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

Grant County, South Dakota, United States

Last updated: 5:18 PM CDT  ·  Refresh
34°C
Feels like 34°
Mostly Clear
▲ 37°  /  ▼ 21°
Wind
9 mph SSE
Humidity
31%
Dew Point
18°
Pressure
28.56 inHg
Visibility
10 mi
UV Index
6.8
Cloud Cover
18%
Sunrise
6:08 AM
Sunset
8:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grant County is currently mostly clear at 34°C. Precipitation is likely — peak probability 81% around 5 PM. Atmospheric instability is elevated (CAPE up to 1796 J/kg) — isolated convective development possible. Sunrise: 6:08AM · Sunset: 8:57PM.

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
34°
4%
6 PM
33°
23%
7 PM
32°
23%
8 PM
29°
23%
9 PM
27°
23%
10 PM
26°
23%
11 PM
26°
21%
12 AM
24°
22%
1 AM
24°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
5%
5 AM
23°
5%
6 AM
21°
5%
7 AM
21°
23%
8 AM
23°
33%
9 AM
24°
41%
10 AM
24°
52%
11 AM
26°
58%
12 PM
27°
63%
1 PM
27°
64%
2 PM
26°
67%
3 PM
24°
68%
4 PM
23°
68%
7-Day Forecast
Today
37° 21°
Mostly Clear with a 23% chance of rain.
Thu
31° 19°
Heavy Rain, 80% chance.
Fri
27° 16°
Partly Cloudy with a 70% chance of rain.
Sat
28° 14°
Clear.
Sun
31° 17°
Partly Cloudy.
Mon
33° 19°
Drizzle, 63% chance.
Tue
26° 13°
Mostly Clear with a 41% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Clear 4% 9 mph SSE 31%
6 PM 33° Partly Cloudy 23% 9 mph SSE 29%
7 PM 32° Partly Cloudy 23% 9 mph SSE 32%
8 PM 29° Partly Cloudy 23% 8 mph SSE 38%
9 PM 27° Partly Cloudy 23% 7 mph SSE 44%
10 PM 26° Mostly Cloudy 23% 7 mph SSE 49%
11 PM 26° Mostly Cloudy 21% 7 mph S 54%
12 AM 24° Mostly Cloudy 22% 8 mph S 59%
1 AM 24° Mostly Cloudy 3% 8 mph S 64%
2 AM 24° Mostly Cloudy 3% 9 mph S 68%
3 AM 23° Mostly Cloudy 3% 10 mph SSW 73%
4 AM 23° Mostly Cloudy 5% 10 mph SSW 77%
5 AM 23° Mostly Cloudy 5% 9 mph SSW 79%
6 AM 21° Overcast 5% 8 mph SSW 81%
7 AM 21° Overcast 23% 8 mph SSW 80%
8 AM 23° Overcast 33% 8 mph SSW 75%
9 AM 24° Overcast 41% 10 mph SSW 70%
10 AM 24° Overcast 52% 10 mph SSW 65%
11 AM 26° Overcast 58% 11 mph SSW 60%
12 PM 27° Overcast 63% 11 mph SSW 55%
1 PM 27° Overcast 64% 11 mph SSW 56%
2 PM 26° Rain 67% 9 mph SSW 66%
3 PM 24° Heavy Rain 68% 8 mph SSW 75%
4 PM 23° Heavy Rain 68% 9 mph S 83%
15-Day Forecast
Today
7/29
Mostly Clear
23%
21°
37°
Thu
7/30
Heavy Rain
80%
19°
31°
Fri
7/31
Partly Cloudy
70%
16°
27°
Sat
8/1
Clear
3%
14°
28°
Sun
8/2
Partly Cloudy
8%
17°
31°
Mon
8/3
Drizzle
63%
19°
33°
Tue
8/4
Mostly Clear
41%
13°
26°
Wed
8/5
Clear
43%
12°
27°
Thu
8/6
Clear
44%
13°
29°
Fri
8/7
Drizzle
51%
17°
31°
Sat
8/8
Drizzle
60%
13°
30°
Sun
8/9
Drizzle
60%
17°
28°
Mon
8/10
Drizzle
60%
17°
28°
Tue
8/11
Drizzle
60%
18°
29°
Wed
8/12
Drizzle
60%
18°
30°
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 13.2 µg/m³
O3
Ground-level ozone
46 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 58 Moderate 46 58
Fri 55 Moderate 44 55
Sat 58 Moderate 40 58
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1505 J/kg
MLCAPE1563 J/kg
MUCAPE1779 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-4.7
Kinematics
0–6 km Shear26 kt
0–1 km Shear3 kt
Eff. Shear27 kt
0–1 km SRH15
0–3 km SRH-13
Eff. SRH-13
Storm Motion247° @ 16 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.6
Thermo & Levels
PWAT1.50 in
0–3 km LR8.5 °C/km
700–500 LR6.1 °C/km
Total Totals50.7
LCL770 hPa
LFC967 hPa
EL208 hPa
Freezing Lvl13,940 ft