Severe Thunderstorm Watch 7:00 PM Heat Advisory — Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI, Fond Du Lac, WI, Sheboygan, WI, Washington, WI, Ozaukee, WI, Waukesha, WI, Milwaukee, WI, Racine, WI, Kenosha, WI, Marquette, WI, Green Lake, WI, Dodge, WI, Jefferson, WI, Walworth, WI 9:00 PM

Washington County, Wisconsin, United States

Last updated: 6:03 PM CDT  ·  Refresh
27°C
Feels like 29°
Partly Cloudy
▲ 31°  /  ▼ 18°
Wind
11 mph SSW
Humidity
79%
Dew Point
24°
Pressure
28.56 inHg
Visibility
10 mi
UV Index
5.0
Cloud Cover
32%
Sunrise
5:37 AM
Sunset
8:20 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently partly cloudy at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2629 J/kg) — isolated convective development possible. Sunrise: 5:37AM · Sunset: 8:20PM.

Alerts

Severe Thunderstorm Watch
Expires 7:00 PM
Heat Advisory
Sauk, WI, Columbia, WI, Iowa, WI, Dane, WI, Lafayette, WI, Green, WI, Rock, WI, Fond Du Lac, WI, Sheboygan, WI, Washington, WI, Ozaukee, WI, Waukesha, WI, Milwaukee, WI, Racine, WI, Kenosha, WI, Marquette, WI, Green Lake, WI, Dodge, WI, Jefferson, WI, Walworth, WI
Expires 9:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
17%
7 PM
28°
21%
8 PM
26°
21%
9 PM
26°
23%
10 PM
24°
22%
11 PM
23°
17%
12 AM
23°
14%
1 AM
22°
3%
2 AM
21°
3%
3 AM
20°
3%
4 AM
20°
3%
5 AM
18°
3%
6 AM
18°
3%
7 AM
18°
3%
8 AM
19°
3%
9 AM
21°
3%
10 AM
22°
3%
11 AM
23°
3%
12 PM
23°
3%
1 PM
23°
3%
2 PM
23°
3%
3 PM
23°
3%
4 PM
23°
3%
5 PM
26°
3%
7-Day Forecast
Tonight
31° 18°
Partly Cloudy with a 23% chance of rain.
Tue
26° 17°
Mostly Clear.
Wed
30° 16°
Clear with a 25% chance of rain.
Thu
33° 18°
Mostly Clear with a 51% chance of rain.
Fri
28° 18°
Mostly Cloudy with a 58% chance of rain.
Sat
29° 16°
Drizzle, 52% chance.
Sun
28° 16°
Partly Cloudy with a 24% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 27° Partly Cloudy 17% 11 mph SSW 79%
7 PM 28° Clear 21% 10 mph WSW 83%
8 PM 26° Mostly Clear 21% 8 mph W 86%
9 PM 26° Mostly Clear 23% 6 mph NNW 89%
10 PM 24° Partly Cloudy 22% 8 mph N 92%
11 PM 23° Partly Cloudy 17% 9 mph N 91%
12 AM 23° Partly Cloudy 14% 11 mph NNE 91%
1 AM 22° Partly Cloudy 3% 11 mph NNE 92%
2 AM 21° Partly Cloudy 3% 11 mph NNE 93%
3 AM 20° Partly Cloudy 3% 10 mph N 93%
4 AM 20° Partly Cloudy 3% 10 mph N 93%
5 AM 18° Mostly Cloudy 3% 10 mph N 90%
6 AM 18° Partly Cloudy 3% 10 mph N 88%
7 AM 18° Partly Cloudy 3% 11 mph N 85%
8 AM 19° Partly Cloudy 3% 11 mph N 78%
9 AM 21° Mostly Clear 3% 12 mph NNE 72%
10 AM 22° Mostly Clear 3% 12 mph NNE 66%
11 AM 23° Mostly Clear 3% 12 mph NNE 61%
12 PM 23° Mostly Clear 3% 12 mph NNE 56%
1 PM 23° Clear 3% 12 mph NNE 51%
2 PM 23° Clear 3% 11 mph NNE 51%
3 PM 23° Clear 3% 11 mph NNE 50%
4 PM 23° Clear 3% 10 mph NNE 50%
5 PM 26° Clear 3% 9 mph NE 54%
15-Day Forecast
Today
7/27
Partly Cloudy
23%
18°
31°
Tue
7/28
Mostly Clear
14%
17°
26°
Wed
7/29
Clear
25%
16°
30°
Thu
7/30
Mostly Clear
51%
18°
33°
Fri
7/31
Mostly Cloudy
58%
18°
28°
Sat
8/1
Drizzle
52%
16°
29°
Sun
8/2
Partly Cloudy
24%
16°
28°
Mon
8/3
Mostly Clear
9%
15°
29°
Tue
8/4
Drizzle
47%
19°
33°
Wed
8/5
Drizzle
66%
17°
31°
Thu
8/6
Drizzle
67%
17°
30°
Fri
8/7
Drizzle
60%
18°
30°
Sat
8/8
Drizzle
60%
18°
29°
Sun
8/9
Drizzle
60%
18°
30°
Mon
8/10
Drizzle
60%
17°
29°
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 10.7 µg/m³
O3
Ground-level ozone
42 AQI 46 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 54 Moderate 42 54
Wed 31 Good 26 31
Thu 55 Moderate 40 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 Mon Jul 27, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2642 J/kg
MLCAPE2575 J/kg
MUCAPE3488 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-7.2
Kinematics
0–6 km Shear59 kt
0–1 km Shear21 kt
Eff. Shear55 kt
0–1 km SRH179
0–3 km SRH110
Eff. SRH110
Storm Motion277° @ 40 kt
0–1 km EHI3.0
Composite Parameters
Sig. Tornado5.1
STP (eff)3.0
Supercell10.9
K-Index34.9
Thermo & Levels
PWAT1.70 in
0–3 km LR5.4 °C/km
700–500 LR6.4 °C/km
Total Totals54.5
LCL926 hPa
LFC967 hPa
EL166 hPa
Freezing Lvl15,564 ft