WASHINGTON — Showers and storms are ongoing along I-81, some are strong with gusty winds. They also contain heavy rain and lightning. They’ll continue east slowly across I-81. Storms can be expected for Hagerstown, Winchester and Martinsburg. As they continue east, we’re running up against sunset, so eventually they’ll lose intensity as evening wears on. It’s still something we’re watching closely for NW DC suburbs. Some lighter showers/rumbles of thunder are possible early tonight.

QUICK FORECAST 
Tonight: Some early showers/storms, especially west. Turning partly cloudy, warm and muggy with areas of fog. Low: 77.
Monday: Partly cloudy, hot and humid. Isolated PM storms, locally heavy/strong. Heat index 100 – 105. High: 96.
Tuesday: Partly cloudy, hot and humid. Scattered PM storms, some heavy/strong. Heat Index 98 – 104. High: 94.

FORECAST DISCUSSION:

Some storms continue this evening around I-81, some are heavy/strong. Isolated storms possible in the metro. Tonight is partly cloudy, warm and muggy with areas of fog.

The hot weather sticks around for most of the work week — and eventually storm coverage increases.

Monday will be partly cloudy, hot and humid with isolated PM showers and t-storms. Any storm that pops up could be locally heavy/strong. Highs reach the mid 90s with the heat index between 100 and 105, very close to Heat Advisory Criteria. Remember to stay hydrated, limit time outdoors in the afternoon, and never leave kids/pets in a car!

Feels Like Temperatures Monday

WUSA

Tuesday the storm coverage increases a bit in the afternoon. We’re expecting scattered t-storms, some could be heavy/strong. Before the storms it will be very hot and humid with highs in the low to mid 90s and the heat index on either side of 100.

High Temps vs. Heat Index

High Temps (shown in light yellow) verses the Heat Index (shown in white) each day.

WUSA

Here’s a look at the Futurecast for the next 36 hours:

DETAILED FORECAST:
Tonight: Some early showers/storms, especially west. Turning partly cloudy, warm and muggy with areas of fog. Lows: 70s. Winds: S Light.
Monday: Partly cloudy, hot and humid. Isolated PM storms, locally heavy/strong. Heat index 100 – 105. Highs: 91 – 97. Winds: S 5 – 10.
Tuesday: Partly cloudy, hot and humid. Scattered PM storms, some heavy/strong. Heat Index 98 – 104. Highs: 90 – 95. Winds: S 5 – 10.

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EXTENDED FORECAST:
The 90s last through Thursday with daily storm coverage on the rise ahead of a cold front Scattered storms are possible each afternoon through Thursday. Some storms could be locally heavy/strong. Behind the cold front, canadian high pressure brings a drop in storm chances, temps, and humidity for Friday through the weekend.

Wednesday: Partly sunny, very hot and humid with scattered PM storms, some heavy/strong. Highs: Mid 90s. Heat Index: Around 100.
Thursday: Partly sunny, hot and humid with scattered PM storms, some heavy/strong. Highs: Around 90.
Friday: Partly cloudy, not as hot and much less humid. Chance of a shower/storm south. Highs: Mid 80s.
Saturday: Mostly sunny and gorgeous. Highs: Mid 80s.
Sunday: Mostly sunny and pleasant. Highs: Mid 80s.

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Topper Shutt: @TenaciousTopper

Melissa Nord: @MelissaNordWx

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