Alert archive / Wyoming / Special Weather Statements in 2015

Special Weather Statement, NWS Riverton, WY

August 3, 2015Natrona County, Wyoming

NWS Riverton, WY issued this special weather statement at Aug 3, 2015, 3:49 PM MDT for Natrona County, Wyoming. It was in force for 41 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 3, 2015, 3:49 PM MDT (21:49 UTC)
Expired: Aug 3, 2015, 4:30 PM MDT
In force: 41 min
Issued by: NWS Riverton, WY

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 148 km from the middle of the area, began a volume at 21:48 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

Denver, CO (KDEN), launched 12:00Z, 9.8 hours before the alert went out and 468 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: 83 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 2237 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -50 m²/s²
0-3 km storm-relative helicity: 6 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>

The office that day

Everything else NWS Riverton, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 12:52 AM MDT	Flash Flood Watch	RIW	Fremont, Lincoln, Sublette	25 hr
Aug 3, 2:58 PM MDT	Special Weather Statement	RIW	Natrona	47 min
Aug 3, 3:16 PM MDT	Special Weather Statement	RIW	Washakie	44 min
Aug 3, 3:53 PM MDT	Special Weather Statement	RIW		22 min
Aug 3, 4:03 PM MDT	Special Weather Statement	RIW	Washakie	42 min
Aug 3, 4:21 PM MDT	Special Weather Statement	RIW		39 min
Aug 3, 4:49 PM MDT	Special Weather Statement	RIW	Fremont	41 min
Aug 3, 5:11 PM MDT	Special Weather Statement	RIW	Johnson	64 min
Aug 3, 5:31 PM MDT	Special Weather Statement	RIW	Sweetwater	44 min

Nearby

Special Weather Statements in Wyoming, 2015 Every special weather statement in 2015

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.