Alert archive / Virginia / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 56

March 1, 20175 states

The Storm Prediction Center issued this severe thunderstorm watch at Mar 1, 2017, 10:38 AM EST for 5 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Mar 1, 2017, 10:38 AM EST (15:38 UTC)
Expired: Mar 1, 2017, 3:01 PM EST
In force: 4 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 117 counties

Allegany County, MD, 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, Saint Mary's County, MD, Washington County, MD, Alleghany County, NC, Ashe County, NC, Caswell County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Watauga County, NC, Wilkes County, NC, Yadkin County, NC, Adams County, PA, Bedford County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, Somerset County, PA, York County, PA, Albemarle County, VA, Alleghany County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Bland County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Carroll County, VA, Charlotte County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Covington, VA, City of Danville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Galax, VA, City of Harrisonburg, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Martinsville, VA, City of Radford, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Waynesboro, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Culpeper County, VA, Fairfax County, VA, Fauquier County, VA, Floyd County, VA, Franklin County, VA, Frederick County, VA, Giles County, VA, Grayson County, VA, Greene County, VA, Halifax County, VA, Henry County, VA, Highland County, VA, King George County, VA, Loudoun County, VA, Madison County, VA, Montgomery County, VA, Nelson County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Prince William County, VA, Pulaski County, VA, Rappahannock County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Smyth County, VA, Spotsylvania County, VA, Stafford County, VA, Tazewell County, VA, Warren County, VA, Wythe County, VA, Berkeley County, WV, Grant County, WV, Greenbrier County, WV, Hampshire County, WV, Hardy County, WV, Jefferson County, WV, Mercer County, WV, Mineral County, WV, Monroe County, WV, Morgan County, WV, Pendleton County, WV, Summers County, WV

The radar

The Sterling radar (KLWX), 155 km from the middle of the area, began a volume at 15:39 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 70%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 20%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Mar 1, 10:43 AM EST	Severe Thunderstorm Warning	RNK	Bland, Tazewell	62 min
Mar 1, 10:52 AM EST	Severe Thunderstorm Warning	RNK	Bland, Smyth, Tazewell	38 min
Mar 1, 11:18 AM EST	Severe Thunderstorm Warning	RNK	Bland, Craig, Giles, Pulaski	42 min
Mar 1, 11:21 AM EST	Severe Thunderstorm Warning	RNK	Alleghany, Bath, City of Covington	39 min
Mar 1, 11:30 AM EST	Severe Thunderstorm Warning	RNK	Bland, Pulaski, Smyth, Wythe, City of Radford	60 min
Mar 1, 11:42 AM EST	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt, Craig, Giles, Montgomery, Roanoke	48 min
Mar 1, 11:56 AM EST	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Greene, Highland, Nelson, Page and 6 more	49 min
Mar 1, 11:57 AM EST	Severe Thunderstorm Warning	RNK	Amherst, Bedford, Botetourt, Rockbridge, City of Buena Vista, City of Lexington	63 min
Mar 1, 12:00 PM EST	Severe Thunderstorm Warning	RNK	Bedford, Floyd, Franklin, Montgomery, Roanoke, City of Roanoke and 1 more	60 min
Mar 1, 12:06 PM EST	Severe Thunderstorm Warning	CTP	Bedford, Fulton, Huntingdon	24 min
Mar 1, 12:12 PM EST	Severe Thunderstorm Warning	LWX	Allegany, Washington	33 min
Mar 1, 12:26 PM EST	Severe Thunderstorm Warning	LWX	Albemarle, Clarke, Culpeper, Fauquier, Frederick, Greene and 9 more	49 min
Mar 1, 12:32 PM EST	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Greene, Madison, Nelson, Orange and 2 more	43 min
Mar 1, 12:33 PM EST	Severe Thunderstorm Warning	RNK	Amherst, Appomattox, Buckingham, Campbell, City of Lynchburg	58 min
Mar 1, 12:42 PM EST	Severe Thunderstorm Warning	LWX	Frederick, Washington	48 min
Mar 1, 12:43 PM EST	Severe Thunderstorm Warning	RNK	Appomattox, Bedford, Campbell, Halifax, Pittsylvania, City of Lynchburg	45 min
Mar 1, 1:05 PM EST	Severe Thunderstorm Warning	LWX	Charles, Montgomery, Prince George's	40 min
Mar 1, 1:14 PM EST	Severe Thunderstorm Warning	LWX	Baltimore, Carroll, Frederick, Howard, Montgomery, Prince George's	46 min
Mar 1, 1:35 PM EST	Severe Thunderstorm Warning	CTP	Adams, Lancaster, York	70 min
Mar 1, 1:36 PM EST	Severe Thunderstorm Warning	LWX	Calvert, Charles, Prince George's, Saint Mary's	54 min
Mar 1, 1:40 PM EST	Severe Thunderstorm Warning	LWX	Anne Arundel, Calvert, Charles, Montgomery, Prince George's	50 min
Mar 1, 1:47 PM EST	Severe Thunderstorm Warning	LWX	Anne Arundel, Baltimore, Carroll, Harford, Howard, Montgomery and 2 more	58 min
Mar 1, 2:21 PM EST	Severe Thunderstorm Warning	LWX	Saint Mary's	28 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

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
Mar 1, 9:44 AM EST	Mesoscale Discussion	SPC	Allegany, Baltimore, Carroll, Charles, Frederick, Garrett and 6 more	91 min
Mar 1, 12:25 PM EST	Mesoscale Discussion	SPC	Baltimore, Carroll, Frederick, Howard, Montgomery, Washington and 1 more	65 min
Mar 1, 12:50 PM EST	Mesoscale Discussion	SPC	Caroline, Dorchester, Saint Mary's, Somerset, Wicomico, Worcester	55 min
Mar 1, 1:13 PM EST	Severe Thunderstorm Watch	SPC	Caroline, Cecil, Dorchester, Kent, Queen Anne's, Somerset and 3 more	4 hr
Mar 1, 2:50 PM EST	Mesoscale Discussion	SPC	Caroline, Cecil, Dorchester, Queen Anne's, Somerset, Talbot and 2 more	55 min
Mar 1, 12:48 PM EST	Tornado Watch	SPC	Cherokee, Clay	6 hr
Mar 1, 2:07 PM EST	Mesoscale Discussion	SPC	Alexander, Buncombe, Burke, Cabarrus, Catawba, Cleveland and 16 more	113 min
Mar 1, 3:02 PM EST	Severe Thunderstorm Watch	SPC	Alamance, Alexander, Anson, Avery, Buncombe, Burke and 43 more	7 hr
Mar 1, 6:21 PM EST	Mesoscale Discussion	SPC	Alamance, Anson, Beaufort, Bertie, Bladen, Cabarrus and 40 more	114 min
Mar 1, 2:19 AM EST	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Cambria, Clarion and 13 more	86 min
Mar 1, 3:56 PM EST	Mesoscale Discussion	SPC	Beaver, Butler, Crawford, Lawrence, Mercer, Venango and 1 more	2 hr
Mar 1, 6:28 AM EST	Mesoscale Discussion	SPC	Dickenson, Lee, Wise	2 hr
Mar 1, 7:47 AM EST	Severe Thunderstorm Watch	SPC	Buchanan, Dickenson, Lee, Russell, Scott, Washington and 3 more	5 hr
Mar 1, 8:28 AM EST	Mesoscale Discussion	SPC	Buchanan, Dickenson, Lee, Russell, Scott, Tazewell and 2 more	92 min
Mar 1, 2:32 AM EST	Mesoscale Discussion	SPC	Boone, Cabell, Calhoun, Clay, Fayette, Jackson and 12 more	88 min
Mar 1, 6:48 AM EST	Severe Thunderstorm Watch	SPC	Barbour, Braxton, Cabell, Calhoun, Clay, Doddridge and 19 more	5 hr

Nearby

Severe Thunderstorm Watches in Virginia, 2017 Severe Thunderstorm Watches in Maryland, 2017 Severe Thunderstorm Watches in West Virginia, 2017 Every severe thunderstorm watch in 2017

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.