Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 99, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Aug 12, 2021, 5:31 AM CDT for Harrison County, Mercer County, Missouri. It was in force for 29 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, 5:31 AM CDT (10:31 UTC)
- Expired
- Aug 12, 2021, 6:00 AM CDT
- In force
- 29 min
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Harrison County, MO, Mercer County, MO
The radar
The Des Moines radar (KDMX), 142 km from the middle of the area, began a volume at 10:32 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 nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 10.5 hours before the alert went out and 228 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
- 3590 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1870 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 11.4
The text
As transmitted.
066 WUUS53 KEAX 121031 SVREAX MOC081-129-121100- /O.NEW.KEAX.SV.W.0099.210812T1031Z-210812T1100Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Kansas City/Pleasant Hill MO 531 AM CDT Thu Aug 12 2021 The National Weather Service in Pleasant Hill has issued a * Severe Thunderstorm Warning for... Northwestern Mercer County in north central Missouri... Northeastern Harrison County in north central Missouri... * Until 600 AM CDT. * At 531 AM CDT, a severe thunderstorm was located over Cainsville, or 17 miles northeast of Bethany, moving east at 25 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. * Locations impacted include... Princeton and Cainsville. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4040 9388 4051 9387 4057 9358 4037 9358 TIME...MOT...LOC 1031Z 271DEG 23KT 4046 9382 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...1.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...<50 MPH $$ Grana
1 follow-up statement
048
WWUS53 KEAX 121055
SVSEAX
Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
555 AM CDT Thu Aug 12 2021
MOC081-129-121105-
/O.EXP.KEAX.SV.W.0099.000000T0000Z-210812T1100Z/
Mercer MO-Harrison MO-
555 AM CDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MERCER AND
NORTHEASTERN HARRISON COUNTIES WILL EXPIRE AT 600 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4040 9388 4051 9387 4057 9358 4037 9358
TIME...MOT...LOC 1055Z 271DEG 23KT 4046 9363
$$
GranaThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 4:29 AM CDT | Special Weather Statement | EAX | Harrison | 31 min |
| Aug 12, 4:58 AM CDT | Special Weather Statement | EAX | Mercer | 47 min |
| Aug 12, 6:00 AM CDT | Special Weather Statement | EAX | Mercer | 30 min |
| Aug 12, 8:37 AM CDT | Special Weather Statement | EAX | Schuyler | 8 min |
| Aug 12, 8:38 AM CDT | Special Weather Statement | EAX | Schuyler | 37 min |
| Aug 12, 1:27 PM CDT | Flash Flood Watch | EAX | Putnam, Schuyler | 6 hr |
| Aug 12, 1:42 PM CDT | Special Weather Statement | EAX | Daviess, Grundy, Sullivan | 48 min |
| Aug 12, 1:45 PM CDT | Special Weather Statement | EAX | Schuyler | 30 min |
| Aug 12, 2:15 PM CDT | Flash Flood Warning | EAX | Putnam, Schuyler | 2 hr |
| Aug 12, 2:16 PM CDT | Special Weather Statement | EAX | Caldwell, Linn, Livingston | 29 min |
| Aug 12, 2:18 PM CDT | Severe Thunderstorm Warning | EAX | Grundy, Linn, Livingston | 27 min |
| Aug 12, 2:31 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Carroll, Daviess, Linn, Livingston | 29 min |
| Aug 12, 2:49 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Chariton, Livingston | 26 min |
| Aug 12, 3:13 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Chariton, Livingston, Saline | 32 min |
| Aug 12, 3:28 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Platte | 32 min |
| Aug 12, 3:44 PM CDT | Severe Thunderstorm Warning | EAX | Chariton, Macon, Randolph | 31 min |
| Aug 12, 3:53 PM CDT | Severe Thunderstorm Warning | EAX | Randolph | 37 min |
| Aug 12, 3:56 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Jackson, Platte | 34 min |
| Aug 12, 4:09 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Jackson, Lafayette, Ray, Saline | 36 min |
| Aug 12, 4:42 PM CDT | Severe Thunderstorm Warning | EAX | Jackson, Johnson, Lafayette | 33 min |
| Aug 12, 5:11 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson, Johnson, Lafayette | 34 min |
| Aug 12, 5:18 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson | 27 min |
| Aug 12, 5:22 PM CDT | Severe Thunderstorm Warning | EAX | Jackson | 8 min |
| Aug 12, 5:37 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson, Johnson | 8 min |
| Aug 12, 5:43 PM CDT | Severe Thunderstorm Warning | EAX | Cass, Jackson, Johnson | 32 min |
| Aug 12, 6:15 PM CDT | Special Weather Statement | EAX | Cass | 45 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.