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

Dewey County, South Dakota, United States

Last updated: 12:27 AM CDT  ·  Refresh
23°C
Feels like 23°
Overcast
▲ 33°  /  ▼ 18°
Wind
10 mph ESE
Humidity
76%
Dew Point
19°
Pressure
27.62 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
92%
Sunrise
6:00 AM
Sunset
7:25 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Dewey County is currently overcast at 23°C. Precipitation is likely — peak probability 60% around 11 PM. Atmospheric instability is elevated (CAPE up to 1722 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 7:25PM.

Alerts

Severe Thunderstorm Warning
Dewey County, SD, Potter County, SD, Sully County, SD
Expires 12:45 AM
46 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
60%
12 AM
23°
48%
1 AM
22°
30%
2 AM
21°
27%
3 AM
21°
26%
4 AM
20°
27%
5 AM
18°
19%
6 AM
18°
23%
7 AM
19°
22%
8 AM
19°
27%
9 AM
21°
26%
10 AM
22°
26%
11 AM
23°
26%
12 PM
24°
31%
1 PM
26°
40%
2 PM
27°
21%
3 PM
28°
23%
4 PM
28°
29%
5 PM
30°
35%
6 PM
29°
35%
7 PM
27°
39%
8 PM
25°
39%
9 PM
22°
31%
10 PM
21°
31%
7-Day Forecast
Tonight
33° 18°
Overcast with a 60% chance of rain.
Sun
31° 18°
Mostly Cloudy with a 35% chance of rain.
Mon
32° 13°
Mostly Clear.
Tue
28° 17°
Rain, 70% chance.
Wed
34° 15°
Overcast with a 22% chance of rain.
Thu
34° 20°
Clear.
Fri
36° 18°
Rain.
TimeTempConditionsPrecipWindHumidity
Now 23° Overcast 60% 10 mph ESE 76%
12 AM 23° Mostly Cloudy 48% 9 mph ESE 76%
1 AM 22° Partly Cloudy 30% 9 mph E 80%
2 AM 21° Partly Cloudy 27% 8 mph ENE 84%
3 AM 21° Partly Cloudy 26% 9 mph ENE 87%
4 AM 20° Mostly Cloudy 27% 9 mph ENE 88%
5 AM 18° Haze 19% 8 mph ENE 91%
6 AM 18° Mostly Cloudy 23% 7 mph ENE 90%
7 AM 19° Mostly Cloudy 22% 6 mph ENE 87%
8 AM 19° Mostly Cloudy 27% 6 mph NE 84%
9 AM 21° Mostly Cloudy 26% 6 mph NE 80%
10 AM 22° Mostly Cloudy 26% 6 mph NNE 76%
11 AM 23° Overcast 26% 5 mph NNE 72%
12 PM 24° Mostly Cloudy 31% 4 mph NNE 68%
1 PM 26° Mostly Cloudy 40% 3 mph N 64%
2 PM 27° Mostly Cloudy 21% 4 mph NNW 59%
3 PM 28° Partly Cloudy 23% 3 mph NW 56%
4 PM 28° Partly Cloudy 29% 3 mph WSW 54%
5 PM 30° Partly Cloudy 35% 4 mph SSW 53%
6 PM 29° Partly Cloudy 35% 4 mph W 56%
7 PM 27° Partly Cloudy 39% 6 mph NW 64%
8 PM 25° Mostly Cloudy 39% 11 mph NNW 70%
9 PM 22° Mostly Cloudy 31% 13 mph NNW 75%
10 PM 21° Mostly Cloudy 31% 11 mph NNW 76%
15-Day Forecast
Today
8/29
Overcast
60%
18°
33°
Sun
8/30
Mostly Cloudy
35%
18°
31°
Mon
8/31
Mostly Clear
3%
13°
32°
Tue
9/1
Rain
70%
17°
28°
Wed
9/2
Overcast
22%
15°
34°
Thu
9/3
Clear
8%
20°
34°
Fri
9/4
Rain
19%
18°
36°
Sat
9/5
Clear
19%
21°
34°
Sun
9/6
Drizzle
44%
18°
35°
Mon
9/7
Drizzle
44%
21°
33°
Tue
9/8
Clear
44%
18°
36°
Wed
9/9
Clear
60%
17°
36°
Thu
9/10
Drizzle
60%
16°
28°
Fri
9/11
Drizzle
60%
16°
27°
Sat
9/12
Drizzle
60%
15°
28°
46
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
46 AQI 8.3 µg/m³
O3
Ground-level ozone
41 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 46 Good 41 46
Mon 51 Moderate 39 51
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
SBCAPE689 J/kg
MLCAPE1129 J/kg
MUCAPE1480 J/kg
SBCIN-193 J/kg
MLCIN-141 J/kg
Lifted Index-2.0
Kinematics
0–6 km Shear46 kt
0–1 km Shear10 kt
Eff. Shear46 kt
0–1 km SRH80
0–3 km SRH151
Eff. SRH151
Storm Motion289° @ 17 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.3
STP (eff)0.4
Supercell5.3
K-Index39.1
Thermo & Levels
PWAT1.82 in
0–3 km LR5.8 °C/km
700–500 LR6.0 °C/km
Total Totals49.3
LCL882 hPa
LFC695 hPa
EL199 hPa
Freezing Lvl12,995 ft