Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 3, NWS St. Louis, MO

February 9, 2001Calhoun County, Illinois; Lincoln County, Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 9, 2001, 7:37 AM CST for Calhoun County, Illinois; Lincoln County, Saint Charles County, Missouri. It was in force for 38 min. 4 reports came from 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, with what was reported inside it.

The facts

Issued: Feb 9, 2001, 7:37 AM CST (13:37 UTC)
Expired: Feb 9, 2001, 8:15 AM CST
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Calhoun County, IL, Lincoln County, MO, Saint Charles County, MO

What was reported inside it

Time	Report	Where
Feb 9, 7:45 AM CST	Thunderstorm Wind 55 E	O Fallon, MO
Feb 9, 7:45 AM CST	Thunderstorm Wind 55 E	O Fallon, MO
Feb 9, 7:58 AM CST	Thunderstorm Wind 60 E	Grafton, IL
Feb 9, 8:10 AM CST	Thunderstorm Wind 55 E	Jerseyville, IL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.6 hours before the alert went out and 216 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: 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.

267 
WUUS53 KLSX 091337
SVRSTL
ILC013-061-083-MOC113-183-189-510-091415-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LINCOLN COUNTY IN EAST CENTRAL MISSOURI
  EASTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
  ST. LOUIS CITY IN EAST CENTRAL MISSOURI
  CALHOUN COUNTY IN WEST CENTRAL ILLINOIS
  GREENE COUNTY IN WEST CENTRAL ILLINOIS
  JERSEY COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 815 AM CST

* AT 737 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM DAVIS TO 25 MILES SOUTHWEST OF
  EUREKA...MOVING NORTHEAST AT 60 MPH.

* LOCATIONS IN THE PATH...
  DARDENNE PRAIRIE
  ELSBERRY
  OFALLON
  WINFIELD
  EUREKA
  HARDIN
  COTTLEVILLE
  ST. PETERS
  CHESTERFIELD
  CLARKSON VALLEY

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 3903 9117 3888 9083 3873 9076 3844 9076
          3859 9024 3912 9013 3922 9012 3970 9018

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 9, 7:37 AM CST	Severe Thunderstorm Warning	LSX	Greene, Jersey	38 min
Feb 9, 8:09 AM CST	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin, Madison	51 min
Feb 9, 8:36 AM CST	Severe Thunderstorm Warning	LSX	Montgomery	39 min
Feb 9, 7:13 AM CST	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	32 min
Feb 9, 7:13 AM CST	Severe Thunderstorm Warning	LSX	Crawford	32 min
Feb 9, 7:37 AM CST	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	38 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2001 Severe Thunderstorm Warnings in Illinois, 2001 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.