Flood Warning — Brown County, SD 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

Brown County, South Dakota, United States

Last updated: 6:34 PM CDT  ·  Refresh
33°C
Feels like 32°
Clear
▲ 34°  /  ▼ 20°
Wind
10 mph SE
Humidity
33%
Dew Point
17°
Pressure
28.62 inHg
Visibility
10 mi
UV Index
5.5
Cloud Cover
1%
Sunrise
5:59 AM
Sunset
9:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Brown County is currently clear at 33°C. Dry conditions are expected through the next 24 hours. Sunrise: 5:59AM · Sunset: 9:19PM.

Alerts

Flood Warning
Brown County, SD
Expires
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
40 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
11%
7 PM
33°
11%
8 PM
31°
11%
9 PM
27°
3%
10 PM
25°
3%
11 PM
24°
3%
12 AM
23°
3%
1 AM
22°
3%
2 AM
22°
3%
3 AM
21°
3%
4 AM
21°
3%
5 AM
20°
3%
6 AM
20°
3%
7 AM
22°
3%
8 AM
24°
3%
9 AM
26°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
33°
3%
3 PM
34°
3%
4 PM
34°
3%
5 PM
35°
3%
7-Day Forecast
Tonight
34° 20°
Clear.
Thu
37° 20°
Mostly Clear.
Fri
37° 21°
Clear.
Sat
33° 18°
Partly Cloudy.
Sun
39° 20°
Mostly Clear with a 30% chance of rain.
Mon
36° 19°
Clear.
Tue
32° 18°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 11% 10 mph SE 33%
7 PM 33° Clear 11% 8 mph SE 36%
8 PM 31° Clear 11% 7 mph SE 44%
9 PM 27° Clear 3% 7 mph SE 52%
10 PM 25° Clear 3% 7 mph SE 57%
11 PM 24° Clear 3% 7 mph SE 61%
12 AM 23° Clear 3% 7 mph SSE 65%
1 AM 22° Clear 3% 7 mph SSE 68%
2 AM 22° Clear 3% 7 mph SSE 71%
3 AM 21° Clear 3% 7 mph SSE 74%
4 AM 21° Clear 3% 7 mph SSE 74%
5 AM 20° Clear 3% 8 mph SSE 74%
6 AM 20° Clear 3% 8 mph SSE 74%
7 AM 22° Clear 3% 8 mph S 69%
8 AM 24° Clear 3% 10 mph S 62%
9 AM 26° Mostly Clear 3% 10 mph S 55%
10 AM 28° Mostly Clear 3% 11 mph S 50%
11 AM 29° Mostly Clear 3% 11 mph S 44%
12 PM 31° Mostly Clear 3% 11 mph S 39%
1 PM 33° Mostly Clear 3% 11 mph S 36%
2 PM 33° Mostly Clear 3% 10 mph S 34%
3 PM 34° Mostly Clear 3% 10 mph S 32%
4 PM 34° Mostly Clear 3% 10 mph S 32%
5 PM 35° Clear 3% 10 mph S 32%
15-Day Forecast
Today
7/15
Clear
11%
20°
34°
Thu
7/16
Mostly Clear
3%
20°
37°
Fri
7/17
Clear
6%
21°
37°
Sat
7/18
Partly Cloudy
7%
18°
33°
Sun
7/19
Mostly Clear
30%
20°
39°
Mon
7/20
Clear
16%
19°
36°
Tue
7/21
Partly Cloudy
19%
18°
32°
Wed
7/22
Partly Cloudy
17%
18°
32°
Thu
7/23
Overcast
44%
18°
34°
Fri
7/24
Mostly Cloudy
44%
17°
34°
Sat
7/25
Drizzle
51%
15°
31°
Sun
7/26
Drizzle
60%
18°
33°
Mon
7/27
Drizzle
60%
18°
34°
Tue
7/28
Drizzle
60%
19°
34°
Wed
7/29
Drizzle
60%
20°
35°
40
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
29 AQI 5.3 µg/m³
O3
Ground-level ozone
Dominant
40 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 40 Good 40 29
Fri 47 Good 47 33
Sat 46 Good 44 46
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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE196 J/kg
MLCAPE16 J/kg
MUCAPE196 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index0.9
Kinematics
0–6 km Shear26 kt
0–1 km Shear5 kt
Eff. Shear16 kt
0–1 km SRH11
0–3 km SRH-16
Eff. SRH-16
Storm Motion182° @ 25 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index16.8
Thermo & Levels
PWAT0.98 in
0–3 km LR7.6 °C/km
700–500 LR5.0 °C/km
Total Totals40.2
LCL771 hPa
LFC969 hPa
EL248 hPa
Freezing Lvl16,385 ft