Alert archive / Illinois / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 151, NWS Lincoln, IL

August 2, 2001Cass County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Aug 2, 2001, 6:22 PM CDT for Cass 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 2, 2001, 6:22 PM CDT (23:22 UTC)
Expired: Aug 2, 2001, 7:15 PM CDT
In force: 53 min
Issued by: NWS Lincoln, IL
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Cass County, IL

The radar

The Lincoln radar (KILX), 82 km from the middle of the area, began a volume at 23:26 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 2, 6:31 PM CDT	Thunderstorm Wind 50 E	Ashland, IL	Tree was blown 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 2, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 11.4 hours before the alert went out and 179 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: 2814 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 112 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.

996 
WUUS53 KILX 022322
SVRSPI
ILC017-030015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
622 PM CDT THU AUG 2 2001

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CASS COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 715 PM CDT

* AT 622 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM ABOUT 3 MILES NORTH OF BEARDSTOWN...MOVING 
  SOUTHEAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CHANDLERVILLE
  VIRGINIA
  ASHLAND

DAMAGING WINDS IN EXCESS OF 75 MPH WILL ACCOMPANY THIS DANGEROUS
STORM. GO TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. ABANDON CARS AND MOBILE HOMES IF YOU ARE IN THE
WARNED AREA.

REPORT SEVERE WEATHER OR ANY STORM DAMAGE TO YOUR LOCAL ESDA...OR THE
NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER
SERVICE. STAY TUNED FOR LATER STATEMENTS.

LAT...LON 4011 9035 4001 9051 3989 9052 3988 8997
          4006 9004 4006 9023

AUTEN

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 2, 4:03 PM CDT	Severe Thunderstorm Warning	ILX	Knox	57 min
Aug 2, 4:30 PM CDT	Severe Thunderstorm Warning	ILX	Stark	60 min
Aug 2, 4:46 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Peoria	59 min
Aug 2, 4:51 PM CDT	Severe Thunderstorm Warning	ILX	Marshall	54 min
Aug 2, 4:57 PM CDT	Severe Thunderstorm Warning	ILX	Knox	33 min
Aug 2, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Mason, Tazewell	80 min
Aug 2, 5:43 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Schuyler	62 min
Aug 2, 5:51 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Menard	69 min
Aug 2, 6:13 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	77 min
Aug 2, 6:39 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	66 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2001 Every severe thunderstorm warning in 2001

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.