Alert archive / West Virginia / Mesoscale Discussions in 2020

Mesoscale Discussion 1852

December 16, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Dec 16, 2020, 8:38 AM EST for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Dec 16, 2020, 8:38 AM EST (13:38 UTC)
Expired: Dec 16, 2020, 2:15 PM EST
In force: 6 hr
Issued by: the Storm Prediction Center
Concerning: Heavy snow

All 23 counties

Allegany County, MD, Washington County, MD, Bedford County, PA, Fulton County, PA, City of Harrisonburg, VA, City of Winchester, VA, Clarke County, VA, Frederick County, VA, Highland County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV, Pocahontas County, WV, Randolph County, WV, Tucker County, WV

The radar

The Sterling radar (KLWX), 123 km from the middle of the area, began a volume at 13:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 16, 1:57 PM EST	Mesoscale Discussion	SPC	Allegany, Carroll, Frederick, Montgomery, Washington	5 hr
Dec 16, 6:48 PM EST	Mesoscale Discussion	SPC	Carbon, Columbia, Lackawanna, Luzerne, Monroe, Northampton and 5 more	5 hr
Dec 16, 6:36 AM EST	Mesoscale Discussion	SPC	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 22 more	4 hr

Nearby

Mesoscale Discussions in West Virginia, 2020 Mesoscale Discussions in Virginia, 2020 Mesoscale Discussions in Maryland, 2020 Every mesoscale discussion in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.