Severe Thunderstorms, Heavy Rain, And Flash Flooding Likely Over The Central U.S.

Strong to severe thunderstorms capable of damaging winds, large hail, and a few tornadoes will be likely this afternoon into tonight over portions of the Plains to the Midwest. Heavy rainfall will lead to flash flooding, some locally significant from Kansas to Missouri. Across the eastern U.S., much above normal temperatures can be expected. Read More >

Hazardous Weather Conditions

Current conditions at

Janesville-Rock County (KJVL)

Lat: 42.62° N Lon: 89.04° W Elev: 801 ft.

Light Rain

72°F

22°C

Humidity	100%
Wind Speed	S 12 G 20 mph
Barometer	30.02 in
Dewpoint	72°F (22°C)
Visibility	6.00 mi
Last update	21 Sep 12:45 pm CDT

More Information:

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

Detailed forecast for

Rock County

Rest Of Today

Light showers likely and chance of thunderstorms early in the afternoon, then light showers and thunderstorms likely late in the afternoon. Highs in the mid 70s. South winds 10 to 15 mph with gusts to around 30 mph. Chance of precipitation 70 percent.

Tonight

Thunderstorms likely through around midnight. Showers through the night. Thunderstorms likely after midnight. Some thunderstorms may produce heavy rainfall after midnight. Lows in the upper 60s. Southwest winds 10 to 15 mph with gusts to around 30 mph. Chance of precipitation near 100 percent.

Sunday

Showers with thunderstorms likely in the morning, then showers likely and chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Highs in the lower 70s. Southwest winds 5 to 10 mph. Chance of precipitation 80 percent.

Sunday Night

Cooler. Mostly cloudy with a 50 percent chance of rain showers and thunderstorms through around midnight, then mostly clear after midnight. Lows in the mid 50s. Northwest winds 5 to 10 mph.

Monday

Sunny. Highs in the lower 70s. West winds 5 to 15 mph.

Monday Night

Clear through around midnight then becoming partly cloudy. Lows in the lower 50s.

Tuesday

Partly sunny. Highs in the mid 70s.

Tuesday Night

Partly cloudy. A 20 percent chance of light rain showers and thunderstorms after midnight. Lows in the upper 50s.

Wednesday

Partly sunny with a 40 percent chance of light rain showers and thunderstorms. Highs in the lower 70s.

Wednesday Night

Partly cloudy. A 40 percent chance of light rain showers and thunderstorms through around midnight. Lows in the lower 50s.

Thursday

Mostly sunny. A 20 percent chance of light rain showers and thunderstorms in the afternoon. Highs in the upper 60s.

Thursday Night

Partly cloudy through around midnight then becoming mostly cloudy. A 20 percent chance of light rain showers and thunderstorms. Lows in the lower 50s.

Friday

Partly sunny with a 30 percent chance of light rain showers and thunderstorms. Highs in the lower 70s.