Alert archive / Illinois / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 705

August 23, 20005 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 23, 2000, 11:15 PM CDT for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Aug 23, 2000, 11:15 PM CDT (04:15 UTC)
Expired: Aug 24, 2000, 5:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 62 counties

Bond County, IL, Clay County, IL, Clinton County, IL, Edwards County, IL, Fayette County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Lawrence County, IL, Marion County, IL, Massac County, IL, Montgomery County, IL, Perry County, IL, Pope County, IL, Randolph County, IL, Richland County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Dubois County, IN, Gibson County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Allen County, KY, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, Lyon County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Ohio County, KY, Simpson County, KY, Todd County, KY, Union County, KY, Warren County, KY, Webster County, KY, Perry County, MO, Sumner County, TN, Trousdale County, TN

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Aug 23, 11:16 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Montgomery	59 min
Aug 24, 12:02 AM CDT	Severe Thunderstorm Warning	LMK	Breckinridge, Meade	28 min
Aug 24, 12:09 AM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	66 min
Aug 24, 12:17 AM CDT	Severe Thunderstorm Warning	ILX	Clay	43 min
Aug 24, 12:27 AM CDT	Flash Flood Warning	LSX	Bond, Fayette, Macoupin, Marion, Montgomery	6 hr
Aug 24, 12:40 AM CDT	Severe Thunderstorm Warning	PAH	Wayne	50 min
Aug 24, 1:25 AM CDT	Flash Flood Warning	LMK	Crawford, Dubois	2 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 4.3 hours before the alert went out and 218 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1082 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1541 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

997 
WWUS9 KMKC 240403
SEL5  

SEL5  
MKC WW 240349
ILZ000-INZ000-KYZ000-241000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 705
STORM PREDICTION CENTER NORMAN OK
1049 PM CDT WED AUG 23 2000

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

   southern ILLINOIS                           
   southern INDIANA                            
   western and central KENTUCKY                           

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1115 PM
UNTIL 500 AM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 65 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM SCOTT AFB BELLEVILLE ILLINOIS TO 25
MILES NORTHEAST OF BOWLING GREEN KENTUCKY.

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 704...

DISCUSSION...convective system nw of st. LOUIS IS EXPECTED TO TRACK
SEWD ALONG PRE-EXISTING BOUNDARY THROUGH SRN IL INTO PTNS OF KY/SRN
INDIANA. UNTIL THEN...BAND OF E-W CONVECTION OVER SRN INDIANA MAY
PRODUCE LARGE HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 28035.

...VESCIO

392,0895 381,0860 361,0860 373,0895

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 3 more	5 hr

Nearby

Severe Thunderstorm Watches in Illinois, 2000 Severe Thunderstorm Watches in Kentucky, 2000 Severe Thunderstorm Watches in Indiana, 2000 Every 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.