Alert archive / Illinois / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 113, NWS St. Louis, MO

May 9, 2003Washington County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 9, 2003, 8:32 PM CDT for Washington County, Illinois. It was in force for 28 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 9, 2003, 8:32 PM CDT (01:32 UTC)
Expired
May 9, 2003, 9:00 PM CDT
In force
28 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

County Washington County, IL

The radar

The St Louis radar (KLSX), 110 km from the middle of the area, began a volume at 01:33 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

Nashville Metro, TN (KBNA), launched 00:00Z, 1.5 hours before the alert went out and 356 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, Nashville Metro, TN at 00:00Z on 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2360 joules per kilogram.LCLLFCEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.19395878Sfc1 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
2360 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1209 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

808 
WUUS53 KLSX 100132
SVRLSX
ILC189-100200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
832 PM CDT FRI MAY 9 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 900 PM CDT

* AT 832 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 6 MILES SOUTHEAST OF LIVELY GROVE...MOVING
  NORTHEAST AT 65 MPH. THE PRIMARY THREAT FROM THIS STORM WILL BE
  DAMAGING HAIL.

* LOCATIONS IMPACTED INCLUDE...
  NASHVILLE
  ASHLEY
  IRVINGTON

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.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 3843 8972 3822 8971 3822 8961 3822 8916
          3850 8915

$$

CARNEY

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 7:42 PM CDTTornado WarningLSXGreene, Macoupin48 min
May 9, 8:12 PM CDTTornado WarningLSXMontgomery33 min
May 9, 8:14 PM CDTFlash Flood WarningLSXMacoupin4 hr
May 9, 8:27 PM CDTTornado WarningLSXMacoupin33 min
May 9, 8:43 PM CDTTornado WarningLSXMontgomery32 min
May 9, 9:02 PM CDTSevere Thunderstorm WarningLSXPike43 min
May 9, 9:11 PM CDTTornado WarningLSXPike49 min
May 9, 9:18 PM CDTSevere Thunderstorm WarningLSXBrown27 min
May 9, 10:12 PM CDTSevere Thunderstorm WarningLSXAdams33 min
May 9, 11:42 PM CDTFlash Flood WarningLSXMacoupin3 hr
May 10, 6:25 AM CDTSevere Thunderstorm WarningLSXGreene, Pike50 min
May 10, 6:31 AM CDTFlash Flood WarningLSXPike4 hr
May 10, 7:47 AM CDTSevere Thunderstorm WarningLSXMacoupin28 min
May 10, 8:06 AM CDTSevere Thunderstorm WarningLSXMacoupin, Montgomery24 min
May 10, 8:12 AM CDTSevere Thunderstorm WarningLSXCalhoun, Jersey, Madison48 min
May 10, 8:19 AM CDTTornado WarningLSXMadison41 min
May 10, 8:31 AM CDTSevere Thunderstorm WarningLSXMontgomery29 min
May 10, 8:41 AM CDTTornado WarningLSXMacoupin34 min
May 10, 8:43 AM CDTSevere Thunderstorm WarningLSXMadison47 min
May 10, 9:11 AM CDTFlash Flood WarningLSXGreene4 hr
May 10, 9:18 AM CDTTornado WarningLSXBond, Madison27 min
May 10, 10:15 AM CDTSevere Thunderstorm WarningLSXFayette30 min
May 10, 11:07 AM CDTFlash Flood WarningLSXCalhoun3 hr
May 10, 11:53 AM CDTSevere Thunderstorm WarningLSXSaint Clair52 min
May 10, 12:30 PM CDTSevere Thunderstorm WarningLSXClinton45 min
May 10, 6:21 PM CDTTornado WarningLSXAdams39 min
May 10, 6:53 PM CDTTornado WarningLSXAdams52 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2003Every 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.