Alert archive / Wyoming / Special Weather Statements in 2019

Special Weather Statement, NWS Riverton, WY

June 7, 2019

NWS Riverton, WY issued this special weather statement at Jun 7, 2019, 5:21 PM MDT. It was in force for 24 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
Jun 7, 2019, 5:21 PM MDT (23:21 UTC)
Expired
Jun 7, 2019, 5:45 PM MDT
In force
24 min
Issued by
NWS Riverton, WY

The radar

The Riverton/Lander radar (KRIW), 120 km from the middle of the area, began a volume at 23:22 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

Rapid City, SD (KRAP), launched 12:00Z, 11.4 hours before the alert went out and 345 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, Rapid City, SD at 12:00Z on 2019-06-07Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 12:00Z on 2019-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.1939Sfc1 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
2420 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
2 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 Jun 7, 3:00 PM MDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jun 7, 3:00 PM MDT, 2 hours 21 minutes before
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Hazardous weather outlook, Jun 7, 3:05 AM MDT, 14 hours 16 minutes before
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      <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.
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        Please try again in a few minutes.
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In the hours before

Special weather statement, Jun 7, 2:32 PM MDT, 2 hours 49 minutes before
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Special weather statement, Jun 7, 4:50 PM MDT, 31 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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Special weather statement, Jun 7, 5:21 PM MDT, 0 minutes before
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<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.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 6:18 PM MDTSpecial Weather StatementRIW42 min
Jun 6, 6:38 PM MDTSpecial Weather StatementRIWLincoln37 min
Jun 6, 6:49 PM MDTSpecial Weather StatementRIWTeton41 min
Jun 6, 6:58 PM MDTSevere Thunderstorm WarningRIWLincoln, Sublette32 min
Jun 6, 7:04 PM MDTSpecial Weather StatementRIW41 min
Jun 6, 7:18 PM MDTSpecial Weather StatementRIWSublette27 min
Jun 6, 7:27 PM MDTSpecial Weather StatementRIWLincoln33 min
Jun 6, 7:30 PM MDTSpecial Weather StatementRIWSublette30 min
Jun 6, 7:52 PM MDTSpecial Weather StatementRIW38 min
Jun 6, 7:54 PM MDTSpecial Weather StatementRIWSublette51 min
Jun 6, 8:05 PM MDTSpecial Weather StatementRIWSublette40 min
Jun 6, 8:35 PM MDTSpecial Weather StatementRIWFremont, Hot Springs40 min
Jun 6, 9:03 PM MDTSpecial Weather StatementRIWTeton42 min
Jun 6, 9:17 PM MDTSpecial Weather StatementRIWFremont, Hot Springs43 min
Jun 6, 9:53 PM MDTSpecial Weather StatementRIWFremont52 min
Jun 7, 9:38 AM MDTAreal Flood AdvisoryRIWFremont24 hr
Jun 7, 2:32 PM MDTSpecial Weather StatementRIWBig Horn43 min
Jun 7, 4:50 PM MDTSpecial Weather StatementRIWJohnson25 min

Nearby

Special Weather Statements in Wyoming, 2019Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.