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

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Fair and Breezy

91°F

33°C

Humidity	59%
Wind Speed	SW 23 G 33 mph
Barometer	29.74 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	102°F (39°C)
Last update	21 Jun 5:45 pm CDT

More Information:

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

Extended Forecast for

5 Miles SW Fort Atkinson WI

Heat Advisory June 21, 06:19pm until June 23, 07:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory June 21, 06:19pm until June 23, 07:00pm
NOW until 7:00pm Mon
Heat Advisory
Tonight
Low: 78 °F
Mostly Clear
and Windy
then Mostly
Clear
Sunday
High: 93 °F
Hot
Sunday Night
Low: 77 °F
Clear
Monday
High: 92 °F
Hot
Monday Night
Low: 70 °F
Chance
T-storms
Tuesday
High: 85 °F
Showers
Likely
Tuesday Night
Low: 66 °F
Chance
T-storms then
Showers
Likely
Wednesday
High: 85 °F
Showers
Likely

Detailed Forecast

Tonight

Mostly clear, with a low around 78. Windy, with a southwest wind 15 to 25 mph, with gusts as high as 40 mph.

Sunday

Sunny and hot, with a high near 93. Heat index values as high as 102. Southwest wind around 15 mph, with gusts as high as 30 mph.

Sunday Night

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

Monday

Sunny and hot, with a high near 92. Heat index values as high as 98. Southwest wind around 15 mph.

Monday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Southwest wind 5 to 15 mph.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 85. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Northeast wind around 5 mph becoming southeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

Thursday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 85. Chance of precipitation is 70%.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.

Friday

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.

Friday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

Saturday

A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.