Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 110, NWS Blacksburg, VA

July 21, 2020Rockingham County, North Carolina

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 21, 2020, 8:28 PM EDT for Rockingham County, North Carolina. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 21, 2020, 8:28 PM EDT (00:28 UTC)
Expired: Jul 21, 2020, 9:15 PM EDT
In force: 47 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Rockingham County, NC

The radar

The Roanoke radar (KFCX), 83 km from the middle of the area, began a volume at 00:29 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

Roanoke, VA (KRNK), launched 00:00Z, 0.5 hours before the alert went out and 93 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: 895 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1464 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 55 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 7:47 PM EDT, 41 minutes earlier.

Area forecast discussion, Jul 21, 7:47 PM EDT, 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>

Hazardous weather outlook, Jul 21, 8:12 PM EDT, 16 minutes before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
812 PM EDT Tue Jul 21 2020

NCZ003>006-019-020-VAZ022>024-032>035-043>047-058-059-221215-
Surry-Stokes-Rockingham-Caswell-Wilkes-Yadkin-Roanoke-Botetourt-
Rockbridge-Patrick-Franklin-Bedford-Amherst-Henry-Pittsylvania-
Campbell-Appomattox-Buckingham-Halifax-Charlotte-
812 PM EDT Tue Jul 21 2020

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina, central Virginia, south central Virginia,
southwest Virginia and west central Virginia.

.DAY ONE...Tonight.

There is a low probability for hazardous weather.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Strong to severe thunderstorms are possible during the afternoon and
evening on Wednesday and Thursday. Damaging winds are the primary
severe weather threat, but large hail and localized flooding are also
possible.

Heat indices between 100 and 105 are possible Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ001-002-018-VAZ007-009>020-WVZ042>044-507-508-221215-
Ashe-Alleghany NC-Watauga-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-
Montgomery-Grayson-Carroll-Floyd-Craig-Alleghany VA-Bath-Mercer-
Summers-Monroe-Eastern Greenbrier-Western Greenbrier-
812 PM EDT Tue Jul 21 2020

This Hazardous Weather Outlook is for northwest North Carolina,
southwest Virginia, west central Virginia and southeast West
Virginia.

.DAY ONE...Tonight.

There is a low probability for hazardous weather.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Strong to severe thunderstorms are possible during the afternoon and
evening on Wednesday and Thursday. Damaging winds are the primary
severe weather threat, but large hail and localized flooding are also
possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jul 21, 6:34 PM EDT, 1 hour 54 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>

Special weather statement, Jul 21, 7:22 PM EDT, 1 hour 6 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>

Special weather statement, Jul 21, 8:14 PM EDT, 14 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>

Special weather statement, Jul 21, 8:17 PM EDT, 11 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>

Special weather statement, Jul 21, 8:21 PM EDT, 7 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
821 PM EDT Tue Jul 21 2020

NCZ005-220045-
Rockingham-
821 PM EDT Tue Jul 21 2020

...A STRONG THUNDERSTORM WILL AFFECT ROCKINGHAM COUNTY...

At 820 PM EDT, a strong thunderstorm was located over Madison, moving
east at 15 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Eden...
Reidsville...
Wentworth...
Mayodan...
Madison...
Stoneville...
and Mayfield.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3632 8003 3646 8003 3654 7980 3654 7951
      3639 7953 3627 8001
TIME...MOT...LOC 0020Z 249DEG 12KT 3638 7997

PM

Special weather statement, Jul 21, 8:24 PM EDT, 4 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
824 PM EDT Tue Jul 21 2020

VAZ020-024-220100-
Bath-Rockbridge-
824 PM EDT Tue Jul 21 2020

...A STRONG THUNDERSTORM WILL AFFECT
NORTHWESTERN ROCKBRIDGE AND CENTRAL BATH COUNTIES...

At 823 PM EDT, a strong thunderstorm was located over Bacova
Junction, or over Hot Springs, moving east at 15 mph.

Winds in excess of 30 mph and half inch hail are possible with this
storm.

Locations impacted include...
Goshen...
Millboro...
Warm Springs...
Hot Springs...
Nimrod Hall...
Lake Moomaw...
and Ingalls Field.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3818 7951 3817 7952 3815 7953 3817 7949
      3817 7944 3816 7943 3809 7949 3798 7930
      3789 7965 3795 7991 3802 7995 3820 7955
TIME...MOT...LOC 0023Z 249DEG 12KT 3803 7985

PM

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 8:14 PM EDT	Special Weather Statement	RNK	Giles	31 min
Jul 21, 8:24 PM EDT	Special Weather Statement	RNK	Bath	36 min
Jul 21, 8:44 PM EDT	Special Weather Statement	RNK	Giles, Montgomery, Pulaski, City of Radford	31 min
Jul 21, 9:08 PM EDT	Special Weather Statement	RNK	City of Danville	22 min
Jul 21, 9:27 PM EDT	Severe Thunderstorm Warning	RNK	Henry, Pittsylvania, City of Danville, City of Martinsville	51 min
Jul 21, 10:01 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	44 min
Jul 21, 10:23 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	52 min
Jul 21, 10:46 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Franklin, Roanoke, City of Roanoke	59 min
Jul 21, 11:27 PM EDT	Special Weather Statement	RNK	Buckingham	48 min
Jul 22, 12:32 AM EDT	Special Weather Statement	RNK	Cumberland	43 min
Jul 22, 8:32 AM EDT	Heat Advisory	RNK	Appomattox, Buckingham, Campbell, Charlotte, Halifax, Pittsylvania and 2 more	10 hr
Jul 22, 1:23 PM EDT	Special Weather Statement	RNK	Bath	37 min
Jul 22, 1:53 PM EDT	Special Weather Statement	RNK	Bath	22 min
Jul 22, 2:11 PM EDT	Special Weather Statement	RNK	Bedford	34 min
Jul 22, 2:20 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt	40 min
Jul 22, 2:29 PM EDT	Special Weather Statement	RNK	Bath	31 min
Jul 22, 2:33 PM EDT	Special Weather Statement	RNK	Carroll	27 min
Jul 22, 2:47 PM EDT	Special Weather Statement	RNK	Botetourt	28 min
Jul 22, 2:52 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Lexington	23 min
Jul 22, 2:58 PM EDT	Special Weather Statement	RNK	City of Buena Vista, City of Lexington	32 min
Jul 22, 3:02 PM EDT	Severe Thunderstorm Warning	RNK	Amherst, Rockbridge, City of Buena Vista, City of Lexington	58 min
Jul 22, 3:06 PM EDT	Special Weather Statement	RNK	Patrick	39 min
Jul 22, 3:16 PM EDT	Special Weather Statement	RNK	City of Lexington	29 min
Jul 22, 3:43 PM EDT	Special Weather Statement	RNK	Henry, City of Martinsville	47 min
Jul 22, 3:49 PM EDT	Special Weather Statement	RNK	Rockbridge, City of Buena Vista, City of Lexington	26 min
Jul 22, 4:11 PM EDT	Special Weather Statement	RNK	Appomattox, Campbell, Pittsylvania	49 min
Jul 22, 4:13 PM EDT	Special Weather Statement	RNK	Rockbridge	32 min
Jul 22, 4:29 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham, Campbell, Charlotte	61 min
Jul 22, 4:37 PM EDT	Special Weather Statement	RNK	Buckingham	38 min
Jul 22, 4:44 PM EDT	Severe Thunderstorm Warning	RNK	Appomattox, Buckingham	61 min
Jul 22, 4:59 PM EDT	Severe Thunderstorm Warning	RNK	Carroll, Grayson, City of Galax	48 min
Jul 22, 5:32 PM EDT	Special Weather Statement	RNK	Wythe	28 min
Jul 22, 5:39 PM EDT	Special Weather Statement	RNK	Giles, Pulaski, City of Radford	36 min
Jul 22, 5:40 PM EDT	Areal Flood Advisory	RNK	Carroll, Grayson, City of Galax	4 hr
Jul 22, 5:56 PM EDT	Special Weather Statement	RNK	Botetourt	34 min
Jul 22, 5:59 PM EDT	Special Weather Statement	RNK	Wythe	31 min
Jul 22, 6:22 PM EDT	Special Weather Statement	RNK	Craig	38 min
Jul 22, 6:26 PM EDT	Special Weather Statement	RNK	Grayson	34 min
Jul 22, 6:52 PM EDT	Flash Flood Warning	RNK	Grayson, Smyth, Wythe	3 hr
Jul 22, 6:55 PM EDT	Special Weather Statement	RNK	Bland, Smyth, Tazewell, Wythe	50 min
Jul 22, 7:21 PM EDT	Special Weather Statement	RNK	City of Roanoke, City of Salem	24 min
Jul 22, 7:43 PM EDT	Special Weather Statement	RNK	Bland, Tazewell, Wythe	47 min
Jul 22, 7:45 PM EDT	Special Weather Statement	RNK	Botetourt, City of Roanoke, City of Salem	45 min
Jul 21, 8:17 PM EDT	Special Weather Statement	RNK	Stokes	28 min
Jul 21, 8:21 PM EDT	Special Weather Statement	RNK	Rockingham	24 min
Jul 21, 8:57 PM EDT	Special Weather Statement	RNK	Stokes	33 min
Jul 22, 5:05 PM EDT	Special Weather Statement	RNK	Watauga	25 min
Jul 22, 5:47 PM EDT	Areal Flood Advisory	RNK	Watauga	111 min
Jul 22, 6:24 PM EDT	Special Weather Statement	RNK	Monroe	36 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning 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.