Alert archive / Illinois / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 155, NWS Lincoln, IL

July 22, 2002Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 22, 2002, 7:24 PM CDT for Sangamon County, Illinois. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 22, 2002, 7:24 PM CDT (00:24 UTC)
Expired: Jul 22, 2002, 8:00 PM CDT
In force: 36 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 36 km from the middle of the area, began a volume at 00:27 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 22, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 78 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: 3265 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.3

Open this sounding in Storm Lab

The text

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

505 
WUUS53 KILX 230024
SVRSPI
ILC167-230100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
724 PM CDT MON JUL 22 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN SANGAMON COUNTY IN CENTRAL ILLINOIS

* UNTIL 800 PM CDT

* AT 724 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER MECHANICSBURG...OR ABOUT 15 MILES
  NORTHEAST OF SPRINGFIELD...MOVING NORTHEAST AT 35 MPH.

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 3987 8955 3974 8939 3979 8925 3991 8938
EH
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:29 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon	46 min
Jul 22, 8:00 PM CDT	Flash Flood Warning	ILX	McLean	4 hr
Jul 22, 8:25 PM CDT	Flash Flood Warning	ILX	Douglas	6 hr
Jul 22, 8:53 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland	67 min
Jul 22, 9:08 PM CDT	Tornado Warning	ILX	Cumberland	37 min
Jul 22, 9:22 PM CDT	Severe Thunderstorm Warning	ILX	Clark	38 min
Jul 22, 9:31 PM CDT	Flash Flood Warning	ILX	Edgar	4 hr
Jul 22, 9:36 PM CDT	Severe Thunderstorm Warning	ILX	Crawford	39 min
Jul 22, 10:51 PM CDT	Flash Flood Warning	ILX	Richland	4 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2002 Every severe thunderstorm warning in 2002

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.