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Sisseton, South Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Sisseton SD
National Weather Service Forecast for: Sisseton SD
Issued by: National Weather Service Aberdeen, SD
Updated: 7:17 pm CDT Jun 28, 2025
 
Tonight

Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 5am. Some of the storms could be severe.  Partly cloudy, with a low around 67. Calm wind becoming south southwest around 6 mph after midnight.  Chance of precipitation is 40%.
Severe
T-Storms

Sunday

Sunday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 82. West northwest wind 8 to 11 mph.  Chance of precipitation is 30%.
Chance
Showers then
Mostly Sunny
Sunday
Night
Sunday Night: Mostly clear, with a low around 62. West wind 6 to 9 mph.
Mostly Clear

Monday

Monday: Sunny, with a high near 77. West northwest wind 11 to 18 mph, with gusts as high as 28 mph.
Sunny

Monday
Night
Monday Night: Mostly clear, with a low around 60. West wind 7 to 13 mph, with gusts as high as 21 mph.
Mostly Clear

Tuesday

Tuesday: Sunny, with a high near 82. West northwest wind around 9 mph.
Sunny

Tuesday
Night
Tuesday Night: A slight chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 62. South southwest wind around 6 mph.  Chance of precipitation is 20%.
Mostly Clear
then Slight
Chance
T-storms
Wednesday

Wednesday: A slight chance of showers and thunderstorms after 1pm.  Sunny, with a high near 83. Southwest wind 6 to 10 mph becoming east northeast in the afternoon.  Chance of precipitation is 20%.
Sunny then
Slight Chance
T-storms
Wednesday
Night
Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 62. East northeast wind 7 to 10 mph becoming southeast after midnight.  Chance of precipitation is 20%.
Slight Chance
T-storms

Lo 67 °F Hi 82 °F Lo 62 °F Hi 77 °F Lo 60 °F Hi 82 °F Lo 62 °F Hi 83 °F Lo 62 °F

Hazardous Weather Outlook
Tornado Watch
 

Tonight
 
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 5am. Some of the storms could be severe. Partly cloudy, with a low around 67. Calm wind becoming south southwest around 6 mph after midnight. Chance of precipitation is 40%.
Sunday
 
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Mostly cloudy, then gradually becoming sunny, with a high near 82. West northwest wind 8 to 11 mph. Chance of precipitation is 30%.
Sunday Night
 
Mostly clear, with a low around 62. West wind 6 to 9 mph.
Monday
 
Sunny, with a high near 77. West northwest wind 11 to 18 mph, with gusts as high as 28 mph.
Monday Night
 
Mostly clear, with a low around 60. West wind 7 to 13 mph, with gusts as high as 21 mph.
Tuesday
 
Sunny, with a high near 82. West northwest wind around 9 mph.
Tuesday Night
 
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 62. South southwest wind around 6 mph. Chance of precipitation is 20%.
Wednesday
 
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 83. Southwest wind 6 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 20%.
Wednesday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 62. East northeast wind 7 to 10 mph becoming southeast after midnight. Chance of precipitation is 20%.
Thursday
 
Mostly sunny, with a high near 85.
Thursday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Independence Day
 
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Friday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Saturday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Sisseton SD.

Weather Forecast Discussion
933
FXUS63 KABR 282030
AFDABR

Area Forecast Discussion
National Weather Service Aberdeen SD
330 PM CDT Sat Jun 28 2025

.KEY MESSAGES...

- SLIGHT RISK (2 of 5) again for today and tonight. Wind and hail
are the primary threats, though can`t rule out a brief tornado in
far eastern SD/western MN.

- Two rounds of storms are expected in the slight risk. The first
will develop late this afternoon in eastern SD/west central MN. The
second will move in from the west late this evening and progress
east through Sunday morning.

&&

.DISCUSSION...
Issued at 330 PM CDT Sat Jun 28 2025

A front is draped southwest to northeast across the forecast area
this afternoon, stretching from south central SD to around Sisseton.
Areas along and east of this forcing mechanism will be in the
crosshairs for severe storms this evening. Hi-res CAMS are pointing
to a start time of 22z around the Sisseton hills. 35 kts of bulk
shear and 3000 to 4500 J/kg MUCAPE with no significant cap (+10-
+12C) provide a decent set up for discrete cells with hail and wind.
Low level helicity increases toward 1z across east central SD and
west central MN with an STP of 1 to 2 on the RAP13, so can`t rule
out a tornado or two either as bulk shear increases to 45 kts.

Another round of thunderstorms moves in from the west and southwest
around 5z. This looks to be mostly post frontal with an agitated
shortwave trough. With 40 to 50 kts of bulk shear and 2000 to 3000
J/kg of CAPE in central SD at the time convection, the potential for
strong to severe hail and wind gusts exists through the night.

The other concern will be the potential for flooding across the east
and Jones/Lyman county where antecedent conditions have left wet
soils and creeks near bankfull.

The shortwave trough exits Sunday morning with weak sfc high
pressure building in behind it. However, another shortwave trough
moves through Sunday night with an upper trough/backdoor cold front
that could set off some showers through Monday morning.



&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
Issued at 1217 PM CDT Sat Jun 28 2025

Terminals KABR,KATY,KPIR,KMBG

Added and adjusted prob30 groups for all taf sites with potential
for showers and thunderstorms ramping up again after 21z and
continuing into Sunday morning. KATY has the highest chance of
seeing severe storms between 22z and 02z. Future adjustments will
likely be needed. Vsby/cigs may fall to MVFR in heavier rain.


&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
&&

$$

DISCUSSION...20
AVIATION...20
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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