NWS Weather Briefing

This is a message from ReadyChesco.

Emergency Management Partners and Stakeholders,

Attached is the latest weather briefing from the National Weather Service in Mount Holly, NJ regarding the High Impact winter weather event forecasted for tonight into Thursday.

Situation:
Rain will start this evening and then change over to snow late tonight into Thursday from northwest to southeast. A period of heavy accumulating snow is forecasted to occur after the changeover to snow. Thunder snow and rates of 2 inches an hour are possible during the worst part of the storm between 3AM to Noon Thursday. The National Weather Service is currently forecasting 6-8 inches of snow for most of Chester County, with lesser amounts as you get closer to the Maryland border.

Key Updates:
• Timing of the transition from rain to snow remains uncertain and as a result the range of accumulating snow forecasted has been updated to 6-8 inches for most of County, with southern areas of the County receiving closer to 4-6 inches
• EOC will be opening at level III with limited staffing at 3AM Thursday morning

Chester County Forecasted Conditions:
• Anticipated Timing: Tonight into Thursday afternoon
• Temperatures:
Wednesday tonight a low of 31
Thursday high of 31 and low of 12
Friday high of 28 and a low of 26
• Wind: 10-20 mph, with gusts up to 35 mph
• Precipitation: Rain is expected this evening with precipitation turning to snow overnight. Approximately 6-8 inches of snow is forecasted for most of Chester County, with 4-6 inches expected as you get closer to the Maryland border.
• Active watches & warnings: Winter Storm Warning is in effect from Wednesday Feb 8th at Midnight until Thursday evening at 4PM

Impacts:
• Thursday morning commute will be hazardous
• Snow on the initially warmer roads could lead to slushy conditions that will freeze when the quickly temperatures drop overnight
• The heavy snow will make many roads potentially impassable for several hours during the worst part of the storm between 3AM to Noon
• The snow will be wet and heavy in most areas which along with gusty conditions could lead to widespread power outages
• Friday will remain well below freezing, making any untreated roads dangerous

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