Alert archive / West Virginia / Flash Flood Watches in 2020

Flash Flood Watch 7, NWS Charleston, WV

July 30, 202031 counties in West Virginia; 5 counties in Ohio; 4 counties in Kentucky

NWS Charleston, WV issued this flash flood watch at Jul 30, 2020, 12:22 PM EDT for 31 counties in West Virginia; 5 counties in Ohio; 4 counties in Kentucky. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued: Jul 30, 2020, 12:22 PM EDT (16:22 UTC)
Expired: Jul 31, 2020, 8:00 AM EDT
In force: 20 hr
Issued by: NWS Charleston, WV
Flood severity: None

All 40 counties

Boyd County, KY, Carter County, KY, Greenup County, KY, Lawrence County, KY, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Vinton 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, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wirt County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 35 km from the middle of the area, began a volume at 16:26 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, 4.4 hours before the alert went out and 223 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: 51 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 1257 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 65 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 Jul 30, 10:32 AM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jul 30, 10:32 AM EDT, 1 hour 50 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jul 30, 4:32 AM EDT, 7 hours 50 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 30, 12:25 PM EDT	Special Weather Statement	RLX	Wayne	50 min
Jul 30, 12:41 PM EDT	Special Weather Statement	RLX	Pleasants	49 min
Jul 30, 1:13 PM EDT	Special Weather Statement	RLX	Cabell	62 min
Jul 30, 1:42 PM EDT	Flash Flood Warning	RLX	Cabell	114 min
Jul 30, 2:00 PM EDT	Special Weather Statement	RLX	Mason	30 min
Jul 30, 2:19 PM EDT	Special Weather Statement	RLX	Calhoun, Gilmer	41 min
Jul 30, 2:45 PM EDT	Special Weather Statement	RLX	Calhoun	30 min
Jul 30, 2:58 PM EDT	Flash Flood Warning	RLX	Braxton, Calhoun, Gilmer, Roane	3 hr
Jul 30, 4:28 PM EDT	Flash Flood Warning	RLX	Calhoun, Ritchie, Roane, Wirt	3 hr
Jul 30, 4:46 PM EDT	Flash Flood Warning	RLX	Pleasants, Ritchie, Wirt, Wood	3 hr
Jul 30, 4:52 PM EDT	Special Weather Statement	RLX	Barbour, Lewis, Upshur	53 min
Jul 30, 5:52 PM EDT	Areal Flood Warning	RLX	Braxton, Gilmer	6 hr
Jul 30, 7:20 PM EDT	Areal Flood Warning	RLX	Calhoun, Gilmer	6 hr
Jul 30, 6:20 PM EDT	Flash Flood Warning	RLX	Washington	115 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.