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

Severe Weather Across the Center of the Nation; Fire Weather Concerns for Southwest and California; Snow for the Central Rockies

Severe thunderstorms will continue to impact the center of the Nation through today. Very large hail, strong tornadoes, and damaging winds are expected from the Great Lakes into the central/southern Plains; Flash flooding is possible for portions into the mid-Mississippi Valley. Critical fire weather conditions for the Southwest and central valley of California today. Winter hangs on for Rockies. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

91°F

33°C

Humidity 39%
Wind Speed Calm
Barometer 30.18 in (1022.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 18 May 12:56 pm EDT
Extended Forecast for

Lisbon MD

  • This Afternoon

    This Afternoon: Sunny, with a high near 92. Southwest wind around 7 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Isolated showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Partly cloudy, with a low around 70. South wind around 7 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Isolated
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. Southwest wind 6 to 8 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 71. South wind around 7 mph.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 91. West wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    High: 91 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Showers

  • Thursday

    Thursday: A chance of showers after 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.

    High: 67 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 92. Southwest wind around 7 mph.
Tonight
Isolated showers and thunderstorms before 11pm, then isolated showers between 11pm and midnight. Partly cloudy, with a low around 70. South wind around 7 mph. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 93. Southwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 71. South wind around 7 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 91. West wind 5 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then showers likely. Low around 56. Chance of precipitation is 80%.
Thursday
A chance of showers after 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 50%.
Thursday Night
A chance of showers after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Friday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.
Friday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Saturday
Showers likely. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 75. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lisbon MD
 39.34°N 77.09°W (Elev. 699 ft)
Last Update:
10:53 am EDT May 18, 2026
Forecast Valid:
1pm EDT May 18, 2026-6pm EDT May 24, 2026
 
Forecast Discussion
 
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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