Alert archive / Minnesota / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 281, NWS Sioux Falls, SD

August 18, 2022Jackson County, Nobles County, Minnesota; Dickinson County, Osceola County, Iowa

NWS Sioux Falls, SD issued this severe thunderstorm warning at Aug 18, 2022, 6:09 PM CDT for Jackson County, Nobles County, Minnesota; Dickinson County, Osceola County, Iowa. It was in force for 51 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: Aug 18, 2022, 6:09 PM CDT (23:09 UTC)
Expired: Aug 18, 2022, 7:00 PM CDT
In force: 51 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Dickinson County, IA, Osceola County, IA, Jackson County, MN, Nobles County, MN

The radar

The Sioux Falls radar (KFSD), 93 km from the middle of the area, began a volume at 23:10 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 18, 6:12 PM CDT	HAIL 1	Worthington, MN	.
Aug 18, 6:17 PM CDT	TSTM WND DMG	Worthington, MN	LARGE TREE DOWN BLOCKING ROAD. WINDS ESTIMATED 60 MPH.
Aug 18, 6:23 PM CDT	HAIL 1.75	5 Ssw Worthington, MN
Aug 18, 6:45 PM CDT	HAIL 1	4 Nne Harris, IA	CORRECTS PREVIOUS HAIL REPORT FROM 8 NW OCHEYEDAN.

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 3 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
Aug 18, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.2 hours before the alert went out and 209 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: 540 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1141 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

170 
WUUS53 KFSD 182309
SVRFSD
IAC059-143-MNC063-105-190000-
/O.NEW.KFSD.SV.W.0281.220818T2309Z-220819T0000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
609 PM CDT Thu Aug 18 2022

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Northeastern Osceola County in northwestern Iowa...
  Northwestern Dickinson County in northwestern Iowa...
  Southwestern Jackson County in southwestern Minnesota...
  Eastern Nobles County in southwestern Minnesota...

* Until 700 PM CDT.

* At 609 PM CDT, a severe thunderstorm was located near Worthington,
  moving east at 25 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Worthington around 620 PM CDT.
  Brewster around 630 PM CDT.
  Round Lake around 640 PM CDT.
  Harris around 650 PM CDT.
  Lakefield around 700 PM CDT.

Other locations impacted by this severe thunderstorm include Okabena.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4359 9583 4383 9567 4370 9513 4339 9542
TIME...MOT...LOC 2309Z 288DEG 22KT 4369 9567 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SG

1 follow-up statement

186 
WWUS53 KFSD 182336
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
636 PM CDT Thu Aug 18 2022

IAC059-143-MNC063-105-190000-
/O.CON.KFSD.SV.W.0281.000000T0000Z-220819T0000Z/
Osceola IA-Dickinson IA-Jackson MN-Nobles MN-
636 PM CDT Thu Aug 18 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR NORTHEASTERN OSCEOLA...NORTHWESTERN DICKINSON...SOUTHWESTERN
JACKSON AND SOUTHEASTERN NOBLES COUNTIES...

At 635 PM CDT, a severe thunderstorm was located near Round Lake, or
7 miles southeast of Worthington, moving southeast at 25 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

This severe storm will be near...
  Harris around 650 PM CDT.
  Lakefield around 700 PM CDT.

Other locations impacted by this severe thunderstorm include Okabena.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4355 9575 4378 9547 4370 9513 4339 9542
TIME...MOT...LOC 2335Z 294DEG 23KT 4358 9546 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 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 Aug 18, 2:46 PM CDT, 3 hours 23 minutes earlier.

Area forecast discussion, Aug 18, 2:46 PM CDT, 3 hours 23 minutes before

AREA FORECAST DISCUSSION
National Weather Service Sioux Falls SD
246 PM CDT Thu Aug 18 2022

.SHORT TERM...(This Evening through Friday)
Issued at 245 PM CDT Thu Aug 18 2022

A moderately strong jet max will dive south late this afternoon and
evening helping bring a chance for showers and thunderstorms to the
area. Early afternoon satellite shows what may be the mid level
wave dropping south towards De Smet and Brookings with the surface
cool front accelerating a little more quickly than expected towards
I-29. Went ahead and decreased the chances for thunderstorms west of
I-29 and especially near and west of the James River. The focus of
this convection should be diurnal heating and frontal forcing which
means the best time will be from about 5 pm to 9 pm today. Overall
instability this evening is moderate, CAPE about 1500 J/kg, with the
EML running about 7 to 7.5 degrees C. However the shear is pretty
minimal so any severe threat should be very isolated with what will
more than likely be some pulsy updrafts that collapse on themselves
fairly quickly. While locally heavy rain will be possible the storms
should not train and are not expected to move overly slow so not
anticipating any flash flooding threat. PWAT values also about 1.25-
1.3 inches so not excessively high either. After this evening we
may see a lull in showery activity until mid to late morning on
Friday as the main upper level low drops south. The models are in
good agreement in expanding the showery activity from north to south
late Friday morning into the evening. Once again, heavy rain is not
expected, but some locally higher amounts around an inch or inch and
a half are possible. Overall, should be a cloudy and wet day Friday.
Highs mainly upper 60s to mid 70s.

.LONG TERM...(Friday Night through Thursday)
Issued at 245 PM CDT Thu Aug 18 2022

The upper level low slowly shifts southeast on Saturday. Some
residual showers will be possible, mainly in the morning. Otherwise
gradual clearing and a north wind will keep temperatures a bit
cooler, with highs mainly in the mid to upper 70s.

Sunday into Thursday should be a quiet period of weather as a broad
upper level ridge builds to the west and the area remains in a mild
and dry flow regime. Overall highs will be in the 70s to lower 80s
on Sunday, then mainly in the 80s Monday through Thursday. Lows
should generally be from 55 to 65. The chances for rainfall will be
small, but by Thursday there are some hints of some energy that
could bring rainfall.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1209 PM CDT Thu Aug 18 2022

Showers and thunderstorms will be possible later this afternoon
into the evening. A few of these storms may be strong to severe,
although that threat should remain isolated. The best chance for
the stronger storms will be near I-29 and into northwest IA and
southwest MN. There will be the potential for some MVFR and IFR
ceilings late tonight into Friday, but confidence is marginal.
Additional showers and isolated thunderstorms are again expected
on Friday.

&&

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

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

Hazardous weather outlook, Aug 18, 3:09 AM CDT, 15 hours before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
309 AM CDT Thu Aug 18 2022

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-190815-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-
Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-
Union-
309 AM CDT Thu Aug 18 2022

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

.DAY ONE...Today and tonight.

Scattered thunderstorms are expected to develop this afternoon and
evening. Though most storms should remain below severe limits,
isolated stronger storms may produce wind gusts of 55 to 65 mph or
hail to the size of quarters. At this time, the favored area for
stronger storms looks occur along and east of the James River to just
east of the I-29 corridor.

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

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Aug 18, 4:27 PM CDT, 1 hour 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
427 PM CDT THU AUG 18 2022

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

0319 PM     TSTM WND DMG     5 ENE MARSHALL          44.48N 95.71W
08/18/2022                   LYON               MN   TRAINED SPOTTER

            SEVERAL 3 TO 4 INCH BRANCHES DOWN. 5 ACRES
            OF BEANS DAMAGED.

&&

JC

Local storm report, Aug 18, 5:51 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
551 PM CDT THU AUG 18 2022

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

0544 PM     HAIL             BRUNSVILLE              42.81N 96.27W
08/18/2022  M0.88 INCH       PLYMOUTH           IA   TRAINED SPOTTER

            DIME TO NICKEL HAIL.

&&

JC

Local storm report, Aug 18, 5:53 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
553 PM CDT THU AUG 18 2022

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

0542 PM     HAIL             8 SSW ROCK VALLEY       43.10N 96.36W
08/18/2022  M1.75 INCH       SIOUX              IA   PUBLIC

&&

JC

Local storm report, Aug 18, 5:57 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
557 PM CDT THU AUG 18 2022

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

0544 PM     HAIL             8 SSW ROCK VALLEY       43.10N 96.36W
08/18/2022  M2.50 INCH       SIOUX              IA   PUBLIC

            REPORT FROM MPING: TENNIS BALL (2.50 IN.).

&&

JC

Local storm report, Aug 18, 6:02 PM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
602 PM CDT THU AUG 18 2022

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

0558 PM     HAIL             1 S BRUNSVILLE          42.80N 96.26W
08/18/2022  M1.25 INCH       PLYMOUTH           IA   PUBLIC

            REPORT FROM MPING: HALF DOLLAR (1.25 IN.).

&&

JC

Local storm report, Aug 18, 6:06 PM CDT, 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
606 PM CDT THU AUG 18 2022

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

0556 PM     HAIL             BRUNSVILLE              42.81N 96.27W
08/18/2022  M1.00 INCH       PLYMOUTH           IA   CO-OP OBSERVER

            MOSTLY NICKEL, BUT A FEW QUARTER SIZE
            HAILSTONES.

&&

JC

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 2:50 PM CDT	Severe Thunderstorm Warning	FSD	Lincoln, Lyon	40 min
Aug 18, 3:09 PM CDT	Severe Thunderstorm Warning	FSD	Lyon	51 min
Aug 18, 4:22 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Lyon, Murray	38 min
Aug 18, 5:15 PM CDT	Severe Thunderstorm Warning	FSD	Cottonwood, Jackson, Murray, Nobles	45 min
Aug 18, 5:41 PM CDT	Severe Thunderstorm Warning	FSD	Jackson, Nobles	34 min
Aug 18, 6:45 PM CDT	Severe Thunderstorm Warning	FSD	Jackson, Nobles	45 min
Aug 18, 5:32 PM CDT	Severe Thunderstorm Warning	FSD	Sioux	43 min
Aug 18, 5:55 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Sioux	35 min
Aug 18, 6:15 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Plymouth, Sioux	45 min
Aug 18, 6:23 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	52 min
Aug 18, 6:52 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	38 min
Aug 18, 6:56 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Dickinson, O'Brien, Osceola	49 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2022 Severe Thunderstorm Warnings in Iowa, 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.