South-central Wisconsin is under a dense fog advisory until 10 a.m. Thursday, but sunshine should be seen later in the day, with a high cracking 80 as the area’s stretch of sublime weather continues, according to forecasters.
Visibility could be reduced to a quarter-mile or less in some areas, the National Weather Service said.
In Madison on Thursday, look for areas of fog before noon, otherwise mostly cloudy skies through mid-morning, then gradual clearing, with a high near 81 and calm wind becoming south winds around 5 miles per hour in the morning.
After an overnight low around 60, Friday should be mostly sunny, with a high near 82 and south winds at 5 to 10 mph.
After a low overnight Friday into Saturday around 64, Saturday should be sunny, with a high near 84 and south winds at 5 to 15 mph.
The Weather Service said chances for showers and thunderstorms return at 40 percent Saturday night after 2 a.m., 50 percent Sunday mainly before 2 p.m., 20 percent Sunday night before 8 p.m., 20 percent Monday after 2 p.m., 40 percent Monday night mainly after 8 p.m., and 30 percent Tuesday through Wednesday.
Skies over Madison should be mostly cloudy Sunday, partly sunny Monday, and mostly sunny Tuesday and Wednesday, with highs near 76, 74, 77 and 78, and overnight lows around 65, 56, 58 and 61.
27 Storm Track meteorologist Branden Borremans forecasts areas of fog with increasing sunshine Thursday as warm temperatures continue, a few showers and thundershowers late Saturday night into Sunday morning, and a possible shower or thundershower Monday night.
Borremans said skies over Madison should be sunny Thursday, mostly sunny Friday, partly sunny Saturday, cloudy with increasing sunshine Sunday, and partly sunny Monday through next Thursday, with highs near 83, 85, 85, 78,75, 80, 83 and 85, and overnight lows around 62, 65, 67, 54, 59, 62, 65 and 66.
Wednesday’s high in Madison was 82 at 3:50 p.m., 9 degrees above the normal high and 11 degrees below the record high of 93 for Sept. 13, set in 1939.
Wednesday’s low in Madison was 50 at 5:11 a.m., 1 degree below the normal low and 19 degrees above the record low of 31 for Sept. 13, set in 1964.
No precipitation was recorded at the Dane County Regional Airport on Wednesday, leaving Madison’s September and meteorological fall (September through November) precipitation total (rain plus snow converted to liquid) at 0.14 inches, 1.3 inches below normal. The 2017 total stayed at 32.9 inches, 6.64 inches above normal.
Madison’s record precipitation for Sept. 13 is 2.34 inches in 1961.