Severe thunderstorms and heavy rain for portions of the southern U.S.

A storm system will produce scattered severe thunderstorms and heavy rain in portions of lower-mid Mississippi River Valley and Gulf Coast region on Saturday. Very large hail, locally damaging winds, isolated tornadoes and flash flooding are possible in this area. Some of the flooding could be significant in portions of Louisiana, Mississippi and southeast Arkansas.
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Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

59°F

15°C

Humidity 87%
Wind Speed E 5 mph
Barometer 29.88 in (1011.7 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 30 Apr 2:53 am CDT
Extended Forecast for

Herculaneum MO

  • Overnight

    Overnight: Showers and possibly a thunderstorm before 4am, then showers and thunderstorms after 4am.  Low around 56. East wind around 9 mph.  Chance of precipitation is 80%.

    T-storms

    Low: 56 °F

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 11am.  High near 74. Southeast wind 10 to 13 mph becoming south in the afternoon.  Chance of precipitation is 80%.

    T-storms then
    Chance
    T-storms

    High: 74 °F

  • Saturday
    Night

    Saturday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 56. South wind 5 to 7 mph becoming west after midnight.

    Chance
    T-storms

    Low: 56 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 71. West wind 5 to 11 mph.

    Slight Chance
    T-storms

    High: 71 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 49. North wind 6 to 10 mph.

    Mostly Cloudy

    Low: 49 °F

  • Monday

    Monday: A 20 percent chance of showers.  Partly sunny, with a high near 64.

    Slight Chance
    Showers

    High: 64 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 48.

    Mostly Cloudy

    Low: 48 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    Mostly Sunny

    High: 68 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 51.

    Partly Cloudy

    Low: 51 °F

Detailed Forecast

Overnight
Showers and possibly a thunderstorm before 4am, then showers and thunderstorms after 4am. Low around 56. East wind around 9 mph. Chance of precipitation is 80%.
Saturday
Showers and thunderstorms, mainly before 11am. High near 74. Southeast wind 10 to 13 mph becoming south in the afternoon. Chance of precipitation is 80%.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56. South wind 5 to 7 mph becoming west after midnight.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 71. West wind 5 to 11 mph.
Sunday Night
Mostly cloudy, with a low around 49. North wind 6 to 10 mph.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 74.
Click Map For Forecast
Point Forecast:
Herculaneum MO
 38.27°N 90.39°W (Elev. 456 ft)
1:14 am CDT Apr 30, 2016
3am CDT Apr 30, 2016-6pm CDT May 6, 2016
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database