Alert archive / North Carolina / Areal Flood Warnings in 2017

Areal Flood Warning 7, NWS Raleigh, NC

June 20, 20177 counties in North Carolina

NWS Raleigh, NC issued this areal flood warning at Jun 20, 2017, 3:03 AM EDT for 7 counties in North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 20, 2017, 3:03 AM EDT (07:03 UTC)
Expired: Jun 20, 2017, 6:00 AM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

Counties Alamance County, NC, Davidson County, NC, Durham County, NC, Granville County, NC, Guilford County, NC, Orange County, NC, Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 91 km from the middle of the area, began a volume at 07:07 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, 7.1 hours before the alert went out and 45 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: 1212 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 1136 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 7.4

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Jun 20, 2:40 AM EDT, 23 minutes earlier.

Area forecast discussion, Jun 20, 2:40 AM EDT, 23 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 19, 8:20 PM EDT, 6 hours 43 minutes before

Hazardous Weather Outlook
National Weather Service Raleigh NC
820 PM EDT Mon Jun 19 2017

NCZ007>011-021>028-038>043-073>078-083>086-088-089-210030-
Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance-
Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake-
Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson-
Richmond-Scotland-Hoke-Cumberland-Sampson-
820 PM EDT Mon Jun 19 2017

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Tonight.

Bands of repeated showers and thunderstorms may result in localized
flash flooding tonight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Local storm report, Jun 20, 12:34 AM EDT, 2 hours 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
1234 AM EDT TUE JUN 20 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1230 AM     FLASH FLOOD      2 SSE MEBANE            36.06N 79.25W
06/20/2017                   ORANGE             NC   911 CALL CENTER

            WATER OVER BEN WILSON RD NEAR BOWMAN RD IN
            MEBANE. CREWS HEADING OUT TO CLOSE ROAD.

&&

KDS

Special weather statement, Jun 20, 1:22 AM EDT, 1 hour 41 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>

Local storm report, Jun 20, 1:33 AM EDT, 1 hour 30 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>

Local storm report, Jun 20, 2:38 AM EDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
238 AM EDT TUE JUN 20 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1245 AM     FLASH FLOOD      HILLSBOROUGH            36.07N 79.11W
06/20/2017                   ORANGE             NC   911 CALL CENTER

            CAR STRANDED AND ROAD REMAINS CLOSED AT ENO
            ST. AND DIMMOCKS MILL RD.

&&

MWS

Local storm report, Jun 20, 2:41 AM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
241 AM EDT TUE JUN 20 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1257 AM     FLASH FLOOD      1 W HILLSBOROUGH        36.07N 79.12W
06/20/2017                   ORANGE             NC   911 CALL CENTER

            ROAD CLOSURE AT DIMMOCKS MILL RD. AND WEST
            HILL AVE.

&&

MWS

Local storm report, Jun 20, 2:45 AM EDT, 18 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 19, 8:41 PM EDT	Special Weather Statement	RAH	Alamance, Granville, Guilford, Orange, Person, Vance	64 min
Jun 19, 8:55 PM EDT	Areal Flood Advisory	RAH	Alamance, Durham, Forsyth, Granville, Guilford, Orange and 2 more	6 hr
Jun 19, 9:07 PM EDT	Flash Flood Warning	RAH	Granville, Person	3 hr
Jun 19, 9:19 PM EDT	Special Weather Statement	RAH	Warren	56 min
Jun 19, 9:30 PM EDT	Severe Thunderstorm Warning	RAH	Durham, Granville, Orange, Wake	60 min
Jun 19, 9:40 PM EDT	Special Weather Statement	RAH	Anson, Richmond	65 min
Jun 19, 9:58 PM EDT	Flash Flood Warning	RAH	Guilford	3 hr
Jun 19, 10:14 PM EDT	Special Weather Statement	RAH	Alamance	46 min
Jun 19, 10:18 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Montgomery, Richmond, Stanly	57 min
Jun 19, 10:47 PM EDT	Areal Flood Advisory	RAH	Anson	3 hr
Jun 19, 11:34 PM EDT	River Flood Warning	RAH	Alamance	29 hr
Jun 19, 11:39 PM EDT	Flash Flood Warning	RAH	Alamance, Durham, Granville, Orange	4 hr
Jun 19, 11:55 PM EDT	Flash Flood Warning	RAH	Davidson, Guilford, Randolph	3 hr
Jun 20, 12:16 AM EDT	Areal Flood Advisory	RAH	Chatham, Edgecombe, Franklin, Granville, Halifax, Nash and 3 more	3 hr
Jun 20, 1:00 AM EDT	Flash Flood Warning	RAH	Guilford	2 hr
Jun 20, 1:22 AM EDT	Special Weather Statement	RAH	Chatham	53 min
Jun 20, 6:14 AM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Hoke, Johnston, Sampson, Wayne	91 min
Jun 20, 8:00 AM EDT	Special Weather Statement	RAH	Cumberland, Hoke, Wayne	90 min
Jun 20, 8:09 AM EDT	Areal Flood Advisory	RAH	Cumberland	111 min
Jun 20, 8:32 AM EDT	River Flood Warning	RAH	Chatham	40 hr

Nearby

Areal Flood Warnings in North Carolina, 2017 Every areal flood warning 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.