Alert archive / Minnesota / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 84, NWS Sioux Falls, SD

May 12, 20228 counties in Minnesota; Brookings County, Moody County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 12, 2022, 5:42 PM CDT for 8 counties in Minnesota; Brookings County, Moody County, South Dakota. It was in force for 33 min. 4 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: May 12, 2022, 5:42 PM CDT (22:42 UTC)
Expired: May 12, 2022, 6:15 PM CDT
In force: 33 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Damage threat: Destructive
Hail: 0.75 in
Wind: 80.0 mph

Counties Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Brookings County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 101 km from the middle of the area, began a volume at 22:40 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
May 12, 5:43 PM CDT	TSTM WND GST 80	Florence, MN	RWIS SITE.
May 12, 5:54 PM CDT	TSTM WND GST 81	Taunton, MN	RWIS SITE.
May 12, 5:58 PM CDT	TSTM WND GST 78	1 W Marshall, MN	AWOS STATION KMML MARSHALL MUNICIPAL AIRPORT.
May 12, 6:08 PM CDT	TSTM WND GST 60	3 W Dovray, MN	MESONET STATION MN038 DOVRAY MN-30 MILE POST 49.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this severe thunderstorm warning; the first came 1 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 12, 3:27 PM CDT	Severe Thunderstorm Watch PDS	SPC	7 hr
May 12, 3:50 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 10.7 hours before the alert went out and 197 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 892 J/kg
Mixed-layer CIN: -300 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

063 
WUUS53 KFSD 122242
SVRFSD
MNC033-063-081-083-101-105-117-133-SDC011-101-122315-
/O.NEW.KFSD.SV.W.0084.220512T2242Z-220512T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
542 PM CDT Thu May 12 2022

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Lyon County in southwestern Minnesota...
  Lincoln County in southwestern Minnesota...
  Northeastern Rock County in southwestern Minnesota...
  Northwestern Jackson County in southwestern Minnesota...
  Northern Nobles County in southwestern Minnesota...
  Murray County in southwestern Minnesota...
  Western Cottonwood County in southwestern Minnesota...
  Pipestone County in southwestern Minnesota...
  Northeastern Moody County in east central South Dakota...
  Eastern Brookings County in east central South Dakota...

* Until 615 PM CDT.

* At 541 PM CDT, severe thunderstorms were located along a line
  extending from near Hendricks to Florence to near Wilmont, moving
  northeast at 65 mph.

  THESE ARE DESTRUCTIVE STORMS FOR IVANHOE, MARSHALL, TRACY, DOVRAY, 
AND SURROUNDING AREAS.

  HAZARD...80 mph wind gusts.

  SOURCE...Radar indicated.

  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.

* Severe thunderstorms will be near...
  Ivanhoe, Arco, Florence and Current Lake around 545 PM CDT.
  Balaton and Russell around 550 PM CDT.
  Slayton and Camden State Park around 555 PM CDT.
  Marshall, Tracy, Minneota, Fulda, Ghent and Taunton around 600 PM 
  CDT.
  Currie and Dovray around 605 PM CDT.
  Cottonwood and Westbrook around 610 PM CDT.
  Jeffers and Storden around 615 PM CDT.

Other locations impacted by these severe thunderstorms include
Kenneth, Avoca, Lynd, Hadley, Garvin, Kinbrae, Dundee, Iona, Magnolia
and Bushnell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1000 PM CDT for east central
South Dakota.

This is an EXTREMELY DANGEROUS SITUATION with tornado like wind
speeds expected. Mobile homes and high profile vehicles are
especially susceptible to winds of this magnitude and may be
overturned. For your protection move to an interior room on the
lowest floor of a building. These storms have the potential to cause
serious injury and significant property damage.

A Tornado Watch remains in effect until 1000 PM CDT for east central
South Dakota.

&&

LAT...LON 4449 9559 4420 9559 4420 9520 4394 9509
      4356 9606 4410 9640 4451 9686 4454 9680
      4454 9646 4463 9645 4463 9561
TIME...MOT...LOC 2241Z 232DEG 59KT 4454 9647 4422 9609 4370 9585 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH

$$

SG

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at May 12, 2:20 PM CDT, 3 hours 22 minutes earlier.

Area forecast discussion, May 12, 2:20 PM CDT, 3 hours 22 minutes before

AREA FORECAST DISCUSSION
National Weather Service Sioux Falls SD
220 PM CDT Thu May 12 2022

.SHORT TERM...(This Evening through Friday)
Issued at 219 PM CDT Thu May 12 2022

Dealing with another interesting and challenging severe weather
threat for this afternoon and evening. A strong upper level wave in
Wyoming was spreading cooler and drier air aloft into central NE
this afternoon with elevated convection develop in central NE which
was lifting fairly quickly northward. Still some question on
supercell vs. linear development and the last few runs of the HRRR
are leaning a little more towards a supercell/multicell set up vs
the earlier expectation of a strong bowing segment. Still not
completely buying into this but there will be a little concern if
the ACCAS/showers and thunderstorms moving north move through just
before peak heating which might limit the ability to get surface
based storms going and generate a more organized jet and cold pool.
Current WoFS output still suggesting that the storms that move into
areas near and west of the James Valley through 23z will have a good
chance at producing 50 knot or higher wind gusts. With the 0-3km
bulk shear vector running about 35-40 knots from 210 degrees will
need to watch any linear segment that move northeast for possible
QLCS spinups. The other thought is that with the wave and front a
touch slower than it appeared yesterday is that this initial more
cellular activity will wrap north fairly quickly mid to late
afternoon then after about 0-3z this evening a more linear system
will try to develop in north central and eastern NE and lift
northeast as the cooler and drier air aloft punch east with the
upper wave, bringing a bit higher threat for the strongest winds to
areas near and east of Interstate 29.

Deep west to southwest flow will develop tonight into Friday and
bring much drier air to the region and drop temperatures about 15 to
20 degrees. Expecting highs mostly in the lower to mid 70s on Friday
with wind gusts about 20 to 30 mph, likely closer to 40 mph north of
Interstate 90.

.LONG TERM...(Friday Night through Thursday)
Issued at 219 PM CDT Thu May 12 2022

Saturday through Monday low pressure will rotate across central
Canada which will keep a dry westerly flow across the Northern
Plains. This will bring mostly dry conditions with seasonally mild
temperatures as well as seasonally breezy conditions. Morning
lows likely to be from the lower 40s to lower 50s with afternoon
highs from about 65 to 75.

Troughiness over the western United States Tuesday into Thursday
will spread into the Northern Rockies by Thursday and bring a series
of waves into the Northern and Central Plains. Too far out to
determine timing and strength of any storms but for now does not
look like a great set up for heavier rain or severe weather. Overall
temperatures will remain seasonally mild.

&&

.AVIATION...(For the 12Z TAFS through 12Z Friday morning)
Issued at 646 AM CDT Thu May 12 2022

Isolated convection may linger near/north of Hwy 14 early in the
period, but otherwise expecting VFR conditions with increasing
southerly winds through mid afternoon. After 21Z-22Z, expecting
rapid development of thunderstorms into southeast SD, developing
into a line which moves quickly east into northwest Iowa and
southwest Minnesota this evening. Large hail and strong/damaging
winds will be possible with any thunderstorms during the late
afternoon and evening, along with at least brief MVFR-IFR
conditions. Storm timing is somewhat uncertain, but tried to
narrow down a 2-4 hour window of best chances in the TAFs.

After storms move through, a return to VFR conditions is expected.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
IA...NONE.
NE...NONE.
&&

SHORT TERM...08
LONG TERM...08
AVIATION...JH

Hazardous weather outlook, May 12, 5:05 AM CDT, 12 hours 37 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
505 AM CDT Thu May 12 2022

SDZ038-050-052-053-057>060-063>065-068-069-131015-
Beadle-Gregory-Jerauld-Sanborn-Brule-Aurora-Davison-Hanson-
Charles Mix-Douglas-Hutchinson-Bon Homme-Yankton-
505 AM CDT Thu May 12 2022

This Hazardous Weather Outlook is for central South Dakota, east
central South Dakota, south central South Dakota and southeast
South Dakota.

.DAY ONE...Today and tonight.

Thunderstorms are expected to develop late this afternoon. Large hail
up to 2 inches in diameter, wind gusts to 60 mph and an isolated
tornado are possible. As the storms move east in the early evening,
the greater threat will transition to damaging wind gusts up to 70
mph, while hail up to ping pong ball size and perhaps a tornado are
still possible. The strongest storms should move east of the James
River Valley by 8 pm this evening.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely between 4 pm and 8 pm.

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ039-040-054>056-061-062-066-067-070-071-131015-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Kingsbury-Brookings-Miner-Lake-Moody-
McCook-Minnehaha-Turner-Union-
505 AM CDT Thu May 12 2022

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, east central South
Dakota and southeast South Dakota.

.DAY ONE...Today and tonight.

Scattered thunderstorms are expected to develop west of I-29 in the
late afternoon. Storms should evolve into a squall line which will
move quickly east toward I-29, and into northwest Iowa and southwest
Minnesota in the early evening. Damaging wind gusts to 75 mph will be
the primary threat, while hail up to ping pong ball size and perhaps
a tornado are also possible. The strongest storms should move east
of out of southwest Minnesota and northwest Iowa by 11pm or midnight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is likely between 5 pm and 11 pm.

In the hours before

Local storm report, May 12, 5:29 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
529 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0415 PM     TSTM WND DMG     DANTE                   43.04N 98.19W
05/12/2022                   CHARLES MIX        SD   PUBLIC

            AN 80 FOOT BY 200 FOOT BUILDING HAS ONLY ONE
            WALL STANDING. A 42 FOOT BY 60 FOOT BUILDING
            HAS ONLY ONE STANDING WALL REMAINING.
            NUMEROUS TREES UPROOTED. ROOFS OFF
            BUSINESSES.

&&

JC

Local storm report, May 12, 5:30 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
530 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0509 PM     TSTM WND GST     1 ENE MADISON           44.02N 97.08W
05/12/2022  M97 MPH          LAKE               SD   AWOS

            AWOS STATION KMDS MADISON AIRPORT.

&&

TRM

Local storm report, May 12, 5:33 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
533 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0433 PM     DUST STORM       3 SSW BERESFORD         43.04N 96.80W
05/12/2022                   UNION              SD   PUBLIC

            VISIBILITY LESS THAN 100 FEET.

&&

JC

Local storm report, May 12, 5:38 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
538 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0502 PM     TSTM WND GST     3 SSW SIOUX FALLS       43.50N 96.76W
05/12/2022  M78 MPH          MINNEHAHA          SD   MESONET

            MESONET STATION SFSS2 SIOUX FALLS (SD
            MESONET).

&&

ST

Local storm report, May 12, 5:41 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
541 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     TSTM WND GST     3 SE WALL LAKE          43.50N 96.92W
05/12/2022  M72 MPH          MINNEHAHA          SD   MESONET

            MESONET STATION SFWS2 SIOUX FALLS 10 WSW (SD
            MESONET).

&&

ST

Local storm report, May 12, 5:42 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
542 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0531 PM     TSTM WND GST     3 NNE FLANDREAU         44.09N 96.58W
05/12/2022  M90 MPH          MOODY              SD   MESONET

            MESONET STATION FLNS2 FLANDREAU 3 NNE (SD
            MESONET).

&&

JC

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 12:09 AM CDT	Dense Fog Advisory	FSD	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more	4 hr
May 12, 9:48 AM CDT	River Flood Warning	FSD	Pipestone	24 hr
May 12, 9:48 AM CDT	River Flood Warning	FSD	Lyon	71 hr
May 12, 4:40 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Rock	50 min
May 12, 4:53 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Nobles, Rock	37 min
May 12, 5:13 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Lincoln, Lyon, Murray, Nobles, Pipestone, Rock	47 min
May 12, 5:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Jackson, Nobles, Rock	38 min
May 12, 5:37 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Rock	23 min
May 12, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Cottonwood, Jackson, Murray, Nobles	39 min
May 12, 6:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Cottonwood, Murray	19 min
May 12, 6:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Cottonwood, Jackson, Lyon, Murray, Nobles	40 min
May 12, 1:38 AM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	37 min
May 12, 3:16 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	44 min
May 12, 3:21 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Charles Mix, Douglas, Gregory	24 min
May 12, 3:40 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Charles Mix, Davison, Douglas, Gregory	50 min
May 12, 3:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Brule, Charles Mix, Gregory, Jerauld	44 min
May 12, 3:59 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 6 more	46 min
May 12, 4:11 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Aurora, Davison, Douglas, Hanson, Hutchinson, Jerauld and 1 more	49 min
May 12, 4:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Clay, Lincoln, Union, Yankton	40 min
May 12, 4:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Beadle, Jerauld, Kingsbury, Miner, Sanborn	44 min
May 12, 4:49 PM CDT	Tornado Warning	FSD	Hanson, Lake, McCook, Miner	28 min
May 12, 4:58 PM CDT	Tornado Warning	FSD	Beadle	20 min
May 12, 6:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Union	46 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2022 Severe Thunderstorm Warnings in South Dakota, 2022 Every severe thunderstorm warning in 2022

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.