River Flood Warning 3, NWS Sioux Falls, SD

059 
WGUS83 KFSD 091347
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
847 AM CDT Thu Jul 9 2026

...The Flood Warning continues for the following rivers in South
Dakota...

  Big Sioux River near Estelline affecting Hamlin and Brookings
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

The next statement will be issued by Friday morning.

&&

SDC011-057-101600-
/O.CON.KFSD.FL.W.0003.000000T0000Z-000000T0000Z/
/BSES2.1.ER.260709T0425Z.260709T1300Z.000000T0000Z.UU/
847 AM CDT Thu Jul 9 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Estelline.

* WHEN...Until further notice.

* IMPACTS...At 1645.5 feet, widespread flooding of agricultural lands
  begins.

* ADDITIONAL DETAILS...
  - At 8:00 AM CDT Thursday the stage was 1644.8 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:00 AM CDT Thursday was 1644.8 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 1644.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4462 9700 4463 9696 4462 9694 4461 9693
      4459 9691 4457 9690 4456 9689 4454 9689
      4454 9686 4452 9685 4450 9685 4450 9690
      4451 9689 4452 9689 4453 9692 4455 9692
      4456 9694 4458 9695 4461 9698


$$

Kalin

389 
WGUS83 KFSD 101345
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
845 AM CDT Fri Jul 10 2026

...The Flood Warning continues for the following rivers in South
Dakota...

  Big Sioux River near Bruce affecting Brookings County.

  Big Sioux River near Estelline affecting Hamlin and Brookings
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

The next statement will be issued by Saturday morning.

&&

SDC011-111545-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/BRCS2.1.ER.260710T0545Z.260710T1245Z.000000T0000Z.NO/
845 AM CDT Fri Jul 10 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Bruce.

* WHEN...Until further notice.

* IMPACTS...At 8.0 feet, The lower banks on the left side of the
  river overflow.

* ADDITIONAL DETAILS...
  - At 7:45 AM CDT Friday the stage was 8.2 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 7:45 AM CDT Friday was 8.2 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 8.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4450 9685 4448 9685 4446 9686 4444 9688
      4441 9689 4439 9689 4433 9686 4433 9691
      4436 9692 4438 9692 4440 9694 4443 9694
      4446 9692 4448 9690 4450 9689


$$

SDC011-057-111545-
/O.CON.KFSD.FL.W.0003.000000T0000Z-000000T0000Z/
/BSES2.1.ER.260709T0425Z.260710T0200Z.000000T0000Z.UU/
845 AM CDT Fri Jul 10 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Estelline.

* WHEN...Until further notice.

* IMPACTS...At 1644.0 feet, significant flooding of crop and pasture
  land begins.

* ADDITIONAL DETAILS...
  - At 8:00 AM CDT Friday the stage was 1644.7 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:00 AM CDT Friday was 1645.0 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 1644.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4462 9700 4463 9696 4462 9694 4461 9693
      4459 9691 4457 9690 4456 9689 4454 9689
      4454 9686 4452 9685 4450 9685 4450 9690
      4451 9689 4452 9689 4453 9692 4455 9692
      4456 9694 4458 9695 4461 9698


$$

Kalin

634 
WGUS83 KFSD 110149
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
849 PM CDT Fri Jul 10 2026

...The Flood Warning continues for the following rivers in South
Dakota...

  Big Sioux River near Bruce affecting Brookings County.

  Big Sioux River near Estelline affecting Hamlin and Brookings
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued by Saturday evening.

&&

SDC011-120400-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/BRCS2.1.ER.260710T0545Z.260711T0045Z.000000T0000Z.NO/
849 PM CDT Fri Jul 10 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Bruce.

* WHEN...Until further notice.

* IMPACTS...At 8.0 feet, The lower banks on the left side of the
  river overflow.

* ADDITIONAL DETAILS...
  - At 7:45 PM CDT Friday the stage was 8.4 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 7:45 PM CDT Friday was 8.4 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 8.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4450 9685 4448 9685 4446 9686 4444 9688
      4441 9689 4439 9689 4433 9686 4433 9691
      4436 9692 4438 9692 4440 9694 4443 9694
      4446 9692 4448 9690 4450 9689


$$

SDC011-057-120400-
/O.CON.KFSD.FL.W.0003.000000T0000Z-000000T0000Z/
/BSES2.1.ER.260709T0425Z.260710T0200Z.000000T0000Z.UU/
849 PM CDT Fri Jul 10 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Estelline.

* WHEN...Until further notice.

* IMPACTS...At 1644.0 feet, significant flooding of crop and pasture
  land begins.

* ADDITIONAL DETAILS...
  - At 8:00 PM CDT Friday the stage was 1644.4 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:00 PM CDT Friday was 1644.98 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 1644.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4462 9700 4463 9696 4462 9694 4461 9693
      4459 9691 4457 9690 4456 9689 4454 9689
      4454 9686 4452 9685 4450 9685 4450 9690
      4451 9689 4452 9689 4453 9692 4455 9692
      4456 9694 4458 9695 4461 9698


$$

Meyers

165 
WGUS83 KFSD 111407
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
907 AM CDT Sat Jul 11 2026

...The Flood Warning continues for the following rivers in South
Dakota...

  Big Sioux River near Bruce affecting Brookings County.

  Big Sioux River near Estelline affecting Hamlin and Brookings
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued by Sunday morning.

&&

SDC011-121615-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/BRCS2.1.ER.260710T0545Z.260711T0700Z.000000T0000Z.NO/
907 AM CDT Sat Jul 11 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Bruce.

* WHEN...Until further notice.

* IMPACTS...At 8.0 feet, The lower banks on the left side of the
  river overflow.

* ADDITIONAL DETAILS...
  - At 8:45 AM CDT Saturday the stage was 8.4 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 8:45 AM CDT Saturday was 8.5 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 8.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4450 9685 4448 9685 4446 9686 4444 9688
      4441 9689 4439 9689 4433 9686 4433 9691
      4436 9692 4438 9692 4440 9694 4443 9694
      4446 9692 4448 9690 4450 9689


$$

SDC011-057-121615-
/O.CON.KFSD.FL.W.0003.000000T0000Z-000000T0000Z/
/BSES2.1.ER.260709T0425Z.260710T0200Z.000000T0000Z.UU/
907 AM CDT Sat Jul 11 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Estelline.

* WHEN...Until further notice.

* IMPACTS...At 1644.0 feet, significant flooding of crop and pasture
  land begins.

* ADDITIONAL DETAILS...
  - At 9:00 AM CDT Saturday the stage was 1644.0 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 9:00 AM CDT Saturday was 1644.4 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 1644.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4462 9700 4463 9696 4462 9694 4461 9693
      4459 9691 4457 9690 4456 9689 4454 9689
      4454 9686 4452 9685 4450 9685 4450 9690
      4451 9689 4452 9689 4453 9692 4455 9692
      4456 9694 4458 9695 4461 9698


$$

Dux

955 
WGUS83 KFSD 111859
FLSFSD

Flood Statement
National Weather Service Sioux Falls SD
159 PM CDT Sat Jul 11 2026

...The Flood Warning continues for the following rivers in South
Dakota...

  Big Sioux River near Bruce affecting Brookings County.

...The Flood Warning is cancelled for the following rivers in South
Dakota...

  Big Sioux River near Estelline affecting Hamlin and Brookings
  Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Additional information is available at www.weather.gov.

The next statement will be issued by this afternoon.

&&

SDC011-057-112000-
/O.CAN.KFSD.FL.W.0003.000000T0000Z-260711T1859Z/
/BSES2.1.ER.260709T0425Z.260710T0200Z.260711T1430Z.UU/
159 PM CDT Sat Jul 11 2026

...FLOOD WARNING IS CANCELLED...

The Flood Warning is cancelled for
  the Big Sioux River near Estelline.

* ADDITIONAL DETAILS...
  - At 1:00 PM CDT Saturday the stage was 1643.8 feet.
  - Forecast...No forecast is available for this location.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4462 9700 4463 9696 4462 9694 4461 9693
      4459 9691 4457 9690 4456 9689 4454 9689
      4454 9686 4452 9685 4450 9685 4450 9690
      4451 9689 4452 9689 4453 9692 4455 9692
      4456 9694 4458 9695 4461 9698


$$

SDC011-122100-
/O.CON.KFSD.FL.W.0004.000000T0000Z-000000T0000Z/
/BRCS2.1.ER.260710T0545Z.260711T0700Z.000000T0000Z.NO/
159 PM CDT Sat Jul 11 2026

...FLOOD WARNING REMAINS IN EFFECT UNTIL FURTHER NOTICE...

* WHAT...Minor flooding is occurring.

* WHERE...Big Sioux River near Bruce.

* WHEN...Until further notice.

* IMPACTS...At 8.0 feet, The lower banks on the left side of the
  river overflow.

* ADDITIONAL DETAILS...
  - At 1:45 PM CDT Saturday the stage was 8.3 feet.
  - Recent Activity...The maximum river stage in the 24 hours ending
    at 1:45 PM CDT Saturday was 8.5 feet.
  - Forecast...No forecast is available for this location.
  - Flood stage is 8.0 feet.
  - Stay up to date with the latest river observations and forecasts
    at: water.noaa.gov

&&

LAT...LON 4450 9685 4448 9685 4446 9686 4444 9688
      4441 9689 4439 9689 4433 9686 4433 9691
      4436 9692 4438 9692 4440 9694 4443 9694
      4446 9692 4448 9690 4450 9689


$$

Dux

Area Forecast Discussion
National Weather Service Sioux Falls SD
912 PM CDT Wed Jul 8 2026

.KEY MESSAGES...

- High temperatures remain on track to rise to the 90s to 100
  degree mark towards this weekend and into early next week.

- This weekend and most of next week are expected to be mainly
  dry.

&&

.UPDATE...
Issued at 910 PM CDT Wed Jul 8 2026

The slow moving quasi-stationary front from the past couple of days
has pushed off to the southeast, taking our severe weather chances
with it. Light northerly surface winds behind the front have begun
to cool the boundary layer. As cooling continues an inversion will
quickly set in over much of the region. This will work to trap the
moisture from recent rain near the surface. As we enter the early
hours of Thursday morning surface temperatures are expected to fall
to, or very near to, the dew point temperatures. Patchy, dense fog
is likely to develop in response, especially along and east of the
James River Valley. Ensemble probabilities of visibility decreasing
below 5 miles is low at around 30%. However, please ensure you are
prepared for rapidly changing conditions. After sunrise winds will
become northeast to east but will remain light. With little mixing
occurring as a result, fog may hang on until the middle of the
morning.

Thursday will be dry with highs climbing to around average for this
time of year, in the low to mid 80s. Thursday evening a fast moving
short wave could bring rain chances to the region. Uncertainty
remains high as most guidance has the storms either splitting and
going around our CWA, or dissipating rapidly as they move east from
central South Dakota. Overall dynamics are weak, and so if storms do
form the risk for severe weather is low. Friday during the day looks
to be dry and mostly sunny with highs in the mid 80s to low 90s west
of the James River Valley.

This weekend a strong, high amplitude high pressure ridge will build
over the central United States. This ridge will persist for much of
the following week. Highs during this time will be seasonably warm
for July, in the 90s with a few 100s sprinkled in. Dew points will
be in the 60s with low 70s possible over northwest Iowa. As we have
entered peak growing season, dew points may be influenced by
evapotranspiration (aka Corn Sweat), resulting in localized higher
humidity. Potentially dangerous heat index values may be possible at
times. Please ensure you are properly hydrated and take breaks out
of the heat. The forecast for this time is expected to remain mostly
dry.

&&

.DISCUSSION...
Issued at 208 PM CDT Wed Jul 8 2026

A few light rain showers persist across mainly northwest Iowa this
afternoon. A surface trough and associated cold front continue to
track through the forecast area early this afternoon. The mid level
clouds associated with these light rain showers continue to sit over
mainly northwest Iowa and surrounding locations. This has prevented
locations in this area from heating out. The cooler temperatures
look to also delay new convective development as the cold front
pushes into this area. Still, these clouds look to clear/break up
enough to allow adequate instability to develop with a magnitude up
to about 2,000 J/kg over the course of the afternoon timeframe.
Vertical shear values will be on the weaker side of things with a
magnitude of roughly 20-30 knots. Latest hi-res guidance shows that
a small, bi-modal severe weather event is on the table for this
afternoon and evening. Storms look to develop on both the pre-
frontal trough and trailing cold front. Storm development looks to
take place across mainly northwest Iowa and adjacent areas this
afternoon with a timeframe from from about 4 pm to 10 pm. With the
cold frontal forcing, storms look to grow into a line as they push
out of the area this evening. While vertical shear magnitudes will
be on the lower side, hodographs show a weak but classic veer-back
profile. With weak cold advection aloft, lapse rates will steepen
just a bit more and allow for a large hail threat. Soundings do show
slightly more saturated profiles in the hail growth zone (HGZ) which
will tone down the hail threat a bit, with some of the largest
stones growing up to half dollar size. DCAPE values will be
sufficient with values up to 800 to 1,000 J/kg, keeping a damaging
wind threat in place with the strongest gusts up to 65 mph. The
large hail threat will come with the initial storm development
before transitioning to a damaging wind threat as storms grow
upscale. Pockets of moderate to heavy rainfall could result in
localized ponding in low lying/urban areas as storms roll through.
The storm threat will end this evening, leaving mostly quiet
conditions for the overnight hours. Low temperatures will fall to
the 60s.

Seasonable and mostly dry conditions will return for the end of the
week with high temperatures remaining in the 80s to just touching
90F. Winds will be light, making for a pleasant Thursday and Friday.

Heights begin to rise aloft on Saturday, beginning to warm
temperatures with highs rising to the 80s and 90s. Sunday will kick
off the first day of near to above normal temperatures as medium
range and ensemble guidance show a 600 dam ridge building into the
Northern Plains. This ridge looks to persist through the first half
of next week, brining hot and humid conditions with it. The
ensembles show a 60-100% chance for highs to exceed 90F Sunday
through Tuesday near and west of I-29. Chances for exceeding 100F
drop to 40-70% for the same period of time with Tuesday having the
highest probabilities. The ensembles also show a broad 40-100%
chance for dew points to exceed 60F as well. All these probabilities
to say that hot and humid conditions are expected late this weekend
and into early next week. A few ensemble members show the ridge
beginning to flatten next Wednesday which could begin to trend
temperatures down. There remains uncertainty regarding how long the
ridge remains strong so something to keep an eye on heading
forward.

&&

.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/...
Issued at 626 PM CDT Wed Jul 8 2026

Strong thunderstorms have exited to the southeast of our region. A
few isolated light showers will remain possible through early this
evening for areas of northwest Iowa.

A mix of VFR and MVFR is expected to prevail for the majority of the
period. A shallow inversion has begun to form trapping moisture just
above the surface. Winds decrease to light and variable after sunset
and as the surface continues to cool areas of patchy dense fog are
expected to form. Ceilings and visibility may drop to IFR at times
in the early morning hours of Thursday. Areas along and east of I-29
are the most likely to see dense fog. Ceilings and visibility
improve by mid-morning and the rest of the day will be mostly sunny
with light northeast winds.

&&

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

&&

UPDATE...AJP
DISCUSSION...Meyers
AVIATION...AJP

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
914 PM CDT Wed Jul 8 2026

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-100215-
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-
914 PM CDT Wed Jul 8 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...Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Heat and humidity return this weekend into early next week with high
temperatures approaching the mid 90s to near 100 degrees west of the
James River. Heat index values may approach critical levels at times.
Be sure you are properly hydrated and take breaks out of the heat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
623 PM CDT Wed Jul 8 2026

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

0603 PM     Tstm Wnd Gst     3 WNW Ida Grove         42.35N 95.52W
07/08/2026  M50 MPH          Ida                IA   Public

            A personal weather station just northwest of
            Ida Grove recorded a 50 mph wind gust.

&&

IG

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
625 PM CDT Wed Jul 8 2026

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

0602 PM     Tstm Wnd Gst     5 NNW Arthur            42.41N 95.38W
07/08/2026  M55 MPH          Ida                IA   Public

            A personal weather station just north west
            of Arthur recorded a 55 mph wind gust.

&&

IG

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
628 PM CDT Wed Jul 8 2026

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

0507 PM     Hail             Pierson                 42.54N 95.87W
07/08/2026  E1.00 Inch       Woodbury           IA   Public

            Photo and video of quarter sized hail via
            social media.

&&

TRM