Area Forecast Discussion
Issued by NWS Columbia, SC

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000 FXUS62 KCAE 200320 AFDCAE Area Forecast Discussion National Weather Service Columbia SC 1020 PM EST Sun Jan 19 2020 .SYNOPSIS... Dry air will filter into the region tonight with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region. Moderating temperatures expected late week, with some moisture return possible by Friday. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... Broad upper trough over the eastern CONUS with near zonal flow across the Carolinas. High and mid level clouds have exited the area with clear skies overnight and winds becoming northerly behind a surface trough currently crossing the Midlands. Strong cold advection overnight. Surface winds have diminished and will remain 5 to 10 mph overnight. Temperatures falling into the mid to upper 20s most areas except extreme southeast. && .SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY NIGHT/... An upper level shortwave will dig into the eastern US early this week as a dry, cold air mass pushes into the forecast area. This pattern supports dry weather and below normal temperatures during the short term period. Expect highs in the 40s and lows in the 20s. As the vorticity maxima associated with the shortwave swings into the Southeast on Tuesday, cloud cover should increase. The models indicate that moisture will remain shallow during this time and do not favor any measurable precipitation. && .LONG TERM /WEDNESDAY THROUGH SUNDAY/... Dry high pressure will dominate through Thursday night preventing precipitation and supporting near or below normal temperatures. By the end of the work week, high pressure will be pushing off the East Coast allowing moisture to increase across the Southeast. Aloft, a trough will dig into the central US and promote SW mid-level flow over the region. The surface low associated with the upper level trough will develop west of the forecast area and may bring a cold front through the Southeast near the end of the long term. This pattern generally favors near or above normal temperatures and a high chance of showers Friday and Saturday. && .AVIATION /03Z MONDAY THROUGH FRIDAY/... High confidence in VFR conditions through the period. High pressure along with cooler and drier air have built into the region which will keep skies clear through the period. Wind gusts have diminished however winds will continue veering to northerly over the next couple of hours with speeds remaining 6 to 9 knots through the end of the period. With the drier air and light winds fog is not expected tonight. EXTENDED AVIATION OUTLOOK...No significant impacts to aviation expected through Friday. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. && $$

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