Alert archive / Pennsylvania / Mesoscale Discussions in 2020

Mesoscale Discussion 1599

August 27, 2020Columbiana County, Mahoning County, Ohio; 15 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Aug 27, 2020, 4:34 PM EDT for Columbiana County, Mahoning County, Ohio; 15 counties in Pennsylvania. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Aug 27, 2020, 4:34 PM EDT (20:34 UTC)
Expired: Aug 27, 2020, 6:00 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch possible
Chance of a watch: 60%

Counties Columbiana County, OH, Mahoning County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, Mifflin County, PA

The radar

The State College radar (KCCX), 85 km from the middle of the area, began a volume at 20:38 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 459Aug 27, 5:30 PM EDT

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
Aug 27, 12:38 PM EDT	Mesoscale Discussion	SPC	Susquehanna, Wayne	3 hr
Aug 27, 1:22 PM EDT	Tornado Watch	SPC	Pike, Susquehanna, Wayne	7 hr
Aug 27, 2:14 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Blair, Cambria, Cumberland, Fayette and 6 more	2 hr
Aug 27, 2:49 PM EDT	Severe Thunderstorm Watch	SPC	Bradford, Cameron, Clinton, Elk, Lackawanna, Luzerne and 7 more	5 hr
Aug 27, 5:32 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Allegheny, Armstrong, Beaver, Bedford, Blair and 28 more	4 hr
Aug 27, 6:35 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Berks, Blair, Bucks, Chester and 24 more	115 min

Nearby

Mesoscale Discussions in Pennsylvania, 2020 Mesoscale Discussions in Ohio, 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.