Alert archive / Illinois / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 232, NWS Lincoln, IL

July 21, 2003Knox County, Stark County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 21, 2003, 12:21 AM CDT for Knox County, Stark County, Illinois. It was in force for 54 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 21, 2003, 12:21 AM CDT (05:21 UTC)
Expired: Jul 21, 2003, 1:15 AM CDT
In force: 54 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Knox County, IL, Stark County, IL

The radar

The Quad Cities radar (KDVN), 78 km from the middle of the area, began a volume at 05:22 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 nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 5.4 hours before the alert went out and 75 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: 3041 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 251 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.6

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KILX 210521
SVRILX
ILC095-175-210615-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1218 AM CDT MON JUL 21 2003

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STARK COUNTY IN NORTH CENTRAL ILLINOIS
  KNOX COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 115 AM CDT

* AT 1218 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 37 MILES NORTH OF RIO TO 42 MILES
  NORTHWEST OF RIO...OR JUST EAST OF THE QUAD CITIES...MOVING SOUTHEAST
  AT 40 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  RIO
  WATAGA
  ONEIDA
  GALESBURG
  ALTONA
  LA FAYETTE
  ABINGDON
  DAHINDA

THIS STORM IS CAPABLE OF PRODUCING WINDS IN EXCESS OF 60 MPH...
DAMAGING HAIL...FREQUENT LIGHTNING...AND VERY HEAVY RAIN. TAKE
SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

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 4116 8991 4103 8978 4095 8998 4081 9025
          4081 9045 4116 9046

$$

KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:13 AM CDT	Severe Thunderstorm Warning	ILX	Knox, Peoria, Stark	62 min
Jul 21, 1:30 AM CDT	Severe Thunderstorm Warning	ILX	Marshall	60 min
Jul 21, 1:34 AM CDT	Severe Thunderstorm Warning	ILX	Fulton	26 min
Jul 21, 1:36 AM CDT	Tornado Warning	ILX	Marshall, Stark	54 min
Jul 21, 1:43 AM CDT	Severe Thunderstorm Warning	ILX	Tazewell, Woodford	62 min
Jul 21, 1:58 AM CDT	Severe Thunderstorm Warning	ILX	McLean	62 min
Jul 21, 2:14 AM CDT	Severe Thunderstorm Warning	ILX	Logan	61 min
Jul 21, 2:19 AM CDT	Flash Flood Warning	ILX	Peoria, Tazewell	6 hr
Jul 21, 2:40 AM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon	65 min
Jul 21, 2:51 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, Piatt	54 min
Jul 21, 3:18 AM CDT	Flash Flood Warning	ILX	Logan	3 hr
Jul 21, 3:37 AM CDT	Flash Flood Warning	ILX	DeWitt, Macon, Piatt	6 hr
Jul 21, 3:50 AM CDT	Flash Flood Warning	ILX	Champaign, Vermilion	6 hr
Jul 21, 3:54 AM CDT	Severe Thunderstorm Warning	ILX	Sangamon	51 min
Jul 21, 4:04 AM CDT	Flash Flood Warning	ILX	Douglas	6 hr
Jul 21, 4:09 AM CDT	Severe Thunderstorm Warning	ILX	Coles	51 min
Jul 21, 4:31 AM CDT	Severe Thunderstorm Warning	ILX	Clark, Cumberland	44 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2003 Every severe thunderstorm warning in 2003

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.