Alert archive / Indiana / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 487

June 23, 200035 counties in Illinois; 37 counties in Indiana; 7 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2000, 8:00 PM CDT for 35 counties in Illinois; 37 counties in Indiana; 7 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Jun 23, 2000, 8:00 PM CDT (01:00 UTC)
Expired: Jun 24, 2000, 12:00 AM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 79 counties

Bond County, IL, Calhoun County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Shelby County, IL, Vermilion County, IL, Washington County, IL, Wayne County, IL, Benton County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clay County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Johnson County, IN, Knox County, IN, Madison County, IN, Marion County, IN, Miami County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN, Wabash County, IN, Warren County, IN, White County, IN, City of Saint Louis, MO, Jefferson County, MO, Lincoln County, MO, Perry County, MO, Saint Charles County, MO, Saint Louis County, MO, Sainte Genevieve County, MO

The radar

The Lincoln radar (KILX), 109 km from the middle of the area, began a volume at 01:00 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

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

Issued	Product	Office	Counties	Lasted
Jun 23, 8:00 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	45 min
Jun 23, 8:11 PM CDT	Severe Thunderstorm Warning	LSX	Madison	49 min
Jun 23, 8:17 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey	43 min
Jun 23, 8:26 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	49 min
Jun 23, 8:35 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	40 min
Jun 23, 8:49 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	41 min
Jun 23, 8:59 PM CDT	Severe Thunderstorm Warning	LSX	Madison	46 min
Jun 23, 9:37 PM CDT	Severe Thunderstorm Warning	ILX	Effingham	68 min
Jun 23, 9:38 PM CDT	Severe Thunderstorm Warning	LSX	Marion	52 min
Jun 23, 9:49 PM CDT	Severe Thunderstorm Warning	LSX	Madison	41 min
Jun 23, 10:17 PM CDT	Severe Thunderstorm Warning	ILX	Jasper	58 min
Jun 23, 11:01 PM CDT	Severe Thunderstorm Warning	LSX	Marion	44 min

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.0 hours before the alert went out and 300 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: 6 J/kg
Mixed-layer CIN: -205 J/kg
Mixed-layer LCL: 667 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 195 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.

085 
WWUS9 KMKC 240036
SEL7  

SEL7  
MKC WW 240029
ILZ000-INZ000-MOZ000-240500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 487
STORM PREDICTION CENTER NORMAN OK
729 PM CDT FRI JUN 23 2000

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

   CENTRAL AND SOUTHERN ILLINOIS                           
   INDIANA                            
   EAST CENTRAL AND SOUTHEAST MISSOURI                           

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 800 PM UNTIL
MIDNIGHT 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 60 STATUTE MILES
EITHER SIDE OF A LINE FROM 40 MILES SOUTH SOUTHWEST OF SAINT LOUIS
MISSOURI TO 20 MILES NORTH NORTHWEST OF MUNCIE INDIANA.

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 482...SEVERE THUNDERSTORM WATCH
NUMBER 483.  WATCH NUMBER 482...483 WILL NOT BE IN EFFECT AFTER 800
PM CDT.  CONTINUE...WW 484...WW 485...WW 486...

DISCUSSION...LARGE ARC-SHAPED BAND OF THUNDERSTORMS WILL CONTINUE
MOVING RAPIDLY ESEWD ACROSS EAST CENTRAL IL INTO WRN INDIANA...WITH
SWRN PART OF THE BAND MOVING SEWD ACROSS SRN IL AND ERN MO.  AIR
MASS AHEAD OF THE STORMS IS VERY MOIST WITH DEW POINTS IN THE
70S...CONTRIBUTING TO VERY UNSTABLE AIR MASS WITH CAPE OF 3000-5000
J/KG.  VAD WINDS FROM ILX SHOW 50 KT REAR-INFLOW JET INTO THE
FASTEST MOVING PART OF THE LINE...WITH CONTINUED POTENTIAL FOR
DAMAGING GUSTS AND 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 29030.


...WEISS

390,0910 411,0860 394,0850 372,0901

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 24, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Crawford, Edgar, Edwards, Gallatin, Hamilton and 13 more	6 hr
Jun 24, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 35 more	4 hr
Jun 23, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	Holt	6 hr

Nearby

Severe Thunderstorm Watches in Indiana, 2000 Severe Thunderstorm Watches in Illinois, 2000 Severe Thunderstorm Watches in Missouri, 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; radar from the NEXRAD Level II archive.