Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 412, NWS St. Louis, MO

August 22, 2000Brown County, Pike County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 22, 2000, 8:22 PM CDT for Brown County, Pike County, Illinois. It was in force for 53 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, 8:22 PM CDT (01:22 UTC)
Expired: Aug 22, 2000, 9:15 PM CDT
In force: 53 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Brown County, IL, Pike County, IL

The radar

The St Louis radar (KLSX), 133 km from the middle of the area, began a volume at 01:21 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, 8:55 PM CDT	Thunderstorm Wind 55 E	Barry, IL	Thunderstorm wind gusts caused scattered damage in Barry. A few trees and power lines were downed, the chimney on a home was blown down, and a trailer at a service station was blown over.

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

Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 195 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: 1783 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 894 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 135 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 9.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 230124
SVRSTL
ILC009-149-230215-

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BROWN COUNTY IN WEST CENTRAL ILLINOIS
  PIKE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 915 PM CDT

* AT 822 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 12 MILES NORTHWEST OF MOUNT
  STERLING TO 6 MILES WEST OF BARRY...MOVING EAST AT 30 MPH.

* LOCATIONS IN THE PATH...
  BARRY
  BUCKHORN
  MOUNT STERLING
  PITTSFIELD
  GRIGGSVILLE

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERQE WATER COVERS THE ROAD.

LAT...LON 4013 9092 3977 9092 3965 9126 3953 9079
          4010 9043

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, 9:05 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene	55 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.