Alert archive / Maryland / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 149, NWS Wakefield, VA

July 4, 2019Dorchester County, Maryland

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 4, 2019, 3:20 PM EDT for Dorchester County, Maryland. It was in force for 40 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 4, 2019, 3:20 PM EDT (19:20 UTC)
Expired: Jul 4, 2019, 4:00 PM EDT
In force: 40 min
Issued by: NWS Wakefield, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Dorchester County, MD

The radar

The Dover AFB radar (KDOX), 72 km from the middle of the area, began a volume at 19:24 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.3 hours before the alert went out and 81 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: 1129 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 1075 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -1 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 Wakefield, VA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 2:52 PM EDT, 28 minutes earlier.

Area forecast discussion, Jul 4, 2:52 PM EDT, 28 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 4, 3:09 AM EDT, 12 hours 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>

In the hours before

Special weather statement, Jul 4, 1:55 PM 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>

Special weather statement, Jul 4, 1:56 PM EDT, 1 hour 24 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 4, 2:10 PM EDT, 1 hour 10 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 4, 2:45 PM EDT, 35 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 4, 2:51 PM EDT, 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>

Special weather statement, Jul 4, 3:11 PM EDT, 9 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 Wakefield, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 8:08 PM EDT	Special Weather Statement	AKQ	Henrico	37 min
Jul 3, 8:18 PM EDT	Special Weather Statement	AKQ	Henrico	27 min
Jul 3, 8:46 PM EDT	Special Weather Statement	AKQ	Henrico	44 min
Jul 3, 9:56 PM EDT	Special Weather Statement	AKQ	Cumberland, Fluvanna	64 min
Jul 4, 1:17 PM EDT	Special Weather Statement	AKQ	Middlesex	43 min
Jul 4, 1:28 PM EDT	Special Weather Statement	AKQ	Northumberland	32 min
Jul 4, 1:47 PM EDT	Special Weather Statement	AKQ	King and Queen	28 min
Jul 4, 1:55 PM EDT	Special Weather Statement	AKQ	Westmoreland	35 min
Jul 4, 2:10 PM EDT	Special Weather Statement	AKQ	Prince Edward	35 min
Jul 4, 2:45 PM EDT	Special Weather Statement	AKQ	Prince Edward	45 min
Jul 4, 3:11 PM EDT	Special Weather Statement	AKQ	Caroline	49 min
Jul 4, 3:36 PM EDT	Special Weather Statement	AKQ	City of Norfolk, City of Portsmouth	39 min
Jul 4, 4:00 PM EDT	Special Weather Statement	AKQ	Caroline	45 min
Jul 4, 4:04 PM EDT	Special Weather Statement	AKQ	Goochland, Powhatan	41 min
Jul 4, 4:17 PM EDT	Special Weather Statement	AKQ	Mecklenburg	28 min
Jul 4, 4:20 PM EDT	Severe Thunderstorm Warning	AKQ	Mecklenburg	40 min
Jul 4, 4:36 PM EDT	Special Weather Statement	AKQ	Mecklenburg	24 min
Jul 4, 4:43 PM EDT	Special Weather Statement	AKQ	Fluvanna, Goochland, Louisa, Powhatan	62 min
Jul 4, 4:48 PM EDT	Special Weather Statement	AKQ	Chesterfield, City of Richmond	42 min
Jul 4, 4:53 PM EDT	Special Weather Statement	AKQ	Hanover, Henrico, King William, New Kent	52 min
Jul 4, 4:59 PM EDT	Special Weather Statement	AKQ	Surry	31 min
Jul 4, 5:02 PM EDT	Special Weather Statement	AKQ	Mecklenburg	28 min
Jul 4, 5:07 PM EDT	Areal Flood Advisory	AKQ	Chesterfield, City of Richmond	3 hr
Jul 4, 5:14 PM EDT	Special Weather Statement	AKQ	Prince George, Surry	31 min
Jul 4, 5:47 PM EDT	Special Weather Statement	AKQ	Charles City, Chesterfield, Hanover, Henrico, City of Richmond	58 min
Jul 4, 5:57 PM EDT	Areal Flood Advisory	AKQ	Chesterfield, Hanover, Henrico, New Kent, City of Richmond	3 hr
Jul 4, 6:50 PM EDT	Special Weather Statement	AKQ	Brunswick, Dinwiddie, Greensville, City of Emporia	55 min
Jul 4, 7:29 PM EDT	Special Weather Statement	AKQ	Southampton, Sussex, City of Franklin	61 min
Jul 4, 7:56 PM EDT	Special Weather Statement	AKQ	Isle of Wight, Surry, City of Franklin, City of Suffolk	64 min
Jul 4, 5:23 PM EDT	Special Weather Statement	AKQ	Bertie	37 min
Jul 4, 12:48 PM EDT	Special Weather Statement	AKQ	Somerset	42 min
Jul 4, 1:56 PM EDT	Special Weather Statement	AKQ	Wicomico	49 min
Jul 4, 2:51 PM EDT	Special Weather Statement	AKQ	Dorchester	39 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2019 Every severe thunderstorm warning in 2019

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.