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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: 5:46 am CDT Jun 28, 2025
 
Overnight

Overnight: A chance of showers and thunderstorms. Some of the storms could be severe.  Cloudy, with a low around 64. South wind around 8 mph.  Chance of precipitation is 50%.
Severe
T-Storms

Saturday

Saturday: A chance of showers and thunderstorms, mainly after 4pm. Some of the storms could be severe.  Cloudy, then gradually becoming mostly sunny, with a high near 85. South southeast wind 8 to 10 mph.  Chance of precipitation is 30%.
Severe
T-Storms

Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 11pm. Some of the storms could be severe.  Partly cloudy, with a low around 66. Northwest wind 6 to 8 mph becoming west southwest after midnight.  Chance of precipitation is 50%.
Severe
T-Storms
then Slight
Chance
T-storms
Sunday

Sunday: A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am.  Partly sunny, with a high near 82. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.
Chance
T-storms then
Partly Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 61. West northwest wind 8 to 10 mph.
Mostly Clear


Monday

Monday: Sunny, with a high near 78. 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 83. West wind around 9 mph.
Sunny


Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 62. West wind around 6 mph becoming south in the evening.  Chance of precipitation is 30%.
Chance
T-storms

Lo 64 °F Hi 85 °F Lo 66 °F Hi 82 °F Lo 61 °F Hi 78 °F Lo 60 °F Hi 83 °F Lo 62 °F

Hazardous Weather Outlook
 

Overnight
 
A chance of showers and thunderstorms. Some of the storms could be severe. Cloudy, with a low around 64. South wind around 8 mph. Chance of precipitation is 50%.
Saturday
 
A chance of showers and thunderstorms, mainly after 4pm. Some of the storms could be severe. Cloudy, then gradually becoming mostly sunny, with a high near 85. South southeast wind 8 to 10 mph. Chance of precipitation is 30%.
Saturday Night
 
A chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 11pm. Some of the storms could be severe. Partly cloudy, with a low around 66. Northwest wind 6 to 8 mph becoming west southwest after midnight. Chance of precipitation is 50%.
Sunday
 
A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am. Partly sunny, with a high near 82. West northwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
 
Mostly clear, with a low around 61. West northwest wind 8 to 10 mph.
Monday
 
Sunny, with a high near 78. 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 83. West wind around 9 mph.
Tuesday Night
 
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 62. West wind around 6 mph becoming south in the evening. Chance of precipitation is 30%.
Wednesday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Wednesday Night
 
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62. Chance of precipitation is 20%.
Thursday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Thursday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 40%.
Independence Day
 
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Sisseton SD.

Weather Forecast Discussion
872
FXUS63 KABR 281050
AFDABR

Area Forecast Discussion
National Weather Service Aberdeen SD
550 AM CDT Sat Jun 28 2025

.KEY MESSAGES...

- Showers/storms (30-60% coverage) early this morning with a low
risk of severe weather.

- SLIGHT RISK (2 of 5) again for this afternoon, east of a line from
Pierre to Aberdeen. Wind and hail are the primary threats,
though can`t rule out a brief tornado in far eastern SD/western MN.

- Another cluster of storms (40-60% coverage) coming up from the
southwest early Sunday morning for central South Dakota before
spreading east through the morning. Low risk of severe weather.

&&

.UPDATE...
Issued at 541 AM CDT Sat Jun 28 2025

Many updates this morning as we have developed widespread light
showers and weak thunderstorms with the wave that is now situated
overhead. The surface low/boundary is also located just to the
northwest of Philip. This placement is a little farther west in
comparison to earlier forecasts and may impact the forecast
location for storms this afternoon. Thats something that may need
redress once the 12Z CAMS become available.

See below for the update to the aviation discussion.

&&

.DISCUSSION...
Issued at 154 AM CDT Sat Jun 28 2025

Cluster of storms in North Dakota threatens the northern CWA if any
of the stronger storms decides to deviate to the right on a 320-340
degree trajectory. Otherwise we just have some weak convection
smattered across the CWA mainly east river. All this is covered by
current POPs. There is the question of whether this will get more
organized overnight and lay down enough outflow to influence the
final location for a surface trough ahead of a low across eastern
South Dakota as a location for re-development later today. The
responsible shortwave is taking its time moving east, so CAMS have
highlighted this area for another round of potential severe weather.
Additionally, another wave, back into  Wyoming will make it into
western South Dakota this evening.  Strongest activity would be out
towards the hills region, however as the wave continues east
northeast elevated convection could be coming into the Missouri
valley towards the morning hours Sunday.

So, for this afternoon, profiles indicate decent mid-level flow of
40kts, though jet level winds are pretty weak with the 200mb jet
over North Dakota. 1/2km winds are about 25kts down in the southeast
CWA before they decouple as a low level jet forms southeast of the
CWA. CAPE is once again up to between 3500-4000j/kg but with only
30kts 0-6 km shear. Thats enough shear for supercell
characteristics, but with westerly mid-levels outflows will also
impact storm mode. And the frontal boundary shifts storms out of the
CWA before the low level jet influences storm mode.

There is the shortwave out west that CAMS have latched onto. Better
shear environment remains to the north, with steeper mid-level lapse
rates up that way, while down into central South Dakota its a weaker
shear/weaker MUCAPE environment. Will probably just end up with
early morning pulse convection in central SD.

An upper level trough sets overhead for Sunday, with weak high
pressure. We get clipped by a backdoor front Monday with a brief
cool down. A broad weak ridge builds in from the west for the middle
of next week, with a series of weak ridge riders keeping POPs in the
forecast mainly for the latter half of next week. No major thermal
anomalies though 700mb temperatures are creeping up towards +14 by
Thursday/Friday.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 541 AM CDT Sat Jun 28 2025

Terminals KABR,KATY,KPIR,KMBG

Mainly VFR conditions, though we have some IFR CIGS lingering
around KATY. Clusters of VFR VISBY/CIG showers early this
morning will also impact terminals. Later today, we have the
greatest potential for afternoon strong thunderstorm activity at
KATY and possibly KPIR/KABR. Additionally, late in the TAF period
we could have a second cluster of storms come out from the west
and impact KPIR and possibly KMBG.

&&

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

$$

UPDATE...07
DISCUSSION...07
AVIATION...07
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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