Alert archive / Missouri / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 441, NWS St. Louis, MO

August 23, 2000Jefferson County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 23, 2000, 11:57 PM CDT for Jefferson County, Missouri. It was in force for 63 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: Aug 23, 2000, 11:57 PM CDT (04:57 UTC)
Expired: Aug 24, 2000, 1:00 AM CDT
In force: 63 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Jefferson County, MO

The radar

The St Louis radar (KLSX), 34 km from the middle of the area, began a volume at 05:02 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
Aug 23, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 5.0 hours before the alert went out and 258 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: 1082 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1541 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 240509
SVRSTL
MOC099-240600-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING...RETRANSMISSION
NATIONAL WEATHER SERVICE ST LOUIS MO
1157 PM CDT WED AUG 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 100 AM CDT

* AT 1157 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM NEAR ST CHARLES TO NEAR NEW 
  HAVEN... MOVING SOUTHEAST AT 50 MPH.

* LOCATIONS IN THE PATH...
  BYRNES MILL
  HOUSE SPRINGS
  HIGH RIDGE
  MURPHY
  ANTONIA
  ARNOLD
  BARNHART
  PEVELY
  CEDAR HILL
  OTTO
  SCOTSDALE
;
THIS STORM HAS A HISTORY OF DAMAGING WINDS. TAKE SHELTER IN A STURDY
BUILDING IMMEDIATELY.

LAT...LON 3848 9073 3828 9076 3828 9037 3840 9034
          3850 9046

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 9:52 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Shelby	38 min
Aug 23, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe	42 min
Aug 23, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Boone	42 min
Aug 23, 10:04 PM CDT	Severe Thunderstorm Warning	LSX	Ralls	41 min
Aug 23, 10:36 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	39 min
Aug 23, 10:40 PM CDT	Severe Thunderstorm Warning	LSX	Pike	50 min
Aug 23, 10:45 PM CDT	Severe Thunderstorm Warning	LSX	Ralls	30 min
Aug 23, 10:46 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	59 min
Aug 23, 10:58 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	62 min
Aug 23, 11:02 PM CDT	Tornado Warning	LSX	Montgomery	28 min
Aug 23, 11:07 PM CDT	Severe Thunderstorm Warning	LSX	Warren	53 min
Aug 23, 11:21 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	54 min
Aug 23, 11:40 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	65 min
Aug 23, 11:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	45 min
Aug 24, 1:36 AM CDT	Flash Flood Warning	LSX	Audrain, Montgomery	5 hr
Aug 24, 2:28 AM CDT	Flash Flood Warning	LSX	Franklin, Warren	5 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2000 Every 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; radar from the NEXRAD Level II archive.