A snowstorm delivered a stronger blow than expected to the Madison area overnight, as the axis of heavier snow moved to the north, hitting the area with 5 to 7 inches of snow instead of the predicted 3 to 5 inches, according to forecasters
At about 10:30 p.m. Thursday, the National Weather Service put Dane, Iowa and Jefferson counties under a winter storm warning through 6 a.m. Friday instead of the original winter weather advisory, joining counties to the south and east also under the warning — some until 9 a.m.
While southern Wisconsin was seeing 5 to 7 inches of snow, with the most to the south and least to the north, northern Illinois was seeing 9 to 11 inches and the Chicago area might see more than a foot, the Weather Service said.
The main blow of snow had basically ended in the Madison area by daybreak Friday, but some light snow could linger Friday morning and areas to the south and east could see snow well into Friday.
The Weather Service said light accumulating snow will be possible south of a Beloit to Milwaukee line early Saturday, and again early Sunday, with less than an inch falling.
In Madison on Friday, there’s a 50 percent chance for snow, mainly before 9 a.m., with mostly cloudy skies, a high near 19 and north winds at 5 to 10 miles per hour producing wind chill values of zero to 10.
Overnight into Saturday, there’s a 20 percent chance for snow after 1 a.m. and before 1 p.m., with mostly cloudy skies turning partly sunny, a low around 3 and high near 17.
The Weather Service said the weather then should remain quiet into next week, with just a 20 percent chance for snow Wednesday night, and 50 percent chance Thursday.
Skies over Madison should be mostly cloudy with gradual clearing on Sunday, mostly sunny Monday, partly sunny Tuesday, mostly sunny Wednesday, and partly sunny Thursday, with highs near 22, 23, 29, 32 and 32, and lows Saturday night through Wednesday night around 5, zero, 12, 13 and 20.
27 Storm Track meteorologist Branden Borremans forecasts light snow ending early Friday, a little light snow possible overnight into early Saturday south of Madison, and light rain possible on Thursday.
Borremans said skies over Madison should be partly cloudy Friday, partly sunny Saturday, partly to mostly sunny Sunday, mostly sunny Monday through Wednesday and cloudy Thursday, with highs Friday through next Friday near 19, 18, 23, 26, 31, 35, 38 and 28, and overnight lows around 3, 4, 2, 12, 16, 27, 28 and 8.
Thursday’s high in Madison was 18 at 6:40 p.m., 11 degrees below the normal high and 37 degrees below the record high of 55 for Feb. 8, set in 1925.
Thursday’s low in Madison was 4 below at 12:47 a.m., 17 degrees below the normal low and 18 degrees above the record low of 22 below for Feb. 8, set in 1899.
Officially, 0.09 inches of precipitation was recorded at the Dane County Regional Airport on Thursday, boosting Madison’s February total to 0.58 inches, 0.23 inches above normal. The meteorological winter (December through February) precipitation total (rain plus snow converted to liquid) rose to 2.99 inches, 0.33 inches below normal. Madison’s 2018 precipitation total rose to 2.26 inches, 0.68 inches above normal.
Madison’s record precipitation for Feb. 8 is 0.93 inches in 1900.
The 1.4 inches of snow on Thursday boosted Madison’s February total to 7.8 inches, 4.5 inches above normal. For meteorological winter, Madison has received 21.7 inches, 8 inches below normal. For the snow season (since July 1), Madison has received 22 inches, 11.8 inches below normal.
Madison’s record snowfall for Feb. 8 is 5.2 inches in 1994.
Madison’s official snow depth is 4 inches.