Alert archive / West Virginia / Flash Flood Watches in 2017

Flash Flood Watch 14, NWS Charleston, WV

July 28, 201710 counties in West Virginia

NWS Charleston, WV issued this flash flood watch at Jul 28, 2017, 8:05 PM EDT for 10 counties in West Virginia. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Jul 28, 2017, 8:05 PM EDT (00:05 UTC)
Expired: Jul 29, 2017, 8:00 AM EDT
In force: 12 hr
Issued by: NWS Charleston, WV

Counties Barbour County, WV, Doddridge County, WV, Harrison County, WV, Lewis County, WV, Pocahontas County, WV, Randolph County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Webster County, WV

The radar

The Charleston,WV radar (KRLX), 145 km from the middle of the area, began a volume at 00:05 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

Pittsburgh, PA (KAGC), launched 00:00Z, 0.1 hours before the alert went out and 158 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: 732 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: -24 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.5

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 Jul 28, 2:52 PM EDT, 5 hours 13 minutes earlier.

Area forecast discussion, Jul 28, 2:52 PM EDT, 5 hours 13 minutes before

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Hazardous weather outlook, Jul 28, 3:16 AM EDT, 16 hours 49 minutes before

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In the hours before

Local storm report, Jul 28, 2:31 PM EDT, 5 hours 34 minutes before

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Special weather statement, Jul 28, 2:55 PM EDT, 5 hours 10 minutes before

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Local storm report, Jul 28, 3:21 PM EDT, 4 hours 44 minutes before

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Local storm report, Jul 28, 3:34 PM EDT, 4 hours 31 minutes before

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Local storm report, Jul 28, 3:46 PM EDT, 4 hours 19 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
Jul 28, 11:41 PM EDT	Special Weather Statement	RLX	Taylor	34 min
Jul 29, 12:23 AM EDT	Flash Flood Warning	RLX	Harrison	6 hr
Jul 29, 1:23 AM EDT	Flash Flood Warning	RLX	Doddridge, Harrison	4 hr
Jul 29, 3:09 AM EDT	Flash Flood Warning	RLX	Harrison, Lewis	3 hr
Jul 29, 5:21 AM EDT	Special Weather Statement	RLX	Barbour, Taylor	54 min
Jul 29, 6:03 AM EDT	Areal Flood Warning	RLX	Harrison	15 hr
Jul 29, 6:32 AM EDT	Areal Flood Warning	RLX	Barbour, Randolph, Taylor	3 hr

Nearby

Flash Flood Watches in West Virginia, 2017 Every flash flood watch 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.