Alert archive / Washington / River Flood Warnings in 2015

River Flood Warning 128, NWS Seattle, WA

December 9, 2015Snohomish County, Washington

NWS Seattle, WA issued this river flood warning at Dec 9, 2015, 8:57 AM PST for Snohomish County, Washington. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2015, 8:57 AM PST (16:57 UTC)
Expired: Dec 10, 2015, 1:44 AM PST
In force: 17 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Minor

County Snohomish County, WA

The radar

The Seattle radar (KATX), 60 km from the middle of the area, began a volume at 16:56 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 Stillaguamish River at Arlington (ARLW1).

Action stage: 12.5 ft
Minor stage: 14 ft
Moderate stage: 17.5 ft
Major stage: 19 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12167400, 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 Dec 9, 4:07 AM PST, 4 hours 50 minutes earlier.

Area forecast discussion, Dec 9, 4:07 AM PST, 4 hours 50 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
Dec 8, 5:40 PM PST	River Flood Warning	SEW	Grays Harbor	6 days
Dec 8, 8:56 PM PST	Gale Warning	SEW		54 hr
Dec 8, 10:58 PM PST	River Flood Warning	SEW	Skagit	54 hr
Dec 8, 10:58 PM PST	River Flood Warning	SEW	Pierce	26 hr
Dec 9, 2:51 AM PST	High Wind Watch	SEW		12 hr
Dec 9, 2:51 AM PST	Winter Weather Advisory	SEW		12 hr
Dec 9, 2:53 AM PST	Gale Watch	SEW		12 hr
Dec 9, 4:31 AM PST	River Flood Warning	SEW	King	38 hr
Dec 9, 5:02 AM PST	River Flood Warning	SEW	King	18 hr
Dec 9, 5:07 AM PST	River Flood Warning	SEW	Pierce, Thurston	57 hr
Dec 9, 6:23 AM PST	River Flood Warning	SEW	Clallam	13 hr
Dec 9, 2:06 PM PST	River Flood Warning	SEW	Lewis	31 hr
Dec 9, 2:20 PM PST	Coastal Flood Warning	SEW		38 hr
Dec 9, 2:20 PM PST	Coastal Flood Advisory	SEW	San Juan	28 hr
Dec 9, 2:34 PM PST	Wind Advisory	SEW	San Juan	28 hr
Dec 9, 2:40 PM PST	Gale Watch	SEW		7 hr
Dec 9, 2:40 PM PST	Small Craft Advisory	SEW		7 hr
Dec 9, 2:51 PM PST	Winter Weather Advisory	SEW		33 hr

Nearby

River Flood Warnings in Washington, 2015 Every river flood warning in 2015

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.