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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Carroll County Regional Jack B Poage Field (KDMW)

Lat: 39.61°NLon: 77.01°WElev: 789ft.

Partly Cloudy

91°F

33°C

Humidity 49%
Wind Speed SW 7 mph
Barometer 29.94 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index96°F (36°C)
Last update 17 Aug 1:45 pm EDT
Extended Forecast for

4 Miles SSE Unionville MD

  • This Afternoon

    This Afternoon: Isolated showers between 3pm and 5pm, then scattered showers and thunderstorms after 5pm. Mostly sunny, with a high near 90. West wind around 5 mph. Chance of precipitation is 30%.

    High: 90 °F

    Scattered
    T-storms

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 67. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Scattered
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers after 2pm. Mostly cloudy, with a high near 74. Northeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 74 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly after 8pm. Mostly cloudy, with a low around 64. East wind around 6 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Mostly cloudy, with a high near 74. East wind around 6 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Isolated showers between 3pm and 5pm, then scattered showers and thunderstorms after 5pm. Mostly sunny, with a high near 90. West wind around 5 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 67. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.
Monday
A slight chance of showers after 2pm. Mostly cloudy, with a high near 74. Northeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Monday Night
A chance of showers, mainly after 8pm. Mostly cloudy, with a low around 64. East wind around 6 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers. Mostly cloudy, with a high near 74. East wind around 6 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 63.
Friday
Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Unionville MD
 39.45°N 77.1°W (Elev. 705 ft)
Last Update:
1:29 pm EDT Aug 17, 2025
Forecast Valid:
1pm EDT Aug 17, 2025-6pm EDT Aug 23, 2025
 
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