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

Marshall County, South Dakota, United States

Last updated: 5:17 PM CDT  ·  Refresh
34°C
Feels like 34°
Mostly Clear
▲ 36°  /  ▼ 21°
Wind
10 mph S
Humidity
36%
Dew Point
19°
Pressure
28.24 inHg
Visibility
10 mi
UV Index
6.9
Cloud Cover
17%
Sunrise
6:10 AM
Sunset
9:02 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently mostly clear at 34°C. Precipitation is likely — peak probability 90% around 5 PM. Atmospheric instability is elevated (CAPE up to 1858 J/kg) — isolated convective development possible. Sunrise: 6:10AM · Sunset: 9:02PM.

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
60 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
3%
6 PM
33°
21%
7 PM
32°
21%
8 PM
31°
21%
9 PM
29°
21%
10 PM
27°
23%
11 PM
26°
23%
12 AM
26°
24%
1 AM
25°
5%
2 AM
26°
13%
3 AM
24°
13%
4 AM
24°
22%
5 AM
24°
22%
6 AM
21°
23%
7 AM
21°
31%
8 AM
22°
43%
9 AM
23°
43%
10 AM
23°
59%
11 AM
24°
64%
12 PM
25°
68%
1 PM
25°
76%
2 PM
24°
80%
3 PM
24°
80%
4 PM
23°
80%
7-Day Forecast
Today
36° 21°
Partly Cloudy with a 23% chance of rain.
Thu
29° 18°
Heavy Rain, 90% chance.
Fri
28° 16°
Partly Cloudy with a 42% chance of rain.
Sat
29° 14°
Clear.
Sun
33° 17°
Mostly Clear.
Mon
33° 18°
Rain, 78% chance.
Tue
26° 12°
Partly Cloudy with a 28% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Clear 3% 10 mph S 36%
6 PM 33° Partly Cloudy 21% 9 mph S 31%
7 PM 32° Partly Cloudy 21% 9 mph S 32%
8 PM 31° Partly Cloudy 21% 9 mph S 37%
9 PM 29° Mostly Cloudy 21% 9 mph SSE 42%
10 PM 27° Mostly Cloudy 23% 10 mph SSE 46%
11 PM 26° Mostly Cloudy 23% 11 mph S 49%
12 AM 26° Mostly Cloudy 24% 12 mph S 51%
1 AM 25° Mostly Cloudy 5% 13 mph S 54%
2 AM 26° Mostly Cloudy 13% 13 mph S 60%
3 AM 24° Mostly Cloudy 13% 13 mph S 65%
4 AM 24° Mostly Cloudy 22% 12 mph S 70%
5 AM 24° Mostly Cloudy 22% 12 mph S 74%
6 AM 21° Mostly Cloudy 23% 12 mph S 78%
7 AM 21° Mostly Cloudy 31% 12 mph SSW 80%
8 AM 22° Mostly Cloudy 43% 11 mph SSW 75%
9 AM 23° Overcast 43% 9 mph SSW 70%
10 AM 23° Overcast 59% 9 mph SSW 66%
11 AM 24° Overcast 64% 9 mph SSW 63%
12 PM 25° Mostly Cloudy 68% 9 mph SSW 61%
1 PM 25° Rain 76% 9 mph SSW 62%
2 PM 24° Rain 80% 8 mph S 69%
3 PM 24° Heavy Rain 80% 8 mph S 76%
4 PM 23° Heavy Rain 80% 9 mph SSE 81%
15-Day Forecast
Today
7/29
Partly Cloudy
23%
21°
36°
Thu
7/30
Heavy Rain
90%
18°
29°
Fri
7/31
Partly Cloudy
42%
16°
28°
Sat
8/1
Clear
16%
14°
29°
Sun
8/2
Mostly Clear
8%
17°
33°
Mon
8/3
Rain
78%
18°
33°
Tue
8/4
Partly Cloudy
28%
12°
26°
Wed
8/5
Clear
18%
11°
27°
Thu
8/6
Clear
25%
13°
30°
Fri
8/7
Drizzle
51%
17°
31°
Sat
8/8
Drizzle
51%
12°
31°
Sun
8/9
Drizzle
60%
17°
29°
Mon
8/10
Drizzle
60%
17°
29°
Tue
8/11
Drizzle
60%
18°
31°
Wed
8/12
Clear
60%
18°
31°
60
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
60 AQI 14.2 µg/m³
O3
Ground-level ozone
48 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 60 Moderate 48 60
Fri 52 Moderate 43 52
Sat 55 Moderate 43 55
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
SBCAPE1852 J/kg
MLCAPE1976 J/kg
MUCAPE2166 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.6
Kinematics
0–6 km Shear25 kt
0–1 km Shear3 kt
Eff. Shear25 kt
0–1 km SRH15
0–3 km SRH-17
Eff. SRH-17
Storm Motion253° @ 18 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.3
Thermo & Levels
PWAT1.41 in
0–3 km LR8.5 °C/km
700–500 LR6.4 °C/km
Total Totals52.1
LCL769 hPa
LFC956 hPa
EL195 hPa
Freezing Lvl14,111 ft