Severe Thunderstorm Warning — Dewey County, SD, Potter County, SD, Sully County, SD 12:45 AM

Sully County, South Dakota, United States

Last updated: 12:14 AM CDT  ·  Refresh
23°C
Feels like 23°
Mostly Cloudy
▲ 31°  /  ▼ 14°
Wind
10 mph E
Humidity
77%
Dew Point
19°
Pressure
27.83 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
60%
Sunrise
6:59 AM
Sunset
8:20 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently mostly cloudy at 23°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1531 J/kg) — isolated convective development possible. Sunrise: 6:59AM · Sunset: 8:20PM.

Alerts

Severe Thunderstorm Warning
Dewey County, SD, Potter County, SD, Sully County, SD
Expires 12:45 AM
43 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
20%
1 AM
22°
10%
2 AM
22°
11%
3 AM
21°
6%
4 AM
21°
5%
5 AM
20°
6%
6 AM
18°
3%
7 AM
18°
3%
8 AM
18°
3%
9 AM
19°
3%
10 AM
21°
3%
11 AM
23°
3%
12 PM
24°
3%
1 PM
25°
3%
2 PM
27°
8%
3 PM
28°
8%
4 PM
29°
20%
5 PM
29°
20%
6 PM
31°
20%
7 PM
29°
21%
8 PM
28°
24%
9 PM
27°
25%
10 PM
24°
12%
11 PM
23°
12%
7-Day Forecast
Today
31° 14°
Partly Cloudy with a 20% chance of rain.
Mon
31° 14°
Mostly Clear.
Tue
27° 17°
Rain, 70% chance.
Wed
34° 14°
Overcast with a 53% chance of rain.
Thu
34° 20°
Clear.
Fri
36° 17°
Rain.
Sat
33° 20°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Cloudy 20% 10 mph E 77%
1 AM 22° Mostly Cloudy 10% 9 mph E 79%
2 AM 22° Partly Cloudy 11% 10 mph ESE 81%
3 AM 21° Partly Cloudy 6% 10 mph ESE 82%
4 AM 21° Mostly Clear 5% 8 mph ESE 84%
5 AM 20° Partly Cloudy 6% 7 mph E 86%
6 AM 18° Mostly Cloudy 3% 8 mph E 88%
7 AM 18° Overcast 3% 8 mph E 88%
8 AM 18° Overcast 3% 7 mph E 85%
9 AM 19° Mostly Cloudy 3% 6 mph E 81%
10 AM 21° Mostly Cloudy 3% 5 mph ENE 76%
11 AM 23° Mostly Cloudy 3% 4 mph NNE 71%
12 PM 24° Mostly Cloudy 3% 4 mph NNW 66%
1 PM 25° Mostly Cloudy 3% 5 mph NW 61%
2 PM 27° Partly Cloudy 8% 6 mph NW 57%
3 PM 28° Partly Cloudy 8% 6 mph WNW 53%
4 PM 29° Clear 20% 7 mph WNW 50%
5 PM 29° Mostly Clear 20% 6 mph WNW 50%
6 PM 31° Mostly Clear 20% 4 mph WNW 50%
7 PM 29° Mostly Clear 21% 5 mph NW 51%
8 PM 28° Partly Cloudy 24% 5 mph NNW 55%
9 PM 27° Partly Cloudy 25% 5 mph N 58%
10 PM 24° Partly Cloudy 12% 5 mph N 62%
11 PM 23° Partly Cloudy 12% 7 mph N 67%
15-Day Forecast
Today
8/30
Partly Cloudy
20%
14°
31°
Mon
8/31
Mostly Clear
14%
14°
31°
Tue
9/1
Rain
70%
17°
27°
Wed
9/2
Overcast
53%
14°
34°
Thu
9/3
Clear
8%
20°
34°
Fri
9/4
Rain
19%
17°
36°
Sat
9/5
Clear
8%
20°
33°
Sun
9/6
Drizzle
43%
16°
34°
Mon
9/7
Drizzle
44%
20°
33°
Tue
9/8
Drizzle
44%
17°
35°
Wed
9/9
Clear
60%
18°
35°
Thu
9/10
Drizzle
60%
17°
28°
Fri
9/11
Drizzle
60%
16°
27°
Sat
9/12
Drizzle
60%
16°
28°
Sun
9/13
Clear
60%
15°
26°
43
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
PM2.5
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. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sun Aug 30, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE768 J/kg
MLCAPE1518 J/kg
MUCAPE2011 J/kg
SBCIN-272 J/kg
MLCIN-169 J/kg
Lifted Index-1.7
Kinematics
0–6 km Shear55 kt
0–1 km Shear17 kt
Eff. Shear64 kt
0–1 km SRH189
0–3 km SRH311
Eff. SRH358
Storm Motion271° @ 25 kt
0–1 km EHI0.9
Composite Parameters
Sig. Tornado0.9
STP (eff)0.7
Supercell21.6
K-Index37.0
Thermo & Levels
PWAT1.68 in
0–3 km LR5.3 °C/km
700–500 LR6.0 °C/km
Total Totals49.8
LCL896 hPa
LFC678 hPa
EL193 hPa
Freezing Lvl13,645 ft