Alert archive / Illinois / Tornado Warnings in 1999
Tornado Warning 27, NWS St. Louis, MO
NWS St. Louis, MO issued this tornado warning at Apr 8, 1999, 8:27 PM CDT for Greene County, Illinois. It was in force for 48 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
- Apr 8, 1999, 8:27 PM CDT (01:27 UTC)
- Expired
- Apr 8, 1999, 9:15 PM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Greene County, IL
The radar
The St Louis radar (KLSX), 77 km from the middle of the area, began a volume at 01:27 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 |
|---|---|---|---|
| Apr 8, 5:15 PM CDT | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.5 hours before the alert went out and 177 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
- 859 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1075 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 344 m²/s²
- 0-3 km storm-relative helicity
- 449 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 8.7
The text
As transmitted, in the capitals the NWS used until 2016.
999 WFUS1 KSTL 090128 RRA TORSTL ILC061-090215- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 827 PM CDT THU APR 8 1999 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * TORNADO WARNING FOR... NORTHWESTERN GREENE COUNTY IN WEST CENTRAL ILLINOIS * UNTIL 915 PM CDT * AT 826 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A TORNADO FAR SOUTHEAST PIKE COUNTY ILLINOIS... MOVING NORTHEAST AT 45 MPH. * LOCATIONS IN THE PATH... PATTERSON WEST ROADHOUSE BARROW THIS IS A DANGEROUS SITUATION IF IN THE PATH...TAKE COVER NOW MOVE TO A BASEMENT IF AVAILABLE. IF NOT...STAY ON THE LOWEST LEVEL AND GO TO A SMALL INTERIOR ROOM. MOBILE HOMES AND AUTOMOBILESHOULD BE ABANDONED IN FAVOR OF A STRONG STRUCTURE. AS A LAST RESORT... MOVE TO A DITCH OR CULVERT AND COVER YOUR HEAD. TS/RP
What forecasters said that day
The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Local storm report, Apr 8, 5:45 PM CDT, 2 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
545 PM CDT THU APR 08 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0533 PM NOVELTY MO 1 INCH HAIL
04/08/99 KNOX
0538 PM NOVELTY MO 1.75 INCH HAIL
04/08/99 KNOX REPORTED 2 MILES WEST OF
NOVELTY.
WDBLocal storm report, Apr 8, 5:45 PM CDT, 2 hours 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ST LOUIS MISSOURI
545 PM CDT THU APR 08 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0533 PM NOVELTY MO 1 INCH HAIL
04/08/99 KNOX
0538 PM NOVELTY MO 1.75 INCH HAIL
04/08/99 KNOX REPORTED 2 MILES WEST OF
NOVELTY.
WDBSpecial weather statement, Apr 8, 7:47 PM CDT, 40 minutes before
MOZ009-010-018-019-026-027-034-041-047-090130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 747 PM CDT THU APR 8 1999 THE FOLLOWING COUNTIES HAVE BEEN REMOVED FROM TORNADO WATCHES 135 AND 136 IN MISSOURI: SCOTLAND...CLARK...KNOX...LEWIS...SHELBY...MARION...MONROE...BOONE AND MONITEAU. THE SEVERE WEATHER THREAT HAS DIMINISHED FOR TONIGHT IN THESE COUNTIES. BRITT
Special weather statement, Apr 8, 7:47 PM CDT, 40 minutes before
MOZ009-010-018-019-026-027-034-041-047-090130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 747 PM CDT THU APR 8 1999 THE FOLLOWING COUNTIES HAVE BEEN REMOVED FROM TORNADO WATCHES 135 AND 136 IN MISSOURI: SCOTLAND...CLARK...KNOX...LEWIS...SHELBY...MARION...MONROE...BOONE AND MONITEAU. THE SEVERE WEATHER THREAT HAS DIMINISHED FOR TONIGHT IN THESE COUNTIES. BRITT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 7:08 PM CDT | Tornado Warning | LSX | Adams | 47 min |
| Apr 8, 7:38 PM CDT | Tornado Warning | LSX | Pike | 47 min |
| Apr 8, 10:17 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Montgomery | 43 min |
| Apr 8, 10:20 PM CDT | Severe Thunderstorm Warning | LSX | Fayette | 50 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.