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: 5:05 PM CDT  ·  Refresh
33°C
Feels like 33°
Clear
▲ 35°  /  ▼ 19°
Wind
10 mph SSE
Humidity
35%
Dew Point
17°
Pressure
28.66 inHg
Visibility
10 mi
UV Index
7.5
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°
3%
6 PM
34°
3%
7 PM
34°
3%
8 PM
32°
3%
9 PM
29°
3%
10 PM
26°
3%
11 PM
25°
3%
12 AM
24°
3%
1 AM
23°
3%
2 AM
22°
3%
3 AM
22°
3%
4 AM
21°
3%
5 AM
21°
3%
6 AM
19°
3%
7 AM
20°
3%
8 AM
22°
3%
9 AM
24°
3%
10 AM
26°
3%
11 AM
27°
3%
12 PM
29°
3%
1 PM
31°
3%
2 PM
32°
3%
3 PM
32°
3%
4 PM
34°
3%
7-Day Forecast
Today
35° 19°
Clear.
Thu
36° 19°
Mostly Clear.
Fri
37° 21°
Mostly Clear.
Sat
32° 18°
Partly Cloudy.
Sun
37° 20°
Partly Cloudy.
Mon
36° 19°
Mostly Clear.
Tue
31° 17°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 3% 10 mph SSE 35%
6 PM 34° Clear 3% 10 mph SSE 33%
7 PM 34° Clear 3% 9 mph SE 35%
8 PM 32° Clear 3% 8 mph SE 43%
9 PM 29° Clear 3% 7 mph SE 50%
10 PM 26° Clear 3% 7 mph SE 56%
11 PM 25° Clear 3% 6 mph SE 62%
12 AM 24° Clear 3% 6 mph SE 66%
1 AM 23° Clear 3% 7 mph SSE 71%
2 AM 22° Clear 3% 7 mph SSE 73%
3 AM 22° Clear 3% 7 mph SSE 75%
4 AM 21° Clear 3% 7 mph SSE 78%
5 AM 21° Clear 3% 7 mph SSE 78%
6 AM 19° Clear 3% 7 mph SSE 78%
7 AM 20° Clear 3% 7 mph SSE 76%
8 AM 22° Clear 3% 8 mph SSE 69%
9 AM 24° Mostly Clear 3% 9 mph S 61%
10 AM 26° Mostly Clear 3% 10 mph S 55%
11 AM 27° Mostly Clear 3% 10 mph S 50%
12 PM 29° Mostly Clear 3% 10 mph S 45%
1 PM 31° Mostly Clear 3% 10 mph S 41%
2 PM 32° Mostly Clear 3% 10 mph S 39%
3 PM 32° Mostly Clear 3% 10 mph S 38%
4 PM 34° Mostly Clear 3% 10 mph S 36%
15-Day Forecast
Today
7/15
Clear
3%
19°
35°
Thu
7/16
Mostly Clear
7%
19°
36°
Fri
7/17
Mostly Clear
3%
21°
37°
Sat
7/18
Partly Cloudy
17%
18°
32°
Sun
7/19
Partly Cloudy
19%
20°
37°
Mon
7/20
Mostly Clear
9%
19°
36°
Tue
7/21
Partly Cloudy
9%
17°
31°
Wed
7/22
Mostly Cloudy
25%
16°
31°
Thu
7/23
Drizzle
60%
18°
33°
Fri
7/24
Drizzle
60%
16°
34°
Sat
7/25
Drizzle
60%
11°
33°
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, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE383 J/kg
MLCAPE52 J/kg
MUCAPE383 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index0.7
Kinematics
0–6 km Shear35 kt
0–1 km Shear3 kt
Eff. Shear30 kt
0–1 km SRH5
0–3 km SRH-13
Eff. SRH-13
Storm Motion185° @ 26 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index19.0
Thermo & Levels
PWAT1.04 in
0–3 km LR7.9 °C/km
700–500 LR4.7 °C/km
Total Totals37.9
LCL775 hPa
LFC970 hPa
EL222 hPa
Freezing Lvl16,572 ft