National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Thunderstorms, Heavy Rain and Heat in the Memorial Day Forecast

Strong to severe thunderstorms and heavy rain with possible flash flooding are expected from Texas to the Upper Mississippi Valley on Memorial Day. Also, a soaking rain with flooding is expected across south-central Florida. Meanwhile, a week of record breaking heat is going to get started across California into the Southwest and Great Basin, as excessive heat warnings stretch across the region. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Light Rain

68°F

20°C

Humidity 84%
Wind Speed SE 14 mph
Barometer 29.90 in (1011.3 mb)
Dewpoint 63°F (17°C)
Visibility 9.00 mi
Last update 24 May 11:51 pm CDT
Extended Forecast for

Greendale MO

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. South wind around 6 mph.

    Chance
    T-storms

    Low: 67 °F

  • Memorial
    Day

    Memorial Day: Showers and thunderstorms likely, mainly between 4pm and 5pm. Partly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 60%.

    Slight Chance
    T-storms then
    T-storms
    Likely

    High: 88 °F

  • Monday
    Night

    Monday Night: A 50 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 69. Southeast wind around 7 mph.

    Chance
    T-storms then
    Slight Chance
    T-storms

    Low: 69 °F

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 84. Calm wind becoming south around 6 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Chance
    T-storms then
    T-storms
    Likely

    High: 84 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening.

    Chance
    T-storms

    Low: 69 °F

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 70%.

    Chance
    T-storms then
    T-storms
    Likely

    High: 83 °F

  • Wednesday
    Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.

    Chance
    T-storms

    Low: 69 °F

  • Thursday

    Thursday: Showers and thunderstorms, mainly after 1pm. High near 83. Chance of precipitation is 80%.

    Chance
    T-storms then
    T-storms

    High: 83 °F

  • Thursday
    Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 67.

    Chance
    T-storms

    Low: 67 °F

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. South wind around 6 mph.
Memorial Day
Showers and thunderstorms likely, mainly between 4pm and 5pm. Partly sunny, with a high near 88. South wind 5 to 10 mph. Chance of precipitation is 60%.
Monday Night
A 50 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 69. Southeast wind around 7 mph.
Tuesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 84. Calm wind becoming south around 6 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Thursday
Showers and thunderstorms, mainly after 1pm. High near 83. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 67.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 79.
Friday Night
Mostly cloudy, with a low around 61.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 80.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Greendale MO
 38.69°N 90.31°W (Elev. 594 ft)
Last Update:
12:28 am CDT May 25, 2020
Forecast Valid:
12am CDT May 25, 2020-6pm CDT May 30, 2020
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation