Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 413, NWS St. Louis, MO

August 22, 2000Calhoun County, Greene County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 22, 2000, 9:05 PM CDT for Calhoun County, Greene County, Illinois. It was in force for 55 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Aug 22, 2000, 9:05 PM CDT (02:05 UTC)
Expired: Aug 22, 2000, 10:00 PM CDT
In force: 55 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Calhoun County, IL, Greene County, IL

The radar

The St Louis radar (KLSX), 75 km from the middle of the area, began a volume at 01:57 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.

What was reported inside it

Time	Report	Where	Remark
Aug 22, 9:30 PM CDT	Thunderstorm Wind 51 E	White Hall, IL	Local law enforcement reported trees and power lines down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 22, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.1 hours before the alert went out and 188 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: 3363 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 230209
SVRSTL
ILC013-061-230300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
905 PM CDT TUE AUG 22 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CALHOUN COUNTY IN WEST CENTRAL ILLINOIS
  GREENE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 1000 PM CDT

* AT 905 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM JUST NORTH OF PITTSFIELD MOVING SOUTHEAST AT 
  30 MPH.  DAMAGING THUNDERSTORM WINDS CAN BE EXPECTED WITH AND
  SOUTHEAST OF THIS STORM. 

* LOCATIONS IN THE PATH...
  ROODHOUSE
  WHITE HALL
  ATHENSVILLE
  GREENFIELD
  WRIGHTS
  WALKERSVILLE
  BELLEVIEW
  KAMPSVILLE
  
THIS STORM HAS A HISTORY OF DAMAGING WINDS. TAKE SHELTER IN A STURDY
BUILDING IMMEDIATELY.

LAT...LON 3953 9058 3940 9063 3940 9089 3924 9071
          3914 9063 3920 9054 3926 9015 3954 9017

GKS

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 22, 7:28 PM CDT	Severe Thunderstorm Warning	LSX	Adams	62 min
Aug 22, 8:22 PM CDT	Severe Thunderstorm Warning	LSX	Brown, Pike	53 min
Aug 22, 9:38 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	52 min
Aug 22, 10:20 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	40 min
Aug 22, 10:55 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	35 min
Aug 22, 11:02 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Montgomery	43 min
Aug 22, 11:33 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette	42 min
Aug 23, 12:13 AM CDT	Severe Thunderstorm Warning	LSX	Marion	62 min
Aug 23, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	48 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000 Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.