National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Hazardous Weather Conditions

Current Conditions

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Mc Henry MD

7 Day Forecast

For More Weather Information:

Pittsburgh, PA Local Forecast Office

Overnight

Patchy Fog

Patchy
Fog

Low: 62 °F

Thursday

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

High: 76 °F

Thursday
Night

Thunderstorms Likely Chance for Measurable Precipitation 70%

Thunderstorms
Likely

Low: 62 °F

Friday

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

High: 76 °F

Friday
Night

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

Low: 60 °F

Saturday

Chance Thunderstorms Chance for Measurable Precipitation 50%

Chance
Thunderstorms

High: 74 °F

Saturday
Night

Chance Thunderstorms Chance for Measurable Precipitation 40%

Chance
Thunderstorms

Low: 59 °F

Sunday

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

High: 75 °F

Sunday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 58 °F

Detailed Forecast

  • Overnight Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 62. West wind around 6 mph.
  • Thursday A slight chance of showers, then a chance of showers and thunderstorms after 11am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 76. West wind 6 to 10 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  • Thursday Night Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 62. West wind 3 to 7 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
  • Friday A chance of showers and thunderstorms. Mostly cloudy, with a high near 76. Light southwest wind. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
  • Friday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 50%. New rainfall amounts between a half and three quarters of an inch possible.
  • Saturday A chance of showers and thunderstorms. Mostly cloudy, with a high near 74. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
  • Saturday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
  • Sunday A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 30%.
  • Sunday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
  • Monday Partly sunny, with a high near 75.
  • Monday Night Mostly cloudy, with a low around 57.
  • Tuesday Mostly sunny, with a high near 75.
  • Tuesday Night Partly cloudy, with a low around 57.
  • Wednesday A chance of showers and thunderstorms. Partly sunny, with a high near 75. Chance of precipitation is 30%.