Alert archive / Virginia / Mesoscale Discussions in 2016

Mesoscale Discussion 51

January 22, 201614 counties in Maryland; 34 counties in Virginia; 20 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jan 22, 2016, 12:34 PM EST for 14 counties in Maryland; 34 counties in Virginia; 20 counties in West Virginia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jan 22, 2016, 12:34 PM EST (17:34 UTC)
Expired
Jan 22, 2016, 5:30 PM EST
In force
5 hr
Issued by
the Storm Prediction Center
All 68 counties

Allegany County, MD, Anne Arundel County, MD, Calvert County, MD, Charles County, MD, Dorchester County, MD, Frederick County, MD, Garrett County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Washington County, MD, Accomack County, VA, Arlington County, VA, Caroline County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Harrisonburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Winchester, VA, Clarke County, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Greene County, VA, King George County, VA, Lancaster County, VA, Loudoun County, VA, Madison County, VA, Northumberland County, VA, Orange County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Rockingham County, VA, Shenandoah County, VA, Spotsylvania County, VA, Stafford County, VA, Warren County, VA, Westmoreland County, VA, Barbour County, WV, Berkeley County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jefferson County, WV, Lewis County, WV, Marion County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Pendleton County, WV, Preston County, WV, Randolph County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV

The radar

The Sterling radar (KLWX), 96 km from the middle of the area, began a volume at 17:34 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.6 hours before the alert went out and 103 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 12:00Z on 2016-01-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2016-01-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -31 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1221 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
-31 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 22, 4:42 PM ESTMesoscale DiscussionSPCCalvert, Charles, Prince George's, Saint Mary's6 hr
Jan 22, 6:47 PM ESTMesoscale DiscussionSPCGarrett5 hr
Jan 22, 4:47 AM ESTMesoscale DiscussionSPCAlleghany, Bath, Bedford, Bland, Botetourt, Buchanan and 26 more5 hr
Jan 22, 8:56 AM ESTMesoscale DiscussionSPCAlbemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 44 more4 hr
Jan 22, 11:47 AM ESTMesoscale DiscussionSPCHenry, Mecklenburg, City of Danville6 hr
Jan 22, 1:56 PM ESTMesoscale DiscussionSPCBoone, Cabell, Kanawha, Lincoln, Logan, Mingo and 2 more4 hr

Nearby

Mesoscale Discussions in Virginia, 2016Mesoscale Discussions in West Virginia, 2016Mesoscale Discussions in Maryland, 2016Every mesoscale discussion in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.