Ridley Park's Online Digital Community
The storm is looking even colder based on the current observations, and is trending about 10 miles more south then currently modeled.
Tonight the snow will start around 12 AM. to 1 AM. and will increase in intensity throughout the overnight hours. The latest high-resolution model guidance (High Rapid Refresh Model
HRRR) indicates that there will be 2"-3" of wet snow already accumulated on the ground by 7AM. In the hours of 7AM. to 10AM. some warm air will work into the storm from the south and the ocean, around 700-850 Millibars (5,000-8,000 feet) into the atmosphere, and depending on how much warm air works onto the system, that will determine if the snowfall stops accumulating at that time. If a small amount of warm air works into the system, the precipitation will be a mixture of snow and sleet. If there is a large amount of warm air that works into the system, than the precipitation will be sleet. The sleet will accumulate 0.05"-0.15", and at the end of the storm, there may be a period of freezing rain at the end. We are currently under a Winter Weather Advisory from 12AM-5PM Tomorrow (issued by the National Weather Service).
NAM NOW (10:30 PM.)
NAM (1:00 AM)
NAM (7AM HEAVY SNOW JUST BEGINNING TO MIX WITH SLEET 2.0"-2.5" INCHES ACCUMULATION BY 3AM
NAM 10 AM (SNOW AND SLEET MIX SNOW ACCUMULATIONS 2.0"-3.0" WITH 0.05" OF ICE ACCUMULATION
NAM 1PM (SLEET AND SNOW AND FREEZING RAIN SNOW ACCUMULATION OF 2.0"-3.0" WITH ICE ACCRETION (ACCUMULATION) OF 0.10"-0.30"
NAM 4PM (ENDING AS FREEZING RAIN)