Heat Advisory — Brown, SD, Marshall, SD, Roberts, SD, Walworth, SD, Edmunds, SD, Day, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD 9:00 PM

Sully County, South Dakota, United States

Last updated: 5:35 PM CDT  ·  Refresh
34°C
Feels like 36°
Mostly Clear
▲ 37°  /  ▼ 18°
Wind
10 mph NNE
Humidity
35%
Dew Point
19°
Pressure
27.98 inHg
Visibility
10 mi
UV Index
6.9
Cloud Cover
17%
Sunrise
6:10 AM
Sunset
9:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently mostly clear at 35°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1632 J/kg) — isolated convective development possible. Sunrise: 6:10AM · Sunset: 9:21PM.

Alerts

Heat Advisory
Brown, SD, Marshall, SD, Roberts, SD, Walworth, SD, Edmunds, SD, Day, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Clark, SD, Codington, SD, Grant, SD, Hamlin, SD, Deuel, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
45 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
5%
6 PM
34°
10%
7 PM
34°
10%
8 PM
32°
10%
9 PM
30°
10%
10 PM
27°
8%
11 PM
26°
8%
12 AM
24°
3%
1 AM
23°
3%
2 AM
23°
7%
3 AM
22°
6%
4 AM
21°
7%
5 AM
21°
3%
6 AM
18°
3%
7 AM
19°
3%
8 AM
21°
3%
9 AM
22°
3%
10 AM
23°
3%
11 AM
24°
3%
12 PM
27°
3%
1 PM
28°
3%
2 PM
30°
3%
3 PM
31°
3%
4 PM
31°
3%
7-Day Forecast
Today
37° 18°
Mostly Clear.
Sat
34° 18°
Mostly Clear.
Sun
37° 21°
Partly Cloudy with a 35% chance of rain.
Mon
36° 22°
Clear.
Tue
28° 18°
Clear.
Wed
28° 16°
Partly Cloudy.
Thu
31° 18°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Clear 5% 10 mph NNE 35%
6 PM 34° Mostly Clear 10% 9 mph NE 34%
7 PM 34° Mostly Clear 10% 9 mph NE 38%
8 PM 32° Clear 10% 10 mph NE 43%
9 PM 30° Clear 10% 12 mph NE 48%
10 PM 27° Clear 8% 12 mph NE 53%
11 PM 26° Clear 8% 12 mph NE 56%
12 AM 24° Mostly Clear 3% 12 mph NE 60%
1 AM 23° Mostly Clear 3% 12 mph ENE 64%
2 AM 23° Partly Cloudy 7% 11 mph ENE 68%
3 AM 22° Partly Cloudy 6% 11 mph ENE 73%
4 AM 21° Mostly Cloudy 7% 10 mph ENE 75%
5 AM 21° Mostly Cloudy 3% 10 mph ENE 75%
6 AM 18° Mostly Cloudy 3% 9 mph ENE 75%
7 AM 19° Partly Cloudy 3% 10 mph E 70%
8 AM 21° Partly Cloudy 3% 10 mph E 60%
9 AM 22° Mostly Clear 3% 10 mph E 51%
10 AM 23° Mostly Clear 3% 10 mph E 43%
11 AM 24° Mostly Clear 3% 10 mph E 36%
12 PM 27° Mostly Clear 3% 10 mph E 31%
1 PM 28° Mostly Clear 3% 10 mph E 28%
2 PM 30° Mostly Clear 3% 10 mph E 27%
3 PM 31° Mostly Clear 3% 10 mph E 26%
4 PM 31° Mostly Clear 3% 10 mph E 26%
15-Day Forecast
Today
7/17
Mostly Clear
10%
18°
37°
Sat
7/18
Mostly Clear
7%
18°
34°
Sun
7/19
Partly Cloudy
35%
21°
37°
Mon
7/20
Clear
8%
22°
36°
Tue
7/21
Clear
9%
18°
28°
Wed
7/22
Partly Cloudy
19%
16°
28°
Thu
7/23
Clear
19%
18°
31°
Fri
7/24
Overcast
60%
19°
32°
Sat
7/25
Drizzle
60%
18°
32°
Sun
7/26
Drizzle
60%
17°
33°
Mon
7/27
Drizzle
60%
17°
35°
Tue
7/28
Drizzle
60%
22°
36°
Wed
7/29
Drizzle
60%
21°
34°
Thu
7/30
Drizzle
60%
21°
34°
Fri
7/31
Drizzle
60%
21°
34°
45
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
45 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 45 Good 45 29
Sun 41 Good 41 23
Mon 42 Good 42 33
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 Fri Jul 17, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2120 J/kg
MLCAPE1310 J/kg
MUCAPE2120 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-6.5
Kinematics
0–6 km Shear19 kt
0–1 km Shear4 kt
Eff. Shear19 kt
0–1 km SRH12
0–3 km SRH7
Eff. SRH7
Storm Motion198° @ 10 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.2
K-Index35.8
Thermo & Levels
PWAT1.58 in
0–3 km LR8.4 °C/km
700–500 LR7.1 °C/km
Total Totals53.1
LCL755 hPa
LFC947 hPa
EL166 hPa
Freezing Lvl14,035 ft