Alert archive / Missouri / Tornado Warnings in 1999
Tornado Warning 37, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jun 1, 1999, 7:25 PM CDT for Jefferson County, Missouri. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jun 1, 1999, 7:25 PM CDT (00:25 UTC)
- Expired
- Jun 1, 1999, 8:15 PM CDT
- In force
- 50 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Jefferson County, MO
The radar
The St Louis radar (KLSX), 50 km from the middle of the area, began a volume at 00:24 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 |
|---|---|---|---|
| Jun 1, 5:30 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 268 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
- 1323 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 945 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 162 m²/s²
- 0-3 km storm-relative helicity
- 315 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 7.0
The text
As transmitted, in the capitals the NWS used until 2016.
167 WFUS1 KSTL 020026 RRA TORSTL MOC099-020115- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 725 PM CDT TUE JUN 1 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... NORTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI * UNTIL 815 PM CDT * AT 722 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 3 MILES EAST OF ST CLAIR... MOVING EAST NORTHEAST AT 25 MPH. A TORNADO HAS BEEN REPORTED WITH THIS STORM. * LOCATIONS IN THE PATH... DITTMER CEDAR HILL HOUSE SPRINGS IF YOU ARE IN THE PATH OF THIS STORM...SEEK SHELTER NOW A BASEMENT OFFERS THE BEST PROTECTION. IF 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 FG/RP
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 7:27 PM CDT | Tornado Warning | LSX | Washington | 48 min |
| Jun 1, 7:32 PM CDT | Severe Thunderstorm Warning | LSX | Saint Louis | 48 min |
| Jun 1, 7:36 PM CDT | Tornado Warning | LSX | Crawford | 49 min |
| Jun 1, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 62 min |
Nearby
Tornado Warnings in Missouri, 1999Every tornado warning in 1999Tornadoes in 1999
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.