Alert archive / Missouri / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 23, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Apr 18, 1997, 9:00 PM CDT for Boone County, Callaway County, Missouri. It was in force for 45 min. 1 report 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
- Apr 18, 1997, 9:00 PM CDT (02:00 UTC)
- Expired
- Apr 18, 1997, 9:45 PM CDT
- In force
- 45 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
Counties Boone County, MO, Callaway County, MO
The radar
The St Louis radar (KLSX), 127 km from the middle of the area, began a volume at 02:04 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 |
|---|---|---|---|
| Apr 18, 9:00 PM CDT | Hail 1.74 | Columbia, MO |
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 nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 2.0 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
- 150 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 2058 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSTL 190200 RRA SVRSTL MOC019-027-190245- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 900 PM CDT FRI APR 18 1997 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 945 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL MISSOURI ...EASTERN BOONE COUNTY...CALLAWAY COUNTY AT 858 PM...A SEVERE THUNDERSTORM WAS INDICATED ON THE NORTH SIDE OF COLUMBIA...AND GOLF BALL SIZED HAIL WAS REPORTED WITH THIS STORM. THE STORM WAS MOVING SOUTHEAST AT 35 MPH. IN ADDITION TO THE COLUMBIA AREA...THIS STORM WILL BE AFFECTING THE TOWNS BROWNS STATION...MURRY...AND FULTON. &
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 8:07 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Jefferson, Saint Louis | 38 min |
| Apr 18, 8:42 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Warren | 33 min |
| Apr 18, 8:51 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 39 min |
| Apr 18, 8:58 PM CDT | Severe Thunderstorm Warning | LSX | Marion, Pike, Ralls | 47 min |
| Apr 18, 9:45 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 45 min |
| Apr 18, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 32 min |
| Apr 18, 9:58 PM CDT | Severe Thunderstorm Warning | LSX | City of Saint Louis | 32 min |
| Apr 18, 10:07 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 38 min |
| Apr 18, 10:25 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 50 min |
| Apr 18, 10:54 PM CDT | Severe Thunderstorm Warning | LSX | Boone | 51 min |
| Apr 19, 1:11 AM CDT | Severe Thunderstorm Warning | LSX | Franklin | 34 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 1997Every severe thunderstorm warning in 1997
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.