Alert archive / Virginia / Mesoscale Discussions in 2007

Mesoscale Discussion 1812

August 19, 20075 counties in Maryland; 15 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 19, 2007, 11:58 PM EDT for 5 counties in Maryland; 15 counties in Virginia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Aug 19, 2007, 11:58 PM EDT (03:58 UTC)
Expired
Aug 20, 2007, 1:30 AM EDT
In force
92 min
Issued by
the Storm Prediction Center

Counties Dorchester County, MD, Saint Mary's County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Accomack County, VA, City of Poquoson, VA, Essex County, VA, Gloucester County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA, York County, VA

The radar

The Norfolk radar (KAKQ), 121 km from the middle of the area, began a volume at 03:59 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, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 19, 8:14 PM EDTMesoscale DiscussionSPCCalvert, Caroline, Charles, Dorchester, Prince George's, Saint Mary's and 4 more91 min
Aug 20, 12:18 PM EDTMesoscale DiscussionSPCGarrett117 min
Aug 20, 1:19 PM EDTSevere Thunderstorm WatchSPCGarrett7 hr
Aug 20, 7:11 PM EDTMesoscale DiscussionSPCAllegany, Anne Arundel, Baltimore, Calvert, Caroline, Carroll and 17 more94 min
Aug 19, 8:39 PM EDTSevere Thunderstorm WatchSPCAccomack, Amelia, Caroline, Charles City, Chesterfield, Cumberland and 40 more5 hr

Nearby

Mesoscale Discussions in Virginia, 2007Mesoscale Discussions in Maryland, 2007Every mesoscale discussion in 2007

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.