Severe Thunderstorms in the Northern Plains and Upper Midwest; Critical Fire Weather in the West; Dangerous Heat in the Central and Eastern U.S.

Severe thunderstorms are likely today across the northern Plains and into the upper Mississippi Valley. Gusty winds and dry conditions will result in widespread critical fire weather through Saturday across parts of the Four Corners region and the Great Basin. 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. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Partly Cloudy

75°F

24°C

Humidity	89%
Wind Speed	S 13 mph
Barometer	29.81 in
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	21 Jun 5:45 am CDT

More Information:

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

Extended Forecast for

6 Miles SSE Rockdale WI

Heat Advisory June 21, 12:00pm until June 23, 07:00pm

Click here for hazard details and duration

Heat Advisory

Today
High: 95 °F
Hot and Windy
Tonight
Low: 78 °F
Mostly Clear
and Breezy
then Mostly
Clear
Sunday
High: 96 °F
Sunny then
Sunny and
Breezy
Sunday Night
Low: 78 °F
Clear
Monday
High: 93 °F
Sunny then
Slight Chance
T-storms
Monday Night
Low: 70 °F
Chance
T-storms
Tuesday
High: 84 °F
Chance
T-storms then
Showers
Likely
Tuesday Night
Low: 65 °F
Chance
T-storms
Wednesday
High: 85 °F
Showers
Likely

Detailed Forecast

Today

Sunny and hot, with a high near 95. Heat index values as high as 103. Windy, with a southwest wind 15 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 96. Heat index values as high as 103. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 25 mph.

Sunday Night

Clear, with a low around 78. Southwest wind around 15 mph, with gusts as high as 25 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 93. Southwest wind around 15 mph. Chance of precipitation is 20%.

Monday Night

A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 70. Southwest wind 5 to 10 mph becoming northwest after midnight.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. North wind around 5 mph becoming south in the afternoon. 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 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. East wind around 5 mph.

Wednesday

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

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 and thunderstorms likely. Mostly sunny, with a high near 85. Chance of precipitation is 60%.

Thursday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

Friday

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.