Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 12, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 27, 2021, 5:24 PM CDT for Franklin County, Gasconade County, Missouri. It was in force for 15 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2021, 5:24 PM CDT (22:24 UTC)
- Expired
- Mar 27, 2021, 5:39 PM CDT
- In force
- 15 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, MO, Gasconade County, MO
The radar
The St Louis radar (KLSX), 44 km from the middle of the area, began a volume at 22:25 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 |
|---|---|---|---|
| Mar 27, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 10.4 hours before the alert went out and 283 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1078 m above ground
- 0-6 km bulk shear
- 78 kt
- 0-1 km storm-relative helicity
- 369 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
099
WUUS53 KLSX 272224
SVRLSX
MOC071-073-272330-
/O.NEW.KLSX.SV.W.0012.210327T2224Z-210327T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
524 PM CDT Sat Mar 27 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Franklin County in east central Missouri...
Gasconade County in east central Missouri...
* Until 630 PM CDT.
* At 523 PM CDT, a severe thunderstorm was located near Bland, moving
east at 45 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...
Washington, Union, Pacific, St. Clair, Owensville, New Haven, Gray
Summit, Villa Ridge, Gerald, Bland, Parkway, Rosebud, Swiss, Mount
Sterling, Beaufort, Lonedell, Drake, Leslie, Canaan and
Robertsville.
This includes Interstate 44 in Missouri between exits 239 and 257.
This also includes Robertsville State Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3855 9164 3863 9123 3860 9113 3861 9105
3856 9100 3853 9091 3859 9078 3863 9073
3831 9076 3823 9164
TIME...MOT...LOC 2223Z 254DEG 37KT 3835 9163
HAIL...1.00IN
WIND...60MPH
$$
CVKING2 follow-up statements
104
WWUS53 KLSX 272232
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
532 PM CDT Sat Mar 27 2021
MOC071-073-272330-
/O.CON.KLSX.SV.W.0012.000000T0000Z-210327T2330Z/
Franklin MO-Gasconade MO-
532 PM CDT Sat Mar 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR CENTRAL FRANKLIN AND CENTRAL GASCONADE COUNTIES...
At 532 PM CDT, severe thunderstorms were located along a line
extending from near Swiss to near Owensville, moving northeast at 65
mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Washington, Union, Pacific, St. Clair, Owensville, New Haven, Gray
Summit, Villa Ridge, Gerald, Rosebud, Beaufort, Swiss, Drake, Leslie,
Noser Mill, Lyon, Robertsville, Catawissa and Moselle.
This also includes Robertsville State Park.
This includes Interstate 44 in Missouri between exits 242 and 257.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3857 9153 3863 9123 3860 9113 3861 9105
3856 9100 3853 9091 3859 9078 3863 9073
3838 9076 3832 9162
TIME...MOT...LOC 2232Z 244DEG 56KT 3853 9142 3837 9153
HAIL...1.00IN
WIND...60MPH
$$
CVKING647
WWUS53 KLSX 272239
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
539 PM CDT Sat Mar 27 2021
MOC071-073-272249-
/O.CAN.KLSX.SV.W.0012.000000T0000Z-210327T2330Z/
Franklin MO-Gasconade MO-
539 PM CDT Sat Mar 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL FRANKLIN AND CENTRAL
GASCONADE COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
east central Missouri.
LAT...LON 3857 9153 3863 9123 3860 9113 3861 9105
3856 9100 3853 9091 3859 9078 3863 9073
3838 9076 3832 9162
TIME...MOT...LOC 2237Z 254DEG 37KT 3854 9135 3838 9146
$$
CVKINGThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 4:16 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Saint Charles, Warren | 44 min |
| Mar 27, 4:23 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Pike | 52 min |
| Mar 27, 4:52 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 38 min |
| Mar 27, 5:26 PM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis, City of Saint Louis | 38 min |
| Mar 27, 5:36 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Washington | 28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.