Alert archive / Missouri / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 182, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Sep 8, 2001, 9:43 PM CDT for Jefferson County, Saint Louis County, Missouri. It was in force for 47 min. 6 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
- Sep 8, 2001, 9:43 PM CDT (02:43 UTC)
- Expired
- Sep 8, 2001, 10:30 PM CDT
- In force
- 47 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Jefferson County, MO, Saint Louis County, MO
The radar
The St Louis radar (KLSX), 32 km from the middle of the area, began a volume at 02:44 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 8, 9:45 PM CDT | Hail 0.75 | Dittmer, MO | The Sheriff's department reported 3/4 inch hail. |
| Sep 8, 10:15 PM CDT | Thunderstorm Wind 55 E | Imperial, MO | The Sheriff's department reported trees down blocking some streets in Imperial. |
| Sep 8, 10:18 PM CDT | Thunderstorm Wind 55 E | Lemay, MO | Storm spotters reported a couple of trees down. |
| Sep 8, 10:25 PM CDT | Hail 0.75 | Mehlville, MO | |
| Sep 8, 10:25 PM CDT | Thunderstorm Wind 55 E | Mehlville, MO | |
| Sep 8, 10:29 PM CDT | Thunderstorm Wind 55 E | Arnold, MO | The Missouri Highway Patrol reported trees down southwest of Arnold. |
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 00:00Z, 2.7 hours before the alert went out and 255 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.
- Mixed-layer CAPE
- 41 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1461 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
508
WUUS53 KLSX 090244
SVRSTL
MOC099-189-090330-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
943 PM CDT SAT SEP 8 2001
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
SOUTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI
* UNTIL 1030 PM CDT
* AT 943 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM OVER HOUSE SPRINGS...MOVING NORTHEAST AT 20
MPH.
* LOCATIONS IN THE PATH...
HIGH RIDGE
MURPHY
SUNSET HILLS
CRESTWOOD
AFFTON
LAKESHIRE
OAKLAND
SHREWSBURY
WEBSTER GROVES
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.
THIS THUNDERSTORM IS CAPABLE OF PRODUCING LARGE HAIL THAT CAN CAUSE
SERIOUS INJURY AND EXTENSIVE PROPERTY DAMAGE. TAKE SHELTER INSIDE OF
A STURDY BUILDING NOW
LAT...LON 3839 9075 3828 9070 3827 9058 3829 9038
3854 9027 3867 9042 3858 9062
TS/JCThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 7:24 PM CDT | Severe Thunderstorm Warning | LSX | Iron | 51 min |
| Sep 8, 8:59 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 46 min |
| Sep 8, 9:15 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson | 30 min |
| Sep 8, 9:24 PM CDT | Flash Flood Warning | LSX | Crawford | 3 hr |
| Sep 8, 10:19 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 41 min |
| Sep 9, 12:15 AM CDT | Flash Flood Warning | LSX | Crawford | 4 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.