Alert archive / Montana / Mesoscale Discussions in 2013

Mesoscale Discussion 1847

September 6, 201317 counties in Montana

The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2013, 1:44 PM MDT for 17 counties in Montana. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Sep 6, 2013, 1:44 PM MDT (19:44 UTC)
Expired: Sep 6, 2013, 2:45 PM MDT
In force: 61 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Gallatin County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Park County, MT, Pondera County, MT, Powell County, MT, Silver Bow County, MT, Teton County, MT, Toole County, MT, Wheatland County, MT

The radar

The Great Falls radar (KTFX), 47 km from the middle of the area, began a volume at 19:47 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.

Severe Thunderstorm Watch 514Sep 6, 2:10 PM MDT

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
Sep 5, 6:28 PM MDT	Mesoscale Discussion	SPC	Lincoln, Mineral, Sanders	2 hr
Sep 5, 6:34 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Madison	116 min
Sep 5, 7:05 PM MDT	Severe Thunderstorm Watch	SPC	Broadwater, Deer Lodge, Gallatin, Granite, Jefferson, Lake and 9 more	7 hr
Sep 5, 8:13 PM MDT	Mesoscale Discussion	SPC	Broadwater, Deer Lodge, Granite, Jefferson, Lake, Lewis and Clark and 6 more	2 hr
Sep 5, 10:44 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Deer Lodge, Granite, Jefferson, Lake and 7 more	2 hr
Sep 6, 2:09 PM MDT	Severe Thunderstorm Watch	SPC	Blaine, Broadwater, Cascade, Chouteau, Deer Lodge, Fergus and 18 more	8 hr
Sep 6, 5:04 PM MDT	Mesoscale Discussion	SPC	Blaine, Cascade, Chouteau, Fergus, Golden Valley, Hill and 9 more	86 min

Nearby

Mesoscale Discussions in Montana, 2013 Every mesoscale discussion in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.