Alert archive / Maine / Mesoscale Discussions in 2011

Mesoscale Discussion 1053

June 1, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2011, 4:17 PM EDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2011, 4:17 PM EDT (20:17 UTC)
Expired: Jun 1, 2011, 5:45 PM EDT
In force: 88 min
Issued by: the Storm Prediction Center

All 26 counties

Berkshire County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA, Androscoggin County, ME, Cumberland County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Piscataquis County, ME, Sagadahoc County, ME, Somerset County, ME, York County, ME, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Dutchess County, NY, Putnam County, NY, Rockland County, NY, Westchester County, NY

The radar

The Portland,ME radar (KGYX), 95 km from the middle of the area, began a volume at 20:20 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 416Jun 1, 7:40 PM EDT

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 8.3 hours before the alert went out and 94 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: 1092 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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>

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 10:02 AM EDT	Severe Thunderstorm Watch	SPC	Northwest Hills Planning Region	7 hr
Jun 1, 12:26 PM EDT	Mesoscale Discussion	SPC		64 min
Jun 1, 12:58 PM EDT	Tornado Watch	SPC	Greater Bridgeport Planning Region, Capitol Planning Region, Naugatuck Valley Planning Region, Northeastern Connecticut Planning Region	7 hr
Jun 1, 7:09 PM EDT	Mesoscale Discussion	SPC		96 min
Jun 1, 7:40 PM EDT	Tornado Watch	SPC	Capitol Planning Region, Northeastern Connecticut Planning Region	2 hr
Jun 1, 2:19 PM EDT	Mesoscale Discussion	SPC	Aroostook, Franklin, Kennebec, Penobscot, Piscataquis, Somerset and 1 more	86 min
Jun 1, 2:37 PM EDT	Tornado Watch	SPC	Aroostook, Franklin, Kennebec, Knox, Lincoln, Penobscot and 3 more	5 hr
Jun 1, 5:47 PM EDT	Mesoscale Discussion	SPC	Bristol, Dukes, Plymouth	58 min
Jun 1, 5:58 AM EDT	Mesoscale Discussion	SPC	Albany, Broome, Chenango, Columbia, Delaware, Essex and 12 more	2 hr
Jun 1, 9:38 AM EDT	Mesoscale Discussion	SPC	Allegany, Broome, Cayuga, Chemung, Chenango, Clinton and 21 more	37 min

Nearby

Mesoscale Discussions in Maine, 2011 Mesoscale Discussions in Connecticut, 2011 Mesoscale Discussions in New Hampshire, 2011 Every mesoscale discussion in 2011

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.