Alert archive / Pennsylvania / Mesoscale Discussions in 2015

Mesoscale Discussion 1725

August 20, 20155 states

The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2015, 3:45 PM EDT for 5 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Aug 20, 2015, 3:45 PM EDT (19:45 UTC)
Expired: Aug 20, 2015, 6:15 PM EDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 69 counties

Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Carroll County, MD, Charles County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Broome County, NY, Cayuga County, NY, Chemung County, NY, Cortland County, NY, Jefferson County, NY, Madison County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Yates County, NY, Adams County, PA, Berks County, PA, Bradford County, PA, Clinton County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Wyoming County, PA, York County, PA, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Manassas, VA, City of Manassas Park, VA, Clarke County, VA, Fairfax County, VA, Fauquier County, VA, King George County, VA, Loudoun County, VA, Prince William County, VA, Stafford County, VA, Berkeley County, WV, Jefferson County, WV

The radar

The Binghamton radar (KBGM), 82 km from the middle of the area, began a volume at 19:45 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.

Issued	Product	Office	Counties	Lasted
Aug 20, 11:49 AM EDT	Mesoscale Discussion	SPC	Allegany, Baltimore, Carroll, Frederick, Garrett, Howard and 2 more	2 hr

Nearby

Mesoscale Discussions in Pennsylvania, 2015 Mesoscale Discussions in New York, 2015 Mesoscale Discussions in Virginia, 2015 Every mesoscale discussion in 2015

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.