
5 hr
Issued by
the Storm Prediction Center
All 30 counties

Allen County, OH, Ashland County, OH, Auglaize County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Hancock County, OH, Hardin County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Logan County, OH, Lorain County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Ottawa County, OH, Portage County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 117 km from the middle of the area, began a volume at 21:37 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.

Warnings issued inside it

32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Nov 10, 4:38 PM ESTTornado WarningCLELucas, Wood67 min
Nov 10, 4:46 PM ESTSevere Thunderstorm WarningCLEMarion59 min
Nov 10, 4:49 PM ESTSevere Thunderstorm WarningCLEMorrow56 min
Nov 10, 5:02 PM ESTTornado WarningCLESeneca28 min
Nov 10, 5:05 PM ESTTornado WarningCLESandusky55 min
Nov 10, 5:08 PM ESTTornado WarningCLEMarion67 min
Nov 10, 5:12 PM ESTTornado WarningCLERichland63 min
Nov 10, 5:17 PM ESTSevere Thunderstorm WarningILNHardin, Logan58 min
Nov 10, 5:18 PM ESTTornado WarningCLEAshland, Holmes42 min
Nov 10, 5:23 PM ESTTornado WarningCLEOttawa37 min
Nov 10, 5:30 PM ESTTornado WarningCLECrawford, Morrow45 min
Nov 10, 5:35 PM ESTTornado WarningCLEErie, Huron, Seneca55 min
Nov 10, 5:54 PM ESTTornado WarningCLEMedina66 min
Nov 10, 6:00 PM ESTTornado WarningCLEAshland60 min
Nov 10, 6:03 PM ESTTornado WarningCLEHolmes, Wayne57 min
Nov 10, 6:13 PM ESTSevere Thunderstorm WarningCLEKnox47 min
Nov 10, 6:16 PM ESTSevere Thunderstorm WarningCLELorain59 min
Nov 10, 6:19 PM ESTSevere Thunderstorm WarningCLERichland56 min
Nov 10, 6:22 PM ESTTornado WarningCLEStark53 min
Nov 10, 6:26 PM ESTSevere Thunderstorm WarningCLECuyahoga64 min
Nov 10, 6:45 PM ESTTornado WarningCLECuyahoga60 min
Nov 10, 6:56 PM ESTTornado WarningCLEPortage49 min
Nov 10, 7:02 PM ESTSevere Thunderstorm WarningCLESummit58 min
Nov 10, 7:11 PM ESTTornado WarningCLEMahoning, Trumbull64 min
Nov 10, 7:15 PM ESTTornado WarningCLEStark45 min
Nov 10, 7:18 PM ESTSevere Thunderstorm WarningCLEGeauga, Lake57 min
Nov 10, 7:25 PM ESTSevere Thunderstorm WarningCLEHolmes, Wayne65 min
Nov 10, 7:51 PM ESTSevere Thunderstorm WarningCLEPortage39 min
Nov 10, 7:58 PM ESTTornado WarningCLEStark47 min
Nov 10, 8:15 PM ESTSevere Thunderstorm WarningCLEMahoning, Trumbull60 min
Nov 10, 8:46 PM ESTSevere Thunderstorm WarningPBZTuscarawas59 min
Nov 10, 9:01 PM ESTSevere Thunderstorm WarningCLEStark29 min

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.6 hours before the alert went out and 172 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.

Skew-T log-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2002-11-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2002-11-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
335 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS20 KWNS 102134
SEL7  
SPC WW 102135 
OHZ000-LEZ000-110300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 747
STORM PREDICTION CENTER NORMAN OK
435 PM EST SUN NOV 10 2002

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHERN OHIO
SOUTHERN LAKE ERIE

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 435 PM UNTIL 1000
PM EST.

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 ALONG AND 85 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES SOUTHWEST OF MANSFIELD OHIO TO 20 MILES
NORTHWEST OF CLEVELAND OHIO.

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...THIS TORNADO WATCH REPLACES SEVERE
THUNDERSTORM WATCH NUMBER 744.  WATCH NUMBER 744 WILL NOT BE IN
EFFECT AFTER 435 PM EST.  CONTINUE...WW 743...WW 745...WW 746...

DISCUSSION...ISOLATED SUPERCELLS ARE DEVELOPING E OF THE SQUALL
LINE IN NW OH.  GIVEN THE STRONG VERTICAL SHEAR AND MODERATE
INSTABILITY OVER NRN OH...SOME OF THESE STORMS MAY PRODUCE
TORNADOES PRIOR TO AND AS THEY MERGE WITH THE SQUALL LINE. 
OTHERWISE... EXPECT DAMAGING WINDS AND ISOLATED LARGE HAIL WITH THE
SQUALL LINE ITSELF.


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 24045.


...THOMPSON

413,0802 402,0813 402,0844 413,0834

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 10, 1:40 PM ESTSevere Thunderstorm WatchSPCAllen, Auglaize, Crawford, Defiance, Erie, Fulton and 18 more5 hr
Nov 10, 3:35 PM ESTTornado WatchSPCAdams, Brown, Butler, Champaign, Clark, Clermont and 25 more6 hr
Nov 10, 5:50 PM ESTTornado WatchSPCAthens, Gallia, Jackson, Lawrence, Meigs, Pike and 2 more5 hr
Nov 10, 6:45 PM ESTTornado WatchSPCBelmont, Carroll, Columbiana, Harrison, Jefferson, Mahoning and 3 more5 hr

Nearby

Tornado Watches in Ohio, 2002Every tornado watch in 2002

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.