Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 99, NWS St. Louis, MO

May 26, 2004Madison County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 26, 2004, 6:43 PM CDT for Madison County, Illinois. It was in force for 62 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 26, 2004, 6:43 PM CDT (23:43 UTC)
Expired: May 26, 2004, 7:45 PM CDT
In force: 62 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Madison County, IL

The radar

The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 23:42 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 26, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.7 hours before the alert went out and 188 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: 1078 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 43 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.

739 
WUUS53 KLSX 262343
SVRLSX
ILC119-270045-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
643 PM CDT WED MAY 26 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MADISON COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 745 PM CDT

* AT 643 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 12 MILES WEST OF GRANITE CITY...MOVING EAST AT
  55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GRANITE CITY
  GLEN CARBON
  MARYVILLE
  PONTOON BEACH
  TROY
  ST. JACOB
  MARINE
  HIGHLAND
  EDWARDSVILLE

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT...LON 3891 9017 3868 9017 3867 8963 3898 8966

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:13 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun	32 min
May 26, 8:20 AM CDT	Severe Thunderstorm Warning	LSX	Jersey	40 min
May 26, 8:39 AM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Madison	51 min
May 26, 8:51 AM CDT	Severe Thunderstorm Warning	LSX	Monroe	39 min
May 26, 8:56 AM CDT	Severe Thunderstorm Warning	LSX	Saint Clair, Washington	49 min
May 26, 1:10 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	50 min
May 26, 4:17 PM CDT	Severe Thunderstorm Warning	LSX	Madison	43 min
May 26, 4:59 PM CDT	Severe Thunderstorm Warning	LSX	Bond	46 min
May 26, 5:47 PM CDT	Severe Thunderstorm Warning	LSX	Marion	28 min
May 26, 6:04 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	41 min
May 26, 6:19 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	26 min
May 26, 6:21 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	54 min
May 26, 6:40 PM CDT	Severe Thunderstorm Warning	LSX	Madison	50 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2004 Every severe thunderstorm warning in 2004

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.