Sully County, South Dakota, United States

Last updated: 11:47 PM CDT · Refresh

24°C

Feels like 23°

Mostly Cloudy

▲ 32° / ▼ 18°

Wind

10 mph E

Humidity

75%

Dew Point

19°

Pressure

27.83 inHg

Visibility

10 mi

UV Index

0.0

Cloud Cover

69%

Sunrise

6:59 AM

Sunset

8:22 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently mostly cloudy at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1615 J/kg) — isolated convective development possible. Sunrise: 6:59AM · Sunset: 8:22PM.

43 AQI · Good Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

24°

25%

12 AM

23°

17%

1 AM

22°

18%

2 AM

21°

18%

3 AM

21°

19%

4 AM

21°

10%

5 AM

18°

6 AM

18°

7 AM

18°

8 AM

19°

9 AM

21°

10 AM

22°

11 AM

23°

12 PM

24°

1 PM

27°

2 PM

28°

3 PM

29°

4 PM

29°

20%

5 PM

31°

20%

6 PM

30°

21%

7 PM

29°

24%

8 PM

28°

25%

9 PM

25°

25%

10 PM

24°

12%

7-Day Forecast

Tonight

32° 18°

Mostly Cloudy with a 29% chance of rain.

Sun

31° 18°

Partly Cloudy with a 20% chance of rain.

Mon

31° 14°

Mostly Clear.

Tue

27° 17°

Rain, 83% chance.

Wed

34° 14°

Overcast with a 24% chance of rain.

Thu

35° 21°

Clear.

Fri

35° 16°

Clear.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 24° Mostly Cloudy 25% 10 mph E 75%

12 AM 23° Overcast 17% 9 mph E 76%

1 AM 22° Mostly Cloudy 18% 9 mph ESE 78%

2 AM 21° Partly Cloudy 18% 9 mph ESE 80%

3 AM 21° Mostly Clear 19% 9 mph ESE 82%

4 AM 21° Partly Cloudy 10% 8 mph ESE 83%

5 AM 18° Mostly Cloudy 7% 8 mph E 85%

6 AM 18° Overcast 3% 8 mph E 86%

7 AM 18° Overcast 3% 8 mph E 84%

8 AM 19° Mostly Cloudy 3% 7 mph ENE 81%

9 AM 21° Mostly Cloudy 3% 6 mph ENE 78%

10 AM 22° Mostly Cloudy 3% 4 mph ENE 73%

11 AM 23° Partly Cloudy 3% 4 mph NNE 68%

12 PM 24° Partly Cloudy 3% 5 mph NNW 63%

1 PM 27° Partly Cloudy 8% 5 mph NW 59%

2 PM 28° Partly Cloudy 8% 6 mph WNW 55%

3 PM 29° Mostly Clear 8% 6 mph WNW 51%

4 PM 29° Mostly Clear 20% 6 mph WNW 50%

5 PM 31° Partly Cloudy 20% 5 mph WNW 49%

6 PM 30° Partly Cloudy 21% 5 mph NW 49%

7 PM 29° Partly Cloudy 24% 5 mph NW 52%

8 PM 28° Partly Cloudy 25% 6 mph N 56%

9 PM 25° Partly Cloudy 25% 6 mph NNE 60%

10 PM 24° Partly Cloudy 12% 7 mph NNE 64%

15-Day Forecast

Today

8/29

Mostly Cloudy

29%

18°

32°

Sun

8/30

Partly Cloudy

20%

18°

31°

Mon

8/31

Mostly Clear

14°

31°

Tue

9/1

Rain

83%

17°

27°

Wed

9/2

Overcast

24%

14°

34°

Thu

9/3

Clear

21°

35°

Fri

9/4

Clear

19%

16°

35°

Sat

9/5

Clear

17%

18°

34°

Sun

9/6

Drizzle

68%

16°

31°

Mon

9/7

Drizzle

44%

16°

34°

Tue

9/8

Drizzle

36%

19°

36°

Wed

9/9

Drizzle

60%

18°

36°

Thu

9/10

Drizzle

60%

17°

28°

Fri

9/11

Drizzle

60%

16°

27°

Sat

9/12

Drizzle

60%

16°

28°

Good

U.S. Air Quality Index · Dominant: PM2.5

50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

Dominant

43 AQI 7.9 µg/m³

O₃

Ground-level ozone

37 AQI 41 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 43 Good 37 43

Mon 53 Moderate 36 53

Tue 55 Moderate 43 55

About the Air Quality Index

0–50 Good

51–100 Moderate

101–150 Unhealthy for Sensitive Groups

151–200 Unhealthy

201–300 Very Unhealthy

301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Sun Aug 30, 03:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE907 J/kg

MLCAPE1657 J/kg

MUCAPE2158 J/kg

SBCIN-283 J/kg

MLCIN-170 J/kg

Lifted Index-2.4

Kinematics

0–6 km Shear51 kt

0–1 km Shear18 kt

Eff. Shear61 kt

0–1 km SRH172

0–3 km SRH310

Eff. SRH352

Storm Motion270° @ 23 kt

0–1 km EHI1.0

Composite Parameters

Sig. Tornado0.9

STP (eff)0.8

Supercell22.8

K-Index38.2

Thermo & Levels

PWAT1.74 in

0–3 km LR5.3 °C/km

700–500 LR6.5 °C/km

Total Totals51.1

LCL886 hPa

LFC668 hPa

EL189 hPa

Freezing Lvl13,491 ft

Sully County, South Dakota, United States

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