12/9 – Brittany’s “Pleasant End To The Workweek” Friday Evening Forecast
There continues to be high confidence in another round of widespread dense fog tonight. Expect fog to begin earliest near the coast and around the tidal lakes, spreading inland by about midnight. Once it sets in, it should stick around until daybreak before beginning to mix out after sunrise. Areas away from water sources will likely see fog dissipate a little earlier than areas nearest the coast, tidal lakes and Mississippi River. A dense fog advisory has been issued for the entire area and will be in effect from 9pm this evening through 10am tomorrow.
An upper long wave trough currently located near the west coast will fragment tonight as the northern stream portion of the trough becomes negatively tilted and lifts northeastward, leaving behind a southern stream shortwave over the southwestern CONUS. This shortwave is what will bring us some weather impacts on Sunday. The disturbance will move eastward through Texas tomorrow, and the lower Mississippi Valley on Sunday. Doesn`t look to be much of a severe weather threat, but with ample moisture in place, the shortwave and weak forcing should still be enough to fire off scattered to numerous showers and some embedded thunderstorms. Rain chances will be highest across northwestern areas as it does appear the showers and storms will dissipate somewhat as they move eastward through the local area. the shortwave will also push a weak cold front through the area, but don`t expect much in the way of a cool down. Dewpoints and overnight lows might drop a couple degrees, but overall it will remain much warmer than normal for this time of year.
Monday will see some brief ridging which will keep us mostly dry for the day, but can`t rule out a couple brief showers. Heading into Tuesday we start to see our next system take shape as a strong upper level closed-off low drifts across the western U.S. and into the central Plains. As this happens a strong surface cold front will start to form at the surface, eventually racing across our CWA. This will introduce widespread rain chances and the potential for severe weather.
Following the cold front passage, whether that be earlier or later Wednesday, we will have a decent cool down and conditions will dry out. Highs will struggle to reach the 60s and lows will drop into the 40s.