Heat Advisory — Brown, SD, Marshall, SD, Roberts, SD, Walworth, SD, Edmunds, SD, Day, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, 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: 5:39 PM CDT  ·  Refresh
31°C
Feels like 33°
Partly Cloudy
▲ 32°  /  ▼ 17°
Wind
10 mph N
Humidity
53%
Dew Point
21°
Pressure
28.28 inHg
Visibility
6 mi
UV Index
6.5
Cloud Cover
33%
Sunrise
5:57 AM
Sunset
9:15 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently partly cloudy at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2399 J/kg) — isolated convective development possible. Sunrise: 5:57AM · Sunset: 9:15PM.

Alerts

Heat Advisory
Brown, SD, Marshall, SD, Roberts, SD, Walworth, SD, Edmunds, SD, Day, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
3%
6 PM
31°
3%
7 PM
29°
3%
8 PM
27°
3%
9 PM
25°
3%
10 PM
23°
3%
11 PM
22°
3%
12 AM
21°
3%
1 AM
21°
3%
2 AM
20°
3%
3 AM
19°
3%
4 AM
18°
3%
5 AM
17°
3%
6 AM
17°
3%
7 AM
18°
3%
8 AM
20°
3%
9 AM
21°
3%
10 AM
22°
3%
11 AM
23°
3%
12 PM
26°
3%
1 PM
27°
3%
2 PM
27°
3%
3 PM
27°
3%
4 PM
27°
3%
7-Day Forecast
Today
32° 17°
Mostly Clear.
Sat
30° 17°
Partly Cloudy.
Sun
33° 19°
Mostly Clear with a 31% chance of rain.
Mon
32° 18°
Clear.
Tue
26° 14°
Partly Cloudy.
Wed
28° 14°
Clear.
Thu
30° 17°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 31° Partly Cloudy 3% 10 mph N 53%
6 PM 31° Mostly Clear 3% 11 mph N 51%
7 PM 29° Mostly Clear 3% 10 mph N 56%
8 PM 27° Mostly Clear 3% 9 mph NNE 63%
9 PM 25° Mostly Clear 3% 9 mph NNE 70%
10 PM 23° Partly Cloudy 3% 9 mph NE 74%
11 PM 22° Partly Cloudy 3% 9 mph NE 76%
12 AM 21° Partly Cloudy 3% 9 mph NE 79%
1 AM 21° Mostly Clear 3% 8 mph NE 81%
2 AM 20° Mostly Clear 3% 8 mph NE 83%
3 AM 19° Mostly Clear 3% 7 mph NE 86%
4 AM 18° Mostly Clear 3% 6 mph ENE 86%
5 AM 17° Mostly Clear 3% 6 mph ENE 86%
6 AM 17° Mostly Clear 3% 5 mph ENE 86%
7 AM 18° Mostly Clear 3% 5 mph ENE 79%
8 AM 20° Mostly Clear 3% 6 mph ENE 67%
9 AM 21° Mostly Clear 3% 6 mph ENE 56%
10 AM 22° Mostly Clear 3% 6 mph ENE 49%
11 AM 23° Mostly Clear 3% 5 mph ENE 44%
12 PM 26° Mostly Clear 3% 5 mph ENE 41%
1 PM 27° Mostly Clear 3% 5 mph ENE 39%
2 PM 27° Mostly Clear 3% 5 mph ENE 39%
3 PM 27° Mostly Clear 3% 5 mph ENE 38%
4 PM 27° Partly Cloudy 3% 5 mph ENE 39%
15-Day Forecast
Today
7/17
Mostly Clear
3%
17°
32°
Sat
7/18
Partly Cloudy
3%
17°
30°
Sun
7/19
Mostly Clear
31%
19°
33°
Mon
7/20
Clear
17%
18°
32°
Tue
7/21
Partly Cloudy
3%
14°
26°
Wed
7/22
Clear
9%
14°
28°
Thu
7/23
Clear
19%
17°
30°
Fri
7/24
Overcast
60%
17°
30°
Sat
7/25
Drizzle
60%
17°
31°
Sun
7/26
Drizzle
60%
18°
32°
Mon
7/27
Drizzle
60%
16°
33°
Tue
7/28
Drizzle
60%
19°
33°
Wed
7/29
Drizzle
60%
18°
32°
Thu
7/30
Drizzle
60%
18°
32°
Fri
7/31
Drizzle
60%
18°
32°
55
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
55 AQI 11.1 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 55 Moderate 37 55
Sun 51 Moderate 33 51
Mon 53 Moderate 37 53
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 Fri Jul 17, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2692 J/kg
MLCAPE2519 J/kg
MUCAPE2796 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.9
Kinematics
0–6 km Shear19 kt
0–1 km Shear1 kt
Eff. Shear23 kt
0–1 km SRH4
0–3 km SRH-4
Eff. SRH-4
Storm Motion244° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.0
Thermo & Levels
PWAT1.70 in
0–3 km LR7.1 °C/km
700–500 LR6.7 °C/km
Total Totals51.3
LCL834 hPa
LFC958 hPa
EL159 hPa
Freezing Lvl14,665 ft