Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

72°F

22°C

Humidity 64%
Wind Speed SW 9 mph
Barometer 30.13 in (1021.4 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 13 Apr 11:56 am EDT
Extended Forecast for

Sandy Spring MD

  • This Afternoon

    This Afternoon: Scattered showers, mainly before 3pm.  Partly sunny, with a high near 79. Southwest wind around 18 mph, with gusts as high as 33 mph.  Chance of precipitation is 30%.

    High: 79 °F

    Scattered
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm  after midnight.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers after 2pm.  Mostly sunny, with a high near 88. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.  Chance of precipitation is 20%.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 66. Southwest wind 3 to 6 mph.

    Low: 66 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers after 2pm.  Mostly sunny, with a high near 91. Southwest wind 3 to 8 mph.  Chance of precipitation is 20%.

    High: 91 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 2am.  Mostly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 90.

    High: 90 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Scattered showers, mainly before 3pm. Partly sunny, with a high near 79. Southwest wind around 18 mph, with gusts as high as 33 mph. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 61. Southwest wind 5 to 7 mph becoming calm after midnight.
Tuesday
A slight chance of showers after 2pm. Mostly sunny, with a high near 88. Calm wind becoming southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 66. Southwest wind 3 to 6 mph.
Wednesday
A slight chance of showers after 2pm. Mostly sunny, with a high near 91. Southwest wind 3 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 20%.
Thursday
Partly sunny, with a high near 90.
Thursday Night
Mostly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Sunday
A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Sandy Spring MD
 39.16°N 77.04°W (Elev. 469 ft)
10:53 am EDT Apr 13, 2026
12pm EDT Apr 13, 2026-6pm EDT Apr 19, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database