Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 138, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 8, 2021, 2:43 PM CDT for Franklin County, Gasconade County, Missouri. It was in force for 47 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
- Aug 8, 2021, 2:43 PM CDT (19:43 UTC)
- Expired
- Aug 8, 2021, 3:30 PM CDT
- In force
- 47 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), 50 km from the middle of the area, began a volume at 19:45 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 |
|---|---|---|---|
| Aug 8, 3:18 PM CDT | TSTM WND DMG | 5 Wsw Washington, MO | SEVERAL TREES AND TREE LIMBS BLOWN DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 8, 12:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 7.7 hours before the alert went out and 289 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
- 310 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -25 m²/s²
- 0-3 km storm-relative helicity
- -3 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
060
WUUS53 KLSX 081943
SVRLSX
MOC071-073-082030-
/O.NEW.KLSX.SV.W.0138.210808T1943Z-210808T2030Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
243 PM CDT Sun Aug 8 2021
The National Weather Service in St Louis has issued a
* Severe Thunderstorm Warning for...
Franklin County in east central Missouri...
Southeastern Gasconade County in east central Missouri...
* Until 330 PM CDT.
* At 243 PM CDT, severe thunderstorms were located along a line
extending from near Rosebud to 9 miles northwest of Bourbon, moving
northeast at 35 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.
* Severe thunderstorms will be near...
Gerald around 255 PM CDT.
Other locations in the path of these severe thunderstorms include
Beaufort, Washington, St. Clair, Parkway and Union.
This includes Interstate 44 in Missouri between exits 230 and 247.
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 3858 9131 3861 9120 3860 9113 3861 9106
3860 9104 3857 9102 3854 9096 3834 9085
3821 9136 3821 9148 3837 9151
TIME...MOT...LOC 1943Z 241DEG 31KT 3838 9144 3822 9141
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Gosselin1 follow-up statement
850
WWUS53 KLSX 082006
SVSLSX
Severe Weather Statement
National Weather Service St Louis MO
306 PM CDT Sun Aug 8 2021
MOC073-082016-
/O.CAN.KLSX.SV.W.0138.000000T0000Z-210808T2030Z/
Gasconade MO-
306 PM CDT Sun Aug 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GASCONADE COUNTY
IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
east central Missouri.
LAT...LON 3858 9131 3861 9120 3860 9113 3861 9106
3860 9104 3857 9102 3854 9096 3834 9085
3821 9137 3852 9137
TIME...MOT...LOC 2006Z 241DEG 31KT 3847 9123 3831 9120
$$
MOC071-082030-
/O.CON.KLSX.SV.W.0138.000000T0000Z-210808T2030Z/
Franklin MO-
306 PM CDT Sun Aug 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CDT
FOR FRANKLIN COUNTY...
At 306 PM CDT, severe thunderstorms were located along a line
extending from near Beaufort to 6 miles north of Sullivan, moving
northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
New Haven, Washington, St. Clair, Parkway and Union.
This includes Interstate 44 in Missouri between exits 239 and 247.
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 3858 9131 3861 9120 3860 9113 3861 9106
3860 9104 3857 9102 3854 9096 3834 9085
3821 9137 3852 9137
TIME...MOT...LOC 2006Z 241DEG 31KT 3847 9123 3831 9120
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
GosselinThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:37 PM CDT | Heat Advisory | LSX | Audrain, Boone, Callaway, Cole, Crawford, Franklin and 23 more | 4 days |
| Aug 8, 3:19 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Lincoln, Saint Charles, Warren | 41 min |
| Aug 8, 3:54 PM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Saint Charles | 66 min |
| Aug 8, 4:35 PM CDT | Areal Flood Advisory | LSX | Ralls | 3 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.