Alert archive / Virginia / Hard Freeze Warnings in 2016

Hard Freeze Warning 1, NWS Blacksburg, VA

April 9, 201622 counties in Virginia; 9 counties in North Carolina

NWS Blacksburg, VA issued this hard freeze warning at Apr 9, 2016, 5:03 AM EDT for 22 counties in Virginia; 9 counties in North Carolina. It took effect at Apr 10, 2016, 12:00 AM EDT. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 9, 2016, 5:03 AM EDT (09:03 UTC)
In effect from: Apr 10, 2016, 12:00 AM EDT
Expired: Apr 10, 2016, 10:00 AM EDT
In force: 10 hr
Issued by: NWS Blacksburg, VA

All 31 counties

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, Amherst County, VA, Appomattox County, VA, Bedford County, VA, Botetourt County, VA, Buckingham County, VA, Campbell County, VA, Charlotte County, VA, City of Buena Vista, VA, City of Danville, VA, City of Lexington, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Roanoke, VA, City of Salem, VA, Franklin County, VA, Halifax County, VA, Henry County, VA, Patrick County, VA, Pittsylvania County, VA, Roanoke County, VA, Rockbridge County, VA, Smyth County, VA

The radar

The Roanoke radar (KFCX), 35 km from the middle of the area, began a volume at 09:05 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 9.1 hours before the alert went out and 96 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2529 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this hard freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this hard freeze warning went out at Apr 9, 1:58 AM EDT, 3 hours 5 minutes earlier.

Area forecast discussion, Apr 9, 1:58 AM EDT, 3 hours 5 minutes before

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Hazardous weather outlook, Apr 8, 4:54 PM EDT, 12 hours 9 minutes before

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Nearby

Hard Freeze Warnings in Virginia, 2016 Hard Freeze Warnings in North Carolina, 2016 Every hard freeze warning 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.