Flash Flood Warning 2, NWS Aberdeen, SD

905 
WGUS73 KABR 080813
FFSABR

Flash Flood Statement
National Weather Service Aberdeen SD
313 AM CDT Wed Jul 8 2026

SDC013-081300-
/O.CON.KABR.FF.W.0002.000000T0000Z-260708T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brown SD-
313 AM CDT Wed Jul 8 2026

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING
FOR WEST CENTRAL BROWN COUNTY...

At 313 AM CDT, trained weather spotters reported thunderstorms
producing heavy rain across the warned area. Between 2 and 4 inches
of rain have fallen. Flooding impacts will continue, but no
additional rainfall is expected. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Trained spotters reported. City of Aberdeen employee reports
         vehicles stalled due to water and multiple streets
         completely underwater, at least a foot deep.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Aberdeen and Bath.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4552 9857 4542 9857 4542 9829 4552 9829

FLASH FLOOD...OBSERVED

$$

BC

378 
WGUS73 KABR 081258
FFSABR

Flash Flood Statement
National Weather Service Aberdeen SD
758 AM CDT Wed Jul 8 2026

SDC013-081308-
/O.EXP.KABR.FF.W.0002.000000T0000Z-260708T1300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Brown SD-
758 AM CDT Wed Jul 8 2026

...FLASH FLOOD WARNING WILL EXPIRE AT 8 AM CDT THIS MORNING FOR WEST
CENTRAL BROWN COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.

&&

LAT...LON 4552 9857 4542 9857 4542 9829 4552 9829

$$

20

Area Forecast Discussion...UPDATED
National Weather Service Aberdeen SD
1247 AM CDT Wed Jul 8 2026

.KEY MESSAGES...

- A Slight Risk for severe thunderstorms (level 2 out of 5) is
  in place today. All severe threats, including wind of 60 to
  75 miles per hour, hail of 1 to 1.5 inches in diameter, and
  tornadoes will be possible.

- There is also a Slight Risk for excessive rainfall leading to
  flash flooding (a level 2 of 4 threat) in place over much of
  the area today. The greatest chances for excessive rainfall
  will be over north central and northeast SD as well as western
  MN. These areas have already received 1-3 inches of rain from
  this morning's storms. These areas are expected to see an
  additional 1-2" of rain at least, with the heaviest rain
  expected in the evening. Areas that see multiple round of
  storms may see as much as 2-4" of rain in total.

- A slight cooldown is expected Wednesday through at least
  Thursday, with widespread near-normal to just below normal
  high temperatures (low to mid 80s). Signs point to a warming
  trend beginning by the end of the week, and highs may
  potentially hit triple digits over the weekend.

&&

.UPDATE...
Issued at 1234 AM CDT Wed Jul 8 2026

See below for an aviation forecast discussion for the 06Z TAFs.

Also, allowed Severe Thunderstorm Watch 469 to expire at
midnight local time, but did reposition the Flood Watch from
north central SD over to northeast SD into west central MN,
valid until 5 AM CDT, to cover ongoing (and any future
developing) heavy rain-producing thunderstorms there.

UPDATE Issued at 731 PM CDT Tue Jul 7 2026

Severe Thunderstorm Watch 469 was expanded across north central
SD eastward into the James River valley to account for elevated
convection across northern SD capable of producing hail. Best
instability remains further south over the CWA and have seen
convection trying to form west of Pierre. Have been adjusting
PoPs this evening to account for radar trends. Will be watching
the northern CWA for flooding potential as well, especially for
those areas just north of Hwy 12 who received heavy rainfall
earlier this morning. Aviation discussion has also been update
below for the 00Z TAFs.

&&

.DISCUSSION...
Issued at 1219 PM CDT Tue Jul 7 2026

As of about 12:30 PM CDT, temperatures around the area are in the
low 80s with winds out of the north behind the front and out of the
southeast ahead of the front. This front will once again be the
focus for storm development late this afternoon into the evening
hours. The storms from this morning have moved out of the forecast
area, leaving behind some rainfall totals between 1.5 and 2 inches,
localized up to 3 inches. This will play a role in flooding
potential later this afternoon and evening.

A low pressure system starts to move into southwest SD today with a
nose moving into south central SD. Storms will start to form in this
area of low pressure and along the front in central SD around 5 to 7
PM. The environment lacks low level shear but surface to 1 km SRH
from the RAP is pretty good along the front. This will be supportive
of tornadoes. Lapse rates are around 7-7.5 C/km and there is plenty
of CAPE to support supercells with large hail 1 to 1.5 inches in
diameter and wind gusts of 60-75 mph. SPC has highlighted the
forecast area in slight risk (level 2 out of 5) for severe weather
with a 2% tornado risk along and around the front. The HREF shows
storm motion in generally a southwesterly direction at 5 to 10 kts,
so very slow. This, combined with PWAT values of 1.5 to 2 inches
will increase chances of flooding, especially in east/northeast SD.
There is potential for storms to become more linear and transition
into a MCS with an increased chance for damaging winds. Storms are
expected to last into the morning hours of Wednesday.

The next big story of the forecast is a ridge that moves into our
area from the west this weekend into next week. This will result in
several days of hot weather. Highs Sunday through Tuesday are
expected to be 10-20 degrees above average for this time of year
with heat index values near or exceeding 100 degrees. This will put
HeatRisk into the moderate to major categories, with portions of
central and northeast SD reaching the extreme category both Monday
and Tuesday. This will affect anyone. Make sure to keep a look out
for signs of heat related illnesses, especially with outdoor events.

&&

.AVIATION /06Z TAFS THROUGH 06Z THURSDAY/...
Issued at 1234 AM CDT Wed Jul 8 2026

Terminals KABR,KATY,KPIR,KMBG

Areas of TSRA/+TSRA across northeast SD into west central MN
early this morning will be affecting KABR/KATY for the first
couple of hours of the TAF valid period. MVFR/IFR vsbys can be
expected with the heavy rain-producing thunderstorms there.
KABR is dealing with a comms issue, but in house real-time data
should permit for amendments to KABR TAF. KMBG comms have also
gone down, and will be carrying AMD NOT SKED on that TAF.
MVFR/IFR CIGs are forecast to develop/increase across the
region by morning and persist for, at least, the first half of
the day before there is any potential of VFR conditions
returning.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...Flood Watch until 5 AM CDT early this morning for SDZ006>008-
     011-021.
MN...Flood Watch until 5 AM CDT early this morning for MNZ039-046.

&&

UPDATE...10
DISCUSSION...13
AVIATION...10

Hazardous Weather Outlook
National Weather Service Aberdeen SD
311 AM CDT Tue Jul 7 2026

MNZ039-046-SDZ003>011-015>023-034-036-037-051-080815-
Traverse-Big Stone-Corson-Campbell-McPherson-Brown-Marshall-Roberts-
Walworth-Edmunds-Day-Dewey-Potter-Faulk-Spink-Clark-Codington-Grant-
Hamlin-Deuel-Sully-Hyde-Hand-Buffalo-
311 AM CDT Tue Jul 7 2026 /211 AM MDT Tue Jul 7 2026/

This Hazardous Weather Outlook is for west central Minnesota,
central South Dakota, north central South Dakota and northeast
South Dakota.

.DAY ONE...Today and tonight.

A Slight Risk for severe thundrestorms (Level 2 of 5) is in place
for storms beginning this morning and this afternoon and continuing
through the evening and overnight periods. All severe threats,
including wind gusts of 60 to 70 miles per hour, hail of 1 inch in
diameter, and tornadoes will be possible. A Slight Risk for Excessive
Rainfall (Level 2 of 4) is in effect for these storms as well.
Multiple rounds of thunderstorms producing heavy rainfall may track
over the same area, leading to the potential for flash flooding. Most
areas, over north central and northeastern South Dakota as well as
western Minnesota are expected to see 1 to 2 inches of rain, with the
heaviest being during the evening hours. Areas that see multiple
rounds of storms may see as much as 2 to 4 inches of rain in total.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

SDZ033-035-045-048-080815-
Stanley-Hughes-Jones-Lyman-
311 AM CDT Tue Jul 7 2026 /211 AM MDT Tue Jul 7 2026/

This Hazardous Weather Outlook is for central South Dakota.

.DAY ONE...Today and tonight.

A Slight Risk for severe thundrestorms (Level 2 of 5) is in place
for storms beginning this morning and this afternoon and continuing
through the evening and overnight periods. All severe threats,
including wind gusts of 60 to 70 miles per hour, hail of 1 inch in
diameter, and tornadoes will be possible. A Marginal Risk for
Excessive Rainfall (Level 1 of 4) is in effect for these storms as
well due to the potential for thunderstorms to produce heavy
rainfall leading to flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.

Preliminary Local Storm Report
National Weather Service Aberdeen SD
1057 PM CDT Tue Jul 7 2026

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

1049 PM     Tstm Wnd Gst     1 NE Mina               45.45N 98.74W
07/07/2026  M60 MPH          Edmunds            SD   Public

            Personal weather station 1 mile northeast of
            Mina recorded a wind gust of 60 miles per
            hour.

&&

BC

Special Weather Statement
National Weather Service Aberdeen SD
1100 PM CDT Tue Jul 7 2026

SDZ005-006-010-080445-
Brown SD-McPherson SD-Edmunds SD-
1100 PM CDT Tue Jul 7 2026

...STRONG THUNDERSTORMS WILL IMPACT EASTERN EDMUNDS...CENTRAL BROWN
AND SOUTHEASTERN MCPHERSON COUNTIES THROUGH 1145 PM CDT...

At 1100 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles east of Grassland Colony to near
Westport to near Richmond Lake Rec Area to 6 miles southwest of
Aberdeen to near Mansfield. Movement was east at 40 mph.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor hail damage to vegetation is
         possible.

Locations impacted include...
Aberdeen, Warner, Mina Lake Rec Area, Bath, Columbia, Westport,
Grassland Colony, Putney, Hutterville Colony, Stratford, Wetonka,
Mina, Barnard, Tacoma Park, North Scatterwood Lake, Richmond Lake Rec
Area, and Sand Lake Wildlife Refuge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Aberdeen.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
north central and northeastern South Dakota.

&&

LAT...LON 4580 9833 4566 9812 4559 9811 4545 9814
      4525 9822 4525 9880 4542 9879 4556 9876
      4563 9878 4570 9887
TIME...MOT...LOC 0400Z 264DEG 33KT 4569 9865 4564 9857 4556 9856 4542
9859 4526 9864

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

TMT

Preliminary Local Storm Report
National Weather Service Aberdeen SD
1123 PM CDT Tue Jul 7 2026

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

1113 PM     Tstm Wnd Gst     Warner                  45.32N 98.50W
07/07/2026  M59 MPH          Brown              SD   Mesonet

            Personal weather station in Warner recorded
            a wind gust of 59 miles per hour.

&&

BC

Preliminary Local Storm Report
National Weather Service Aberdeen SD
1125 PM CDT Tue Jul 7 2026

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

1055 PM     Tstm Wnd Gst     4 ESE Mina              45.41N 98.68W
07/07/2026  M71 MPH          Brown              SD   Mesonet

            Mesonet station AWMS2 Aberdeen 10WSW (SD
            Mesonet).

&&

BC

Preliminary Local Storm Report
National Weather Service Aberdeen SD
1226 AM CDT Wed Jul 8 2026

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

1206 AM     Tstm Wnd Gst     1 WNW Summit            45.31N 97.05W
07/08/2026  M63 MPH          Roberts            SD   Mesonet

            Mesonet station 55 Summit (SDDOT).

&&

BC

Preliminary Local Storm Report
National Weather Service Aberdeen SD
135 AM CDT Wed Jul 8 2026

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

0135 AM     Flood            Aberdeen                45.47N 98.48W
07/08/2026                   Brown              SD   NWS Employee

            Off duty NWS Employee reports numerous spots
            in Aberdeen with standing water over roads
            and some places where water was running over
            roads. Mainly less than 6 inches of standing
            water observed.

&&

NWS ABR