Alert archive / Illinois / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 482

June 23, 200039 counties in Illinois; Benton County, Jasper County, Newton County, Indiana

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2000, 3:00 PM CDT for 39 counties in Illinois; Benton County, Jasper County, Newton County, Indiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 23, 2000, 3:00 PM CDT (20:00 UTC)
Expired
Jun 23, 2000, 8:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 42 counties

Bureau County, IL, Carroll County, IL, Champaign County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Woodford County, IL, Benton County, IN, Jasper County, IN, Newton County, IN

The radar

The Lincoln radar (KILX), 73 km from the middle of the area, began a volume at 20:04 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

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

IssuedProductOfficeCountiesLasted
Jun 23, 3:39 PM CDTSevere Thunderstorm WarningILXKnox66 min
Jun 23, 3:49 PM CDTSevere Thunderstorm WarningDVNHenry56 min
Jun 23, 4:22 PM CDTSevere Thunderstorm WarningILXPeoria, Tazewell, Woodford53 min
Jun 23, 4:31 PM CDTSevere Thunderstorm WarningILXFulton, Knox, Schuyler59 min
Jun 23, 5:04 PM CDTSevere Thunderstorm WarningILXMarshall, Peoria, Woodford56 min
Jun 23, 5:04 PM CDTSevere Thunderstorm WarningILXStark56 min
Jun 23, 5:13 PM CDTSevere Thunderstorm WarningILXMason, Tazewell62 min
Jun 23, 5:34 PM CDTSevere Thunderstorm WarningLOTLaSalle56 min
Jun 23, 5:38 PM CDTSevere Thunderstorm WarningILXDeWitt, Logan, McLean67 min
Jun 23, 5:38 PM CDTSevere Thunderstorm WarningILXMason, Menard67 min
Jun 23, 6:24 PM CDTSevere Thunderstorm WarningILXChristian, Macon66 min
Jun 23, 6:40 PM CDTSevere Thunderstorm WarningILXDeWitt, McLean50 min
Jun 23, 6:48 PM CDTSevere Thunderstorm WarningILXChampaign, Piatt57 min
Jun 23, 7:30 PM CDTSevere Thunderstorm WarningILXDouglas, Edgar, Vermilion60 min
Jun 23, 7:45 PM CDTSevere Thunderstorm WarningILXChampaign45 min

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.0 hours before the alert went out and 105 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, Lincoln, IL at 12:00Z on 2000-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Lincoln, IL at 12:00Z on 2000-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1677 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
89 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.

566 
WWUS9 KMKC 231953
SEL2  
MKC WW 231940
ILZ000-INZ000-240100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 482
STORM PREDICTION CENTER NORMAN OK
240 PM CDT FRI JUN 23 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   CENTRSAL AND NORTHERN ILLINOIS                           
   NORTHWEST INDIANA                            

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 300 PM UNTIL 800
PM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 70 STATUTE MILES
EITHER SIDE OF A LINE FROM 10 MILES WEST NORTHWEST OF MOLINE
ILLINOIS TO 5 MILES EAST OF DANVILLE ILLINOIS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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 480...WW 481...
WW 481 WILL BE REPLACED SHORTLY WITH A NEW WW COVERING THE
REMAINDER OF W CTRL IL AND ERN MO.

DISCUSSION...THUNDERSTORM COMPLEX WITH EMBEDDED BOWS/SUPERCELLS
EXPECTED TO EVOLVE FROM STORMS NOW OVER SRN/ERN IA.  THIS ACTIVITY
SHOULD MOVE/DEVELOP GENERALLY E/SE TOWARD CNTRL IL.  OTHER STORMS
MAY FORM ALONG STALLED FRONT IN NRN/CNTRL IL AS LOW LEVEL JET AHEAD
OF IA COMPLEX ENHANCES WARM ADVECTION OVER REGION.   

AVIATION...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 550.  MEAN STORM
MOTION VECTOR 29025.

...CORFIDI

391,0880 403,0911 422,0900 410,0865

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 23, 12:30 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Pike, Scott5 hr
Jun 23, 3:45 PM CDTSevere Thunderstorm WatchSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more4 hr

Nearby

Severe Thunderstorm Watches in Illinois, 2000Severe Thunderstorm Watches in Indiana, 2000Every severe thunderstorm 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.