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

Brown County, South Dakota, United States

Last updated: 7:40 PM CDT  ·  Refresh
8°C
Feels like 6°
Clear
▲ 11°  /  ▼ 2°
Wind
6 mph SSW
Humidity
46%
Dew Point
-3°
Pressure
29.09 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
7:50 AM
Sunset
6:45 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Brown County is currently clear at 8°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:50AM · Sunset: 6:45PM.

Alerts

Frost Advisory
Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD
Expires 9:00 AM
25 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
8°
11%
8 PM
6°
10%
9 PM
5°
3%
10 PM
4°
3%
11 PM
4°
3%
12 AM
4°
3%
1 AM
4°
3%
2 AM
3°
3%
3 AM
3°
3%
4 AM
3°
3%
5 AM
2°
3%
6 AM
2°
3%
7 AM
2°
3%
8 AM
3°
3%
9 AM
6°
3%
10 AM
8°
3%
11 AM
10°
3%
12 PM
12°
3%
1 PM
15°
3%
2 PM
17°
3%
3 PM
17°
3%
4 PM
17°
3%
5 PM
14°
3%
6 PM
13°
3%
7-Day Forecast
Tonight
11° 2°
Clear.
Sat
18° 2°
Clear.
Sun
20° 5°
Mostly Clear.
Mon
19° 4°
Clear.
Tue
21° 8°
Clear.
Wed
23° 11°
Mostly Clear.
Thu
23° 9°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 8° Clear 11% 6 mph SSW 46%
8 PM 6° Clear 10% 7 mph SSW 47%
9 PM 5° Clear 3% 8 mph SSW 50%
10 PM 4° Clear 3% 9 mph SSW 53%
11 PM 4° Clear 3% 11 mph SSW 55%
12 AM 4° Clear 3% 12 mph SSW 56%
1 AM 4° Clear 3% 13 mph SSW 58%
2 AM 3° Clear 3% 13 mph SSW 58%
3 AM 3° Clear 3% 14 mph SSW 59%
4 AM 3° Clear 3% 14 mph SSW 60%
5 AM 2° Clear 3% 14 mph SSW 60%
6 AM 2° Clear 3% 14 mph SSW 61%
7 AM 2° Clear 3% 14 mph SSW 60%
8 AM 3° Clear 3% 14 mph SSW 56%
9 AM 6° Clear 3% 15 mph SSW 51%
10 AM 8° Clear 3% 15 mph SSW 46%
11 AM 10° Clear 3% 15 mph SSW 40%
12 PM 12° Clear 3% 15 mph SSW 35%
1 PM 15° Clear 3% 15 mph SSW 32%
2 PM 17° Clear 3% 15 mph SSW 30%
3 PM 17° Clear 3% 15 mph SSW 29%
4 PM 17° Clear 3% 14 mph SSW 31%
5 PM 14° Clear 3% 13 mph SSW 34%
6 PM 13° Clear 3% 12 mph S 38%
15-Day Forecast
Today
10/16
Clear
11%
2°
11°
Sat
10/17
Clear
3%
2°
18°
Sun
10/18
Mostly Clear
3%
5°
20°
Mon
10/19
Clear
3%
4°
19°
Tue
10/20
Clear
3%
8°
21°
Wed
10/21
Mostly Clear
3%
11°
23°
Thu
10/22
Partly Cloudy
15%
9°
23°
Fri
10/23
Mostly Cloudy
37%
11°
22°
Sat
10/24
Drizzle
46%
4°
16°
Sun
10/25
Clear
35%
2°
11°
Mon
10/26
Drizzle
60%
3°
11°
Tue
10/27
Drizzle
60%
4°
11°
Wed
10/28
Clear
60%
4°
13°
Thu
10/29
Clear
60%
4°
12°
Fri
10/30
Clear
60%
6°
13°
25
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 1.2 µg/m³
O3
Ground-level ozone
Dominant
25 AQI 28 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 25 Good 25 7
Sun 29 Good 29 7
Mon 28 Good 28 19
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
MLCAPE3 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index21.6
Kinematics
0–6 km Shear45 kt
0–1 km Shear10 kt
Eff. Shear—
0–1 km SRH75
0–3 km SRH131
Eff. SRH—
Storm Motion9° @ 23 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-29.7
Thermo & Levels
PWAT0.27 in
0–3 km LR3.2 °C/km
700–500 LR5.0 °C/km
Total Totals2.1
LCL842 hPa
LFC—
EL—
Freezing Lvl8,442 ft