Alert archive / West Virginia / Flash Flood Watches in 2020

Flash Flood Watch 8, NWS Charleston, WV

August 14, 202033 counties in West Virginia; 8 counties in Ohio; 4 counties in Kentucky

NWS Charleston, WV issued this flash flood watch at Aug 14, 2020, 1:01 PM EDT for 33 counties in West Virginia; 8 counties in Ohio; 4 counties in Kentucky. It took effect at Aug 14, 2020, 5:00 PM EDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Aug 14, 2020, 1:01 PM EDT (17:01 UTC)
In effect from: Aug 14, 2020, 5:00 PM EDT
Expired: Aug 15, 2020, 2:00 PM EDT
In force: 21 hr
Issued by: NWS Charleston, WV
Flood severity: None

All 45 counties

Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Morgan County, OH, Vinton County, OH, Washington County, OH, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Pleasants County, WV, Pocahontas County, WV, Putnam County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wood County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 47 km from the middle of the area, began a volume at 17:01 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 12:00Z, 5.0 hours before the alert went out and 216 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: 336 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 8 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 Aug 14, 10:25 AM EDT, 2 hours 36 minutes earlier.

Area forecast discussion, Aug 14, 10:25 AM EDT, 2 hours 36 minutes before

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Hazardous weather outlook, Aug 14, 3:29 AM EDT, 9 hours 32 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
Aug 13, 8:05 PM EDT	Special Weather Statement	RLX	Lincoln	25 min
Aug 13, 11:21 PM EDT	Special Weather Statement	RLX	Mason	39 min
Aug 14, 7:19 PM EDT	Special Weather Statement	RLX	Wayne	56 min
Aug 14, 7:15 PM EDT	Special Weather Statement	RLX	Elliott	30 min

Nearby

Flash Flood Watches in West Virginia, 2020 Flash Flood Watches in Ohio, 2020 Flash Flood Watches in Kentucky, 2020 Every flash flood watch in 2020

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.