Extreme Heat Warning — Corson, SD, Campbell, SD, McPherson, SD, Walworth, SD, Edmunds, SD, Dewey, SD, Potter, SD, Faulk, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 9:00 PM Heat Advisory — Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Corson, SD, Campbell, SD, McPherson, SD, Walworth, SD, Edmunds, SD, Dewey, SD, Potter, SD, Faulk, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 9:00 PM

Sully County, South Dakota, United States

Last updated: 8:57 AM CDT  ·  Refresh
27°C
Feels like 28°
Mostly Clear
▲ 38°  /  ▼ 25°
Wind
12 mph S
Humidity
58%
Dew Point
19°
Pressure
27.86 inHg
Visibility
10 mi
UV Index
5.7
Cloud Cover
29%
Sunrise
6:20 AM
Sunset
9:12 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently mostly clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2033 J/kg) — isolated convective development possible. Sunrise: 6:20AM · Sunset: 9:12PM.

Alerts

Extreme Heat Warning
Corson, SD, Campbell, SD, McPherson, SD, Walworth, SD, Edmunds, SD, Dewey, SD, Potter, SD, Faulk, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
Heat Advisory
Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Corson, SD, Campbell, SD, McPherson, SD, Walworth, SD, Edmunds, SD, Dewey, SD, Potter, SD, Faulk, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
43 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
16%
9 AM
26°
31%
10 AM
28°
23%
11 AM
31°
16%
12 PM
32°
7%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
36°
3%
5 PM
37°
3%
6 PM
37°
3%
7 PM
36°
3%
8 PM
33°
3%
9 PM
31°
3%
10 PM
29°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
27°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
26°
3%
6 AM
25°
3%
7 AM
27°
3%
7-Day Forecast
Today
38° 25°
Mostly Clear.
Mon
37° 25°
Partly Cloudy with a 38% chance of rain.
Tue
38° 21°
Clear.
Wed
36° 22°
Clear with a 58% chance of rain.
Thu
31° 19°
Rain, 69% chance.
Fri
32° 16°
Rain, 29% chance.
Sat
32° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 16% 12 mph S 58%
9 AM 26° Clear 31% 11 mph S 53%
10 AM 28° Clear 23% 9 mph SSW 48%
11 AM 31° Clear 16% 6 mph SW 43%
12 PM 32° Clear 7% 6 mph W 38%
1 PM 34° Clear 3% 6 mph NNW 35%
2 PM 35° Mostly Clear 3% 6 mph N 32%
3 PM 36° Mostly Clear 3% 8 mph N 29%
4 PM 36° Mostly Clear 3% 7 mph N 28%
5 PM 37° Clear 3% 7 mph NNE 28%
6 PM 37° Clear 3% 6 mph NNE 27%
7 PM 36° Clear 3% 5 mph NNE 30%
8 PM 33° Mostly Clear 3% 5 mph NE 32%
9 PM 31° Mostly Clear 3% 5 mph NE 33%
10 PM 29° Mostly Clear 3% 5 mph ENE 36%
11 PM 28° Mostly Clear 3% 5 mph NE 40%
12 AM 27° Mostly Clear 3% 6 mph ENE 43%
1 AM 27° Clear 3% 6 mph NE 45%
2 AM 27° Clear 3% 6 mph NE 46%
3 AM 26° Clear 3% 6 mph NE 48%
4 AM 26° Mostly Clear 3% 6 mph NE 48%
5 AM 26° Partly Cloudy 3% 6 mph NE 48%
6 AM 25° Partly Cloudy 3% 6 mph NE 48%
7 AM 27° Partly Cloudy 3% 6 mph ENE 45%
15-Day Forecast
Today
7/26
Mostly Clear
16%
25°
38°
Mon
7/27
Partly Cloudy
38%
25°
37°
Tue
7/28
Clear
7%
21°
38°
Wed
7/29
Clear
58%
22°
36°
Thu
7/30
Rain
69%
19°
31°
Fri
7/31
Rain
29%
16°
32°
Sat
8/1
Clear
17%
17°
32°
Sun
8/2
Drizzle
43%
21°
38°
Mon
8/3
Clear
43%
21°
37°
Tue
8/4
Clear
21%
17°
29°
Wed
8/5
Drizzle
60%
16°
27°
Thu
8/6
Drizzle
60%
18°
28°
Fri
8/7
Drizzle
60%
19°
30°
Sat
8/8
Drizzle
60%
20°
31°
Sun
8/9
Drizzle
60%
19°
30°
43
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
38 AQI 6.9 µg/m³
O3
Ground-level ozone
Dominant
43 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 43 Good 43 38
Tue 54 Moderate 54 49
Wed 64 Moderate 64 54
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 Jul 26, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE690 J/kg
MLCAPE361 J/kg
MUCAPE690 J/kg
SBCIN-806 J/kg
MLCIN0 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear35 kt
0–1 km Shear16 kt
Eff. Shear25 kt
0–1 km SRH106
0–3 km SRH62
Eff. SRH-67
Storm Motion232° @ 32 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.3
STP (eff)0.0
Supercell0.0
K-Index32.3
Thermo & Levels
PWAT1.56 in
0–3 km LR4.8 °C/km
700–500 LR8.1 °C/km
Total Totals50.4
LCL834 hPa
LFC596 hPa
EL237 hPa
Freezing Lvl14,734 ft