Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 78, NWS St. Louis, MO

May 26, 2004Macoupin County, Madison County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 26, 2004, 8:39 AM CDT for Macoupin County, Madison County, Illinois. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 26, 2004, 8:39 AM CDT (13:39 UTC)
Expired
May 26, 2004, 9:30 AM CDT
In force
51 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Macoupin County, IL, Madison County, IL

The radar

The St Louis radar (KLSX), 68 km from the middle of the area, began a volume at 13:42 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.

What was reported inside it

TimeReportWhereRemark
May 26, 8:45 AM CDTHAIL 0.75Brighton, IL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.7 hours before the alert went out and 175 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2004-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2004-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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.

000 
WUUS53 KLSX 261339
SVRLSX
ILC117-119-261430-

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS
  NORTHERN MADISON COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 930 AM CDT

* AT 838 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A SEVERE THUNDERSTORM NEAR DELHI...MOVING EAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PRAIRIETOWN
  DORSEY
  BUNKER HILL
  WORDEN
  STAUNTON
  CARPENTER
  WILSONVILLE
  LIVINGSTON
  ALHAMBRA
  MOUNT OLIVE
  BRIGHTON

THIS SEVERE THUNDERSTORM HAS A HISTORY OF PRODUCING LARGE DESTRUCTIVE
HAIL. CONSIDERABLE DAMAGE IS POSSIBLE. STAY INSIDE...AND AVOID
OUTSIDE WALLS AND WINDOWS

LAT...LON 3918 9015 3901 9016 3899 9028 3892 9025
          3887 9014 3883 8962 3900 8970 3918 8971

$$

GKS

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 8:13 AM CDTSevere Thunderstorm WarningLSXCalhoun32 min
May 26, 8:20 AM CDTSevere Thunderstorm WarningLSXJersey40 min
May 26, 8:51 AM CDTSevere Thunderstorm WarningLSXMonroe39 min
May 26, 8:56 AM CDTSevere Thunderstorm WarningLSXSaint Clair, Washington49 min
May 26, 1:10 PM CDTSevere Thunderstorm WarningLSXMonroe, Randolph50 min
May 26, 4:17 PM CDTSevere Thunderstorm WarningLSXMadison43 min
May 26, 4:59 PM CDTSevere Thunderstorm WarningLSXBond46 min
May 26, 5:47 PM CDTSevere Thunderstorm WarningLSXMarion28 min
May 26, 6:04 PM CDTSevere Thunderstorm WarningLSXMacoupin41 min
May 26, 6:19 PM CDTSevere Thunderstorm WarningLSXCalhoun26 min
May 26, 6:21 PM CDTSevere Thunderstorm WarningLSXMontgomery54 min
May 26, 6:40 PM CDTSevere Thunderstorm WarningLSXMadison50 min
May 26, 6:43 PM CDTSevere Thunderstorm WarningLSXMadison62 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2004Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.