New snowfall for Chicagoland area and Arlington Heights Friday, January 20, 2012
A total of 5.5 inches of snow fell in Arlington Heights from 9:30 a.m. Friday until 7:00 p.m. Friday. The heaviest snowfall period occurred from 11:30 a.m. until about 5:00 p.m. Light snow is still falling at 7:00 p.m. The trailing edge of precipitation was passing Rockford at 7:15 p.m.
Snow cover at the start of the winter storm was about 2.0 inches. Snow cover at 7:00 p.m. was 7.5 inches. The main area of snowfall settled a little further south over the metropolitan area compared to the forecast. Heavier snow amounts are being measured in Naperville (6.5″), Joliet (6.1″), Bolingbrook (6.7″). Winnetka measured 5.2″ and Zion only 3.8″ at about 7:00 p.m.
The snow is dry and fluffy — not good packing for snowmen and snowballs. Forecast discussion at Friday afternoon favored snow ratios between 14:1 and 15:1.
Chicago Executive Airport
Lat: 42.11 Lon: -87.9 Elev: 646
Last Update on Jan 20, 6:52 pm CST
Humidity: 81 %
Wind Speed: N 3 MPH
Barometer: 30.08″ (1019.9 mb)
Dewpoint: 14 °F (-10 °C)
Visibility: 1.25 mi.
FORECAST (as of FRI JAN 20 2012, 7:30 PM CST) …
Tonight: Snow showers, mainly before midnight. Low around 14. Northeast wind between 5 and 10 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 2 inches possible.
Saturday: A 40 percent chance of snow showers, mainly before 3pm. Partly sunny, with a high near 26. North wind 5 to 10 mph becoming southeast. Winds could gust as high as 15 mph.
Saturday Night: Partly cloudy, with a low around 16. South southeast wind between 5 and 15 mph, with gusts as high as 20 mph.
Sunday: A 20 percent chance of rain after noon. Cloudy, with a high near 39. South wind around 15 mph, with gusts as high as 20 mph.
Sunday Night: Rain likely. Cloudy, with a low around 33. South wind 10 to 15 mph becoming west. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
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