Alert archive / Nebraska / Special Weather Statements in 2011
Special Weather Statement, NWS Cheyenne, WY
NWS Cheyenne, WY issued this special weather statement at Aug 21, 2011, 3:51 PM MDT for Scotts Bluff County, Nebraska. It was in force for 39 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
- Aug 21, 2011, 3:51 PM MDT (21:51 UTC)
- Expired
- Aug 21, 2011, 4:30 PM MDT
- In force
- 39 min
- Issued by
- NWS Cheyenne, WY
County Scotts Bluff County, NE
The radar
The Cheyenne radar (KCYS), 137 km from the middle of the area, began a volume at 21:53 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
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.9 hours before the alert went out and 295 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
- 669 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 561 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 161 m²/s²
- 0-3 km storm-relative helicity
- 204 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Cheyenne, WY wrote its last area forecast discussion before this special weather statement went out at Aug 20, 5:57 PM MDT, 21 hours 54 minutes earlier.
Area forecast discussion, Aug 20, 5:57 PM MDT, 21 hours 54 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>
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 6:03 PM MDT | Special Weather Statement | CYS | Laramie | 42 min |
| Aug 20, 6:51 PM MDT | Special Weather Statement | CYS | Laramie | 39 min |
| Aug 20, 7:08 PM MDT | Special Weather Statement | CYS | Platte | 52 min |
| Aug 21, 3:06 PM MDT | Special Weather Statement | CYS | Laramie | 39 min |
| Aug 20, 7:38 PM MDT | Special Weather Statement | CYS | Kimball | 52 min |
| Aug 20, 7:54 PM MDT | Special Weather Statement | CYS | Kimball | 51 min |
| Aug 21, 2:14 PM MDT | Special Weather Statement | CYS | Kimball | 61 min |
| Aug 21, 4:36 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 39 min |
| Aug 21, 5:32 PM MDT | Special Weather Statement | CYS | Morrill | 43 min |
| Aug 21, 5:59 PM MDT | Special Weather Statement | CYS | Scotts Bluff | 46 min |
Nearby
Special Weather Statements in Nebraska, 2011Every special weather statement 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.