DC SoE
https://www.wusa9.com/article/weather/severe-weather/dc-state-of-emergency-mayor-muriel-bowser-snow-weather/65-30832e93-82c4-4de9-b0ac-64b1f395389a
@Terpeast
Wouldn't this sounding suggest +SN at DCA still at 18z? 700mb to 800mb is nearly isothermal, but just below zero. If rates were to be heavy enough, I guess rimed snow?
https://www.weather.gov/ilm/criteria
Thats what ILM states for ISW:
"Freezing rain is the only or predominate type of wintry precipitation and is expected to accumulate to ¼ inch or greater during a period of 24 hours or less."
I think most of us are pretty set on getting at least 6" of snow. What happens after is up to banding location and other intricacies. As others have mentioned, if we want to get closer to double digit snow amounts in the metros... we want that mix to come closer to 18z