Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 154, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 24, 2020, 2:21 AM CDT for Swift County, Minnesota. It was in force for 43 min. 3 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
- Aug 24, 2020, 2:21 AM CDT (07:21 UTC)
- Expired
- Aug 24, 2020, 3:04 AM CDT
- In force
- 43 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Swift County, MN
The radar
The Minneapolis radar (KMPX), 190 km from the middle of the area, began a volume at 07:25 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 24, 2:40 AM CDT | TSTM WND GST 79 | 2 Wnw Benson, MN | MEASURED AT KBBB. |
| Aug 24, 2:50 AM CDT | TSTM WND DMG | Benson, MN | TREES OF VARIOUS SIZE AND POWER LINES DOWN. |
| Aug 24, 2:50 AM CDT | TSTM WND GST 84 | 2 Wnw Benson, MN | CORRECTS PREVIOUS TSTM WND GST REPORT FROM 2 WNW BENSON. MEASURED AT KBBB. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 7.4 hours before the alert went out and 187 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
- 669 J/kg
- Mixed-layer CIN
- -226 J/kg
- Mixed-layer LCL
- 1807 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
811
WUUS53 KMPX 240721
SVRMPX
MNC151-240815-
/O.NEW.KMPX.SV.W.0154.200824T0721Z-200824T0815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
221 AM CDT Mon Aug 24 2020
The National Weather Service in the Twin Cities has issued a
* Severe Thunderstorm Warning for...
Western Swift County in west central Minnesota...
* Until 315 AM CDT.
* At 220 AM CDT, a severe thunderstorm was located over Artichoke, or
15 miles northeast of Ortonville, moving southeast at 35 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will be near...
Lake Oliver around 235 AM CDT.
Benson around 310 AM CDT.
Other locations impacted by this severe thunderstorm include
Danvers, Hagen, Appleton Airport, Clontarf and Holloway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4527 9611 4541 9611 4541 9578 4535 9553
4515 9566 4515 9581 4524 9612
TIME...MOT...LOC 0720Z 294DEG 29KT 4540 9615
HAIL...1.50IN
WIND...60MPH
$$2 follow-up statements
210
WWUS53 KMPX 240745
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
245 AM CDT Mon Aug 24 2020
MNC151-240815-
/O.CON.KMPX.SV.W.0154.000000T0000Z-200824T0815Z/
Swift MN-
245 AM CDT Mon Aug 24 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT
FOR WESTERN SWIFT COUNTY...
At 244 AM CDT, a severe thunderstorm was located near Lake Oliver, or
18 miles south of Morris, moving southeast at 35 mph.
This is a very dangerous storm.
HAZARD...80 mph wind gusts and quarter size hail.
SOURCE...Radar indicated. At 740 AM, a 79 mph wind gust was reported
in Benson.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
This severe storm will be near...
Benson around 310 AM CDT.
Other locations impacted by this severe thunderstorm include
Danvers, Hagen, Clontarf and Holloway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4520 9599 4541 9588 4541 9578 4535 9553
4515 9566 4515 9581
TIME...MOT...LOC 0744Z 294DEG 29KT 4532 9589
HAIL...1.00IN
WIND...80MPH
$$415
WWUS53 KMPX 240804
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
304 AM CDT Mon Aug 24 2020
MNC151-240813-
/O.CAN.KMPX.SV.W.0154.000000T0000Z-200824T0815Z/
Swift MN-
304 AM CDT Mon Aug 24 2020
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN SWIFT COUNTY IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled. A severe thunderstorm
warning remains in effect until 330 am for eastern Swift county
LAT...LON 4520 9599 4541 9588 4541 9578 4535 9553
4515 9566 4515 9581
TIME...MOT...LOC 0802Z 294DEG 29KT 4526 9569
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 1:39 AM CDT | Special Weather Statement | MPX | Stevens | 66 min |
| Aug 24, 1:58 AM CDT | Severe Thunderstorm Warning | MPX | Stevens | 46 min |
| Aug 24, 2:30 AM CDT | Severe Thunderstorm Warning | MPX | Pope, Stevens, Swift | 35 min |
| Aug 24, 2:41 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Pope, Swift | 49 min |
| Aug 24, 3:13 AM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Meeker, Renville | 62 min |
| Aug 24, 3:40 AM CDT | Heat Advisory | MPX | Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 20 more | 16 hr |
| Aug 24, 3:52 AM CDT | Severe Thunderstorm Warning | MPX | McLeod, Meeker, Wright | 38 min |
| Aug 24, 5:31 AM CDT | Special Weather Statement | MPX | Swift | 44 min |
| Aug 24, 6:10 AM CDT | Special Weather Statement | MPX | Chippewa | 50 min |
| Aug 24, 6:43 AM CDT | Special Weather Statement | MPX | Renville | 47 min |
| Aug 24, 7:30 AM CDT | Special Weather Statement | MPX | Nicollet, Sibley | 60 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2020Every severe thunderstorm warning in 2020
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.