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

Day County, South Dakota, United States

Last updated: 5:36 PM CDT  ·  Refresh
32°C
Feels like 33°
Mostly Clear
▲ 33°  /  ▼ 16°
Wind
10 mph NNW
Humidity
48%
Dew Point
21°
Pressure
28.04 inHg
Visibility
8 mi
UV Index
6.7
Cloud Cover
17%
Sunrise
5:58 AM
Sunset
9:13 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Day County is currently mostly clear at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2657 J/kg) — isolated convective development possible. Sunrise: 5:58AM · Sunset: 9:13PM.

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
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
5%
6 PM
33°
9%
7 PM
31°
20%
8 PM
29°
5%
9 PM
26°
5%
10 PM
25°
3%
11 PM
23°
3%
12 AM
22°
3%
1 AM
22°
3%
2 AM
21°
3%
3 AM
19°
3%
4 AM
19°
3%
5 AM
16°
3%
6 AM
16°
3%
7 AM
18°
3%
8 AM
20°
3%
9 AM
21°
3%
10 AM
22°
3%
11 AM
23°
3%
12 PM
25°
3%
1 PM
27°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
27°
3%
7-Day Forecast
Today
33° 16°
Partly Cloudy.
Sat
30° 16°
Partly Cloudy.
Sun
33° 18°
Partly Cloudy.
Mon
32° 18°
Clear with a 22% chance of rain.
Tue
26° 14°
Clear.
Wed
28° 14°
Clear.
Thu
29° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Mostly Clear 5% 10 mph NNW 48%
6 PM 33° Mostly Clear 9% 12 mph N 46%
7 PM 31° Partly Cloudy 20% 11 mph N 53%
8 PM 29° Partly Cloudy 5% 10 mph NNE 61%
9 PM 26° Partly Cloudy 5% 9 mph NNE 67%
10 PM 25° Mostly Clear 3% 9 mph NE 72%
11 PM 23° Partly Cloudy 3% 9 mph NE 76%
12 AM 22° Partly Cloudy 3% 9 mph NE 80%
1 AM 22° Partly Cloudy 3% 9 mph NE 82%
2 AM 21° Partly Cloudy 3% 8 mph NE 83%
3 AM 19° Partly Cloudy 3% 8 mph NE 85%
4 AM 19° Partly Cloudy 3% 7 mph NE 85%
5 AM 16° Partly Cloudy 3% 7 mph ENE 85%
6 AM 16° Partly Cloudy 3% 6 mph ENE 85%
7 AM 18° Partly Cloudy 3% 7 mph ENE 78%
8 AM 20° Mostly Clear 3% 8 mph ENE 66%
9 AM 21° Mostly Clear 3% 9 mph ENE 54%
10 AM 22° Mostly Clear 3% 8 mph ENE 46%
11 AM 23° Clear 3% 8 mph ENE 41%
12 PM 25° Clear 3% 7 mph ENE 37%
1 PM 27° Clear 3% 7 mph ENE 36%
2 PM 27° Mostly Clear 3% 7 mph ENE 36%
3 PM 27° Mostly Clear 3% 7 mph ENE 35%
4 PM 27° Partly Cloudy 3% 7 mph ENE 37%
15-Day Forecast
Today
7/17
Partly Cloudy
5%
16°
33°
Sat
7/18
Partly Cloudy
3%
16°
30°
Sun
7/19
Partly Cloudy
18%
18°
33°
Mon
7/20
Clear
22%
18°
32°
Tue
7/21
Clear
3%
14°
26°
Wed
7/22
Clear
9%
14°
28°
Thu
7/23
Clear
19%
17°
29°
Fri
7/24
Overcast
60%
17°
30°
Sat
7/25
Drizzle
60%
17°
31°
Sun
7/26
Drizzle
60%
18°
32°
Mon
7/27
Drizzle
60%
16°
33°
Tue
7/28
Drizzle
60%
19°
33°
Wed
7/29
Drizzle
60%
18°
32°
Thu
7/30
Drizzle
60%
18°
32°
Fri
7/31
Drizzle
60%
18°
31°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.6 µg/m³
O3
Ground-level ozone
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 52 Moderate 31 52
Sun 44 Good 27 44
Mon 49 Good 31 49
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 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3061 J/kg
MLCAPE2644 J/kg
MUCAPE3105 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-7.3
Kinematics
0–6 km Shear15 kt
0–1 km Shear3 kt
Eff. Shear20 kt
0–1 km SRH9
0–3 km SRH-3
Eff. SRH-3
Storm Motion230° @ 11 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.8
Thermo & Levels
PWAT1.68 in
0–3 km LR7.5 °C/km
700–500 LR6.6 °C/km
Total Totals51.7
LCL816 hPa
LFC949 hPa
EL153 hPa
Freezing Lvl14,327 ft