Alert archive / West Virginia / Special Weather Statements in 2017

Special Weather Statement, NWS Charleston, WV

September 5, 20174 counties in West Virginia

NWS Charleston, WV issued this special weather statement at Sep 5, 2017, 5:50 AM EDT for 4 counties in West Virginia. It was in force for 55 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: Sep 5, 2017, 5:50 AM EDT (09:50 UTC)
Expired: Sep 5, 2017, 6:45 AM EDT
In force: 55 min
Issued by: NWS Charleston, WV

Counties Jackson County, WV, Mason County, WV, Putnam County, WV, Roane County, WV

The radar

The Charleston,WV radar (KRLX), 56 km from the middle of the area, began a volume at 09:53 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, 9.8 hours before the alert went out and 197 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: 1251 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1133 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.9

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

Everything else NWS Charleston, WV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 5, 4:22 AM EDT	Special Weather Statement	RLX	Mason	23 min
Sep 5, 4:27 AM EDT	Special Weather Statement	RLX	Pleasants	48 min
Sep 5, 7:25 AM EDT	Special Weather Statement	RLX	Doddridge, Harrison, Pleasants, Ritchie, Tyler, Wirt and 1 more	65 min
Sep 5, 10:23 AM EDT	Special Weather Statement	RLX	Wayne	52 min
Sep 5, 11:11 AM EDT	Special Weather Statement	RLX	Boone, Lincoln, Logan, Wayne	49 min
Sep 5, 12:44 PM EDT	Special Weather Statement	RLX	Barbour	46 min
Sep 5, 3:17 AM EDT	Special Weather Statement	RLX	Athens, Jackson, Morgan, Vinton	58 min

Nearby

Special Weather Statements in West Virginia, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.