Heat Advisory — McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Clark, SD, Grant, SD, Deuel, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, 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: 6:18 PM CDT  ·  Refresh
33°C
Feels like 32°
Mostly Clear
▲ 36°  /  ▼ 20°
Wind
10 mph S
Humidity
32%
Dew Point
18°
Pressure
28.01 inHg
Visibility
10 mi
UV Index
5.5
Cloud Cover
21%
Sunrise
6:11 AM
Sunset
9:01 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Day County is currently mostly clear at 33°C. Precipitation is likely — peak probability 81% around 2 PM. Atmospheric instability is elevated (CAPE up to 1624 J/kg) — isolated convective development possible. Sunrise: 6:11AM · Sunset: 9:01PM.

Alerts

Heat Advisory
McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Clark, SD, Grant, SD, Deuel, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
58 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
11%
7 PM
32°
27%
8 PM
30°
27%
9 PM
28°
20%
10 PM
27°
21%
11 PM
26°
21%
12 AM
25°
21%
1 AM
24°
4%
2 AM
25°
12%
3 AM
24°
22%
4 AM
24°
31%
5 AM
23°
31%
6 AM
20°
31%
7 AM
20°
34%
8 AM
22°
54%
9 AM
23°
54%
10 AM
23°
66%
11 AM
24°
70%
12 PM
24°
80%
1 PM
24°
80%
2 PM
24°
80%
3 PM
23°
77%
4 PM
23°
72%
5 PM
22°
72%
7-Day Forecast
Tonight
36° 20°
Mostly Clear with a 20% chance of rain.
Thu
28° 18°
Heavy Rain, 80% chance.
Fri
28° 17°
Partly Cloudy with a 44% chance of rain.
Sat
30° 16°
Clear.
Sun
33° 18°
Clear.
Mon
34° 18°
Rain, 73% chance.
Tue
26° 13°
Partly Cloudy with a 63% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Clear 11% 10 mph S 32%
7 PM 32° Partly Cloudy 27% 10 mph S 31%
8 PM 30° Partly Cloudy 27% 8 mph S 36%
9 PM 28° Partly Cloudy 20% 8 mph SSE 42%
10 PM 27° Mostly Cloudy 21% 8 mph SSE 46%
11 PM 26° Mostly Cloudy 21% 9 mph SSE 50%
12 AM 25° Mostly Cloudy 21% 10 mph SSE 54%
1 AM 24° Mostly Cloudy 4% 11 mph SSE 59%
2 AM 25° Mostly Cloudy 12% 11 mph S 64%
3 AM 24° Mostly Cloudy 22% 11 mph S 69%
4 AM 24° Mostly Cloudy 31% 10 mph S 74%
5 AM 23° Mostly Cloudy 31% 9 mph S 78%
6 AM 20° Mostly Cloudy 31% 8 mph S 83%
7 AM 20° Mostly Cloudy 34% 9 mph S 84%
8 AM 22° Mostly Cloudy 54% 10 mph S 77%
9 AM 23° Overcast 54% 10 mph SSW 70%
10 AM 23° Overcast 66% 11 mph SSW 66%
11 AM 24° Overcast 70% 11 mph SSW 66%
12 PM 24° Heavy Rain 80% 11 mph SSW 66%
1 PM 24° Heavy Rain 80% 10 mph SSW 68%
2 PM 24° Overcast 80% 8 mph SSW 74%
3 PM 23° Overcast 77% 9 mph S 80%
4 PM 23° Overcast 72% 9 mph SSE 84%
5 PM 22° Overcast 72% 9 mph SSE 86%
15-Day Forecast
Today
7/29
Mostly Clear
20%
20°
36°
Thu
7/30
Heavy Rain
80%
18°
28°
Fri
7/31
Partly Cloudy
44%
17°
28°
Sat
8/1
Clear
5%
16°
30°
Sun
8/2
Clear
3%
18°
33°
Mon
8/3
Rain
73%
18°
34°
Tue
8/4
Partly Cloudy
63%
13°
26°
Wed
8/5
Clear
8%
12°
27°
Thu
8/6
Clear
34%
14°
29°
Fri
8/7
Rain
54%
16°
31°
Sat
8/8
Rain
44%
14°
28°
Sun
8/9
Clear
60%
17°
29°
Mon
8/10
Drizzle
60%
17°
28°
Tue
8/11
Drizzle
60%
18°
30°
Wed
8/12
Drizzle
60%
18°
31°
58
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
58 AQI 13.1 µg/m³
O3
Ground-level ozone
47 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 58 Moderate 47 58
Fri 52 Moderate 44 52
Sat 57 Moderate 42 57
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 29, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1423 J/kg
MLCAPE1376 J/kg
MUCAPE1506 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.8
Kinematics
0–6 km Shear24 kt
0–1 km Shear5 kt
Eff. Shear24 kt
0–1 km SRH22
0–3 km SRH-15
Eff. SRH-15
Storm Motion249° @ 17 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.4
Thermo & Levels
PWAT1.33 in
0–3 km LR8.3 °C/km
700–500 LR6.5 °C/km
Total Totals52.0
LCL759 hPa
LFC949 hPa
EL211 hPa
Freezing Lvl13,990 ft