Alert archive / Missouri / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 97, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Aug 7, 2021, 11:16 PM CDT for Atchison County, Holt County, Missouri. It was in force for 44 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 7, 2021, 11:16 PM CDT (04:16 UTC)
- Expired
- Aug 8, 2021, 12:00 AM CDT
- In force
- 44 min
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Atchison County, MO, Holt County, MO
The radar
The Omaha radar (KOAX), 122 km from the middle of the area, began a volume at 04:17 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 7, 11:16 PM CDT | TSTM WND DMG | 3 Ssw Rockport, MO | DELAYED REPORT... HIGHWAY SIGN BLOWN OVER AT MM 108 ALONG I-29. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 4.3 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
- 2933 J/kg
- Mixed-layer CIN
- -124 J/kg
- Mixed-layer LCL
- 1327 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.3
The text
As transmitted.
645
WUUS53 KEAX 080416
SVREAX
MOC005-087-080500-
/O.NEW.KEAX.SV.W.0097.210808T0416Z-210808T0500Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Kansas City/Pleasant Hill MO
1116 PM CDT Sat Aug 7 2021
The National Weather Service in Pleasant Hill has issued a
* Severe Thunderstorm Warning for...
Atchison County in northwestern Missouri...
Northwestern Holt County in northwestern Missouri...
* Until midnight CDT.
* At 1115 PM CDT, a severe thunderstorm was located near Peru, or 14
miles west of Tarkio, moving northeast at 55 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...
Tarkio, Rock Port, Fairfax, Westboro, Watson, Blanchard, Corning,
Indian Cave State Park and Phelps City.
This includes Interstate 29 between mile markers 94 and 123.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4058 9520 4048 9520 4048 9518 4024 9518
4019 9548 4024 9547 4026 9555 4030 9556
4031 9566 4034 9562 4041 9566 4046 9564
4046 9568 4048 9570 4055 9566 4056 9568
4052 9571 4052 9575 4058 9577
TIME...MOT...LOC 0415Z 240DEG 49KT 4041 9566
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Blair2 follow-up statements
701
WWUS53 KEAX 080441
SVSEAX
Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1141 PM CDT Sat Aug 7 2021
MOC005-087-080500-
/O.CON.KEAX.SV.W.0097.000000T0000Z-210808T0500Z/
Atchison MO-Holt MO-
1141 PM CDT Sat Aug 7 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT
FOR ATCHISON AND NORTHWESTERN HOLT COUNTIES...
At 1140 PM CDT, a severe thunderstorm was located over Fairfax, or
near Tarkio, moving east at 45 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Tarkio, Fairfax, Westboro, Blanchard and Corning.
This includes Interstate 29 between mile markers 94 and 101.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4058 9520 4048 9520 4048 9518 4024 9518
4019 9548 4024 9547 4024 9548 4058 9551
TIME...MOT...LOC 0440Z 257DEG 38KT 4035 9536
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Blair505
WWUS53 KEAX 080455
SVSEAX
Severe Weather Statement
National Weather Service Kansas City/Pleasant Hill MO
1155 PM CDT Sat Aug 7 2021
MOC005-087-080504-
/O.EXP.KEAX.SV.W.0097.000000T0000Z-210808T0500Z/
Atchison MO-Holt MO-
1155 PM CDT Sat Aug 7 2021
...THE SEVERE THUNDERSTORM WARNING FOR ATCHISON AND NORTHWESTERN HOLT
COUNTIES WILL EXPIRE AT MIDNIGHT 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. However gusty
winds are still possible with this thunderstorm.
LAT...LON 4058 9520 4048 9520 4048 9518 4024 9518
4019 9548 4024 9547 4024 9548 4058 9551
TIME...MOT...LOC 0454Z 240DEG 49KT 4043 9517
$$
BlairThe office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 10:59 PM CDT | Special Weather Statement | EAX | Atchison | 31 min |
| Aug 7, 11:55 PM CDT | Special Weather Statement | EAX | Holt, Nodaway | 35 min |
| Aug 8, 2:41 PM CDT | Heat Advisory | EAX | Adair, Andrew, Atchison, Bates, Buchanan, Caldwell and 31 more | 4 days |
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.