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

Waukesha County, Wisconsin, United States

Last updated: 7:57 PM CDT  ·  Refresh
26°C
Feels like 28°
Partly Cloudy
▲ 31°  /  ▼ 18°
Wind
9 mph SW
Humidity
80%
Dew Point
23°
Pressure
28.69 inHg
Visibility
10 mi
UV Index
0.8
Cloud Cover
40%
Sunrise
5:38 AM
Sunset
8:19 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Waukesha County is currently partly cloudy at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2033 J/kg) — isolated convective development possible. Sunrise: 5:38AM · Sunset: 8:19PM.

Alerts

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
26°
13%
8 PM
26°
31%
9 PM
25°
24%
10 PM
24°
18%
11 PM
23°
23%
12 AM
22°
13%
1 AM
21°
15%
2 AM
21°
3%
3 AM
20°
3%
4 AM
18°
3%
5 AM
18°
3%
6 AM
18°
3%
7 AM
19°
3%
8 AM
21°
3%
9 AM
23°
3%
10 AM
24°
3%
11 AM
24°
3%
12 PM
23°
3%
1 PM
23°
3%
2 PM
24°
3%
3 PM
24°
3%
4 PM
26°
3%
5 PM
26°
3%
6 PM
24°
3%
7-Day Forecast
Tonight
31° 18°
Partly Cloudy.
Tue
26° 17°
Mostly Clear.
Wed
31° 16°
Clear.
Thu
32° 18°
Partly Cloudy with a 21% chance of rain.
Fri
28° 18°
Rain, 64% chance.
Sat
32° 16°
Drizzle, 51% chance.
Sun
29° 15°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 13% 9 mph SW 80%
8 PM 26° Mostly Clear 31% 8 mph WSW 86%
9 PM 25° Mostly Clear 24% 6 mph NW 87%
10 PM 24° Partly Cloudy 18% 7 mph NNW 89%
11 PM 23° Partly Cloudy 23% 9 mph N 91%
12 AM 22° Mostly Cloudy 13% 12 mph NNE 93%
1 AM 21° Mostly Cloudy 15% 11 mph NNE 93%
2 AM 21° Overcast 3% 11 mph NNE 93%
3 AM 20° Mostly Cloudy 3% 10 mph N 92%
4 AM 18° Mostly Cloudy 3% 9 mph N 90%
5 AM 18° Partly Cloudy 3% 9 mph N 87%
6 AM 18° Partly Cloudy 3% 10 mph N 84%
7 AM 19° Partly Cloudy 3% 11 mph N 78%
8 AM 21° Partly Cloudy 3% 12 mph NNE 72%
9 AM 23° Mostly Clear 3% 12 mph NNE 66%
10 AM 24° Mostly Clear 3% 12 mph NNE 60%
11 AM 24° Mostly Clear 3% 12 mph NNE 55%
12 PM 23° Clear 3% 12 mph NNE 50%
1 PM 23° Clear 3% 12 mph NNE 48%
2 PM 24° Clear 3% 11 mph NNE 46%
3 PM 24° Clear 3% 11 mph NNE 45%
4 PM 26° Clear 3% 10 mph NNE 49%
5 PM 26° Clear 3% 9 mph NNE 53%
6 PM 24° Clear 3% 8 mph NE 57%
15-Day Forecast
Today
7/27
Partly Cloudy
18%
18°
31°
Tue
7/28
Mostly Clear
15%
17°
26°
Wed
7/29
Clear
7%
16°
31°
Thu
7/30
Partly Cloudy
21%
18°
32°
Fri
7/31
Rain
64%
18°
28°
Sat
8/1
Drizzle
51%
16°
32°
Sun
8/2
Clear
17%
15°
29°
Mon
8/3
Clear
8%
15°
30°
Tue
8/4
Clear
42%
17°
33°
Wed
8/5
Drizzle
44%
18°
33°
Thu
8/6
Drizzle
60%
17°
29°
Fri
8/7
Drizzle
60%
18°
31°
Sat
8/8
Rain
90%
18°
29°
Sun
8/9
Drizzle
60%
18°
30°
Mon
8/10
Drizzle
60%
17°
30°
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
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 54 Moderate 40 54
Wed 32 Good 32 32
Thu 56 Moderate 44 56
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, 23:00'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
SBCAPE1416 J/kg
MLCAPE2790 J/kg
MUCAPE4075 J/kg
SBCIN-187 J/kg
MLCIN0 J/kg
Lifted Index-4.4
Kinematics
0–6 km Shear57 kt
0–1 km Shear17 kt
Eff. Shear55 kt
0–1 km SRH118
0–3 km SRH56
Eff. SRH56
Storm Motion278° @ 38 kt
0–1 km EHI1.1
Composite Parameters
Sig. Tornado1.8
STP (eff)0.1
Supercell6.5
K-Index34.2
Thermo & Levels
PWAT1.78 in
0–3 km LR5.0 °C/km
700–500 LR6.1 °C/km
Total Totals53.3
LCL928 hPa
LFC756 hPa
EL214 hPa
Freezing Lvl15,732 ft