Alert archive / North Carolina / Flash Flood Watches in 2020

Flash Flood Watch 3, NWS Raleigh, NC

June 11, 202026 counties in North Carolina

NWS Raleigh, NC issued this flash flood watch at Jun 11, 2020, 3:59 AM EDT for 26 counties in North Carolina. It took effect at Jun 11, 2020, 12:00 PM EDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jun 11, 2020, 3:59 AM EDT (07:59 UTC)
In effect from: Jun 11, 2020, 12:00 PM EDT
Expired: Jun 12, 2020, 3:38 AM EDT
In force: 16 hr
Issued by: NWS Raleigh, NC
Flood severity: None

All 26 counties

Alamance County, NC, Anson County, NC, Chatham County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Scotland County, NC, Stanly County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 40 km from the middle of the area, began a volume at 08:01 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

Newport, NC (KMHX), launched 00:00Z, 8.0 hours before the alert went out and 212 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 929 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: -17 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 Raleigh, NC wrote its last area forecast discussion before this flash flood watch went out at Jun 11, 3:47 AM EDT, 12 minutes earlier.

Area forecast discussion, Jun 11, 3:47 AM EDT, 12 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, Jun 10, 5:09 AM EDT, 22 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 Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 8:03 PM EDT	Special Weather Statement	RAH	Durham, Franklin, Granville, Wake	57 min
Jun 11, 1:14 PM EDT	Special Weather Statement	RAH	Halifax, Johnston, Nash, Sampson, Wayne, Wilson	91 min
Jun 11, 1:38 PM EDT	Areal Flood Advisory	RAH	Franklin, Johnston, Nash, Wake, Wilson	3 hr
Jun 11, 1:55 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Nash	3 hr
Jun 11, 2:40 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Franklin, Nash, Wake	2 hr
Jun 11, 3:29 PM EDT	Areal Flood Advisory	RAH	Halifax	3 hr
Jun 11, 3:43 PM EDT	Special Weather Statement	RAH	Alamance, Person	62 min
Jun 11, 4:37 PM EDT	Areal Flood Advisory	RAH	Alamance, Granville, Orange, Person, Vance	3 hr
Jun 11, 4:48 PM EDT	Special Weather Statement	RAH	Durham, Granville, Orange, Vance	57 min
Jun 11, 5:27 PM EDT	Special Weather Statement	RAH	Guilford	63 min
Jun 11, 5:30 PM EDT	Special Weather Statement	RAH	Davidson	60 min
Jun 11, 5:39 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Alamance, Guilford	3 hr
Jun 11, 5:42 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Guilford	48 min
Jun 11, 5:55 PM EDT	Special Weather Statement	RAH	Durham, Granville, Vance, Warren	65 min
Jun 11, 6:08 PM EDT	Special Weather Statement	RAH	Alamance, Orange	67 min
Jun 11, 6:14 PM EDT	Areal Flood Advisory	RAH	Durham, Granville, Wake	3 hr
Jun 11, 6:31 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Alamance, Durham, Granville, Orange	3 hr
Jun 11, 6:45 PM EDT	Special Weather Statement	RAH	Randolph	60 min
Jun 11, 7:07 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Chatham, Orange	38 min
Jun 11, 7:29 PM EDT	Severe Thunderstorm Warning	RAH	Chatham, Durham, Wake	46 min
Jun 11, 7:44 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Chatham, Montgomery, Moore, Orange, Randolph	61 min
Jun 11, 7:48 PM EDT	Areal Flood Advisory	RAH	Chatham, Randolph	3 hr

Nearby

Flash Flood Watches in North Carolina, 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.