Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 42, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 16, 2021, 4:49 PM CDT for Boone County, Callaway County, Missouri. It was in force for 41 min. 1 report 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
- May 16, 2021, 4:49 PM CDT (21:49 UTC)
- Expired
- May 16, 2021, 5:30 PM CDT
- In force
- 41 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, MO, Callaway County, MO
The radar
The St Louis radar (KLSX), 126 km from the middle of the area, began a volume at 21:50 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 16, 5:00 PM CDT | HAIL 0.25 | Ashland, MO | VIA TWITTER. |
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, 9.8 hours before the alert went out and 257 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
- 122 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1041 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
080
WUUS53 KLSX 162149
SVRLSX
MOC019-027-162230-
/O.NEW.KLSX.SV.W.0042.210516T2149Z-210516T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
449 PM CDT Sun May 16 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Southeastern Boone County in central Missouri...
Central Callaway County in central Missouri...
* Until 530 PM CDT.
* At 448 PM CDT, a severe thunderstorm was located over Ashland,
moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Columbia Regional Airport around 455 PM CDT.
Other locations in the path of this severe thunderstorm include New
Bloomfield and Fulton.
This includes Interstate 70 in Missouri between exits 144 and 148.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3900 9190 3875 9179 3866 9228 3867 9229
3867 9233 3883 9239
TIME...MOT...LOC 2148Z 251DEG 20KT 3877 9227
HAIL...1.00IN
WIND...60MPH
$$
192 follow-up statements
021
WWUS53 KLSX 162204
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
504 PM CDT Sun May 16 2021
MOC019-027-162230-
/O.CON.KLSX.SV.W.0042.000000T0000Z-210516T2230Z/
Boone MO-Callaway MO-
504 PM CDT Sun May 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM CDT
FOR SOUTHEASTERN BOONE AND CENTRAL CALLAWAY COUNTIES...
At 503 PM CDT, a severe thunderstorm was located near Columbia
Regional Airport, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
New Bloomfield and Fulton.
This includes Interstate 70 in Missouri near exit 148.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3900 9190 3875 9179 3869 9224 3871 9229
3875 9231 3882 9230
TIME...MOT...LOC 2203Z 255DEG 17KT 3877 9220
HAIL...1.00IN
WIND...60MPH
$$
Carney883
WWUS53 KLSX 162220
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
520 PM CDT Sun May 16 2021
MOC019-027-162230-
/O.EXP.KLSX.SV.W.0042.000000T0000Z-210516T2230Z/
Boone MO-Callaway MO-
520 PM CDT Sun May 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BOONE AND CENTRAL
CALLAWAY COUNTIES WILL EXPIRE AT 530 PM 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, gusty winds and heavy rain are still possible with this
thunderstorm.
LAT...LON 3900 9190 3875 9179 3869 9224 3871 9229
3875 9231 3882 9230
TIME...MOT...LOC 2220Z 251DEG 20KT 3880 9209
$$
CarneyThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 4:04 PM CDT | Severe Thunderstorm Warning | LSX | Moniteau | 41 min |
| May 16, 6:00 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Osage | 45 min |
| May 16, 6:43 PM CDT | Severe Thunderstorm Warning | LSX | Callaway, Gasconade, Montgomery, Osage | 23 min |
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.