Excessive Heat Warning — Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 10:00 PM Heat Advisory — McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 10:00 PM

Marshall County, South Dakota, United States

Last updated: 5:05 PM CDT  ·  Refresh
32°C
Feels like 32°
Clear
▲ 33°  /  ▼ 21°
Wind
9 mph SE
Humidity
41%
Dew Point
18°
Pressure
28.41 inHg
Visibility
9 mi
UV Index
7.4
Cloud Cover
5%
Sunrise
5:55 AM
Sunset
9:16 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently clear at 32°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 907 J/kg) — isolated convective development possible. Sunrise: 5:55AM · Sunset: 9:16PM.

Alerts

Excessive Heat Warning
Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 10:00 PM
Heat Advisory
McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Faulk, SD, Spink, SD, Grant, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 10:00 PM
36 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
32°
3%
6 PM
33°
3%
7 PM
32°
3%
8 PM
31°
3%
9 PM
29°
3%
10 PM
26°
3%
11 PM
26°
3%
12 AM
24°
3%
1 AM
24°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
22°
3%
6 AM
21°
3%
7 AM
21°
3%
8 AM
23°
3%
9 AM
24°
3%
10 AM
25°
3%
11 AM
26°
3%
12 PM
28°
3%
1 PM
29°
3%
2 PM
29°
3%
3 PM
30°
3%
4 PM
32°
3%
7-Day Forecast
Today
33° 21°
Clear.
Thu
33° 21°
Mostly Clear.
Fri
35° 21°
Clear.
Sat
31° 18°
Partly Cloudy.
Sun
36° 20°
Partly Cloudy.
Mon
34° 18°
Mostly Clear.
Tue
30° 16°
Mostly Clear.
TimeTempConditionsPrecipWindHumidity
Now 32° Clear 3% 9 mph SE 41%
6 PM 33° Clear 3% 8 mph SSE 39%
7 PM 32° Clear 3% 7 mph SE 41%
8 PM 31° Clear 3% 7 mph SE 47%
9 PM 29° Mostly Clear 3% 7 mph SE 53%
10 PM 26° Partly Cloudy 3% 7 mph SE 60%
11 PM 26° Mostly Clear 3% 8 mph SE 64%
12 AM 24° Clear 3% 9 mph SSE 68%
1 AM 24° Clear 3% 9 mph SSE 71%
2 AM 24° Clear 3% 9 mph SSE 72%
3 AM 23° Clear 3% 9 mph SSE 73%
4 AM 23° Clear 3% 9 mph SSE 73%
5 AM 22° Clear 3% 9 mph SSE 73%
6 AM 21° Clear 3% 8 mph SSE 73%
7 AM 21° Clear 3% 8 mph SSE 73%
8 AM 23° Clear 3% 9 mph S 67%
9 AM 24° Clear 3% 10 mph S 62%
10 AM 25° Clear 3% 10 mph S 56%
11 AM 26° Mostly Clear 3% 10 mph S 51%
12 PM 28° Mostly Clear 3% 11 mph S 47%
1 PM 29° Partly Cloudy 3% 11 mph S 44%
2 PM 29° Mostly Clear 3% 10 mph S 43%
3 PM 30° Mostly Clear 3% 10 mph S 42%
4 PM 32° Mostly Clear 3% 10 mph S 41%
15-Day Forecast
Today
7/15
Clear
3%
21°
33°
Thu
7/16
Mostly Clear
7%
21°
33°
Fri
7/17
Clear
7%
21°
35°
Sat
7/18
Partly Cloudy
8%
18°
31°
Sun
7/19
Partly Cloudy
19%
20°
36°
Mon
7/20
Mostly Clear
9%
18°
34°
Tue
7/21
Mostly Clear
9%
16°
30°
Wed
7/22
Mostly Cloudy
25%
16°
30°
Thu
7/23
Drizzle
60%
18°
32°
Fri
7/24
Drizzle
60%
17°
33°
Sat
7/25
Drizzle
60%
10°
32°
Sun
7/26
Drizzle
60%
17°
33°
Mon
7/27
Drizzle
60%
18°
32°
Tue
7/28
Drizzle
60%
18°
33°
Wed
7/29
Drizzle
60%
19°
34°
36
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
32 AQI 5.9 µg/m³
O3
Ground-level ozone
Dominant
36 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 36 Good 36 32
Fri 44 Good 44 33
Sat 52 Moderate 44 52
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 15, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE726 J/kg
MLCAPE228 J/kg
MUCAPE726 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-0.6
Kinematics
0–6 km Shear36 kt
0–1 km Shear2 kt
Eff. Shear35 kt
0–1 km SRH4
0–3 km SRH-22
Eff. SRH-22
Storm Motion190° @ 25 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index24.7
Thermo & Levels
PWAT1.15 in
0–3 km LR7.6 °C/km
700–500 LR4.7 °C/km
Total Totals40.6
LCL791 hPa
LFC962 hPa
EL207 hPa
Freezing Lvl16,214 ft