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

Corson County, South Dakota, United States

Last updated: 5:18 PM CDT  ·  Refresh
37°C
Feels like 37°
Partly Cloudy
▲ 38°  /  ▼ 18°
Wind
16 mph SSE
Humidity
24%
Dew Point
14°
Pressure
27.75 inHg
Visibility
10 mi
UV Index
6.7
Cloud Cover
46%
Sunrise
5:24 AM
Sunset
8:16 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Corson County is currently partly cloudy at 37°C. Precipitation is likely — peak probability 70% around 9 PM. Atmospheric instability is elevated (CAPE up to 1390 J/kg) — isolated convective development possible. Sunrise: 5:24AM · Sunset: 8:16PM.

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
64 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
12%
5 PM
37°
30%
6 PM
36°
30%
7 PM
33°
35%
8 PM
30°
41%
9 PM
27°
69%
10 PM
26°
61%
11 PM
26°
64%
12 AM
25°
52%
1 AM
23°
61%
2 AM
22°
52%
3 AM
22°
60%
4 AM
21°
64%
5 AM
18°
60%
6 AM
18°
35%
7 AM
19°
42%
8 AM
19°
60%
9 AM
22°
64%
10 AM
23°
65%
11 AM
25°
42%
12 PM
26°
49%
1 PM
27°
60%
2 PM
28°
60%
3 PM
28°
65%
7-Day Forecast
Today
38° 18°
Mostly Cloudy with a 61% chance of rain.
Thu
33° 18°
Mostly Cloudy with a 66% chance of rain.
Fri
32° 15°
Clear.
Sat
34° 14°
Clear.
Sun
39° 19°
Clear.
Mon
33° 18°
Partly Cloudy with a 25% chance of rain.
Tue
27° 11°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Partly Cloudy 12% 16 mph SSE 24%
5 PM 37° Mostly Cloudy 30% 15 mph SSE 23%
6 PM 36° Mostly Cloudy 30% 14 mph SSE 27%
7 PM 33° Mostly Cloudy 35% 11 mph SSE 36%
8 PM 30° Mostly Cloudy 41% 10 mph SE 48%
9 PM 27° Heavy Rain 69% 11 mph SE 55%
10 PM 26° Rain 61% 11 mph SSE 54%
11 PM 26° Mostly Cloudy 64% 11 mph SE 54%
12 AM 25° Mostly Cloudy 52% 9 mph ESE 57%
1 AM 23° Mostly Cloudy 61% 8 mph ENE 65%
2 AM 22° Overcast 52% 8 mph NE 71%
3 AM 22° Overcast 60% 9 mph ENE 77%
4 AM 21° Rain 64% 9 mph E 81%
5 AM 18° Rain 60% 11 mph ESE 85%
6 AM 18° Rain 35% 11 mph ESE 88%
7 AM 19° Rain 42% 8 mph ESE 86%
8 AM 19° Rain 60% 6 mph ESE 83%
9 AM 22° Rain 64% 6 mph SE 80%
10 AM 23° Mostly Cloudy 65% 4 mph SE 71%
11 AM 25° Partly Cloudy 42% 5 mph SE 62%
12 PM 26° Partly Cloudy 49% 5 mph SE 56%
1 PM 27° Partly Cloudy 60% 5 mph E 54%
2 PM 28° Partly Cloudy 60% 6 mph E 52%
3 PM 28° Partly Cloudy 65% 7 mph ENE 51%
15-Day Forecast
Today
7/29
Mostly Cloudy
61%
18°
38°
Thu
7/30
Mostly Cloudy
66%
18°
33°
Fri
7/31
Clear
14%
15°
32°
Sat
8/1
Clear
7%
14°
34°
Sun
8/2
Clear
3%
19°
39°
Mon
8/3
Partly Cloudy
25%
18°
33°
Tue
8/4
Clear
17%
11°
27°
Wed
8/5
Mostly Clear
22%
11°
28°
Thu
8/6
Partly Cloudy
18%
14°
31°
Fri
8/7
Clear
51%
17°
33°
Sat
8/8
Drizzle
60%
11°
32°
Sun
8/9
Drizzle
60%
18°
31°
Mon
8/10
Drizzle
60%
18°
31°
Tue
8/11
Drizzle
60%
19°
32°
Wed
8/12
Drizzle
60%
19°
33°
64
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
64 AQI 16.0 µg/m³
O3
Ground-level ozone
48 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 64 Moderate 48 64
Fri 60 Moderate 44 60
Sat 60 Moderate 45 60
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, 21:00'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
SBCAPE1049 J/kg
MLCAPE1069 J/kg
MUCAPE1181 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.3
Kinematics
0–6 km Shear27 kt
0–1 km Shear3 kt
Eff. Shear26 kt
0–1 km SRH13
0–3 km SRH-15
Eff. SRH-15
Storm Motion216° @ 21 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index40.1
Thermo & Levels
PWAT1.34 in
0–3 km LR9.4 °C/km
700–500 LR7.2 °C/km
Total Totals55.0
LCL674 hPa
LFC940 hPa
EL226 hPa
Freezing Lvl14,117 ft