Alert archive / Missouri / Tornado Warnings in 2001
Tornado Warning 10, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at May 20, 2001, 10:03 PM CDT for Reynolds County, Missouri. It was in force for 42 min. 1 report 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
- May 20, 2001, 10:03 PM CDT (03:03 UTC)
- Expired
- May 20, 2001, 10:45 PM CDT
- In force
- 42 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Reynolds County, MO
The radar
The St Louis radar (KLSX), 164 km from the middle of the area, began a volume at 03:06 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 |
|---|---|---|---|
| May 20, 10:35 PM CDT | Tornado F0 | Ellington, MO | Severe storm spotters reported a brief tornado southeast of Ellington. Damage was limited to a few uprooted trees. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 9:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 3.1 hours before the alert went out and 254 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
- 1724 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 670 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 178 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 8.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KLSX 210305 TORSTL MOC179-210345- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1003 PM CDT SUN MAY 20 2001 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... REYNOLDS COUNTY IN SOUTHEAST MISSOURI * UNTIL 1045 PM CDT * AT 1002 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A A SEVERE THUNDERSTORM WITH STRONG ROTATION 12 MILES SOUTHWEST OF ELLINGTON...MOVING NORTHEAST AT 30 MPH. * LOCATIONS IN THE PATH... ELLINGTON REDFORD TORNADOES WERE REPORTED WITH THIS STORM OVER SHANNON COUNTY. IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW A BASEMENT OFFERS THE BEST PROTECTION. IF A BASEMENT IS NOT AVAILABLE...MOVE TO THE LOWEST FLOOR AND SEEK SHELTER IN A SMALL INTERIOR ROOM. STAY AWAY FROM OUTSIDE WALLS AND WINDOWS. MOBILE HOMES SHOULD BE ABANDONED IN FAVOR OF A MORE SUBSTANTIAL STRUCTURE. DO NOT TRY TO OUTRUN A TORNADO IN A VEHICLE. LAT...LON 3728 9115 3710 9098 3711 9080 3745 9079
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 10:12 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 63 min |
| May 20, 10:46 PM CDT | Tornado Warning | LSX | Iron, Madison | 44 min |
Nearby
Tornado Warnings in Missouri, 2001Every tornado warning in 2001Tornadoes 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.