Once rainfall ends a period of gusts 35-45 mph are likely overnight from the northwest.
Winds may still gust to 33 mph tomorrow with sun & some increasing clouds. Highs of 44-49 are likely after 32-36 in the morning (with wind chills 19-26).
Wave of wet snow is likely Saturday.
A period of wet snow is still likely Saturday morning to late afternoon/early evening. It appears that highs of 36-40 initially will drop to 32-34 due to wet-bulbing with the snow. This evaporative cooling will occur as the precipitation reaches the ground.
Even now, there is still considerable uncertainties on exact storm track & snowfall amounts. This is what I do know:
1. There will likely be a narrow band of heavy snow with +2" accumulations that occurs in Illinois to Indiana, but where exactly that sets up is in question. This would be a band of intense frontogenetic forcing in the Snow Growth Zone (SGZ). Good moisture in that zone & ideal temperatures should make for excellent snow crystal & thus great, efficient dendrite or flake development.
2. If that band shifts into our area & we get 1" per hour rates, totals will go up quickly, but such a band looks to be rather narrow. Such rates would make for snowy, slushy, slippery roadways, regardless of ground temperature & air temperature.
3. Right now, "grassy & elevated surface accumulation" still seem like a good wording with "1" of accumulation of less". I went for a persistence forecast of best potential of receiving 1" in our southern areas.
4. Remain weather-aware that changes to this forecast are possible. Snow may decrease here with more of a southerly track or increase with a bit more northerly track or even increase greatly in a narrow zone over the area.
Sunday looks dry & breezy with sunshine & highs in the 40s after 26-30 Sunday morning & 25-30 Monday morning.
Main rains & severe weather risk will occur Thursday & Friday of next week. Before that, rain & isolated t'storms are possible Monday night-Tuesday morning & late Wednesday-Wednesday night.
Another round of warmth with rain, storms & some severe risk is possible around late on March 22-24.
Much colder weather should follow with highs in the 30s & 40s & lows in the 20s.
Here is your updated 7-day forecast:
- March 12, 11 PM Weather Forecast Update
- March 11, 11 PM Weather Forecast Update
- March 26, 12 PM Weather Forecast Update
- March 2, 11 PM Weather Forecast Update
- March 13, 11 PM Weather Forecast Update
- March 17, 11 PM Weather Forecast Update
- March 20, 11 PM Weather Forecast Update
- March 14, 11 PM Weather Forecast Update
- March 11, 11 PM Update
- March 12, 1 PM Weather Update