Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 249, NWS St. Louis, MO

June 23, 2000Greene County, Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 23, 2000, 6:58 PM CDT for Greene County, Macoupin County, Montgomery County, Illinois. It was in force for 47 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: Jun 23, 2000, 6:58 PM CDT (23:58 UTC)
Expired: Jun 23, 2000, 7:45 PM CDT
In force: 47 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Greene County, IL, Macoupin County, IL, Montgomery County, IL

The radar

The St Louis radar (KLSX), 87 km from the middle of the area, began a volume at 00:03 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
Jun 23, 7:30 PM CDT	Thunderstorm Wind 52 E	White Hall, IL	The local newspaper reported trees down in White Hall.

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
Jun 23, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 12.0 hours before the alert went out and 159 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: 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

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

280 
WUUS53 KLSX 232359
SVRSTL
ILC061-117-135-240045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
658 PM CDT FRI JUN 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN MACOUPIN COUNTY IN CENTRAL ILLINOIS
  NORTHWESTERN MONTGOMERY COUNTY IN CENTRAL ILLINOIS
  GREENE COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 745 PM CDT

* AT 658 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  A LINE OF SEVERE THUNDERSTORMS OVER ATHENSVILLE...MOVING SOUTHEAST 
  AT 25 MPH.

* LOCATIONS IN THE PATH...
  ATHENSVILLE
  GREENFIELD
  PALMYRA
  CARLINVILLE
  WHITE HALL
  WAGGONER

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 WHERE WATER COVERS THE ROAD.

LAT...LON 3953 9015 3954 9059 3929 9061 3919 9044
          3927 9018 3921 9013 3920 8954 3953 8955

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 3:32 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	43 min
Jun 23, 3:49 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	41 min
Jun 23, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Adams	51 min
Jun 23, 5:21 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Pike	39 min
Jun 23, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Brown	45 min
Jun 23, 6:01 PM CDT	Severe Thunderstorm Warning	LSX	Pike	59 min
Jun 23, 6:59 PM CDT	Severe Thunderstorm Warning	LSX	Pike	46 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.