Alert archive / West Virginia / Flash Flood Watches in 2015

Flash Flood Watch 14, NWS Charleston, WV

September 29, 201510 counties in West Virginia; Washington County, Ohio

NWS Charleston, WV issued this flash flood watch at Sep 29, 2015, 1:48 PM EDT for 10 counties in West Virginia; Washington County, Ohio. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Sep 29, 2015, 1:48 PM EDT (17:48 UTC)
Expired: Sep 30, 2015, 2:34 AM EDT
In force: 13 hr
Issued by: NWS Charleston, WV
Flood severity: None

Counties Washington County, OH, Barbour County, WV, Doddridge County, WV, Harrison County, WV, Lewis County, WV, Pleasants County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 134 km from the middle of the area, began a volume at 17:52 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, 5.8 hours before the alert went out and 250 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: 101 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 534 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 309 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 Sep 29, 11:56 AM EDT, 1 hour 52 minutes earlier.

Area forecast discussion, Sep 29, 11:56 AM EDT, 1 hour 52 minutes before

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Hazardous weather outlook, Sep 29, 8:14 AM EDT, 5 hours 34 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
Sep 29, 4:22 PM EDT	Special Weather Statement	RLX	Jackson, Pleasants, Wirt, Wood	113 min
Sep 29, 6:16 PM EDT	Special Weather Statement	RLX	Athens, Gallia, Jackson, Morgan, Perry, Vinton	104 min

Nearby

Flash Flood Watches in West Virginia, 2015 Flash Flood Watches in Ohio, 2015 Every flash flood watch in 2015

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.