Severe Thunderstorm Warning 1, NWS Sioux Falls, SD

568 
WWUS53 KFSD 132057
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
357 PM CDT Mon Apr 13 2026

SDC067-132130-
/O.CON.KFSD.SV.W.0001.000000T0000Z-260413T2130Z/
Hutchinson SD-
357 PM CDT Mon Apr 13 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTH CENTRAL HUTCHINSON COUNTY...

At 357 PM CDT, a severe thunderstorm was located near Kaylor, or 13
miles southeast of Parkston, moving northeast at 20 mph.

HAZARD...Golf 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 remain over mainly rural areas of south
central Hutchinson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.

&&

LAT...LON 4321 9783 4330 9787 4338 9767 4326 9762
TIME...MOT...LOC 2057Z 243DEG 16KT 4327 9777 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

IG

629 
WWUS53 KFSD 132103
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
403 PM CDT Mon Apr 13 2026

SDC067-132130-
/O.CON.KFSD.SV.W.0001.000000T0000Z-260413T2130Z/
Hutchinson SD-
403 PM CDT Mon Apr 13 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR CENTRAL HUTCHINSON COUNTY...

At 403 PM CDT, a severe thunderstorm was located 7 miles west of
Menno, or 15 miles southeast of Parkston, moving east at 15 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 remain over mainly rural areas of
central Hutchinson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Sioux Falls.

&&

LAT...LON 4323 9776 4332 9781 4338 9767 4326 9762
TIME...MOT...LOC 2103Z 253DEG 13KT 4328 9772 

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

$$

IG

Area Forecast Discussion
National Weather Service Sioux Falls SD
250 PM CDT Mon Apr 13 2026

.KEY MESSAGES...

- Thunderstorms return this afternoon and evening. Scattered
  strong to severe storms expected - greatest risk for
  southwestern Minnesota into adjacent areas of South Dakota and
  northwest Iowa. Timing of greatest concern is 4 to 9 PM.

- Main hazards are large hail greater than 2 inches in diameter
  and wind gusts to 70 mph. A tornado or two are also possible.
  Have a severe weather plan and multiple ways to receive
  warnings.

- Periodic chances (20-60%) for showers and thunderstorms
  continue this week. Details remain uncertain at this time.

&&

.DISCUSSION...
Issued at 238 PM CDT Mon Apr 13 2026

Scattered thunderstorms are set to develop over the next
few hours, bringing the potential for a few severe storms with large
hail, damaging winds, and perhaps a tornado or two. As of 2 pm,
a surface low is located over northern Nebraska with a warm
front extending northeast of it across far southeastern South
Dakota into northwest Iowa. Dew points in the 60s have been
gradually spreading northward, and these higher dew points are
expected to reach the I-90 corridor over the next couple of
hours. This boundary will be the focus of initial storm
development, with these storms having access to 35-50 kts of
effective bulk shear and 1500-2000 J/kg of MLCAPE. There are
questions though on how much some high clouds have limited the
area from reaching full heating potential, but if a storm can
get going then steep mid level lapse rates of 7.5-8.5 degrees
C/km and mostly straight, elongated hodographs will favor large
hail to around 2 inches in diameter or larger. The secondary
threat will be damaging wind gusts up to 70 mph. If a storm can
get rooted to the aforementioned surface warm front, then a
tornado or two will also be possible. Can't rule out a strong
tornado either, primarily over southwest Minnesota. As the low
pressure system drift across the area, a few additional showers
and storms look to develop farther south across northwest Iowa
(down to about IA Highway-3, or just north of US Highway-20)
within the warm sector around sunset. These storms could also be
on the strong to severe side, with an isolated instance of
quarter sized hail and 60 mph as the threats.

Showers and storms will exit off to our east by the mid
evening hours, leaving mostly quiet conditions in its wake. A few
showers may develop in central South Dakota prior to daybreak
Tuesday, but dry air should win out and prevent most if not all of
this from reaching the ground. Patchy fog will also be possible
by early Tuesday morning across portions of northwest Iowa and
southwest Minnesota as winds turn light and variable overnight
and ample moisture remains in place. Temperatures tonight drop
mainly in the 40s, though some 50s are possible in our
easternmost areas. Low chances for showers continue into the day
on Tuesday, but activity is expected to remain spotty at best
as rain continues to battle a dry sub cloud layer. Highs will
range from the 60s northwest to 70s southeast. Rain chances look
to increase Tuesday night into Wednesday as two shortwave
troughs impact our area. The best chances of rain and storms
look to be over northwest Iowa and adjacent areas of Nebraska,
South Dakota, and Minnesota. At this time, severe weather looks
unlikely with this system as the better instability looks to be
off to our south and east.

Rain and storms exit off to our east by Wednesday night, leading to
a dry Thursday. Winds look to increase on Thursday especially west
of I-29 closer to a deepening surface low, and winds may take on a
southwesterly component especially in south central South Dakota.
This could lead to another day with higher fire danger as
temperatures will be warm and relative humidity values drop to 25%
or below mainly along and west of the James River. Still some
uncertainty into how breezy the winds will be, so keep up to date
with the latest forecast. Not too much time to look into the
extended forecast given the near term severe weather threat, but
guidance is in fairly good agreement that the western trough
will begin to move into our area by the end of the work
week/early weekend. This could bring more rain and storms to our
area on Friday and then colder weather into Saturday as
guidance indicates a stronger push of cold air advection behind
this system.

&&

.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...
Issued at 1241 PM CDT Mon Apr 13 2026

Isolated to widely scattered showers and storms are expected to
develop this afternoon, especially east of I-29 into southern
Minnesota and northern Iowa. Enough confidence to at least include a
PROB30 group for thunderstorms at KFSD, but it looks like storms
should stay largely east of KSUX and KHON. Storms will be capable of
large hail and damaging winds. Showers and storms will quickly push
off to our east this evening, leading to quieter conditions
overnight. Some patchy fog is possible mainly over portions of
northwest Iowa and southwest Minnesota Tuesday morning.

A frontal system will move across the area today, changing winds
from a more southerly direction to a more northerly direction as we
head into the evening hours. Winds turn mainly light and variable
overnight and stay fairly light through the end of the period.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
IA...None.
NE...None.

&&

DISCUSSION...Samet
AVIATION...Samet

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
350 AM CDT Mon Apr 13 2026

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-052>062-065>071-140900-
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-Jerauld-
Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-
Minnehaha-Hutchinson-Turner-Bon Homme-Yankton-Union-
350 AM CDT Mon Apr 13 2026

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.

Patchy morning fog leads to visibility below two miles at times,
mainly in northwestern Iowa.

Scattered strong to severe thunderstorms expected Monday afternoon
and evening. Some storms may produce large hail 2 inches in diameter
and damaging wind gusts up to 70 mph. A tornado or two cannot be
ruled out. Greatest risk of storms is north of I-90 between 4 and
10 PM.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

More widespread chances for showers and thunderstorms exists for
Tuesday afternoon into Wednesday. This more active pattern continues
into the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

SDZ050-063-064-140900-
Gregory-Charles Mix-Douglas-
350 AM CDT Mon Apr 13 2026

This Hazardous Weather Outlook is for south central South Dakota.

.DAY ONE...Today and tonight.

Elevated fire danger is expected this afternoon and evening with
humidity below 20% and west wind gusts around 20 mph.

Isolated thunderstorms are possible. Risk of strong to severe storms
is low, but a stronger storm could produce large hail and damaging
winds.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

More widespread chances for showers and thunderstorms exists for
Tuesday afternoon into Wednesday. This more active pattern continues
into the weekend.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
339 PM CDT Mon Apr 13 2026

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

0332 PM     Hail             Tripp                   43.23N 97.97W
04/13/2026  E0.75 Inch       Hutchinson         SD   Public

            Report from mPING: Dime (0.75 in.).

&&

TRM