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 >

Current conditions at

St Marys County Airport (K2W6)

Lat: 38.32° N Lon: 76.55° W Elev: 144 ft.

Fair

78°F

26°C

Humidity 68%
Wind Speed Vrbl 7 mph
Barometer 30.20 in
Dewpoint 66°F (19°C)
Visibility 9.00 mi
Heat Index80°F (27°C)
Last update 18 May 8:35 am EDT
Detailed forecast for

Calvert County

Today
Sunny, hot with highs in the lower 90s. South winds 5 to 10 mph.
Tonight
Mostly clear. Lows in the lower 70s. South winds 5 to 10 mph.
Tuesday
Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph.
Tuesday Night
Mostly clear. Lows in the lower 70s. South winds around 10 mph with gusts up to 20 mph.
Wednesday
Sunny in the morning, then partly sunny with showers likely in the afternoon. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 70 percent.
Wednesday Night
Showers. Lows around 60. Chance of rain 80 percent.
Thursday
Showers likely. Much cooler with highs in the upper 60s. Chance of rain 70 percent.
Thursday Night
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 50s.
Friday
Showers likely. Highs in the mid 60s. Chance of rain 70 percent.
Friday Night
Showers likely. Lows in the upper 50s. Chance of rain 70 percent.
Saturday
Showers likely. Highs in the mid 70s. Chance of rain 70 percent.
Saturday Night
Showers likely. Lows in the lower 60s. Chance of rain 70 percent.
Sunday
Showers likely. Highs in the upper 70s. Chance of rain 60 percent.



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756 AM EDT Mon May 18 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database