Timeline To 'Feels Like' 105 Degrees: NoVA, DC Weather

VIRGINIA — Parts of Northern Virginia and the District are under a heat advisory as scorching heat and humidity will make it feel like 105 degrees on Thursday.

The National Weather Service said the heat advisory is in effect until 8 p.m. for the District of Columbia, Fairfax, Arlington, Falls Church, Alexandria, Reston, Herndon, Annandale, Centreville, Chantilly, McLean, Franconia, Arlington, and Dahlgren.

Here's a timeline of the "feels like" temperature throughout the afternoon:

• 1 p.m.: 101 degrees
• 2 p.m.: 105 degrees
• 3 p.m.: 103 degrees
• 4 p.m.: 102 degrees
• 5 p.m.: 99 degrees
• 6 p.m.: 96 degrees
• 7 p.m.: 93 degrees
• 8 p.m.: 91 degrees

Chances for showers and thunderstorms are in the forecast through Sunday, which will knock high temps down into the low 90s and bring some relief to the state, the NWS said.

Heat advisories were in place from Virginia to Maine on Thursday, including Washington, D.C., Philadelphia, Boston, and Providence, Rhode Island, as well as places farther inland, like Burlington, Vermont, and Scranton, Pennsylvania, AccuWeather reported.

"Even in places where records are not tied or broken or the thermometer does not get to the triple digits, AccuWeather RealFeel® Temperature will exceed 100 F in many locations outside of the mountains and away from the immediate coast," AccuWeather said.

Hot temperatures and high humidity may cause heat illnesses, the National Weather Service warned. Marylanders should drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors. Children and pets should not be left unattended in vehicles under any circumstances.

Thursday’s heat spike is likely to be worse in New England and upstate New York, when compared to the mid-Atlantic, AccuWeather.com said. Washington, D.C., peaked at 99 degrees for the year to date on July 24 and 17. The capitol could approach that mark on Thursday.

"In the coastal mid-Atlantic, where the air will be the most humid, RealFeel Temperatures may range between 105 and 110 for a few hours" on Thursday, AccuWeather predicts.

Here's the latest DC region forecast from the National Weather Service:

Thursday: Sunny and hot, with a high near 97. Heat index values as high as 105. South wind 5 to 7 mph.

Thursday Night: Scattered showers and thunderstorms before 3am. Some of the storms could produce gusty winds. Partly cloudy, with a low around 75. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.

Friday: Showers likely and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rain. Mostly sunny, with a high near 91. Heat index values as high as 101. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: Showers and thunderstorms likely, mainly before 9pm. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 74. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 89. South wind 3 to 6 mph. Chance of precipitation is 50%.

Saturday Night: A chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 74. Chance of precipitation is 50%.

Sunday: A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

Sunday Night: A chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 74. Chance of precipitation is 30%.

Monday: Sunny, with a high near 92.