Alert archive / Illinois / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 138, NWS St. Louis, MO

May 12, 2000Greene County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 12, 2000, 4:30 PM CDT for Greene County, Illinois. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 12, 2000, 4:30 PM CDT (21:30 UTC)
Expired
May 12, 2000, 5:20 PM CDT
In force
50 min
Issued by
NWS St. Louis, MO
Area
Whole counties

County Greene County, IL

The watch it was issued in

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

IssuedProductOfficeLasted
May 12, 2:00 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.5 hours before the alert went out and 177 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 2000-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2035 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, Lincoln, IL at 12:00Z on 2000-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 283 square meters per square second.1939587897Sfc1 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
2035 J/kg
Mixed-layer CIN
-305 J/kg
Mixed-layer LCL
1023 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
283 m²/s²
0-3 km storm-relative helicity
282 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 122130
SVRSTL
ILC061-122220-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
430 PM CDT FRI MAY 12 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GREENE COUNTY IN SOUTHWESTERN ILLINOIS

* UNTIL 520 PM CDT

* AT 428 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM SOUTHWEST OF OLD KANE... MOVING EAST NORTHEAST
  AT 35 MPH.

* LOCATIONS THAT WILL BE AFFECTED...
  OLD KANE
  KANE
  ROCKBRIDGE
  JALAPA


THE PRIMARY SEVERE WEATHER THREAT IS DAMAGING HAIL. LARGE HAIL CAN
CAUSE EXTENSIVE PROPERTY DAMAGE AN SERIOUS INJURY TO_ PEOPLE CAUGHT
OUTDOORS. MOVE INSIDE A STURDY BUILDING IMMEDIATELY.


RP/ST

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 3:41 PM CDTSevere Thunderstorm WarningLSXCalhoun, Greene49 min
May 12, 4:09 PM CDTSevere Thunderstorm WarningLSXJersey51 min
May 12, 4:42 PM CDTSevere Thunderstorm WarningLSXMacoupin48 min
May 12, 5:02 PM CDTSevere Thunderstorm WarningLSXJersey, Macoupin48 min
May 12, 5:42 PM CDTSevere Thunderstorm WarningLSXMontgomery58 min
May 12, 6:01 PM CDTSevere Thunderstorm WarningLSXBond, Madison64 min
May 12, 6:05 PM CDTTornado WarningLSXBond, Madison50 min
May 12, 6:49 PM CDTTornado WarningLSXFayette51 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2000Every severe thunderstorm warning in 2000

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.