Alert archive / Idaho / Mesoscale Discussions in 2013
Mesoscale Discussion 1839
The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2013, 2:31 PM MDT for 19 counties in Idaho; Beaverhead County, Montana; Box Elder County, Utah. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2013, 2:31 PM MDT (20:31 UTC)
- Expired
- Sep 5, 2013, 4:30 PM MDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
All 21 counties
Bannock County, ID, Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Caribou County, ID, Cassia County, ID, Clark County, ID, Custer County, ID, Franklin County, ID, Fremont County, ID, Jefferson County, ID, Lemhi County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Oneida County, ID, Power County, ID, Teton County, ID, Beaverhead County, MT, Box Elder County, UT
The radar
The Pocatello radar (KSFX), 33 km from the middle of the area, began a volume at 20:32 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.
The nearest sounding before it
Boise Airport, ID (KBOI), launched 12:00Z, 8.5 hours before the alert went out and 282 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.
- Mixed-layer CAPE
- 97 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1643 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 4, 9:49 PM MDT | Mesoscale Discussion | SPC | Adams, Clearwater, Idaho, Latah, Lewis, Nez Perce and 2 more | 116 min |
| Sep 5, 1:06 PM MDT | Mesoscale Discussion | SPC | Ada, Adams, Canyon, Elmore, Gem, Owyhee and 2 more | 54 min |
| Sep 5, 1:35 PM MDT | Severe Thunderstorm Watch | SPC | Ada, Adams, Boise, Camas, Canyon, Clearwater and 12 more | 7 hr |
| Sep 5, 3:56 PM MDT | Severe Thunderstorm Watch | SPC | Bannock, Bingham, Blaine, Butte, Cassia, Clark and 7 more | 7 hr |
| Sep 5, 5:01 PM MDT | Mesoscale Discussion | SPC | Ada, Adams, Boise, Canyon, Elmore, Gem and 7 more | 89 min |
Nearby
Mesoscale Discussions in Idaho, 2013Mesoscale Discussions in Montana, 2013Mesoscale Discussions in Utah, 2013Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.