Heat Expands for Center of the Nation; Severe Thunderstorms for Plains and Upper Midwest

Dangerous heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest. Critical fire weather for portions of the Intermountain West. Risk for severe thunderstorms and flash flooding across the Upper Midwest/Great Lakes, Ohio Valley, and portions of the mid-Atlantic. Active monsoonal moisture fuels thunderstorms over the Southwest. Hurricane Fausto in the Pacific, should weaken Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62°NLon: 89.04°WElev: 801ft.

Mostly Cloudy

81°F

27°C

Humidity	94%
Wind Speed	S 8 mph
Barometer	29.91 in
Dewpoint	79°F (26°C)
Visibility	8.00 mi
Heat Index	89°F (32°C)
Last update	26 Jul 10:45 am CDT

More Information:

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

Extended Forecast for

5 Miles NNW Shirland IL

Heat Advisory July 26, 12:00pm until July 26, 09:00pm

Click here for hazard details and duration

Heat Advisory

Today
High: 90 °F
Hot
Tonight
Low: 72 °F
Partly Cloudy
then Chance
T-storms
Monday
High: 91 °F
Showers
Likely then
Mostly Sunny
Monday Night
Low: 68 °F
Mostly Clear
Tuesday
High: 84 °F
Mostly Sunny
Tuesday Night
Low: 60 °F
Mostly Clear
Wednesday
High: 84 °F
Sunny
Wednesday Night
Low: 60 °F
Mostly Clear
Thursday
High: 86 °F
Mostly Sunny

Detailed Forecast

Today

Partly sunny and hot, with a high near 90. Heat index values as high as 102. South wind 5 to 10 mph.

Tonight

A 40 percent chance of showers and thunderstorms, mainly between 3am and 4am. Increasing clouds, with a low around 72. Southwest wind 5 to 10 mph becoming north after midnight.

Monday

Showers and thunderstorms likely, mainly before 8am. Mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Heat index values as high as 105. South wind 5 to 15 mph becoming east in the morning. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday Night

Mostly clear, with a low around 68. West wind around 10 mph becoming north after midnight.

Tuesday

Mostly sunny, with a high near 84. North wind around 10 mph.

Tuesday Night

Mostly clear, with a low around 60. Northeast wind 5 to 10 mph becoming light east in the evening.

Wednesday

Sunny, with a high near 84. Calm wind becoming north around 5 mph in the morning.

Wednesday Night

Mostly clear, with a low around 60. Northeast wind around 5 mph becoming calm in the evening.

Thursday

Mostly sunny, with a high near 86.