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

Clark County, South Dakota, United States

Last updated: 7:38 PM CDT  ·  Refresh
6°C
Feels like 4°
Clear
▲ 10°  /  ▼ 3°
Wind
5 mph W
Humidity
47%
Dew Point
-4°
Pressure
28,62 inHg
Visibility
10 mi
UV Index
0,0
Cloud Cover
0%
Sunrise
7:46 AM
Sunset
6:44 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clark County is currently clear at 6°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:46AM · Sunset: 6:44PM.

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
6°
11%
8 PM
4°
10%
9 PM
4°
3%
10 PM
3°
3%
11 PM
3°
3%
12 AM
3°
3%
1 AM
3°
3%
2 AM
3°
3%
3 AM
3°
3%
4 AM
3°
3%
5 AM
3°
3%
6 AM
3°
3%
7 AM
3°
3%
8 AM
4°
3%
9 AM
5°
3%
10 AM
7°
3%
11 AM
9°
3%
12 PM
11°
3%
1 PM
14°
3%
2 PM
15°
3%
3 PM
16°
3%
4 PM
16°
3%
5 PM
13°
3%
6 PM
13°
3%
7-Day Forecast
Tonight
10° 3°
Clear.
Sat
17° 3°
Clear.
Sun
18° 6°
Mostly Clear.
Mon
18° 6°
Clear.
Tue
19° 9°
Clear.
Wed
22° 11°
Clear.
Thu
23° 11°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 6° Clear 11% 5 mph W 47%
8 PM 4° Clear 10% 5 mph SW 47%
9 PM 4° Clear 3% 6 mph SSW 50%
10 PM 3° Clear 3% 7 mph S 52%
11 PM 3° Clear 3% 9 mph S 54%
12 AM 3° Clear 3% 10 mph S 56%
1 AM 3° Clear 3% 12 mph S 58%
2 AM 3° Clear 3% 13 mph S 58%
3 AM 3° Clear 3% 14 mph SSW 58%
4 AM 3° Clear 3% 16 mph SSW 58%
5 AM 3° Clear 3% 16 mph SSW 58%
6 AM 3° Clear 3% 17 mph SSW 58%
7 AM 3° Clear 3% 17 mph SSW 57%
8 AM 4° Clear 3% 18 mph SSW 54%
9 AM 5° Clear 3% 18 mph SSW 51%
10 AM 7° Clear 3% 18 mph SSW 46%
11 AM 9° Clear 3% 18 mph SSW 41%
12 PM 11° Clear 3% 18 mph SSW 36%
1 PM 14° Clear 3% 18 mph SSW 33%
2 PM 15° Clear 3% 18 mph SSW 32%
3 PM 16° Clear 3% 18 mph SSW 31%
4 PM 16° Clear 3% 18 mph SSW 32%
5 PM 13° Clear 3% 17 mph SSW 34%
6 PM 13° Clear 3% 17 mph S 36%
15-Day Forecast
Today
10/16
Clear
11%
3°
10°
Sat
10/17
Clear
3%
3°
17°
Sun
10/18
Mostly Clear
3%
6°
18°
Mon
10/19
Clear
3%
6°
18°
Tue
10/20
Clear
5%
9°
19°
Wed
10/21
Clear
14%
11°
22°
Thu
10/22
Partly Cloudy
15%
11°
23°
Fri
10/23
Overcast
27%
11°
21°
Sat
10/24
Drizzle
53%
4°
16°
Sun
10/25
Clear
43%
2°
11°
Mon
10/26
Drizzle
60%
3°
11°
Tue
10/27
Drizzle
60%
4°
11°
Wed
10/28
Drizzle
60%
4°
12°
Thu
10/29
Clear
60%
5°
12°
Fri
10/30
Clear
25%
6°
13°
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
9 AQI 1.7 µg/m³
O3
Ground-level ozone
Dominant
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 26 Good 26 9
Sun 28 Good 28 10
Mon 22 Good 22 18
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 ven. 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
MLCAPE6 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index21.6
Kinematics
0–6 km Shear45 kt
0–1 km Shear5 kt
Eff. Shear—
0–1 km SRH33
0–3 km SRH85
Eff. SRH—
Storm Motion16° @ 27 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-30.0
Thermo & Levels
PWAT0.28 in
0–3 km LR3.1 °C/km
700–500 LR5.1 °C/km
Total Totals5.5
LCL832 hPa
LFC—
EL—
Freezing Lvl7,559 ft