Alert archive / West Virginia / Flash Flood Watches in 2016

Flash Flood Watch 15, NWS Charleston, WV

December 17, 201611 counties in West Virginia

NWS Charleston, WV issued this flash flood watch at Dec 17, 2016, 5:11 PM EST for 11 counties in West Virginia. It took effect at Dec 18, 2016, 12:00 AM EST. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Dec 17, 2016, 5:11 PM EST (22:11 UTC)
In effect from: Dec 18, 2016, 12:00 AM EST
Expired: Dec 18, 2016, 12:00 PM EST
In force: 12 hr
Issued by: NWS Charleston, WV
Flood severity: None

Counties Barbour County, WV, Doddridge County, WV, Gilmer County, WV, Harrison County, WV, Lewis County, WV, Pleasants County, WV, Randolph County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV

The radar

The Charleston,WV radar (KRLX), 140 km from the middle of the area, began a volume at 22:14 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

Roanoke, VA (KRNK), launched 12:00Z, 10.2 hours before the alert went out and 234 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: 724 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 613 m²/s²
0-3 km storm-relative helicity: 761 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 flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, WV wrote its last area forecast discussion before this flash flood watch went out at Dec 17, 2:56 PM EST, 2 hours 15 minutes earlier.

Area forecast discussion, Dec 17, 2:56 PM EST, 2 hours 15 minutes before

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Hazardous weather outlook, Dec 17, 3:05 PM EST, 2 hours 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 17, 9:11 AM EST	Freezing Rain Advisory	RLX	Pocahontas	109 min
Dec 17, 2:54 PM EST	Wind Advisory	RLX	Fayette, Nicholas, Pocahontas, Raleigh, Randolph, Webster	16 hr

Nearby

Flash Flood Watches in West Virginia, 2016 Every flash flood watch 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.