Alert archive / Montana / Mesoscale Discussions in 2019

Mesoscale Discussion 1699

August 11, 20194 states

The Storm Prediction Center issued this mesoscale discussion at Aug 11, 2019, 12:15 PM MDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Aug 11, 2019, 12:15 PM MDT (18:15 UTC)
Expired: Aug 11, 2019, 1:45 PM MDT
In force: 90 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

Counties Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Prairie County, MT, Rosebud County, MT, Treasure County, MT, Yellowstone County, MT, Bowman County, ND, Butte County, SD, Harding County, SD, Lawrence County, SD, Campbell County, WY, Crook County, WY, Sheridan County, WY, Weston County, WY

The radar

The Billings radar (KBLX), 242 km from the middle of the area, began a volume at 18:17 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 571Aug 11, 2:00 PM MDT

The text

As transmitted.

<!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
Aug 10, 8:34 PM MDT	Mesoscale Discussion	SPC	Big Horn, Broadwater, Carter, Custer, Golden Valley, Jefferson and 7 more	86 min
Aug 11, 11:33 AM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Cascade, Deer Lodge, Fergus, Gallatin and 13 more	87 min
Aug 11, 12:34 PM MDT	Severe Thunderstorm Watch	SPC	Beaverhead, Broadwater, Fergus, Gallatin, Jefferson, Judith Basin and 5 more	6 hr
Aug 11, 1:59 PM MDT	Tornado Watch	SPC	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 6 more	10 hr
Aug 11, 2:43 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Broadwater, Deer Lodge, Fergus, Gallatin, Jefferson and 7 more	92 min
Aug 11, 3:55 PM MDT	Mesoscale Discussion	SPC	Dawson, Garfield, McCone, Petroleum, Phillips, Prairie and 4 more	65 min
Aug 11, 5:07 PM MDT	Severe Thunderstorm Watch	SPC	Dawson, Garfield, McCone, Petroleum, Phillips, Prairie and 4 more	7 hr
Aug 11, 5:54 PM MDT	Mesoscale Discussion	SPC	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more	66 min
Aug 11, 4:19 PM MDT	Mesoscale Discussion	SPC	Adams, Bowman, Emmons, Grant, Hettinger, Morton and 3 more	116 min
Aug 11, 4:51 PM MDT	Mesoscale Discussion	SPC	Fall River	114 min
Aug 11, 12:54 PM MDT	Mesoscale Discussion	SPC	Goshen, Laramie, Platte	2 hr
Aug 11, 1:24 PM MDT	Severe Thunderstorm Watch	SPC	Converse, Goshen, Laramie, Niobrara, Platte	7 hr

Nearby

Mesoscale Discussions in Montana, 2019 Mesoscale Discussions in Wyoming, 2019 Mesoscale Discussions in South Dakota, 2019 Every mesoscale discussion 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; radar from the NEXRAD Level II archive.