Heat Advisory — McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Clark, SD, Grant, SD, Deuel, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, 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: 5:17 PM CDT  ·  Refresh
36°C
Feels like 36°
Mostly Clear
▲ 37°  /  ▼ 21°
Wind
15 mph SSE
Humidity
31%
Dew Point
18°
Pressure
27.92 inHg
Visibility
10 mi
UV Index
7.1
Cloud Cover
14%
Sunrise
6:23 AM
Sunset
9:09 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Sully County is currently mostly clear at 35°C. Precipitation is likely — peak probability 80% around 11 AM. Atmospheric instability is elevated (CAPE up to 1427 J/kg) — isolated convective development possible. Sunrise: 6:23AM · Sunset: 9:09PM.

Alerts

Heat Advisory
McPherson, SD, Brown, SD, Marshall, SD, Roberts, SD, Edmunds, SD, Day, SD, Clark, SD, Grant, SD, Deuel, SD, Corson, SD, Campbell, SD, Walworth, SD, Dewey, SD, Potter, SD, Faulk, SD, Spink, SD, Stanley, SD, Sully, SD, Hughes, SD, Hyde, SD, Hand, SD, Jones, SD, Lyman, SD, Buffalo, SD
Expires 9:00 PM
63 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
5%
6 PM
34°
26%
7 PM
34°
28%
8 PM
32°
30%
9 PM
30°
30%
10 PM
28°
30%
11 PM
27°
30%
12 AM
27°
31%
1 AM
26°
25%
2 AM
25°
25%
3 AM
24°
29%
4 AM
23°
40%
5 AM
23°
40%
6 AM
21°
38%
7 AM
21°
49%
8 AM
21°
64%
9 AM
21°
72%
10 AM
22°
72%
11 AM
22°
80%
12 PM
23°
79%
1 PM
23°
79%
2 PM
24°
79%
3 PM
23°
72%
4 PM
23°
66%
7-Day Forecast
Today
37° 21°
Partly Cloudy with a 30% chance of rain.
Thu
32° 19°
Mostly Cloudy with a 80% chance of rain.
Fri
30° 17°
Mostly Clear with a 20% chance of rain.
Sat
32° 14°
Clear.
Sun
36° 16°
Partly Cloudy.
Mon
35° 19°
Mostly Clear.
Tue
26° 12°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 36° Mostly Clear 5% 15 mph SSE 31%
6 PM 34° Mostly Clear 26% 14 mph SSE 31%
7 PM 34° Partly Cloudy 28% 14 mph SSE 33%
8 PM 32° Mostly Cloudy 30% 12 mph SE 38%
9 PM 30° Mostly Cloudy 30% 10 mph SE 42%
10 PM 28° Mostly Cloudy 30% 10 mph SE 47%
11 PM 27° Mostly Cloudy 30% 10 mph SSE 52%
12 AM 27° Overcast 31% 10 mph SSE 56%
1 AM 26° Overcast 25% 9 mph S 61%
2 AM 25° Drizzle 25% 10 mph S 66%
3 AM 24° Drizzle 29% 10 mph SSW 72%
4 AM 23° Rain 40% 10 mph SSW 77%
5 AM 23° Overcast 40% 8 mph SSE 79%
6 AM 21° Overcast 38% 8 mph S 80%
7 AM 21° Rain 49% 6 mph S 80%
8 AM 21° Rain 64% 5 mph SSE 77%
9 AM 21° Overcast 72% 8 mph SSE 74%
10 AM 22° Overcast 72% 8 mph SSE 72%
11 AM 22° Overcast 80% 7 mph SSE 71%
12 PM 23° Rain 79% 9 mph SSE 69%
1 PM 23° Rain 79% 10 mph S 68%
2 PM 24° Rain 79% 7 mph SSE 70%
3 PM 23° Mostly Cloudy 72% 6 mph SE 71%
4 PM 23° Mostly Cloudy 66% 7 mph ESE 72%
15-Day Forecast
Today
7/29
Partly Cloudy
30%
21°
37°
Thu
7/30
Mostly Cloudy
80%
19°
32°
Fri
7/31
Mostly Clear
20%
17°
30°
Sat
8/1
Clear
3%
14°
32°
Sun
8/2
Partly Cloudy
3%
16°
36°
Mon
8/3
Mostly Clear
17%
19°
35°
Tue
8/4
Partly Cloudy
17%
12°
26°
Wed
8/5
Clear
43%
11°
27°
Thu
8/6
Partly Cloudy
44%
14°
30°
Fri
8/7
Drizzle
45%
18°
32°
Sat
8/8
Drizzle
60%
13°
31°
Sun
8/9
Drizzle
60%
19°
30°
Mon
8/10
Drizzle
60%
19°
31°
Tue
8/11
Drizzle
60%
21°
31°
Wed
8/12
Drizzle
60%
21°
32°
63
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
63 AQI 15.6 µg/m³
O3
Ground-level ozone
50 AQI 55 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 63 Moderate 50 63
Fri 55 Moderate 44 55
Sat 60 Moderate 45 60
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 29, 21:00'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
SBCAPE1514 J/kg
MLCAPE1131 J/kg
MUCAPE1514 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.2
Kinematics
0–6 km Shear28 kt
0–1 km Shear3 kt
Eff. Shear28 kt
0–1 km SRH17
0–3 km SRH-9
Eff. SRH-9
Storm Motion216° @ 19 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.0
Thermo & Levels
PWAT1.38 in
0–3 km LR8.5 °C/km
700–500 LR6.8 °C/km
Total Totals53.0
LCL732 hPa
LFC945 hPa
EL198 hPa
Freezing Lvl14,245 ft