Alert archive / Virginia / Special Weather Statements in 2018

Special Weather Statement, NWS Morristown, TN

February 25, 2018Lee County, Wise County, City of Norton, Virginia

NWS Morristown, TN issued this special weather statement at Feb 25, 2018, 4:21 AM EST for Lee County, Wise County, City of Norton, Virginia. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Feb 25, 2018, 4:21 AM EST (09:21 UTC)
Expired
Feb 25, 2018, 5:15 AM EST
In force
54 min
Issued by
NWS Morristown, TN

Counties City of Norton, VA, Lee County, VA, Wise County, VA

The radar

The Jackson,KY radar (KJKL), 86 km from the middle of the area, began a volume at 09:22 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 9.4 hours before the alert went out and 293 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, Cncnati-Daytn, OH at 00:00Z on 2018-02-25Temperature 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, Cncnati-Daytn, OH at 00:00Z on 2018-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 227 square meters per square second.1939587897Sfc1 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
572 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
227 m²/s²
0-3 km storm-relative helicity
266 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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The office that day

Everything else NWS Morristown, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 25, 1:25 AM ESTSpecial Weather StatementMRXMorgan, Scott50 min
Feb 25, 2:54 AM ESTSpecial Weather StatementMRXAnderson, Campbell, Morgan, Scott51 min
Feb 25, 3:01 AM ESTSpecial Weather StatementMRXBledsoe, Marion, Rhea, Sequatchie59 min
Feb 25, 3:40 AM ESTSpecial Weather StatementMRXAnderson, Claiborne, Loudon, Roane, Union50 min
Feb 25, 3:55 AM ESTSpecial Weather StatementMRXBradley, Hamilton, McMinn, Marion, Meigs, Rhea and 1 more65 min
Feb 25, 4:24 AM ESTSpecial Weather StatementMRXClaiborne, Grainger, Hancock, Knox, Loudon, Union66 min
Feb 25, 4:55 AM ESTSpecial Weather StatementMRXBradley, McMinn, Monroe, Polk65 min
Feb 25, 5:48 AM ESTSpecial Weather StatementMRXCarter, Cocke, Greene, Johnson, Sevier, Sullivan and 2 more42 min
Feb 25, 3:37 AM ESTSpecial Weather StatementMRXLee, Wise, City of Norton38 min
Feb 25, 5:42 AM ESTSpecial Weather StatementMRXCherokee, Clay63 min

Nearby

Special Weather Statements in Virginia, 2018Every special weather statement in 2018

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.