Alert archive / Pennsylvania / Mesoscale Discussions in 2009

Mesoscale Discussion 1672

July 25, 20095 states

The Storm Prediction Center issued this mesoscale discussion at Jul 25, 2009, 3:05 PM EDT for 5 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Jul 25, 2009, 3:05 PM EDT (19:05 UTC)
Expired: Jul 25, 2009, 4:00 PM EDT
In force: 55 min
Issued by: the Storm Prediction Center

All 57 counties

Allegany County, MD, Frederick County, MD, Garrett County, MD, Washington County, MD, Allegany County, NY, Cattaraugus County, NY, Chemung County, NY, Genesee County, NY, Livingston County, NY, Ontario County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Wyoming County, NY, Yates County, NY, Adams County, PA, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lycoming County, PA, McKean County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Snyder County, PA, Somerset County, PA, Tioga County, PA, Union County, PA, City of Winchester, VA, Clarke County, VA, Frederick County, VA, Loudoun 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

The radar

The State College radar (KCCX), 17 km from the middle of the area, began a volume at 19:08 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 624Jul 25, 3:50 PM EDT

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
Jul 25, 3:50 PM EDT	Severe Thunderstorm Watch	SPC	Allegany, Cattaraugus, Cayuga, Chemung, Erie, Genesee and 13 more	5 hr
Jul 25, 7:43 PM EDT	Mesoscale Discussion	SPC	Allegany, Chemung, Genesee, Livingston, Monroe, Ontario and 5 more	62 min
Jul 25, 12:24 PM EDT	Mesoscale Discussion	SPC	Cabell, Lincoln, Mason, Putnam, Wayne	2 hr

Nearby

Mesoscale Discussions in Pennsylvania, 2009 Mesoscale Discussions in New York, 2009 Mesoscale Discussions in West Virginia, 2009 Every mesoscale discussion in 2009

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.