Alert archive / Wyoming / Special Weather Statements in 2018

Special Weather Statement, NWS Riverton, WY

August 24, 2018Sweetwater County, Wyoming

NWS Riverton, WY issued this special weather statement at Aug 24, 2018, 1:08 PM MDT for Sweetwater County, Wyoming. It was in force for 37 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 24, 2018, 1:08 PM MDT (19:08 UTC)
Expired
Aug 24, 2018, 1:45 PM MDT
In force
37 min
Issued by
NWS Riverton, WY

County Sweetwater County, WY

The radar

The Riverton/Lander radar (KRIW), 188 km from the middle of the area, began a volume at 19:10 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

Riverton, WY (KRIW), launched 12:00Z, 7.1 hours before the alert went out and 189 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-pSkew-T log-p diagram, Riverton, WY at 12:00Z on 2018-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 12:00Z on 2018-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2956 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Riverton, WY wrote its last area forecast discussion before this special weather statement went out at Aug 23, 5:35 PM MDT, 19 hours 33 minutes earlier.

Area forecast discussion, Aug 23, 5:35 PM MDT, 19 hours 33 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>
</body>
</html>

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 1:16 PM MDTRed Flag WarningRIWFremont, Johnson, Lincoln, Natrona, Sublette, Sweetwater56 hr
Aug 24, 1:16 PM MDTRed Flag WarningRIWLincoln, Sublette, Sweetwater, Uinta56 hr
Aug 24, 1:39 PM MDTSpecial Weather StatementRIWSweetwater36 min
Aug 24, 2:13 PM MDTSpecial Weather StatementRIW32 min
Aug 24, 2:49 PM MDTSpecial Weather StatementRIW26 min
Aug 24, 2:56 PM MDTSpecial Weather StatementRIWSweetwater34 min
Aug 24, 3:24 PM MDTSpecial Weather StatementRIW36 min
Aug 24, 3:36 PM MDTSpecial Weather StatementRIW24 min
Aug 24, 3:38 PM MDTSpecial Weather StatementRIWSublette37 min
Aug 24, 4:01 PM MDTSpecial Weather StatementRIWFremont29 min
Aug 24, 4:36 PM MDTSpecial Weather StatementRIWFremont24 min
Aug 24, 4:43 PM MDTSpecial Weather StatementRIW32 min
Aug 24, 4:50 PM MDTSpecial Weather StatementRIWFremont40 min
Aug 24, 5:03 PM MDTSpecial Weather StatementRIW27 min
Aug 24, 5:37 PM MDTSpecial Weather StatementRIW23 min
Aug 24, 5:51 PM MDTSpecial Weather StatementRIW39 min
Aug 24, 5:52 PM MDTSpecial Weather StatementRIW38 min

Nearby

Special Weather Statements in Wyoming, 2018Every special weather statement in 2018

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.