Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Great Lakes

Thunderstorms with strong wind gusts and hail will be possible today from Michigan into the Lower Great Lakes region. A significant and dangerous heat wave will expand from the Central U.S. into the Eastern U.S this weekend through much of next week. Numerous daily record highs and warm lows are likely. Read More >

Hazardous Weather Conditions

Current conditions at

Waukesha County Airport (KUES)

Lat: 43.04°NLon: 88.25°WElev: 886ft.

Partly Cloudy

88°F

31°C

Humidity	66%
Wind Speed	SW 18 G 25 mph
Barometer	29.80 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	98°F (37°C)
Last update	21 Jun 11:45 am CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Lannon WI

Heat Advisory until June 23, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory until June 23, 07:00pm
NOW until 7:00pm Mon
Heat Advisory
This Afternoon
High: 93 °F
Hot and Windy
Tonight
Low: 78 °F
Mostly Clear
and Breezy
then Mostly
Clear
Sunday
High: 95 °F
Sunny then
Sunny and
Breezy
Sunday Night
Low: 77 °F
Clear
Monday
High: 94 °F
Breezy. Sunny
then Slight
Chance
T-storms
Monday Night
Low: 69 °F
Chance
T-storms
Tuesday
High: 81 °F
Chance
T-storms then
Showers
Likely
Tuesday Night
Low: 62 °F
Chance
T-storms

Detailed Forecast

This Afternoon

Sunny and hot, with a high near 93. Heat index values as high as 100. Windy, with a southwest wind 20 to 25 mph, with gusts as high as 40 mph.

Tonight

Mostly clear, with a low around 78. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.

Sunday

Sunny and hot, with a high near 95. Heat index values as high as 102. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 25 mph.

Sunday Night

Clear, with a low around 77. Southwest wind around 15 mph.

Monday

A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 94. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Monday Night

A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. Southwest wind 5 to 10 mph.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Northeast wind around 5 mph.

Wednesday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.

Wednesday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

Thursday

Showers and thunderstorms likely. Partly sunny, with a high near 84. Chance of precipitation is 70%.

Thursday Night

Showers and thunderstorms likely. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

Friday

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 79.