A strong low pressure system tracked from Nebraska northward into eastern South Dakota during the morning and afternoon on Memorial Day (May 30, 2022). An intense line of severe thunderstorms developed across eastern South Dakota in response, and then tracked northeast into western Minnesota. In addition to damaging straight-line winds and large hail, several fast-moving and/or rain-wrapped tornadoes were produced. The strongest tornado was rated an EF3 in Deuel County with an estimated peak wind speed of 140 mph after it destroyed a transmission tower. Additionally, heavy rains fell on already saturated soils across northeastern South Dakota and west central Minnesota.

Significant property and tree damage, power outages, river and overland flooding including across many county and secondary roads, and other impacts resulted across the same area that was hit hard by a derecho and tornadoes just two and a half weeks earlier on May 12th.

Seven tornado tracks have been confirmed, however the damage investigation continues. Information remains preliminary and subject to change.

Photos and summary information can be seen below or found at https://www.weather.gov/abr/ReviewMay302022.

Preliminary Tornadoes:

Tornado #1 – From 5 miles south of Goodwin to 1 mile north of Tunerville, SD
Deuel County

Date 5/30/2022
Time (Local) 2:46pm – 2:58pm
EF Rating EF3
Est. Peak Winds 140 mph
Path Length 10.15 miles
Max Width 100 yards
Injuries/Deaths 0/0
Summary: A grain bin was ripped from the base and tossed a mile to the northeast, a farmstead lost several outbuildings and sustained damage to the home, and a transmission tower was completely twisted and collapsed.

Tornado #2 – From 8 miles NNE of Estelline to 2 miles SSE of Altamont, SD
Deuel County

Date 5/30/2022
Time (Local) 2:41pm – 2:53pm
EF Rating EF2
Est. Peak Winds 115
Path Length 11.9 miles
Max Width 150 yards
Injuries/Deaths 0/0
Summary: A farmstead had one destroyed and one partially destroyed stave silo, a severely damaged barn, and a grain bin that was tossed a quarter mile to the northeast. At least 4 other farmsteads were damaged along the tornado’s path.

Tornado #3– 3 miles WNW of Clear Lake, SD
Deuel County

Date 5/30/2022
Time (Local) 2:50pm – 2:50pm
EF Rating EF1
Est. Peak Winds 90 mph
Path Length 0.43 miles
Max Width 20 yards
Injuries/Deaths 0/0
Summary: A clear path was observed through a tree grove, and farm machinery was tossed.

Tornado #4 – From 4 miles SSW of La Bolt to 4 miles NNW of Albee, SD
Grant County

Date 5/30/2022
Time (Local) 3:05pm – 3:10pm
EF Rating EF1
Est. Peak Winds 100 mph
Path Length 10.31 miles
Max Width 40 yards
Injuries/Deaths 0/0
Summary: A farmstead had a roof ripped off a barn, damage to a machine shed, a destroyed stave silo, and a dented grain bin; the home had debris pierced through walls, roof panels ripped off, and broken windows. Another residence had half a barn roof ripped off and tossed a quarter mile to the northeast. Power poles were snapped at the base.

 

Tornado #5 – 4 miles ENE of of Stone Bridge, SD
Hamlin County

Date 5/30/2022
Time (Local) 2:30pm – 2:30pm
EF Rating EF0
Est. Peak Winds 85 mph
Path Length 0.65 miles
Max Width 10 yards
Injuries/Deaths 0/0
Summary: An eyewitness saw a brief tornado touchdown. Only minor damage to a cattle shed was noted.

Track Map

Track MapEF-Scale

 

Photo
Radar reflectivity (left) and storm-relative velocity (right) at 2:30pm

 

Tornado #6 – 4 miles south of Artichoke, MN 
Big Stone County

Date 5/30/2022
Time (Local) 3:36pm – 3:38pm
EF Rating EF1
Est. Peak Winds 90 mph
Path Length 2.41 miles
Max Width 30 yards
Injuries/Deaths 0/0
Summary: A storm chaser documented the brief tornado touchdown. Two farmsteads were damaged.

Track Map

Track MapEF-Scale

 

Photo
Radar reflectivity (left) and storm-relative velocity (right) at 3:38pm

 

Tornado #7 – From 4 miles north of Albee to 5 miles SE of Milbank, SD
Grant County

Date 5/30/2022
Time (Local) 3:10pm – 3:14pm
EF Rating EF1
Est. Peak Winds 100 mph
Path Length 4.45 miles
Max Width 20 yards
Injuries/Deaths 0/0
Summary: The tornado mangled trees, snapped and uprooted trees, damaged a dairy barn, and tore off a quarter of the roof of a house.

Track Map

Track MapEF-Scale

 

Photo
Radar reflectivity (left) and storm-relative velocity (right) at 3:12pm

 

 

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0
Weak

65-85 mph
EF1
Moderate
86-110 mph
EF2
Significant
111-135 mph
EF3
Severe
136-165 mph
EF4
Extreme
166-200 mph
EF5
Catastrophic
200+ mph
ef-scale



Source link

By admin

Leave a Reply

Your email address will not be published.