Alert archive / New Hampshire / Special Weather Statements in 2021

Special Weather Statement, NWS Gray, ME

April 21, 2021Hillsborough County, New Hampshire

NWS Gray, ME issued this special weather statement at Apr 21, 2021, 4:44 PM EDT for Hillsborough County, New Hampshire. It was in force for 61 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 21, 2021, 4:44 PM EDT (20:44 UTC)
Expired: Apr 21, 2021, 5:45 PM EDT
In force: 61 min
Issued by: NWS Gray, ME

County Hillsborough County, NH

The radar

The Boston radar (KBOX), 116 km from the middle of the area, began a volume at 20:44 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

Gray, ME (KGYX), launched 12:00Z, 8.7 hours before the alert went out and 151 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: 1061 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 302 m²/s²
0-3 km storm-relative helicity: 442 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Gray, ME wrote its last area forecast discussion before this special weather statement went out at Apr 20, 7:18 PM EDT, 21 hours 26 minutes earlier.

Area forecast discussion, Apr 20, 7:18 PM EDT, 21 hours 26 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 Gray, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 21, 2:56 AM EDT	Winter Weather Advisory	GYX	Franklin, Oxford, Somerset	35 hr
Apr 21, 4:03 AM EDT	Gale Warning	GYX		60 hr
Apr 21, 6:11 PM EDT	Special Weather Statement	GYX	York	49 min
Apr 21, 6:53 PM EDT	Special Weather Statement	GYX	Cumberland	52 min
Apr 21, 3:58 PM EDT	Special Weather Statement	GYX	Cheshire	62 min
Apr 21, 5:11 PM EDT	Special Weather Statement	GYX	Merrimack	64 min
Apr 21, 5:39 PM EDT	Special Weather Statement	GYX	Rockingham	66 min

Nearby

Special Weather Statements in New Hampshire, 2021 Every special weather statement in 2021

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.