Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 27, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Jun 11, 2021, 3:37 PM CDT for 5 counties in Missouri. It was in force for 38 min. 5 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
- Jun 11, 2021, 3:37 PM CDT (20:37 UTC)
- Expired
- Jun 11, 2021, 4:15 PM CDT
- In force
- 38 min
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 70.0 mph
Counties Cass County, MO, Clay County, MO, Jackson County, MO, Lafayette County, MO, Ray County, MO
The radar
The Pleasant Hill radar (KEAX), 26 km from the middle of the area, began a volume at 20:42 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 |
|---|---|---|---|
| Jun 11, 3:49 PM CDT | TSTM WND GST 70 | Independence, MO | DELAYED REPORT. ESTIMATED 65 TO 70 MPH WINDS IN INDEPENDENCE. |
| Jun 11, 3:58 PM CDT | TSTM WND DMG | Grain Valley, MO | DELAYED REPORT. TEN INCH TREE LIMBS DOWN IN GRAIN VALLEY. |
| Jun 11, 4:00 PM CDT | TSTM WND GST 75 | Lee'S Summit, MO | SMALL TREE DEBRIS ON GROUND. |
| Jun 11, 4:05 PM CDT | TSTM WND GST 65 | Independence, MO | SOCIAL MEDIA REPORT, NO MAJOR DAMAGE, SPORADIC POWER OUTAGES. |
| Jun 11, 4:10 PM CDT | TSTM WND GST 60 | 2 W Raymore, MO |
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 |
|---|---|---|---|
| Jun 11, 12:32 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 8.6 hours before the alert went out and 122 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
- 2135 J/kg
- Mixed-layer CIN
- -160 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -1.2
The text
As transmitted.
672
WUUS53 KEAX 112037
SVREAX
MOC037-047-095-107-177-112115-
/O.NEW.KEAX.SV.W.0027.210611T2037Z-210611T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
337 PM CDT Fri Jun 11 2021
The National Weather Service in Pleasant Hill has issued a
* Severe Thunderstorm Warning for...
North central Cass County in west central Missouri...
Southeastern Clay County in west central Missouri...
Southwestern Ray County in west central Missouri...
Southwestern Lafayette County in west central Missouri...
Jackson County in west central Missouri...
* Until 415 PM CDT.
* At 337 PM CDT, severe thunderstorms were located along a line
extending from near Crystal Lakes to near Sibley to near Sugar
Creek, moving south at 50 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
* Severe thunderstorms will be near...
Independence, Lee's Summit, Raytown, Buckner, Lake Tapawingo and
Levasy around 345 PM CDT.
Blue Springs around 350 PM CDT.
Grain Valley, Lake Lotawana and Henrietta around 355 PM CDT.
Other locations in the path of these severe thunderstorms include
Raymore, Greenwood, Lake Winnebago, Wellington, Pleasant Hill, Lone
Jack and Odessa.
This includes the following highways...
Interstate 70 in Missouri between mile markers 8 and 36.
Interstate 470 between mile markers 0 and 16.
Interstate 435 near mile marker 62, and between mile markers 64 and
73.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3884 9461 3888 9461 3924 9437 3921 9416
3938 9405 3932 9392 3908 9393 3892 9405
3891 9411 3881 9413
TIME...MOT...LOC 2037Z 350DEG 42KT 3941 9411 3922 9423 3910 9440
HAIL...1.00IN
WIND...70MPH
$$
PPThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 12:04 PM CDT | Special Weather Statement | EAX | Atchison | 41 min |
| Jun 11, 12:10 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Holt | 21 min |
| Jun 11, 1:16 PM CDT | Severe Thunderstorm Warning | EAX | Holt | 29 min |
| Jun 11, 1:41 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Buchanan, Holt | 34 min |
| Jun 11, 2:12 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Buchanan, DeKalb, Holt, Platte | 63 min |
| Jun 11, 2:44 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Buchanan, Clay, Clinton, DeKalb, Platte | 46 min |
| Jun 11, 2:49 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Lafayette, Ray | 41 min |
| Jun 11, 2:52 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Clinton, Jackson, Platte | 68 min |
| Jun 11, 3:26 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Clay, Clinton, Jackson, Ray | 34 min |
| Jun 11, 3:28 PM CDT | Special Weather Statement | EAX | Lafayette | 47 min |
| Jun 11, 3:57 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Clinton, Jackson, Ray | 14 min |
| Jun 11, 3:59 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Clay, Jackson | 31 min |
| Jun 11, 4:02 PM CDT | Areal Flood Advisory | EAX | Platte | 4 hr |
| Jun 11, 4:07 PM CDT | Special Weather Statement | EAX | Pettis | 38 min |
| Jun 11, 4:14 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Clay, Jackson, Johnson, Lafayette, Ray | 46 min |
| Jun 11, 4:25 PM CDT | Severe Thunderstorm Warning | EAX | Johnson, Lafayette, Pettis, Saline | 35 min |
| Jun 11, 4:42 PM CDT | Severe Thunderstorm Warning | EAX | Bates, Cass, Henry, Johnson, Pettis | 33 min |
| Jun 11, 5:08 PM CDT | Severe Thunderstorm Warning | EAX | Henry, Johnson, Lafayette, Pettis, Saline | 37 min |
| Jun 11, 5:58 PM CDT | River Flood Warning | EAX | Jackson | 81 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.