Excessive Heat Warning — Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 10:00 PM Heat Advisory — McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 10:00 PM

Sully County, South Dakota, United States

Last updated: 5:48 PM CDT  ·  Refresh
34°C
Feels like 32°
Clear
▲ 35°  /  ▼ 19°
Wind
13 mph SSE
Humidity
27%
Dew Point
14°
Pressure
28.05 inHg
Visibility
10 mi
UV Index
6.7
Cloud Cover
0%
Sunrise
6:09 AM
Sunset
9:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently clear at 34°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:09AM · Sunset: 9:23PM.

Alerts

Excessive Heat Warning
Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 10:00 PM
Heat Advisory
McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 10:00 PM
46 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
3%
6 PM
35°
8%
7 PM
33°
8%
8 PM
31°
8%
9 PM
27°
8%
10 PM
26°
8%
11 PM
26°
3%
12 AM
24°
3%
1 AM
24°
3%
2 AM
23°
3%
3 AM
22°
3%
4 AM
22°
3%
5 AM
19°
3%
6 AM
19°
3%
7 AM
21°
3%
8 AM
23°
3%
9 AM
24°
3%
10 AM
26°
3%
11 AM
28°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
33°
3%
3 PM
33°
3%
4 PM
33°
3%
7-Day Forecast
Today
35° 19°
Clear.
Thu
37° 19°
Mostly Clear.
Fri
37° 21°
Mostly Clear.
Sat
33° 21°
Mostly Clear.
Sun
38° 20°
Partly Cloudy.
Mon
36° 21°
Drizzle, 50% chance.
Tue
32° 19°
Mostly Clear with a 25% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 34° Clear 3% 13 mph SSE 27%
6 PM 35° Clear 8% 12 mph SE 27%
7 PM 33° Clear 8% 11 mph SE 31%
8 PM 31° Clear 8% 10 mph SE 36%
9 PM 27° Clear 8% 10 mph SE 41%
10 PM 26° Clear 8% 10 mph SE 45%
11 PM 26° Clear 3% 11 mph SE 48%
12 AM 24° Clear 3% 11 mph SE 52%
1 AM 24° Clear 3% 10 mph SE 56%
2 AM 23° Clear 3% 10 mph SSE 60%
3 AM 22° Clear 3% 9 mph SSE 63%
4 AM 22° Clear 3% 9 mph SSE 66%
5 AM 19° Clear 3% 9 mph SSE 68%
6 AM 19° Mostly Clear 3% 9 mph SSE 70%
7 AM 21° Mostly Clear 3% 9 mph SSE 66%
8 AM 23° Partly Cloudy 3% 10 mph S 60%
9 AM 24° Partly Cloudy 3% 10 mph S 53%
10 AM 26° Partly Cloudy 3% 10 mph S 46%
11 AM 28° Partly Cloudy 3% 11 mph S 39%
12 PM 31° Mostly Clear 3% 11 mph S 34%
1 PM 33° Mostly Clear 3% 11 mph S 32%
2 PM 33° Mostly Clear 3% 10 mph S 31%
3 PM 33° Mostly Clear 3% 10 mph S 30%
4 PM 33° Mostly Clear 3% 10 mph SSE 29%
15-Day Forecast
Today
7/15
Clear
8%
19°
35°
Thu
7/16
Mostly Clear
7%
19°
37°
Fri
7/17
Mostly Clear
14%
21°
37°
Sat
7/18
Mostly Clear
17%
21°
33°
Sun
7/19
Partly Cloudy
19%
20°
38°
Mon
7/20
Drizzle
50%
21°
36°
Tue
7/21
Mostly Clear
25%
19°
32°
Wed
7/22
Drizzle
60%
18°
30°
Thu
7/23
Drizzle
60%
18°
33°
Fri
7/24
Drizzle
60%
16°
33°
Sat
7/25
Drizzle
60%
12°
33°
Sun
7/26
Drizzle
60%
20°
33°
Mon
7/27
Drizzle
60%
21°
33°
Tue
7/28
Drizzle
60%
21°
34°
Wed
7/29
Rain
90%
22°
36°
46
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
26 AQI 4.7 µg/m³
O3
Ground-level ozone
Dominant
46 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 46 Good 46 26
Fri 49 Good 49 28
Sat 42 Good 42 23
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 Wed Jul 15, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE44 J/kg
MLCAPE7 J/kg
MUCAPE44 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index2.9
Kinematics
0–6 km Shear19 kt
0–1 km Shear3 kt
Eff. Shear—
0–1 km SRH2
0–3 km SRH-32
Eff. SRH—
Storm Motion180° @ 25 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index22.4
Thermo & Levels
PWAT0.92 in
0–3 km LR8.2 °C/km
700–500 LR4.5 °C/km
Total Totals38.0
LCL713 hPa
LFC950 hPa
EL733 hPa
Freezing Lvl16,440 ft