The National Weather Service expects at least half an inch of snow in 19 tracked cities in the next 24 hours — the most in Chicago Heights, IL (3.1″). Over the next three days: Chicago Heights, IL, about 3.4″. 7 winter storm, blizzard or ice warnings are in effect. One map, the whole snow story: what fell (last 24, 48, 72 hours and the season), what is on the ground now, and what the National Weather Service expects in the next three days — switch with the bar at the bottom, or press ▶ to play it. Updated every hour from official NOAA data.
National Weather Service gridded forecast (NDFD), issued Nov 12, 7:00 PM ET. Three 24-hour periods from then: Fri, Nov 13, Sat, Nov 14, Sun, Nov 15.
| # | City | Expected |
|---|---|---|
| 1 | Chicago Heights IL | 3.1″ |
| 2 | Hammond IN | 2.8″ |
| 3 | Merrillville IN | 2.6″ |
| 4 | Calumet City IL | 1.8″ |
| 5 | Ithaca NY | 1.2″ |
| 6 | Valparaiso IN | 0.9″ |
| 7 | Tinley Park IL | 0.8″ |
| 8 | Portage IN | 0.8″ |
| 9 | Oak Lawn IL | 0.7″ |
| 10 | Syracuse NY | 0.6″ |
| 11 | Flint MI | 0.6″ |
| 12 | Orland Park IL | 0.6″ |
| 13 | Binghamton NY | 0.6″ |
| 14 | Cicero NY | 0.6″ |
| 15 | Cicero IL | 0.5″ |
| 16 | Gary IN | 0.5″ |
| 17 | Schenectady NY | 0.5″ |
| 18 | Clay NY | 0.5″ |
| 19 | Clifton Park NY | 0.5″ |
| 20 | Waukegan IL | 0.4″ |
| 21 | Utica NY | 0.4″ |
| 22 | Berwyn IL | 0.4″ |
| 23 | Oak Park IL | 0.4″ |
| 24 | Concord NH | 0.4″ |
| 25 | East Concord NH | 0.4″ |
| # | City | 3 days | Day 1 · 2 · 3 |
|---|---|---|---|
| 1 | Chicago Heights IL | 3.4″ | 3.1″ · 0.3″ · 0 |
| 2 | Hammond IN | 2.8″ | 2.8″ · 0 · 0 |
| 3 | Merrillville IN | 2.6″ | 2.6″ · 0 · 0 |
| 4 | Calumet City IL | 1.8″ | 1.8″ · 0 · 0 |
| 5 | Ithaca NY | 1.5″ | 1.2″ · 0.3″ · 0 |
| 6 | Valparaiso IN | 1.1″ | 0.9″ · 0.2″ · 0 |
| 7 | Tinley Park IL | 1.0″ | 0.8″ · 0.2″ · 0 |
| 8 | Cicero NY | 0.9″ | 0.6″ · 0.3″ · 0 |
| 9 | Syracuse NY | 0.8″ | 0.6″ · 0.2″ · 0 |
| 10 | Orland Park IL | 0.8″ | 0.6″ · 0.2″ · 0 |
| 11 | Clay NY | 0.8″ | 0.5″ · 0.3″ · 0 |
| 12 | Portage IN | 0.8″ | 0.8″ · 0 · 0 |
| 13 | Oak Lawn IL | 0.8″ | 0.7″ · 0.1″ · 0 |
| 14 | Flint MI | 0.6″ | 0.6″ · 0 · 0 |
| 15 | Cicero IL | 0.6″ | 0.5″ · 0.1″ · 0 |
| 16 | Binghamton NY | 0.6″ | 0.6″ · 0 · 0 |
| 17 | Gary IN | 0.5″ | 0.5″ · 0 · 0 |
| 18 | Schenectady NY | 0.5″ | 0.5″ · 0 · 0 |
| 19 | Berwyn IL | 0.5″ | 0.4″ · 0.1″ · 0 |
| 20 | Oak Park IL | 0.5″ | 0.4″ · 0.1″ · 0 |
| 21 | Clifton Park NY | 0.5″ | 0.5″ · 0 · 0 |
| 22 | Waukegan IL | 0.4″ | 0.4″ · 0 · 0 |
| 23 | Utica NY | 0.4″ | 0.4″ · 0 · 0 |
| 24 | Mansfield OH | 0.4″ | 0 · 0.4″ · 0 |
| 25 | Altoona PA | 0.4″ | 0.1″ · 0.3″ · 0 |
21 snow and ice alerts are in effect (7 warnings). Every alert, with its zone outline and full NWS text, is on the Winter Storm Map →
City snowfall averages, live alerts and the local 7-day snow forecast for 1,548 US cities.
It is the official National Weather Service forecast (National Digital Forecast Database, 2.5-km grid) — the same numbers behind the snowfall forecasts on weather.gov, summed into three 24-hour periods.
They are the NOAA Weather Prediction Center winter probabilities: the chance that at least that much snow falls during that day. A 40% chance of 8″ means 8 inches or more is quite possible but not the most likely outcome.
Day 1 is usually good to within a few inches; by day 3 the storm track can still shift 50–100 miles, which can change a forecast from rain to a foot of snow. Check back — the map updates every hour.
No. It shows official NWS and NOAA data, but always follow your local NWS office, local officials and phone alerts for warnings.