Alert archive / Missouri / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 61, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 17, 1997, 10:05 PM CDT for Washington County, Missouri. It was in force for 40 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
- May 17, 1997, 10:05 PM CDT (03:05 UTC)
- Expired
- May 17, 1997, 10:45 PM CDT
- In force
- 40 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Washington County, MO
The radar
The St Louis radar (KLSX), 84 km from the middle of the area, began a volume at 03:04 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 |
|---|---|---|---|
| May 17, 10:15 PM CDT | Hail 1.75 | Mineral Pt, MO | Skywarn spotters reported golfball size hail. |
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, 3.1 hours before the alert went out and 284 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
- 1784 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 180 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
833 WUUS1 KSTL 180308 RRA SVRSTL MOC221-180345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 1005 PM CDT SAT MAY 17 1997 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL MISSOURI ...SOUTHERN WASHINGTON COUNTY AT 1005 PM...THE ST LOUIS DOPPLER RADAR INDICATED A SEVERE STORM IN THE SOUTHWEST PORTION OF WASHINGTON COUNTY. THIS STORM WAS MOVING TO THE EAST AT 25 MPH. THIS STORM WILL HIT THE CITY OF CALADONIA BY 1030 PM. THIS STORM HAS A HISTORY OF DAMAGING HAIL. STAY INSIDE AND AWAY FROM WINDOWS. SEEK SHELTER IN A STURDY BUILDING. REMEMBER SEVERE THUNDERSTORMS OFTEN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. VA/ST
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 8:21 PM CDT | Severe Thunderstorm Warning | LSX | Washington | 69 min |
| May 17, 8:48 PM CDT | Severe Thunderstorm Warning | LSX | Saint Francois | 57 min |
| May 17, 9:03 PM CDT | Severe Thunderstorm Warning | LSX | Iron | 42 min |
| May 17, 9:44 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 31 min |
| May 17, 9:49 PM CDT | Tornado Warning | LSX | Crawford | 26 min |
| May 17, 10:13 PM CDT | Severe Thunderstorm Warning | LSX | Crawford | 47 min |
| May 18, 12:15 AM CDT | Severe Thunderstorm Warning | LSX | Franklin | 45 min |
| May 18, 7:11 AM CDT | Severe Thunderstorm Warning | LSX | Knox | 49 min |
| May 18, 7:42 AM CDT | Severe Thunderstorm Warning | LSX | Clark | 48 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.