Alert archive / Utah / Snow Squall Warnings in 2023

Snow Squall Warning 4, NWS Salt Lake City, UT

February 27, 2023Tooele County, Utah

NWS Salt Lake City, UT issued this snow squall warning at Feb 27, 2023, 11:58 PM MST for Tooele County, Utah. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 27, 2023, 11:58 PM MST (06:58 UTC)
Expired: Feb 28, 2023, 1:00 AM MST
In force: 62 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon

County Tooele County, UT

The radar

The Salt Lake City radar (KMTX), 107 km from the middle of the area, began a volume at 06:57 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 00:00Z, 7.0 hours before the alert went out and 422 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1723 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 290 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 snow squall warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this snow squall warning went out at Feb 27, 4:19 PM MST, 7 hours 39 minutes earlier.

Area forecast discussion, Feb 27, 4:19 PM MST, 7 hours 39 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>

In the hours before

Local storm report, Feb 27, 8:51 PM MST, 3 hours 7 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>

Special weather statement, Feb 27, 11:19 PM MST, 39 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 Salt Lake City, UT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 27, 11:19 PM MST	Special Weather Statement	SLC		41 min
Feb 28, 12:42 AM MST	Snow Squall Warning	SLC	Davis, Salt Lake, Tooele	63 min
Feb 28, 1:45 AM MST	Snow Squall Warning	SLC	Box Elder, Cache, Davis, Morgan, Weber	15 min
Feb 28, 1:48 AM MST	Snow Squall Warning	SLC	Davis, Morgan, Salt Lake, Tooele, Utah, Weber	42 min
Feb 28, 2:38 AM MST	Snow Squall Warning	SLC	Salt Lake, Summit, Utah	22 min
Feb 28, 2:49 AM MST	Snow Squall Warning	SLC	Utah, Wasatch	26 min
Feb 28, 3:21 AM MST	Snow Squall Warning	SLC	Beaver, Juab, Millard, Piute, Sanpete, Sevier	39 min
Feb 28, 4:47 AM MST	Snow Squall Warning	SLC	Beaver, Garfield, Iron, Washington	43 min
Feb 28, 3:37 AM MST	Snow Squall Warning	SLC	Uinta	68 min

Nearby

Snow Squall Warnings in Utah, 2023 Every snow squall warning 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.