Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 116, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Aug 12, 2021, 8:53 PM CDT for 4 counties in 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
- Aug 12, 2021, 8:53 PM CDT (01:53 UTC)
- Expired
- Aug 12, 2021, 9:08 PM CDT
- In force
- 15 min
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Jackson County, MO, Johnson County, MO, Lafayette County, MO, Ray County, MO
The radar
The Pleasant Hill radar (KEAX), 43 km from the middle of the area, began a volume at 01:53 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 |
|---|---|---|---|
| Aug 12, 5:19 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 1.9 hours before the alert went out and 147 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
- 4214 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 1420 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 179 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.4
The text
As transmitted.
690
WUUS53 KEAX 130153
SVREAX
MOC095-101-107-177-130230-
/O.NEW.KEAX.SV.W.0116.210813T0153Z-210813T0230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
853 PM CDT Thu Aug 12 2021
The National Weather Service in Pleasant Hill has issued a
* Severe Thunderstorm Warning for...
Southeastern Ray County in west central Missouri...
Lafayette County in west central Missouri...
Northeastern Jackson County in west central Missouri...
North central Johnson County in west central Missouri...
* Until 930 PM CDT.
* At 852 PM CDT, a severe thunderstorm was located near Grain Valley,
moving east at 40 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* Locations impacted include...
Independence, Lee's Summit, Blue Springs, Grain Valley, Oak Grove,
Odessa, Higginsville, Lexington, Buckner, Lake Lotawana,
Wellington, Lake Tapawingo, Sibley, Mayview, Levasy, Lake
Lafayette, Napoleon, Bates City, Dover and Aullville.
This includes Interstate 70 in Missouri between mile markers 18 and
52.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3895 9435 3916 9429 3921 9376 3921 9371
3922 9369 3922 9367 3887 9368
TIME...MOT...LOC 0152Z 279DEG 33KT 3904 9413
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
HB1 follow-up statement
903
WWUS53 KEAX 130208
SVSEAX
Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
908 PM CDT Thu Aug 12 2021
MOC095-101-107-177-130218-
/O.CAN.KEAX.SV.W.0116.000000T0000Z-210813T0230Z/
Ray MO-Lafayette MO-Jackson MO-Johnson MO-
908 PM CDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RAY...
LAFAYETTE...NORTHEASTERN JACKSON AND NORTH CENTRAL JOHNSON COUNTIES
IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
LAT...LON 3895 9435 3916 9429 3921 9376 3921 9371
3922 9369 3922 9367 3887 9368
TIME...MOT...LOC 0207Z 279DEG 33KT 3902 9394
$$
HBThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 8:01 PM CDT | Special Weather Statement | EAX | Jackson | 29 min |
| Aug 12, 8:16 PM CDT | Severe Thunderstorm Warning | EAX | Jackson | 29 min |
| Aug 12, 8:45 PM CDT | Special Weather Statement | EAX | Jackson | 30 min |
| Aug 12, 9:06 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 24 min |
| Aug 12, 9:29 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 31 min |
| Aug 12, 9:52 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 23 min |
| Aug 12, 11:39 PM CDT | River Flood Warning | EAX | Jackson | 8 hr |
| Aug 12, 11:39 PM CDT | River Flood Warning | EAX | Jackson | 18 hr |
| Aug 12, 11:52 PM CDT | Special Weather Statement | EAX | Bates | 23 min |
| Aug 12, 11:57 PM CDT | Severe Thunderstorm Warning | EAX | Bates | 33 min |
| Aug 13, 5:49 AM CDT | Areal Flood Warning | EAX | Bates, Cass, Henry | 12 hr |
| Aug 13, 9:59 AM CDT | River Flood Warning | EAX | Bates, Cass, Henry | 12 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.