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

Stanley County, South Dakota, United States

Last updated: 5:38 PM CDT  ·  Refresh
35°C
Feels like 35°
Mostly Clear
▲ 37°  /  ▼ 19°
Wind
13 mph NNE
Humidity
30%
Dew Point
17°
Pressure
27.81 inHg
Visibility
10 mi
UV Index
7.0
Cloud Cover
11%
Sunrise
5:14 AM
Sunset
8:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Stanley County is currently mostly clear at 35°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1210 J/kg) — isolated convective development possible. Sunrise: 5:14AM · Sunset: 8:23PM.

Alerts

Heat Advisory
Brown, SD, Marshall, SD, Roberts, SD, Walworth, SD, Edmunds, SD, Day, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
47 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
35°
3%
5 PM
36°
16%
6 PM
34°
16%
7 PM
33°
16%
8 PM
31°
16%
9 PM
28°
8%
10 PM
27°
8%
11 PM
26°
3%
12 AM
25°
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
22°
3%
9 AM
24°
3%
10 AM
26°
3%
11 AM
29°
3%
12 PM
30°
3%
1 PM
31°
5%
2 PM
31°
5%
3 PM
32°
6%
7-Day Forecast
Today
37° 19°
Mostly Clear.
Sat
35° 19°
Partly Cloudy with a 22% chance of rain.
Sun
38° 21°
Partly Cloudy.
Mon
37° 22°
Clear.
Tue
29° 18°
Partly Cloudy.
Wed
30° 15°
Drizzle, 60% chance.
Thu
33° 17°
Clear with a 35% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 35° Mostly Clear 3% 13 mph NNE 30%
5 PM 36° Mostly Clear 16% 13 mph NNE 28%
6 PM 34° Mostly Clear 16% 13 mph NNE 32%
7 PM 33° Mostly Clear 16% 12 mph NE 36%
8 PM 31° Mostly Clear 16% 14 mph NNE 40%
9 PM 28° Mostly Clear 8% 14 mph NE 45%
10 PM 27° Mostly Clear 8% 13 mph NE 49%
11 PM 26° Mostly Clear 3% 13 mph NE 53%
12 AM 25° Mostly Clear 3% 13 mph NE 57%
1 AM 24° Mostly Clear 3% 12 mph ENE 61%
2 AM 23° Partly Cloudy 3% 11 mph ENE 65%
3 AM 22° Partly Cloudy 3% 10 mph ENE 69%
4 AM 22° Mostly Clear 3% 10 mph ENE 72%
5 AM 19° Mostly Clear 3% 9 mph ENE 75%
6 AM 19° Mostly Clear 3% 10 mph ENE 71%
7 AM 21° Partly Cloudy 3% 10 mph E 62%
8 AM 22° Partly Cloudy 3% 10 mph E 53%
9 AM 24° Partly Cloudy 3% 10 mph E 45%
10 AM 26° Partly Cloudy 3% 11 mph E 38%
11 AM 29° Partly Cloudy 3% 11 mph E 33%
12 PM 30° Partly Cloudy 3% 11 mph E 30%
1 PM 31° Partly Cloudy 5% 11 mph E 28%
2 PM 31° Partly Cloudy 5% 12 mph E 27%
3 PM 32° Partly Cloudy 6% 12 mph E 26%
15-Day Forecast
Today
7/17
Mostly Clear
16%
19°
37°
Sat
7/18
Partly Cloudy
22%
19°
35°
Sun
7/19
Partly Cloudy
18%
21°
38°
Mon
7/20
Clear
16%
22°
37°
Tue
7/21
Partly Cloudy
19%
18°
29°
Wed
7/22
Drizzle
60%
15°
30°
Thu
7/23
Clear
35%
17°
33°
Fri
7/24
Overcast
60%
19°
33°
Sat
7/25
Drizzle
60%
17°
34°
Sun
7/26
Drizzle
60%
18°
35°
Mon
7/27
Overcast
25%
19°
37°
Tue
7/28
Drizzle
60%
23°
37°
Wed
7/29
Drizzle
60%
22°
36°
Thu
7/30
Drizzle
60%
22°
35°
Fri
7/31
Drizzle
60%
23°
36°
47
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
29 AQI 5.2 µg/m³
O3
Ground-level ozone
Dominant
47 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 47 Good 47 29
Sun 42 Good 42 26
Mon 48 Good 48 32
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 Fri Jul 17, 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
SBCAPE1596 J/kg
MLCAPE1058 J/kg
MUCAPE1596 J/kg
SBCIN0 J/kg
MLCIN-1 J/kg
Lifted Index-5.3
Kinematics
0–6 km Shear18 kt
0–1 km Shear7 kt
Eff. Shear18 kt
0–1 km SRH17
0–3 km SRH10
Eff. SRH10
Storm Motion185° @ 10 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.2
K-Index38.6
Thermo & Levels
PWAT1.59 in
0–3 km LR8.7 °C/km
700–500 LR6.9 °C/km
Total Totals53.1
LCL728 hPa
LFC942 hPa
EL178 hPa
Freezing Lvl14,032 ft