Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 191, NWS St. Louis, MO

October 23, 2001Madison County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Oct 23, 2001, 11:42 AM CDT for Madison County, Missouri. It was in force for 48 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: Oct 23, 2001, 11:42 AM CDT (16:42 UTC)
Expired: Oct 23, 2001, 12:30 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Madison County, MO

The radar

The St Louis radar (KLSX), 134 km from the middle of the area, began a volume at 16:43 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

Little Rock, AR (KLZK), launched 12:00Z, 4.7 hours before the alert went out and 301 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: 693 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 506 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

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

186 
WUUS53 KLSX 231643
SVRSTL
MOC123-231730-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1142 AM CDT TUE OCT 23 2001

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MADISON COUNTY IN SOUTHEAST MISSOURI

* UNTIL 1230 PM CDT

* AT 1142 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ROSELLE...MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IN THE PATH...
  JUNCTION CITY
  FREDERICKTOWN

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.

THE PRIMARY THREAT POSED BY THIS STORM IS DAMAGING WINDS. MOVE
QUICKLY TO THE INTERIOR PORTION OF A STURDY SHELTER...AND STAY AWAY
FROM OUTSIDE WALLS AND WINDOWS.

LAT...LON 3764 9056 3733 9055 3732 9015 3764 9016

RP

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 2:00 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	45 min
Oct 23, 2:14 PM CDT	Severe Thunderstorm Warning	LSX	Madison	46 min
Oct 23, 5:02 PM CDT	Tornado Warning	LSX	Cole	43 min
Oct 23, 5:21 PM CDT	Tornado Warning	LSX	Osage	54 min
Oct 23, 6:09 PM CDT	Tornado Warning	LSX	Gasconade, Osage	51 min
Oct 23, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	64 min

Nearby

Severe Thunderstorm Warnings in Missouri, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.