Severe Thunderstorm Watch 10:00 PM Severe Thunderstorm Watch 10:00 PM

Jefferson County, Wisconsin, United States

Last updated: 9:10 PM CDT  ·  Refresh
20°C
Feels like 22°
Partly Cloudy
▲ 23°  /  ▼ 14°
Wind
6 mph WSW
Humidity
93%
Dew Point
19°
Pressure
29.04 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
44%
Sunrise
6:07 AM
Sunset
7:47 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently partly cloudy at 20°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1179 J/kg) — isolated convective development possible. Sunrise: 6:07AM · Sunset: 7:47PM.

Alerts

Severe Thunderstorm Watch
Expires 10:00 PM
Severe Thunderstorm Watch
Expires 10:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
33%
10 PM
19°
26%
11 PM
19°
24%
12 AM
18°
16%
1 AM
18°
3%
2 AM
17°
3%
3 AM
17°
4%
4 AM
17°
4%
5 AM
15°
4%
6 AM
14°
5%
7 AM
14°
5%
8 AM
17°
8%
9 AM
18°
13%
10 AM
19°
14%
11 AM
21°
14%
12 PM
22°
14%
1 PM
25°
16%
2 PM
26°
16%
3 PM
26°
16%
4 PM
27°
12%
5 PM
26°
12%
6 PM
24°
5%
7 PM
23°
3%
8 PM
22°
3%
7-Day Forecast
Tonight
23° 14°
Partly Cloudy with a 33% chance of rain.
Sat
27° 13°
Mostly Clear.
Sun
23° 11°
Mostly Clear.
Mon
22° 9°
Partly Cloudy with a 60% chance of rain.
Tue
24° 12°
Clear with a 64% chance of rain.
Wed
28° 16°
Rain, 82% chance.
Thu
26° 16°
Clear with a 30% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 20° Partly Cloudy 33% 6 mph WSW 93%
10 PM 19° Mostly Clear 26% 5 mph WSW 94%
11 PM 19° Mostly Clear 24% 5 mph WNW 95%
12 AM 18° Mostly Clear 16% 5 mph WNW 95%
1 AM 18° Partly Cloudy 3% 6 mph NW 96%
2 AM 17° Mostly Clear 3% 7 mph NW 95%
3 AM 17° Partly Cloudy 4% 8 mph NNW 96%
4 AM 17° Partly Cloudy 4% 7 mph NW 96%
5 AM 15° Partly Cloudy 4% 7 mph NW 95%
6 AM 14° Partly Cloudy 5% 6 mph NW 95%
7 AM 14° Partly Cloudy 5% 6 mph NW 94%
8 AM 17° Mostly Clear 8% 8 mph NW 89%
9 AM 18° Mostly Clear 13% 8 mph NW 83%
10 AM 19° Mostly Clear 14% 9 mph NW 78%
11 AM 21° Mostly Clear 14% 11 mph NW 70%
12 PM 22° Mostly Clear 14% 13 mph NW 63%
1 PM 25° Mostly Clear 16% 14 mph NW 57%
2 PM 26° Mostly Clear 16% 14 mph NW 54%
3 PM 26° Mostly Clear 16% 13 mph NW 53%
4 PM 27° Mostly Clear 12% 13 mph NW 52%
5 PM 26° Mostly Clear 12% 12 mph NW 56%
6 PM 24° Partly Cloudy 5% 11 mph NW 59%
7 PM 23° Partly Cloudy 3% 10 mph NW 63%
8 PM 22° Mostly Clear 3% 9 mph NW 65%
15-Day Forecast
Today
8/21
Partly Cloudy
33%
14°
23°
Sat
8/22
Mostly Clear
16%
13°
27°
Sun
8/23
Mostly Clear
3%
11°
23°
Mon
8/24
Partly Cloudy
60%
9°
22°
Tue
8/25
Clear
64%
12°
24°
Wed
8/26
Rain
82%
16°
28°
Thu
8/27
Clear
30%
16°
26°
Fri
8/28
Clear
17%
16°
27°
Sat
8/29
Drizzle
68%
16°
27°
Sun
8/30
Thunderstorm
90%
18°
29°
Mon
8/31
Drizzle
60%
17°
29°
Tue
9/1
Drizzle
60%
17°
29°
Wed
9/2
Drizzle
60%
16°
27°
Thu
9/3
Drizzle
60%
16°
26°
Fri
9/4
Clear
60%
15°
26°
54
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
54 AQI 10.8 µg/m³
O3
Ground-level ozone
32 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 32 54
Sun 29 Good 29 18
Mon 27 Good 27 14
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 Aug 21, 23:00'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
SBCAPE843 J/kg
MLCAPE1587 J/kg
MUCAPE2044 J/kg
SBCIN-144 J/kg
MLCIN-63 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear32 kt
0–1 km Shear14 kt
Eff. Shear29 kt
0–1 km SRH93
0–3 km SRH105
Eff. SRH105
Storm Motion335° @ 21 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.3
STP (eff)0.5
Supercell3.2
K-Index30.8
Thermo & Levels
PWAT1.38 in
0–3 km LR5.3 °C/km
700–500 LR6.0 °C/km
Total Totals50.1
LCL967 hPa
LFC798 hPa
EL242 hPa
Freezing Lvl12,595 ft