Alert archive / Missouri / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 172, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jun 27, 1999, 3:32 PM CDT for Madison County, Missouri. It was in force for 33 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 27, 1999, 3:32 PM CDT (20:32 UTC)
- Expired
- Jun 27, 1999, 4:05 PM CDT
- In force
- 33 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Madison County, MO
The radar
The St Louis radar (KLSX), 139 km from the middle of the area, began a volume at 20:34 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 27, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.5 hours before the alert went out and 313 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
- 1135 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 826 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jun 27, 10:49 AM CDT, 4 hours 43 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-272300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT SUN JUN 27 1999 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. SCATTERED SHOWERS AND THUNDERSTORMS ARE FORECAST ACROSS THE AREA THIS AFTERNOON AND TONIGHT...ALSO THUNDERSTORM ACTIVITY IS NOT EXPECTED TO BECOME SEVERE. SKYWARN ACTIVATION SHOULD NOT BE REQUIRED.
Special weather statement, Jun 27, 11:30 AM CDT, 4 hours 2 minutes before
ILZ058>060-064-065-069-070-074-079-095>102-MOZ009-010-018-019-026- 027-034>036-041-042-047>052-059>065-072>075-084-085-099-272300- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 1130 AM CDT SUN JUN 27 1999 THIS OUTLOOK COVERS THE COUNTY WARNING AREA OF THE NWS OFFICE IN ST. LOUIS. AREAS INCLUDED ARE PARTS OF CENTRAL...NORTHEAST AND EAST CENTRAL MISSOURI...AND SOUTHWEST ILLINOIS. SCATTERED SHOWERS AND THUNDERSTORMS ARE FORECAST ACROSS THE AREA THIS AFTERNOON AND TONIGHT...ALSO THUNDERSTORM ACTIVITY IS NOT EXPECTED TO BECOME SEVERE. SKYWARN ACTIVATION SHOULD NOT BE REQUIRED.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 1:09 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 46 min |
| Jun 27, 1:34 PM CDT | Severe Thunderstorm Warning | LSX | Franklin | 46 min |
| Jun 27, 1:58 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Reynolds, Washington | 47 min |
| Jun 27, 2:40 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 45 min |
| Jun 27, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison | 31 min |
| Jun 27, 2:54 PM CDT | Severe Thunderstorm Warning | LSX | Reynolds | 31 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1999Every severe thunderstorm warning 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.