Heat Advisory — Northern Perkins, SD, Northern Meade Co Plains, SD, Ziebach, SD, Pennington Co Plains, SD, Haakon, SD, Northern Oglala Lakota, SD, Northern Jackson, SD, Mellette, SD, Tripp, SD, Southern Meade Co Plains, SD, Southern Jackson, SD, Southern Perkins, SD 8:00 PM

Mellette County, South Dakota, United States

Last updated: 5:18 PM CDT  ·  Refresh
36°C
Feels like 36°
Partly Cloudy
▲ 37°  /  ▼ 20°
Wind
14 mph SE
Humidity
28%
Dew Point
17°
Pressure
27.59 inHg
Visibility
10 mi
UV Index
7.0
Cloud Cover
31%
Sunrise
6:29 AM
Sunset
9:08 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Mellette County is currently partly cloudy at 36°C. Precipitation is likely — peak probability 85% around 1 AM. Atmospheric instability is elevated (CAPE up to 2119 J/kg) — isolated convective development possible. Sunrise: 6:29AM · Sunset: 9:08PM.

Alerts

Heat Advisory
Northern Perkins, SD, Northern Meade Co Plains, SD, Ziebach, SD, Pennington Co Plains, SD, Haakon, SD, Northern Oglala Lakota, SD, Northern Jackson, SD, Mellette, SD, Tripp, SD, Southern Meade Co Plains, SD, Southern Jackson, SD, Southern Perkins, SD
Expires 8:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
12%
6 PM
36°
30%
7 PM
34°
35%
8 PM
32°
41%
9 PM
30°
41%
10 PM
27°
52%
11 PM
26°
69%
12 AM
24°
75%
1 AM
23°
85%
2 AM
23°
84%
3 AM
22°
71%
4 AM
22°
71%
5 AM
22°
60%
6 AM
20°
48%
7 AM
21°
59%
8 AM
21°
72%
9 AM
22°
62%
10 AM
24°
62%
11 AM
24°
62%
12 PM
26°
63%
1 PM
26°
73%
2 PM
27°
77%
3 PM
27°
72%
4 PM
27°
73%
7-Day Forecast
Today
37° 20°
Partly Cloudy with a 69% chance of rain.
Thu
33° 18°
Heavy Rain, 84% chance.
Fri
30° 16°
Mostly Clear.
Sat
33° 13°
Clear.
Sun
38° 17°
Partly Cloudy.
Mon
37° 19°
Rain, 62% chance.
Tue
28° 13°
Drizzle, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 36° Partly Cloudy 12% 14 mph SE 28%
6 PM 36° Mostly Clear 30% 12 mph SSE 29%
7 PM 34° Partly Cloudy 35% 12 mph SSE 33%
8 PM 32° Mostly Cloudy 41% 10 mph SSE 41%
9 PM 30° Overcast 41% 10 mph SSE 49%
10 PM 27° Overcast 52% 9 mph SSE 56%
11 PM 26° Overcast 69% 9 mph S 62%
12 AM 24° Rain 75% 14 mph S 70%
1 AM 23° Rain 85% 15 mph S 80%
2 AM 23° Rain 84% 10 mph SSE 83%
3 AM 22° Overcast 71% 10 mph SSE 87%
4 AM 22° Overcast 71% 10 mph SSE 90%
5 AM 22° Heavy Rain 60% 10 mph SSE 91%
6 AM 20° Heavy Rain 48% 10 mph SSE 91%
7 AM 21° Heavy Rain 59% 11 mph SSE 91%
8 AM 21° Heavy Rain 72% 10 mph S 88%
9 AM 22° Mostly Cloudy 62% 10 mph S 84%
10 AM 24° Mostly Cloudy 62% 9 mph S 80%
11 AM 24° Mostly Cloudy 62% 8 mph SSE 77%
12 PM 26° Heavy Rain 63% 8 mph SSE 76%
1 PM 26° Heavy Rain 73% 8 mph SE 75%
2 PM 27° Mostly Cloudy 77% 7 mph SE 73%
3 PM 27° Mostly Cloudy 72% 7 mph SSE 71%
4 PM 27° Mostly Cloudy 73% 6 mph SSE 70%
15-Day Forecast
Today
7/29
Partly Cloudy
69%
20°
37°
Thu
7/30
Heavy Rain
84%
18°
33°
Fri
7/31
Mostly Clear
10%
16°
30°
Sat
8/1
Clear
3%
13°
33°
Sun
8/2
Partly Cloudy
3%
17°
38°
Mon
8/3
Rain
62%
19°
37°
Tue
8/4
Drizzle
63%
13°
28°
Wed
8/5
Clear
43%
11°
29°
Thu
8/6
Partly Cloudy
44%
14°
33°
Fri
8/7
Clear
50%
19°
36°
Sat
8/8
Drizzle
60%
13°
34°
Sun
8/9
Drizzle
60%
20°
33°
Mon
8/10
Drizzle
60%
21°
34°
Tue
8/11
Drizzle
60%
22°
34°
Wed
8/12
Drizzle
60%
22°
35°
56
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
56 AQI 12.0 µg/m³
O3
Ground-level ozone
54 AQI 57 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 56 Moderate 54 56
Fri 51 Moderate 48 51
Sat 55 Moderate 54 55
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 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1485 J/kg
MLCAPE1834 J/kg
MUCAPE2091 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-5.2
Kinematics
0–6 km Shear32 kt
0–1 km Shear4 kt
Eff. Shear35 kt
0–1 km SRH10
0–3 km SRH-23
Eff. SRH-23
Storm Motion214° @ 20 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index43.9
Thermo & Levels
PWAT1.63 in
0–3 km LR9.2 °C/km
700–500 LR6.6 °C/km
Total Totals55.0
LCL707 hPa
LFC934 hPa
EL191 hPa
Freezing Lvl14,065 ft