Tenacious Topper's 3 Degree Guarantee

I am predicting a high temperature of 78º Monday with scattered showers and thunderstorms, a YELLOW WEATHER ALERT DAY.

-----Topper Shutt is rated as the most accurate weather forecaster in Washington, D.C.

Don't believe the data? He's backing it up by providing a daily '3 Degree Guarantee' of the high temperatures at Reagan National Airport.

Each day we'll post the new guarantee, and Topper will share the results each night on WUSA9 at 11. Follow @TenaciousTopper on Twitter and Instagram for 'round the clock weather updates.

© 2017 WUSA-TV


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