Frost Advisory — Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD 9:00 AM

Day County, South Dakota, United States

Last updated: 8:27 PM CDT  ·  Refresh
4°C
Feels like 3°
Clear
▲ 9°  /  ▼ 3°
Wind
5 mph SW
Humidity
51%
Dew Point
-4°
Pressure
28.57 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
7:46 AM
Sunset
6:43 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Day County is currently clear at 5°C. Dry conditions are expected through the next 24 hours. Sunrise: 7:46AM · Sunset: 6:43PM.

Alerts

Frost Advisory
Brown, SD, Marshall, SD, Roberts, SD, Day, SD, Spink, SD, Clark, SD
Expires 9:00 AM
26 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
4°
11%
9 PM
3°
3%
10 PM
3°
3%
11 PM
3°
3%
12 AM
3°
3%
1 AM
3°
3%
2 AM
3°
3%
3 AM
3°
3%
4 AM
4°
3%
5 AM
4°
3%
6 AM
3°
3%
7 AM
3°
3%
8 AM
4°
3%
9 AM
6°
3%
10 AM
7°
3%
11 AM
9°
3%
12 PM
11°
3%
1 PM
13°
3%
2 PM
15°
3%
3 PM
16°
3%
4 PM
16°
3%
5 PM
16°
3%
6 PM
14°
3%
7 PM
13°
3%
7-Day Forecast
Tonight
9° 3°
Clear.
Sat
17° 3°
Clear.
Sun
19° 7°
Partly Cloudy.
Mon
18° 6°
Clear.
Tue
19° 8°
Mostly Clear.
Wed
22° 11°
Mostly Clear.
Thu
23° 11°
Mostly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 4° Clear 11% 5 mph SW 51%
9 PM 3° Clear 3% 7 mph SSW 51%
10 PM 3° Clear 3% 8 mph SSW 53%
11 PM 3° Clear 3% 10 mph SSW 55%
12 AM 3° Clear 3% 11 mph SSW 56%
1 AM 3° Clear 3% 12 mph SSW 56%
2 AM 3° Clear 3% 14 mph SSW 57%
3 AM 3° Clear 3% 15 mph SSW 57%
4 AM 4° Clear 3% 16 mph SSW 57%
5 AM 4° Clear 3% 17 mph SSW 57%
6 AM 3° Clear 3% 17 mph SSW 56%
7 AM 3° Clear 3% 17 mph SSW 55%
8 AM 4° Clear 3% 17 mph SSW 53%
9 AM 6° Clear 3% 17 mph SSW 49%
10 AM 7° Clear 3% 18 mph SSW 45%
11 AM 9° Clear 3% 18 mph SSW 40%
12 PM 11° Clear 3% 18 mph SSW 35%
1 PM 13° Clear 3% 18 mph SSW 32%
2 PM 15° Clear 3% 18 mph SSW 31%
3 PM 16° Clear 3% 18 mph SSW 30%
4 PM 16° Clear 3% 18 mph SSW 31%
5 PM 16° Clear 3% 17 mph SSW 33%
6 PM 14° Clear 3% 17 mph SSW 35%
7 PM 13° Clear 3% 17 mph SSW 37%
15-Day Forecast
Today
10/16
Clear
11%
3°
9°
Sat
10/17
Clear
3%
3°
17°
Sun
10/18
Partly Cloudy
3%
7°
19°
Mon
10/19
Clear
3%
6°
18°
Tue
10/20
Mostly Clear
3%
8°
19°
Wed
10/21
Mostly Clear
3%
11°
22°
Thu
10/22
Mostly Cloudy
18%
11°
23°
Fri
10/23
Mostly Cloudy
31%
11°
22°
Sat
10/24
Drizzle
54%
4°
16°
Sun
10/25
Clear
35%
2°
11°
Mon
10/26
Clear
23%
3°
10°
Tue
10/27
Clear
60%
3°
11°
Wed
10/28
Drizzle
60%
4°
12°
Thu
10/29
Clear
25%
4°
12°
Fri
10/30
Drizzle
60%
3°
11°
26
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
8 AQI 1.4 µg/m³
O3
Ground-level ozone
Dominant
26 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 26 Good 26 8
Sun 28 Good 28 8
Mon 24 Good 24 23
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Fri Oct 16, 23:00'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
SBCAPE0 J/kg
MLCAPE10 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index23.0
Kinematics
0–6 km Shear46 kt
0–1 km Shear8 kt
Eff. Shear—
0–1 km SRH62
0–3 km SRH117
Eff. SRH—
Storm Motion10° @ 25 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-30.3
Thermo & Levels
PWAT0.26 in
0–3 km LR2.7 °C/km
700–500 LR4.9 °C/km
Total Totals-0.4
LCL852 hPa
LFC—
EL—
Freezing Lvl7,733 ft