Alert archive / North Carolina / Flash Flood Watches in 2013

Flash Flood Watch 7, NWS Greenville-Spartanburg, SC

July 11, 201323 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia

NWS Greenville-Spartanburg, SC issued this flash flood watch at Jul 11, 2013, 4:16 AM EDT for 23 counties in North Carolina; 8 counties in South Carolina; 6 counties in Georgia. It took effect at Jul 11, 2013, 10:00 AM EDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Jul 11, 2013, 4:16 AM EDT (08:16 UTC)
In effect from: Jul 11, 2013, 10:00 AM EDT
Expired: Jul 12, 2013, 4:00 AM EDT
In force: 18 hr
Issued by: NWS Greenville-Spartanburg, SC
Flood severity: None

All 37 counties

Elbert County, GA, Franklin County, GA, Habersham County, GA, Hart County, GA, Rabun County, GA, Stephens County, GA, Alexander County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Transylvania County, NC, Union County, NC, Yancey County, NC, Abbeville County, SC, Anderson County, SC, Cherokee County, SC, Chester County, SC, Greenwood County, SC, Laurens County, SC, Union County, SC, York County, SC

The radar

The Greer radar (KGSP), 43 km from the middle of the area, began a volume at 08:15 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.3 hours before the alert went out and 208 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: 1181 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1044 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 20 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 Greenville-Spartanburg, SC wrote its last area forecast discussion before this flash flood watch went out at Jul 11, 3:27 AM EDT, 49 minutes earlier.

Area forecast discussion, Jul 11, 3:27 AM EDT, 49 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 10, 10:36 PM EDT, 5 hours 40 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>

In the hours before

Local storm report, Jul 10, 10:34 PM EDT, 5 hours 42 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 Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 8:06 PM EDT	Flash Flood Warning	GSP	Buncombe	3 hr
Jul 10, 8:19 PM EDT	Special Weather Statement	GSP	Cleveland	56 min
Jul 10, 8:45 PM EDT	Areal Flood Advisory	GSP	Cleveland, Polk, Rutherford	105 min
Jul 10, 9:01 PM EDT	Areal Flood Advisory	GSP	Catawba, Iredell, Lincoln	3 hr
Jul 10, 9:09 PM EDT	Special Weather Statement	GSP	Cleveland	51 min
Jul 10, 9:37 PM EDT	Special Weather Statement	GSP	Rowan	68 min
Jul 10, 10:59 PM EDT	Areal Flood Warning	GSP	Buncombe	3 hr
Jul 10, 11:06 PM EDT	River Flood Advisory	GSP	Henderson, Transylvania	12 hr
Jul 11, 9:12 AM EDT	Special Weather Statement	GSP	Mecklenburg	63 min
Jul 11, 9:50 AM EDT	Areal Flood Advisory	GSP	Mecklenburg	2 hr
Jul 11, 10:02 AM EDT	Flash Flood Warning	GSP	Mecklenburg	3 hr
Jul 11, 12:53 PM EDT	Areal Flood Warning	GSP	Mecklenburg	3 hr
Jul 11, 2:17 PM EDT	Special Weather Statement	GSP	Union	43 min
Jul 11, 2:49 PM EDT	Special Weather Statement	GSP	Iredell	41 min
Jul 11, 3:17 PM EDT	Areal Flood Advisory	GSP	Iredell	2 hr
Jul 11, 5:33 PM EDT	Special Weather Statement	GSP	Union	57 min
Jul 11, 7:14 PM EDT	Special Weather Statement	GSP	Alexander, Davie, Iredell	61 min
Jul 11, 7:42 PM EDT	Flash Flood Warning	GSP	Alexander, Davie, Iredell	3 hr
Jul 10, 9:11 PM EDT	Special Weather Statement	GSP	Cherokee	49 min
Jul 10, 10:51 PM EDT	Areal Flood Advisory	GSP	Cherokee, York	2 hr
Jul 11, 2:38 PM EDT	Special Weather Statement	GSP	Cherokee	52 min
Jul 11, 2:50 PM EDT	Special Weather Statement	GSP	Cherokee	40 min
Jul 11, 3:01 PM EDT	Areal Flood Advisory	GSP	Cherokee	119 min
Jul 11, 3:09 PM EDT	Special Weather Statement	GSP	Greenwood	66 min
Jul 11, 3:35 PM EDT	Special Weather Statement	GSP	Spartanburg	55 min
Jul 11, 4:00 PM EDT	Special Weather Statement	GSP	Cherokee	45 min
Jul 11, 4:56 PM EDT	Special Weather Statement	GSP	York	49 min
Jul 11, 5:03 PM EDT	Special Weather Statement	GSP	Chester	27 min
Jul 11, 5:29 PM EDT	Special Weather Statement	GSP	Chester	46 min
Jul 11, 5:39 PM EDT	Areal Flood Advisory	GSP	Chester	111 min
Jul 11, 5:51 PM EDT	Special Weather Statement	GSP	Union	39 min
Jul 11, 5:57 PM EDT	Flash Flood Warning	GSP	Chester	3 hr
Jul 11, 6:21 PM EDT	Areal Flood Advisory	GSP	Union	2 hr
Jul 11, 6:34 PM EDT	Flash Flood Warning	GSP	Union	3 hr
Jul 11, 7:37 PM EDT	Flash Flood Warning	GSP	Union	3 hr

Nearby

Flash Flood Watches in North Carolina, 2013 Flash Flood Watches in South Carolina, 2013 Flash Flood Watches in Georgia, 2013 Every flash flood watch in 2013

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.