Alert archive / Illinois / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 83, NWS St. Louis, MO

May 8, 2003Macoupin County, Montgomery County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 8, 2003, 2:56 PM CDT for Macoupin County, Montgomery County, Illinois. It was in force for 49 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: May 8, 2003, 2:56 PM CDT (19:56 UTC)
Expired: May 8, 2003, 3:45 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Macoupin County, IL, Montgomery County, IL

The radar

The Lincoln radar (KILX), 105 km from the middle of the area, began a volume at 19:58 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
May 8, 12:20 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.9 hours before the alert went out and 130 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 161 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.

037 
WUUS53 KLSX 081956
SVRLSX
ILC117-135-082045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
256 PM CDT THU MAY 8 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS
  SOUTHEASTERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 345 PM CDT

* AT 256 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHWEST OF WILSONVILLE...MOVING
  EAST NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GILLESPIE
  BENLD
  MOUNT OLIVE
  LITCHFIELD
  HILLSBORO
  TAYLOR SPRINGS
  COFFEEN
  WITT
  NOKOMIS

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 3925 9000 3900 8995 3906 8927 3923 8928
          3924 8916 3936 8915 3936 8931

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 1:29 PM CDT	Flash Flood Warning	LSX	Calhoun	3 hr
May 8, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	50 min
May 8, 2:08 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	52 min
May 8, 3:02 PM CDT	Tornado Warning	LSX	Macoupin, Montgomery	28 min
May 8, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	64 min
May 8, 3:16 PM CDT	Tornado Warning	LSX	Bond, Montgomery	29 min
May 8, 3:27 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	48 min
May 8, 3:41 PM CDT	Tornado Warning	LSX	Bond, Fayette	49 min
May 8, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair	62 min
May 8, 3:59 PM CDT	Tornado Warning	LSX	Marion	31 min
May 8, 4:03 PM CDT	Severe Thunderstorm Warning	LSX	Madison	57 min
May 8, 4:09 PM CDT	Severe Thunderstorm Warning	LSX	Washington	66 min
May 8, 4:29 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	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.