Frost Advisory — Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD 9:00 AM

Marshall County, South Dakota, United States

Last updated: 7:40 PM CDT  ·  Refresh
43°F
Feels like 40°
Clear
▲ 51°  /  ▼ 37°
Wind
6 mph SW
Humidity
46%
Dew Point
25°
Pressure
28.82 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
7:47 AM
Sunset
6:42 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Marshall County is currently clear at 43°F. Dry conditions are expected through the next 24 hours. Sunrise: 7:47AM · Sunset: 6:42PM.

Alerts

Frost Advisory
Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD
Expires 9:00 AM
26 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
43°
11%
8 PM
40°
10%
9 PM
40°
3%
10 PM
40°
3%
11 PM
40°
3%
12 AM
39°
3%
1 AM
40°
3%
2 AM
40°
3%
3 AM
40°
3%
4 AM
40°
3%
5 AM
38°
3%
6 AM
38°
3%
7 AM
39°
3%
8 AM
41°
3%
9 AM
43°
3%
10 AM
46°
3%
11 AM
50°
3%
12 PM
53°
3%
1 PM
58°
3%
2 PM
61°
3%
3 PM
62°
3%
4 PM
61°
3%
5 PM
57°
3%
6 PM
56°
3%
7-Day Forecast
Tonight
51° 37°
Clear.
Sat
64° 38°
Clear.
Sun
68° 44°
Mostly Clear.
Mon
66° 42°
Clear.
Tue
70° 48°
Clear.
Wed
73° 52°
Clear.
Thu
74° 50°
Overcast.
TimeTempConditionsPrecipWindHumidity
Now 43° Clear 11% 6 mph SW 46%
8 PM 40° Clear 10% 8 mph SSW 46%
9 PM 40° Clear 3% 9 mph SSW 49%
10 PM 40° Clear 3% 11 mph SSW 51%
11 PM 40° Clear 3% 12 mph SSW 52%
12 AM 39° Clear 3% 14 mph SSW 53%
1 AM 40° Clear 3% 15 mph SSW 54%
2 AM 40° Clear 3% 16 mph SSW 54%
3 AM 40° Clear 3% 17 mph SSW 55%
4 AM 40° Clear 3% 18 mph SSW 55%
5 AM 38° Clear 3% 18 mph SSW 55%
6 AM 38° Clear 3% 18 mph SSW 55%
7 AM 39° Clear 3% 18 mph SSW 53%
8 AM 41° Clear 3% 18 mph SSW 51%
9 AM 43° Clear 3% 18 mph SSW 47%
10 AM 46° Clear 3% 18 mph SSW 42%
11 AM 50° Clear 3% 18 mph SSW 38%
12 PM 53° Clear 3% 18 mph SSW 33%
1 PM 58° Clear 3% 18 mph SSW 31%
2 PM 61° Clear 3% 18 mph SSW 30%
3 PM 62° Clear 3% 18 mph SSW 30%
4 PM 61° Clear 3% 18 mph SSW 31%
5 PM 57° Clear 3% 17 mph SSW 34%
6 PM 56° Clear 3% 17 mph SSW 36%
15-Day Forecast
Today
10/16
Clear
11%
37°
51°
Sat
10/17
Clear
3%
38°
64°
Sun
10/18
Mostly Clear
3%
44°
68°
Mon
10/19
Clear
3%
42°
66°
Tue
10/20
Clear
3%
48°
70°
Wed
10/21
Clear
14%
52°
73°
Thu
10/22
Overcast
15%
50°
74°
Fri
10/23
Overcast
37%
52°
72°
Sat
10/24
Drizzle
47%
38°
62°
Sun
10/25
Clear
43%
35°
52°
Mon
10/26
Drizzle
60%
37°
50°
Tue
10/27
Drizzle
60%
39°
52°
Wed
10/28
Clear
25%
39°
55°
Thu
10/29
Clear
60%
40°
54°
Fri
10/30
Clear
60%
41°
56°
26
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
7 AQI 1.3 µg/m³
O3
Ground-level ozone
Dominant
26 AQI 28 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 26 Good 26 7
Sun 28 Good 28 7
Mon 27 Good 27 23
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Fri Oct 16, 23:00'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
SBCAPE0 J/kg
MLCAPE7 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index22.0
Kinematics
0–6 km Shear48 kt
0–1 km Shear7 kt
Eff. Shear—
0–1 km SRH62
0–3 km SRH113
Eff. SRH—
Storm Motion10° @ 26 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-25.8
Thermo & Levels
PWAT0.29 in
0–3 km LR3.2 °C/km
700–500 LR5.0 °C/km
Total Totals6.0
LCL831 hPa
LFC—
EL—
Freezing Lvl7,480 ft