Alert archive / Illinois / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 6, NWS St. Louis, MO

February 9, 20014 counties in Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 9, 2001, 8:09 AM CST for 4 counties in Illinois. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Feb 9, 2001, 8:09 AM CST (14:09 UTC)
Expired
Feb 9, 2001, 9:00 AM CST
In force
51 min
Issued by
NWS St. Louis, MO
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 2.2 hours before the alert went out and 159 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 2001-02-09Temperature 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 2001-02-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 455 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
681 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
455 m²/s²
0-3 km storm-relative helicity
527 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.

896 
WUUS53 KLSX 091410
SVRSTL
ILC061-083-117-119-091500-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
809 AM CST FRI FEB 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MACOUPIN COUNTY IN CENTRAL ILLINOIS
  NORTHWESTERN MADISON COUNTY IN SOUTHWEST ILLINOIS
  GREENE COUNTY IN WEST CENTRAL ILLINOIS
  EASTERN JERSEY COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 900 AM CST

* AT 809 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 8 MILES SOUTHWEST OF CARROLLTON
  TO 10 MILES WEST OF ALTON...MOVING NORTHEAST AT 75 MPH.

* LOCATIONS IN THE PATH...
  BRIGHTON
  GREENFIELD
  ATHENSVILLE
  BUNKER HILL
  SHIPMAN
  CARLINVILLE
  PALMYRA
  GIRARD
  VIRDEN

EXTENSIVE WIND DAMAGE HAS BEEN REPORTED WITH THIS LINE OF STORMS IN 
GRAFTON.

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 3929 9055 3916 9031 3885 9018 3923 8968
          3959 8970 3978 8981

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 9, 7:37 AM CSTSevere Thunderstorm WarningLSXCalhoun38 min
Feb 9, 7:37 AM CSTSevere Thunderstorm WarningLSXGreene, Jersey38 min
Feb 9, 8:36 AM CSTSevere Thunderstorm WarningLSXMontgomery39 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2001Every severe thunderstorm warning in 2001

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.