Lala Approaching Hawaii; Flash Flooding Risks; Excessive Heat

Lala, may become a hurricane, is expected to impact Hawaii this weekend. Heavy rainfall, strong winds, dangerous surf and localized flooding are expected. Heavy rainfall and flash flooding concerns from the mid-Mississippi Valley, Ohio Valley into the central Appalachians continues, with the threat shifting toward the mid-Atlantic later this weekend. Record heat continues for areas of the South. Read More >

Hazardous Weather Conditions

Heat Advisory until August 16, 09:00 PM CDT

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

77°F

25°C

Humidity	93%
Wind Speed	SE 7 mph
Barometer	30.01 in
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	15 Aug 3:35 am CDT

More Information:

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

Extended Forecast for

Royal Lakes IL

Heat Advisory August 15, 03:42am until August 16, 09:00pm

Click here for hazard details and duration

Heat Advisory

Heat Advisory August 15, 03:42am until August 16, 09:00pm
NOW until 9:00pm Sun
Heat Advisory
Overnight
Low: 75 °F
Slight Chance
T-storms
Saturday
High: 89 °F
Chance
T-storms then
Partly Sunny
Saturday Night
Low: 74 °F
Mostly Clear
then Slight
Chance
T-storms
Sunday
High: 90 °F
Decreasing
Clouds
Sunday Night
Low: 68 °F
Slight Chance
T-storms then
Slight Chance
Showers
Monday
High: 84 °F
Mostly Sunny
Monday Night
Low: 64 °F
Partly Cloudy
Tuesday
High: 86 °F
Sunny

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. South wind around 7 mph.

Saturday

A 40 percent chance of showers and thunderstorms, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 89. Heat index values as high as 103. Northeast wind 5 to 8 mph becoming southwest in the afternoon.

Saturday Night

A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 74. Light and variable wind.

Sunday

Mostly cloudy, then gradually becoming sunny, with a high near 90. Heat index values as high as 103. West wind 5 to 8 mph.

Sunday Night

A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 68. North wind 5 to 8 mph. Chance of precipitation is 20%.

Monday

Mostly sunny, with a high near 84.

Monday Night

Partly cloudy, with a low around 64.

Tuesday

Sunny, with a high near 86.

Tuesday Night

A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.

Wednesday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.

Wednesday Night

A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.