Alert archive / South Dakota / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 83, NWS Sioux Falls, SD

May 12, 20228 counties in South Dakota; Lyon County, Plymouth County, Sioux County, Iowa; Rock County, Minnesota

NWS Sioux Falls, SD issued this severe thunderstorm warning at May 12, 2022, 5:37 PM CDT for 8 counties in South Dakota; Lyon County, Plymouth County, Sioux County, Iowa; Rock County, Minnesota. It was in force for 23 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: May 12, 2022, 5:37 PM CDT (22:37 UTC)
Expired: May 12, 2022, 6:00 PM CDT
In force: 23 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Lyon County, IA, Plymouth County, IA, Sioux County, IA, Rock County, MN, Clay County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD

The radar

The Sioux Falls radar (KFSD), 78 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

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

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 176 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: 1555 J/kg
Mixed-layer CIN: -323 J/kg
Mixed-layer LCL: 1486 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: -52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

810 
WUUS53 KFSD 122237
SVRFSD
IAC119-149-167-MNC133-SDC027-079-083-087-099-101-125-127-122300-
/O.NEW.KFSD.SV.W.0083.220512T2237Z-220512T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
537 PM CDT Thu May 12 2022

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Western Lyon County in northwestern Iowa...
  Western Sioux County in northwestern Iowa...
  Western Plymouth County in northwestern Iowa...
  Southwestern Rock County in southwestern Minnesota...
  Southwestern Moody County in east central South Dakota...
  Southeastern Lake County in east central South Dakota...
  Eastern Clay County in southeastern South Dakota...
  Minnehaha County in southeastern South Dakota...
  Lincoln County in southeastern South Dakota...
  Southeastern McCook County in southeastern South Dakota...
  Northeastern Turner County in southeastern South Dakota...
  Union County in southeastern South Dakota...

* Until 600 PM CDT.

* At 536 PM CDT, severe thunderstorms were located along a line
  extending from near Lake Vermillion State Recreation Area to 6
  miles south of Worthing to 6 miles southeast of Martinsburg, moving
  northeast at 55 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Severe thunderstorms will be near...
  Lake Vermillion State Recreation Area, Lennox, Wall Lake, 
  Worthing, Canistota, Humboldt, Montrose, Hudson and Newton Hills 
  State Park around 540 PM CDT.
  Canton, Tea, Hartford, Fairview and Ellis around 545 PM CDT.
  Sioux Falls, Harrisburg, Crooks, Inwood, Lake Alvin State 
  Recreation Area, Lyons and Renner around 550 PM CDT.
  Colton around 555 PM CDT.
  Brandon, Akron, Baltic, Larchwood, Valley Springs, Merrill, Hills, 
  Colman, Beaver Creek and Lester around 600 PM CDT.

Other locations impacted by these severe thunderstorms include
Brunsville, Westfield and Chatsworth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4252 9663 4255 9663 4261 9671 4265 9669
      4267 9672 4267 9680 4270 9680 4271 9682
      4317 9683 4361 9730 4402 9687 4363 9629
      4271 9625 4250 9660
TIME...MOT...LOC 2236Z 221DEG 49KT 4362 9714 4323 9673 4246 9672 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 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 17 minutes earlier.

Area forecast discussion, May 12, 2:20 PM CDT, 3 hours 17 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 32 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, 5:20 PM CDT, 17 minutes before

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

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

0512 PM     TSTM WND DMG     2 SSW SIOUX FALLS       43.52N 96.74W
05/12/2022                   MINNEHAHA          SD   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.

&&

TRM

Local storm report, May 12, 5:21 PM CDT, 16 minutes before

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

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

0511 PM     TSTM WND DMG     1 SSW HARTFORD          43.61N 96.95W
05/12/2022                   MINNEHAHA          SD   PUBLIC

            REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
            POWER POLES BROKEN.

&&

TRM

Local storm report, May 12, 5:27 PM CDT, 10 minutes before

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

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

0505 PM     TSTM WND GST     3 SE BALTIC             43.73N 96.68W
05/12/2022  M71 MPH          MINNEHAHA          SD   MESONET

            MESONET STATION BTCS2 BALTIC 3 SE (SD
            MESONET).

&&

ST

Local storm report, May 12, 5:29 PM CDT, 8 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, 7 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, 4 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

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	Brookings, Kingsbury, Lake, Minnehaha, Moody	4 hr
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, 4:40 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Clay, Hanson, Hutchinson, Lake, Lincoln, McCook and 5 more	50 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, 4:53 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Clay, Lincoln, Union	37 min
May 12, 4:58 PM CDT	Tornado Warning	FSD	Beadle	20 min
May 12, 5:13 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Brookings, Kingsbury, Lake, Miner, Minnehaha, Moody	47 min
May 12, 5:42 PM CDT	Severe Thunderstorm Warning Destructive damage threat	FSD	Brookings, Moody	33 min
May 12, 6:29 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Union	46 min
May 12, 5:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more	38 min
May 12, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Buena Vista, Cherokee, Clay, Dickinson, O'Brien, Osceola	39 min
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, 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

Nearby

Severe Thunderstorm Warnings in South Dakota, 2022 Severe Thunderstorm Warnings in Iowa, 2022 Severe Thunderstorm Warnings in Minnesota, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.