No Watches/Warnings or Advisories at this time. National Weather Service Forecast Fairfax fairfax- including the cities of reston, herndon, annandale, centreville, chantilly, mclean, and franconia 730 AM EDT TUE AUG 22 2017 TODAY Mostly sunny. Hot with highs in the mid 90s. Southwest winds 5 to 10 mph. TONIGHT Mostly cloudy with a chance of showers and thunderstorms. Lows in the mid 70s. Southwest winds 10 to 15 mph, becoming west around 5 mph after midnight. Chance of rain 50 percent. WEDNESDAY Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Highs in the mid 80s. Northwest winds 5 to 10 mph. Chance of rain 50 percent. WEDNESDAY NIGHT Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 50 percent. THURSDAY Mostly sunny. Highs around 80. North winds around 5 mph. THURSDAY NIGHT Partly cloudy. Lows in the lower 60s. FRIDAY Sunny. Highs in the upper 70s. FRIDAY NIGHT Mostly clear. Lows in the upper 50s. SATURDAY Sunny. Highs in the upper 70s. SATURDAY NIGHT Mostly clear. Lows around 60. SUNDAY Mostly sunny. Highs in the upper 70s. SUNDAY NIGHT Partly cloudy. Lows in the lower 60s. MONDAY Mostly sunny. Highs in the upper 70s.