Alert archive / Ohio / Tornado Watches in 2000

Tornado Watch 254

May 9, 200024 counties in Indiana; 8 counties in Kentucky; 46 counties in Ohio

The Storm Prediction Center issued this tornado watch at May 9, 2000, 3:45 PM EST for 24 counties in Indiana; 8 counties in Kentucky; 46 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2000, 3:45 PM EST (20:45 UTC)
Expired
May 9, 2000, 10:00 PM EST
In force
6 hr
Issued by
the Storm Prediction Center
All 78 counties

Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Henry County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Pendleton County, KY, Allen County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Highland County, OH, Huron County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Pickaway County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Cincinnati radar (KILN), 83 km from the middle of the area, began a volume at 20:45 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

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

IssuedProductOfficeCountiesLasted
May 9, 3:53 PM ESTSevere Thunderstorm WarningCLEWood52 min
May 9, 3:56 PM ESTSevere Thunderstorm WarningIWXHenry34 min
May 9, 4:07 PM ESTSevere Thunderstorm WarningCLEOttawa, Sandusky68 min
May 9, 5:28 PM ESTSevere Thunderstorm WarningIWXWilliams32 min
May 9, 5:38 PM ESTSevere Thunderstorm WarningIWXAdams32 min
May 9, 5:42 PM ESTSevere Thunderstorm WarningINDDelaware48 min
May 9, 5:51 PM ESTSevere Thunderstorm WarningIWXAllen, Wells49 min
May 9, 5:52 PM ESTSevere Thunderstorm WarningIWXPaulding, Van Wert58 min
May 9, 6:11 PM ESTSevere Thunderstorm WarningIWXDefiance, Williams39 min
May 9, 6:15 PM ESTSevere Thunderstorm WarningIWXAdams45 min
May 9, 6:25 PM ESTSevere Thunderstorm WarningIWXHenry55 min
May 9, 6:38 PM ESTSevere Thunderstorm WarningIWXAllen, Putnam, Van Wert62 min
May 9, 6:38 PM ESTSevere Thunderstorm WarningIWXFulton62 min
May 9, 6:53 PM ESTSevere Thunderstorm WarningCLELucas, Wood67 min
May 9, 6:59 PM ESTTornado WarningCLELucas, Wood61 min
May 9, 7:18 PM ESTTornado WarningCLEOttawa57 min
May 9, 7:37 PM ESTSevere Thunderstorm WarningCLESandusky68 min
May 9, 8:13 PM ESTSevere Thunderstorm WarningCLEErie, Huron47 min
May 9, 8:59 PM ESTSevere Thunderstorm WarningCLEErie46 min
May 9, 9:56 PM ESTSevere Thunderstorm WarningILNKenton34 min

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.8 hours before the alert went out and 84 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 2000-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 507 joules per kilogram.LCLLFCEL10008507005003002001001 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 2000-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.193958Sfc1 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
507 J/kg
Mixed-layer CIN
-270 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

300 
WWUS9 KMKC 092032
SEL4  

SEL4  
MKC WW 092032
INZ000-OHZ000-LEZ000-100300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 254
STORM PREDICTION CENTER NORMAN OK
432 PM EDT TUE MAY 9 2000

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

   SOUTHEAST INDIANA                            
   WESTERN AND CENTRAL OHIO                               
   SOUTHWESTERN LAKE ERIE                          

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100
PM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 45 MILES SOUTHWEST OF CINCINNATI OHIO TO 25 MILES
EAST NORTHEAST OF TOLEDO 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...  CONTINUE...WW 253...

DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INTENSIFY AS COLD FRONT
AND UPPER TROUGH APPROACH AXIS OF VERY UNSTABLE AIR WHERE CAPES
RANGE FROM 3000 TO 4000 J/KG. APPROACHING 80 KT MID LEVEL SPEED MAX
WILL PROVIDE FAVORABLE SHEAR FOR ISOLATED TORNADOES ALONG WITH
SCATTERED LARGE HAIL AND DAMAGING WIND EVENTS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 24035.

...ROGASH

414,0815 383,0833 383,0862 414,0844

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 8, 10:30 PM ESTSevere Thunderstorm WatchSPCBenton, Elkhart, Jasper, Lake, LaPorte, Marshall and 7 more6 hr
May 9, 12:45 AM ESTSevere Thunderstorm WatchSPCAdams, Allen, Cass, DeKalb, Fulton, Huntington and 8 more5 hr
May 9, 2:30 PM ESTSevere Thunderstorm WatchSPCAdams, Allen, Benton, Blackford, Boone, Brown and 59 more7 hr
May 9, 4:45 PM ESTTornado WatchSPCBallard, Caldwell, Calloway, Carlisle, Crittenden, Fulton and 9 more5 hr

Nearby

Tornado Watches in Ohio, 2000Tornado Watches in Indiana, 2000Tornado Watches in Kentucky, 2000Every tornado watch in 2000

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.