Alert archive / Missouri / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 46, NWS St. Louis, MO

April 10, 2001Audrain County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 10, 2001, 7:08 PM CDT for Audrain County, Missouri. It was in force for 67 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: Apr 10, 2001, 7:08 PM CDT (00:08 UTC)
Expired: Apr 10, 2001, 8:15 PM CDT
In force: 67 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Audrain County, MO

The radar

The St Louis radar (KLSX), 121 km from the middle of the area, began a volume at 00:07 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 watch it was issued in

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

Issued	Product	Office	Lasted
Apr 10, 7:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.1 hours before the alert went out and 293 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: 24 J/kg
Mixed-layer CIN: -340 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 125 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.

496 
WUUS53 KLSX 110010
SVRSTL
MOC007-110115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
708 PM CDT TUE APR 10 2001

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  AUDRAIN COUNTY IN CENTRAL MISSOURI

* UNTIL 815 PM CDT

* AT 708 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 20 MILES SOUTHWEST OF MEXICO...MOVING EAST
  AT 45 MPH.  THIS STORM HAS A HISTORY OF LARGE HAIL AND DAMAGING
  WINDS.

* LOCATIONS IN THE PATH...
  MEXICO
  MARTINSBURG
  LADDONIA
  FARBER
  VANDALIA
  THOMPSON
  BENTON CITY
  RUSH HILL

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 3934 9230 3926 9231 3924 9210 3906 9208
          3907 9167 3915 9164 3916 9143 3932 9145

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 7:17 PM CDT	Flash Flood Warning	LSX	Boone	118 min
Apr 10, 7:28 PM CDT	Tornado Warning	LSX	Montgomery	62 min
Apr 10, 7:49 PM CDT	Tornado Warning	LSX	Warren	56 min
Apr 10, 8:13 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	62 min
Apr 10, 8:27 PM CDT	Tornado Warning	LSX	Saint Charles, Saint Louis	63 min
Apr 10, 9:08 PM CDT	Tornado Warning	LSX	City of Saint Louis	67 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.