Alert archive / Illinois / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 483

June 23, 200031 counties in Illinois; Lee County, Van Buren County, Iowa; 18 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jun 23, 2000, 3:45 PM CDT for 31 counties in Illinois; Lee County, Van Buren County, Iowa; 18 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 23, 2000, 3:45 PM CDT (20:45 UTC)
Expired
Jun 23, 2000, 8:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 51 counties

Lee County, IA, Van Buren County, IA, Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Cumberland County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Greene County, IL, Hancock County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Menard County, IL, Montgomery County, IL, Morgan County, IL, Perry County, IL, Pike County, IL, Saint Clair County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Washington County, IL, Audrain County, MO, City of Saint Louis, MO, Clark County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Macon County, MO, Marion County, MO, Monroe County, MO, Montgomery County, MO, Pike County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Louis County, MO, Scotland County, MO, Shelby County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 80 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
Jun 23, 3:49 PM CDTSevere Thunderstorm WarningLSXMacoupin41 min
Jun 23, 4:05 PM CDTSevere Thunderstorm WarningLSXKnox, Lewis40 min
Jun 23, 4:24 PM CDTSevere Thunderstorm WarningLSXAdams51 min
Jun 23, 4:31 PM CDTSevere Thunderstorm WarningILXFulton, Knox, Schuyler59 min
Jun 23, 5:21 PM CDTSevere Thunderstorm WarningLSXAdams, Pike39 min
Jun 23, 5:29 PM CDTSevere Thunderstorm WarningILXCass46 min
Jun 23, 5:30 PM CDTSevere Thunderstorm WarningLSXBrown45 min
Jun 23, 5:38 PM CDTSevere Thunderstorm WarningILXMason, Menard67 min
Jun 23, 5:44 PM CDTSevere Thunderstorm WarningILXMorgan, Scott61 min
Jun 23, 6:00 PM CDTSevere Thunderstorm WarningILXSangamon60 min
Jun 23, 6:01 PM CDTSevere Thunderstorm WarningLSXPike59 min
Jun 23, 6:24 PM CDTSevere Thunderstorm WarningILXChristian, Macon66 min
Jun 23, 6:43 PM CDTSevere Thunderstorm WarningILXMorgan, Scott47 min
Jun 23, 6:58 PM CDTSevere Thunderstorm WarningLSXGreene, Macoupin, Montgomery47 min
Jun 23, 6:59 PM CDTSevere Thunderstorm WarningLSXPike46 min
Jun 23, 7:12 PM CDTSevere Thunderstorm WarningLSXCalhoun48 min
Jun 23, 7:30 PM CDTSevere Thunderstorm WarningLSXJersey45 min
Jun 23, 7:31 PM CDTSevere Thunderstorm WarningLSXPike44 min
Jun 23, 7:43 PM CDTSevere Thunderstorm WarningLSXMacoupin47 min
Jun 23, 8:00 PM CDTSevere Thunderstorm WarningLSXCalhoun45 min

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.8 hours before the alert went out and 220 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 3:00 PM CDTSevere Thunderstorm WatchSPCBureau, Carroll, Champaign, Coles, DeWitt, Douglas and 33 more5 hr
Jun 23, 11:30 AM CDTSevere Thunderstorm WatchSPCAppanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 34 more6 hr
Jun 23, 5:15 PM CDTSevere Thunderstorm WatchSPCAdams, Appanoose, Cass, Clarke, Davis, Decatur and 9 more6 hr

Nearby

Severe Thunderstorm Watches in Illinois, 2000Severe Thunderstorm Watches in Missouri, 2000Severe Thunderstorm Watches in Iowa, 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.