Alert archive / Wyoming / High Wind Watches in 2023

High Wind Watch 39, NWS Cheyenne, WY

September 21, 20234 counties in Wyoming

NWS Cheyenne, WY issued this high wind watch at Sep 21, 2023, 2:23 PM MDT for 4 counties in Wyoming. It took effect at Sep 23, 2023, 3:00 AM MDT. It was in force for .

The area

The counties it named.

The facts

Issued: Sep 21, 2023, 2:23 PM MDT (20:23 UTC)
In effect from: Sep 23, 2023, 3:00 AM MDT
Expired: Sep 22, 2023, 4:00 AM MDT
In force
Issued by: NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 88 km from the middle of the area, began a volume at 20:25 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

Grand Junction, CO (KGJT), launched 12:00Z, 8.4 hours before the alert went out and 378 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: 2 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 3172 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind watch 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 high wind watch went out at Sep 21, 12:00 PM MDT, 2 hours 23 minutes earlier.

Area forecast discussion, Sep 21, 12:00 PM MDT, 2 hours 23 minutes before

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In the hours before

Special weather statement, Sep 21, 9:15 AM MDT, 5 hours 8 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.
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    </section>
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</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 20, 6:58 PM MDT	Special Weather Statement	CYS	Albany	47 min
Sep 21, 3:44 PM MDT	Special Weather Statement	CYS	Platte	31 min
Sep 21, 9:15 AM MDT	Special Weather Statement	CYS	Banner	30 min

Nearby

High Wind Watches in Wyoming, 2023 Every high wind watch in 2023

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.