Alert archive / Kentucky / Flash Flood Watches in 2010

Flash Flood Watch 2, NWS Wilmington, OH

May 12, 201011 counties in Ohio; 12 counties in Kentucky; 5 counties in Indiana

NWS Wilmington, OH issued this flash flood watch at May 12, 2010, 7:57 AM EDT for 11 counties in Ohio; 12 counties in Kentucky; 5 counties in Indiana. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: May 12, 2010, 7:57 AM EDT (11:57 UTC)
Expired: May 12, 2010, 2:08 PM EDT
In force: 6 hr
Issued by: NWS Wilmington, OH
Flood severity: None

All 28 counties

Dearborn County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Clermont County, OH, Clinton County, OH, Hamilton County, OH, Highland County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 65 km from the middle of the area, began a volume at 12:00 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 00:00Z, 12.0 hours before the alert went out and 67 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: 638 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 251 m²/s²
0-3 km storm-relative helicity: 331 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.2

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 Wilmington, OH wrote its last area forecast discussion before this flash flood watch went out at May 12, 6:32 AM EDT, 1 hour 25 minutes earlier.

Area forecast discussion, May 12, 6:32 AM EDT, 1 hour 25 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, May 12, 5:28 AM EDT, 2 hours 29 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 Wilmington, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 12, 9:04 AM EDT	Areal Flood Advisory	ILN	Brown, Clermont, Hamilton	4 hr
May 12, 10:09 AM EDT	Flash Flood Warning	ILN	Adams, Brown	4 hr
May 12, 10:50 AM EDT	Flash Flood Warning	ILN	Scioto	3 hr
May 12, 9:43 AM EDT	Flash Flood Warning	ILN	Bracken, Carroll, Gallatin, Grant, Owen, Pendleton	3 hr

Nearby

Flash Flood Watches in Kentucky, 2010 Flash Flood Watches in Ohio, 2010 Flash Flood Watches in Indiana, 2010 Every flash flood watch in 2010

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.