Alert archive / Illinois / Tornado Warnings in 1999
Tornado Warning 36, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Jun 1, 1999, 6:55 PM CDT for Montgomery County, Illinois. It was in force for 35 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 1, 1999, 6:55 PM CDT (23:55 UTC)
- Expired
- Jun 1, 1999, 7:30 PM CDT
- In force
- 35 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Montgomery County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 1, 6:58 PM CDT | Tornado F3 | Raymond, IL | |
| Jun 1, 7:11 PM CDT | Tornado F0 | Harvel, IL | A small tornado formed northwest of Harvel and tracked northeast into Christian County. Damage was limited to trees and crops. |
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 |
|---|---|---|---|
| Jun 1, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.9 hours before the alert went out and 127 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
- 39 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 953 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
235 WFUS1 KSTL 012356 RRA TORSTL ILC135-020030- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 655 PM CDT TUE JUN 1 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... MONTGOMERY COUNTY ILLINOIS IN SOUTHWESTERN ILLINOIS * UNTIL 730 PM CDT * AT 653 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO 5 MILES NORTH OF LITCHFIELD... MOVING MOVING NORTHEAST AT 30 MPH. * LOCATIONS IN THE PATH... RAYMOND 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, 3:57 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 48 min |
| Jun 1, 4:43 PM CDT | Tornado Warning | LSX | Brown | 47 min |
| Jun 1, 5:31 PM CDT | Tornado Warning | LSX | Brown | 49 min |
| Jun 1, 6:09 PM CDT | Tornado Warning | LSX | Pike | 51 min |
| Jun 1, 6:31 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 49 min |
| Jun 1, 6:47 PM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 33 min |
Nearby
Tornado Warnings in Illinois, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.