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Summary of June 21, 2026 Tornadoes

Hazardous Weather Conditions

Current conditions at

Harrisburg-Raleigh Airport (KHSB)

Lat: 37.81°NLon: 88.54°WElev: 387ft.

Fog/Mist

73°F

23°C

Humidity	100%
Wind Speed	Calm
Barometer	29.89 in
Dewpoint	73°F (23°C)
Visibility	4.00 mi
Last update	28 Jun 3:35 am CDT

More Information:

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

Extended Forecast for

Herald IL

Extreme Heat Watch June 29, 11:00am until July 2, 08:00pm

Flood Watch June 28, 03:40am until June 28, 07:00am

Heat Advisory June 28, 12:00pm until June 28, 08:00pm

Click here for hazard details and duration

Extreme Heat Watch

Flood Watch

Heat Advisory

Flood Watch June 28, 03:40am until June 28, 07:00am
NOW until 7:00am Sun
Flood Watch
Overnight
Low: 71 °F
Showers
Likely
Sunday
High: 92 °F
Chance
T-storms then
Sunny
Sunday Night
Low: 74 °F
Mostly Clear
Monday
High: 94 °F
Sunny
Monday Night
Low: 74 °F
Clear
Tuesday
High: 96 °F
Sunny
Tuesday Night
Low: 74 °F
Clear
Wednesday
High: 96 °F
Sunny

Detailed Forecast

Overnight

A chance of showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%.

Sunday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly sunny, with a high near 92. Calm wind becoming southwest around 6 mph in the morning.

Sunday Night

Mostly clear, with a low around 74. South wind 3 to 5 mph.

Monday

Sunny, with a high near 94. Heat index values as high as 105. South southwest wind 3 to 8 mph.

Monday Night

Clear, with a low around 74. South wind 3 to 6 mph.

Tuesday

Sunny, with a high near 96. Calm wind becoming south southwest around 6 mph in the morning.

Tuesday Night

Clear, with a low around 74. Light south wind.

Wednesday

Sunny, with a high near 96. Light south southwest wind.