Alert archive / Washington / River Flood Warnings in 2018

River Flood Warning 12, NWS Seattle, WA

February 4, 2018Whatcom County, Washington

NWS Seattle, WA issued this river flood warning at Feb 4, 2018, 4:28 PM PST for Whatcom County, Washington. It took effect at Feb 4, 2018, 8:05 PM PST. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: Feb 4, 2018, 4:28 PM PST (00:28 UTC)
In effect from: Feb 4, 2018, 8:05 PM PST
Expired: Feb 5, 2018, 12:52 PM PST
In force: 17 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County Whatcom County, WA

The radar

The Seattle radar (KATX), 84 km from the middle of the area, began a volume at 00:33 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 river

Written for the forecast point Nooksack River at North Cedarvillle (NRKW1). The gauge peaked at 146.15 ft at Feb 4, 2018, 6:00 PM PST.

Action stage: 144.8 ft
Minor stage: 146.5 ft
Moderate stage: 148 ft
Major stage: 150 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12210700, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Seattle, WA wrote its last area forecast discussion before this river flood warning went out at Feb 4, 2:53 PM PST, 1 hour 35 minutes earlier.

Area forecast discussion, Feb 4, 2:53 PM PST, 1 hour 35 minutes before

<!doctype html>
<html lang="en">
<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
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</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, Feb 4, 2:10 PM PST, 2 hours 18 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 Seattle, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 4, 8:51 PM PST	River Flood Warning	SEW	Snohomish	65 hr
Feb 4, 9:33 PM PST	River Flood Warning	SEW	Snohomish	40 hr
Feb 5, 2:03 AM PST	Small Craft Advisory	SEW		7 hr

Nearby

River Flood Warnings in Washington, 2018 Every river flood warning 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.