Update, Wednesday, Jan. 30, 3:55 p.m.:
Wednesday's inclement weather forced the Fulton County School System to cancel all afternoon and evening activities. While Johns Creek escaped the tornado warnings that have occurred west of town on Wednesday, heavy rain has continued into the afternoon. A tornado watch is in effect until 8 p.m., while a flood watch and wind advisory remain in effect until midnight.
Thursday is expected to bring mostly sunny skies with highs only reaching 46, thanks to Wednesday's cold front.
Original story, Wednesday, Jan. 30, 10:30 a.m.:
A wind advisory, which warns of gusts up to 40 mph, which can make driving difficult, is in effect through midnight for most of north and central Georgia, including Johns Creek and North Fulton County.
A tornado watch also is in effect until 4 p.m., including North Fulton County.
"Showers and a few thunderstorms will accompany these winds, but it should be noted that very strong winds will be possible outside of any shower or thunderstorm activity as well," the advisory says. "Recent rains and the additional heavy rainfall anticipated from this system will allow for trees to be uprooted with greater ease."
A squall line capable of producing widespread damaging winds and isolated tornadoes is expected to cross the area Wednesday night, according to NWS' hazardous weather outlook. Frequent cloud-to-ground lightning and heavy rainfall also can be expected with thunderstorms.
Johns Creek has on tap for Wednesday a 100 percent chance of showers and thunderstorms, some of which could be severe, according to the NWS forecast. The high should reach 66 and gusts of wind could be up to 36 mph before the low Wednesday night dips to around 35 and the windy weather tapers off.