Alert archive / California / Special Weather Statements in 2023

Special Weather Statement, NWS Eureka, CA

August 18, 2023Trinity County, California

NWS Eureka, CA issued this special weather statement at Aug 18, 2023, 5:32 PM PDT for Trinity County, California. It was in force for 28 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 18, 2023, 5:32 PM PDT (00:32 UTC)
Expired: Aug 18, 2023, 6:00 PM PDT
In force: 28 min
Issued by: NWS Eureka, CA
Hail: 0.88 in
Wind: 30

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 99 km from the middle of the area, began a volume at 00:35 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

Reno, NV (KREV), launched 00:00Z, 0.5 hours before the alert went out and 436 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: 63 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 2290 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!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>

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 Eureka, CA wrote its last area forecast discussion before this special weather statement went out at Aug 18, 3:02 PM PDT, 2 hours 30 minutes earlier.

Area forecast discussion, Aug 18, 3:02 PM PDT, 2 hours 30 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

Special weather statement, Aug 18, 5:26 PM PDT, 6 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, Aug 18, 5:32 PM PDT, 0 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 Eureka, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 18, 5:26 PM PDT	Special Weather Statement	EKA	Trinity	34 min
Aug 18, 6:26 PM PDT	Special Weather Statement	EKA	Trinity	34 min
Aug 19, 3:35 AM PDT	Red Flag Warning	EKA		16 hr
Aug 19, 9:02 AM PDT	Small Craft Advisory	EKA		39 hr
Aug 19, 12:36 PM PDT	Special Weather Statement	EKA	Trinity	39 min
Aug 19, 1:15 PM PDT	Flash Flood Warning Considerable damage threat	EKA	Trinity	3 hr
Aug 19, 2:30 PM PDT	Special Weather Statement	EKA		45 min
Aug 19, 2:32 PM PDT	Special Weather Statement	EKA	Mendocino	43 min
Aug 19, 2:41 PM PDT	Special Weather Statement	EKA	Trinity	34 min
Aug 19, 2:45 PM PDT	Special Weather Statement	EKA	Humboldt	45 min
Aug 19, 2:54 PM PDT	Special Weather Statement	EKA	Humboldt	36 min
Aug 19, 3:10 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Mendocino, Trinity	20 min
Aug 19, 3:17 PM PDT	Special Weather Statement	EKA	Trinity	43 min
Aug 19, 3:50 PM PDT	Flash Flood Warning	EKA	Trinity	85 min

Nearby

Special Weather Statements in California, 2023 Every special weather statement 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.