Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 3, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 17, 2021, 7:52 AM CDT for Boone County, Moniteau County, Missouri. It was in force for 38 min. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 17, 2021, 7:52 AM CDT (12:52 UTC)
- Expired
- Mar 17, 2021, 8:30 AM CDT
- In force
- 38 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Boone County, MO, Moniteau County, MO
The radar
The Pleasant Hill radar (KEAX), 154 km from the middle of the area, began a volume at 12:54 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 |
|---|---|---|---|
| Mar 17, 7:53 AM CDT | HAIL 0.25 | 4 Wsw Columbia, MO | |
| Mar 17, 8:02 AM CDT | HAIL 0.7 | 4 Wsw Columbia, MO | DIME SIZED HAIL COVERING THE GROUND. |
| Mar 17, 8:05 AM CDT | HAIL 1 | Kliever, MO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 0.9 hours before the alert went out and 237 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
- 102 J/kg
- Mixed-layer CIN
- -235 J/kg
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 236 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
The text
As transmitted.
683
WUUS53 KLSX 171252
SVRLSX
MOC019-135-171330-
/O.NEW.KLSX.SV.W.0003.210317T1252Z-210317T1330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
752 AM CDT Wed Mar 17 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Central Boone County in central Missouri...
Moniteau County in central Missouri...
* Until 830 AM CDT.
* At 751 AM CDT, a severe thunderstorm was located over California,
moving northeast at 40 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Columbia, California, Jamestown, Clarksburg, Rocheport, Easley,
McGirk, Midway, Harrisburg, Lupus, McBaine, Sandy Hook, Wilton and
Kliever.
This includes Interstate 70 in Missouri between exits 115 and 133.
This also includes Rock Bridge State Park and Jewell Cemetery
Historic Site.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in St Louis.
&&
LAT...LON 3868 9271 3868 9262 3892 9250 3898 9257
3915 9248 3898 9214 3879 9225 3872 9235
3874 9239 3853 9246 3848 9249 3864 9273
TIME...MOT...LOC 1251Z 217DEG 37KT 3862 9260
HAIL...1.00IN
WIND...<50MPH
$$
Gosselin3 follow-up statements
049
WWUS53 KLSX 171306
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
806 AM CDT Wed Mar 17 2021
MOC019-135-171330-
/O.CON.KLSX.SV.W.0003.000000T0000Z-210317T1330Z/
Boone MO-Moniteau MO-
806 AM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR CENTRAL BOONE AND NORTHEASTERN MONITEAU COUNTIES...
At 806 AM CDT, a severe thunderstorm was located over Jamestown,
moving northeast at 45 mph.
HAZARD...Quarter size hail.
SOURCE...Trained weather spotters quarter sized hail in Kliever.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Columbia, Jamestown, Rocheport, Easley, Midway, Harrisburg, Lupus,
McBaine, Kliever, Sandy Hook and Wilton.
This also includes Rock Bridge State Park and Jewell Cemetery
Historic Site.
This includes Interstate 70 in Missouri between exits 115 and 133.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
St Louis.
&&
LAT...LON 3878 9257 3892 9250 3898 9257 3915 9248
3898 9214 3879 9225 3872 9235 3874 9239
3868 9241 3864 9243 3868 9253 3873 9260
TIME...MOT...LOC 1306Z 217DEG 37KT 3875 9248
HAIL...1.00IN
WIND...<50MPH
$$
Gosselin400
WWUS53 KLSX 171318
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
818 AM CDT Wed Mar 17 2021
MOC135-171327-
/O.CAN.KLSX.SV.W.0003.000000T0000Z-210317T1330Z/
Moniteau MO-
818 AM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MONITEAU COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3899 9256 3915 9248 3898 9214 3879 9225
3872 9235 3874 9240 3876 9241 3877 9241
3879 9238 3881 9238 3883 9244 3886 9245
3888 9248 3891 9248 3898 9257
TIME...MOT...LOC 1317Z 217DEG 39KT 3885 9237
$$
MOC019-171330-
/O.CON.KLSX.SV.W.0003.000000T0000Z-210317T1330Z/
Boone MO-
818 AM CDT Wed Mar 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 AM CDT
FOR CENTRAL BOONE COUNTY...
At 817 AM CDT, a severe thunderstorm was located near Easley, moving
northeast at 45 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Columbia, Rocheport, Midway, Harrisburg, McBaine and Wilton.
This also includes Rock Bridge State Park and Jewell Cemetery
Historic Site.
This includes Interstate 70 in Missouri between exits 115 and 133.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
St Louis.
&&
LAT...LON 3899 9256 3915 9248 3898 9214 3879 9225
3872 9235 3874 9240 3876 9241 3877 9241
3879 9238 3881 9238 3883 9244 3886 9245
3888 9248 3891 9248 3898 9257
TIME...MOT...LOC 1317Z 217DEG 39KT 3885 9237
HAIL...1.00IN
WIND...<50MPH
$$
Gosselin502
WWUS53 KLSX 171328
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
828 AM CDT Wed Mar 17 2021
MOC019-171337-
/O.EXP.KLSX.SV.W.0003.000000T0000Z-210317T1330Z/
Boone MO-
828 AM CDT Wed Mar 17 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BOONE COUNTY WILL
EXPIRE AT 830 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
is still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
St Louis.
LAT...LON 3899 9256 3915 9248 3898 9214 3879 9225
3872 9235 3874 9240 3876 9241 3877 9241
3879 9238 3881 9238 3883 9244 3886 9245
3888 9248 3891 9248 3898 9257
TIME...MOT...LOC 1327Z 217DEG 37KT 3887 9236
$$
GosselinThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 2:49 AM CDT | Flash Flood Watch | LSX | Crawford, Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois and 1 more | 22 hr |
| Mar 17, 9:39 AM CDT | Areal Flood Advisory | LSX | Audrain, Boone | 3 hr |
| Mar 17, 11:14 AM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 4 days |
| Mar 17, 11:14 AM CDT | River Flood Warning | LSX | Callaway, Osage | 21 days |
| Mar 17, 11:14 AM CDT | River Flood Warning | LSX | Franklin, Warren | 21 days |
| Mar 17, 11:14 AM CDT | River Flood Warning | LSX | Saint Charles, Saint Louis | 4 days |
| Mar 17, 11:14 AM CDT | River Flood Warning | LSX | Boone, Callaway, Cole, Moniteau | 71 hr |
| Mar 17, 11:35 AM CDT | River Flood Warning | LSX | Boone | 10 hr |
| Mar 17, 12:05 PM CDT | River Flood Warning | LSX | Marion | 69 hr |
| Mar 17, 12:05 PM CDT | River Flood Warning | LSX | Marion | 42 hr |
| Mar 17, 12:05 PM CDT | River Flood Warning | LSX | Monroe | 3 days |
| Mar 17, 12:05 PM CDT | River Flood Warning | LSX | Lewis | 42 hr |
| Mar 17, 12:05 PM CDT | River Flood Warning | LSX | Lewis | 38 hr |
Nearby
Severe Thunderstorm Warnings in Missouri, 2021Every severe thunderstorm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.