Alert archive / Illinois / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 38, NWS Lincoln, IL

April 30, 2003Marshall County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 30, 2003, 9:44 PM CDT for Marshall County, Illinois. It was in force for 61 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: Apr 30, 2003, 9:44 PM CDT (02:44 UTC)
Expired: Apr 30, 2003, 10:45 PM CDT
In force: 61 min
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Marshall County, IL

The radar

The Lincoln radar (KILX), 99 km from the middle of the area, began a volume at 02:47 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 30, 5:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.7 hours before the alert went out and 110 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: 1022 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 839 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 457 m²/s²
0-3 km storm-relative helicity: 611 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

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

316 
WUUS53 KILX 010244
SVRILX
ILC123-010345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
944 PM CDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARSHALL COUNTY IN CENTRAL ILLINOIS

* UNTIL 1045 PM CDT

* AT 944 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 9 MILES NORTH OF CAMP GROVE TO 6
  MILES SOUTHWEST OF CAMP GROVE...OR FROM 15 MILES EAST OF KEWANEE TO
  16 MILES WEST OF LACON...MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORMS WILL BE NEAR...
  SPARLAND
  LACON
  HENRY
  VARNA
  TOLUCA

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 4114 8965 4100 8965 4098 8944 4094 8945
          4095 8908 4112 8908

$$

GOETSCH

NNNN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 30, 8:57 PM CDT, 47 minutes earlier.

Area forecast discussion, Apr 30, 8:57 PM CDT, 47 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LINCOLN IL
857 PM CDT WED APR 30 2003

ZONES STILL IN GOOD SHAPE WITH WATCH AFFECT AREAS ALONG AND NORTH OF
A FULTON COUNTY TO MCLEAN COUNTY LINE. WILL NEED TO UPDATE LATER
THIS EVENING WHEN WATCH EXPIRES OR IS REPLACED.

.ILX...SEVERE THUNDERSTORM WATCH UNTIL 11 PM FOR NORTH CENTRAL
ILLINOIS.

BYRD

Hazardous weather outlook, Apr 30, 11:00 AM CDT, 10 hours 44 minutes before

ILZ027>031-036>038-040>057-061>063-066>068-071>073-011100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LINCOLN IL
1100 AM CDT WED APR 30 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND
SOUTHEAST ILLINOIS.

.DAY ONE...TODAY AND TONIGHT

A WARM FRONT STRETCHED ACROSS CENTRAL ILLINOIS LATE THIS MORNING IS
EXPECTED TO LIFT NORTH INTO NORTHERN ILLINOIS THIS AFTERNOON.
THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS CENTRAL ILLINOIS
DURING THE COURSE OF THE AFTERNOON. SEVERE WEATHER WILL ALSO BE
POSSIBLE THIS AFTERNOON AND INTO TONIGHT. LARGE HAIL AND DAMAGING
WINDS WILL BE THE MAIN SEVERE WEATHER THREAT...WITH ISOLATED
TORNADOES NOT OUT OF QUESTION. THE GREATEST RISK FOR SEVERE WEATHER
WILL BE ALONG AND NORTH OF A LINE FROM QUINCY TO BLOOMINGTON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

SEVERE THUNDERSTORMS WILL ALSO BE POSSIBLE ON THURSDAY AND THURSDAY
NIGHT OVER MUCH OF THE AREA AS A COLD FRONT MOVES THROUGH.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE POSSIBLE THROUGH THURSDAY NIGHT.

&&
THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC
AND CLIMATE INFORMATION...IS AVAILABLE ON THE WEB AT:

HTTP://WWW.CRH.NOAA.GOV/ILX (ALL IN LOWER CASE)

PLAHMER

In the hours before

Special weather statement, Apr 30, 5:54 PM CDT, 3 hours 50 minutes before

ILZ027>031-036>038-040>051-053-302330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
554 PM CDT WED APR 30 2003

...SEVERE THUNDERSTORM WATCH 187 HAS EXPIRED...
...SEVERE THUNDERSTORM WATCH 189 IS IN EFFECT UNTIL 11 PM...

THE FOLLOWING COUNTIES ARE NO LONGER IN A SEVERE THUNDERSTORM
WATCH...SCHUYLER...CASS...MENARD...MASON...LOGAN...DEWITT...
SCOTT...MORGAN...SANGAMON...MACON...PIATT...CHAMPAIGN...AND
VERMILION.

DUE TO THE CONTINUED THREAT OF SEVERE THUNDERSTORMS...A NEW SEVERE
THUNDERSTORM WATCH HAS BEEN ISSUED. SEVERE THUNDERSTORM WATCH NUMBER
189 IS IN EFFECT FOR THE FOLLOWING COUNTIES...KNOX...STARK...
MARSHALL...PEORIA...WOODFORD...FULTON...TAZEWELL...AND MCLEAN.

GOETSCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:12 PM CDT	Tornado Warning	ILX	Knox	63 min
Apr 30, 8:17 PM CDT	Tornado Warning	ILX	Knox	58 min
Apr 30, 8:35 PM CDT	Tornado Warning	ILX	Stark	55 min
Apr 30, 9:16 PM CDT	Severe Thunderstorm Warning	ILX	Knox	74 min
Apr 30, 9:31 PM CDT	Severe Thunderstorm Warning	ILX	Stark	59 min
Apr 30, 9:44 PM CDT	Flash Flood Warning	ILX	Knox, Stark	6 hr
Apr 30, 10:31 PM CDT	Severe Thunderstorm Warning	ILX	Knox	59 min
May 1, 1:17 AM CDT	Flash Flood Warning	ILX	Marshall	6 hr
May 1, 1:44 AM CDT	Tornado Warning	ILX	McLean	31 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.