Alert archive / Washington / River Flood Warnings in 2015

River Flood Warning 41, NWS Seattle, WA

October 31, 2015Snohomish County, Washington

NWS Seattle, WA issued this river flood warning at Oct 31, 2015, 4:41 PM PDT for Snohomish County, Washington. It took effect at Oct 31, 2015, 8:31 PM PDT. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Oct 31, 2015, 4:41 PM PDT (23:41 UTC)
In effect from: Oct 31, 2015, 8:31 PM PDT
Expired: Nov 1, 2015, 5:34 PM PST
In force: 22 hr
Issued by: NWS Seattle, WA
Area: Storm-based polygon
Flood severity: Moderate

County Snohomish County, WA

The radar

The Seattle radar (KATX), 60 km from the middle of the area, began a volume at 23:45 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 Snohomish River near Monroe (MROW1). The gauge peaked at 16.07 ft at Nov 1, 2015, 1:00 AM PST.

Action stage: 10 ft
Minor stage: 15 ft
Moderate stage: 16 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 12150800, 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 Oct 31, 3:30 PM PDT, 1 hour 11 minutes earlier.

Area forecast discussion, Oct 31, 3:30 PM PDT, 1 hour 11 minutes before

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<body>
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    <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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In the hours before

Local storm report, Oct 31, 2:17 PM PDT, 2 hours 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
217 PM PDT SAT OCT 31 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0215 PM     HEAVY RAIN       5 NNW GRAND MOUND       46.88N 123.04W
10/31/2015  M2.91 INCH       THURSTON           WA   TRAINED SPOTTER

            30 HOUR TOTAL. 1.60 INCHES OF NEW ACCUMULATION SINCE 8
            AM.

&&

JSMITH

Local storm report, Oct 31, 3:05 PM PDT, 1 hour 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
305 PM PDT SAT OCT 31 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0251 PM     HEAVY RAIN       3 SSE BONNEY LAKE       47.14N 122.15W
10/31/2015  M2.36 INCH       PIERCE             WA   TRAINED SPOTTER

            TOTAL SINCE 11 PM PDT ON 10/30.

&&

JSMITH

Special weather statement, Oct 31, 3:22 PM PDT, 1 hour 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SEATTLE WA
322 PM PDT SAT OCT 31 2015

WAZ504-507-509-555-556-558-559-568-569-012230-
SOUTHWEST INTERIOR-EVERETT AND VICINITY-TACOMA AREA-
EAST PUGET SOUND LOWLANDS-BELLEVUE AND VICINITY-SEATTLE AND VICINITY-
BREMERTON AND VICINITY-CASCADES OF SNOHOMISH AND KING COUNTIES-
CASCADES OF PIERCE AND LEWIS COUNTIES-
322 PM PDT SAT OCT 31 2015

...HEAVY RAINFALL HAS INCREASED THE RISK OF LANDSLIDES OVER
PORTIONS OF WESTERN WASHINGTON...

HEAVY RAIN HAS INCREASED THE RISK OF LANDSLIDES. PROPERTY OWNERS
IN STEEP SLOPE AREAS SHOULD KEEP AN EYE OUT FOR CHANGES SUCH AS
GROUND CRACKS OR DOWNSLOPE MOVEMENT OF PLANTS AND SOIL. IF YOU SEE
SIGNS OF A LANDSLIDE LEAVE THE AREA IMMEDIATELY IF IT IS SAFE TO
DO SO.

WWW.WEATHER.GOV/SEATTLE

Local storm report, Oct 31, 3:39 PM PDT, 1 hour 2 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>

Local storm report, Oct 31, 3:52 PM PDT, 49 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>

Local storm report, Oct 31, 4:32 PM PDT, 9 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
Oct 30, 6:28 PM PDT	River Flood Warning	SEW	King	35 hr
Oct 30, 10:05 PM PDT	River Flood Warning	SEW	Snohomish	38 hr
Oct 30, 10:05 PM PDT	River Flood Warning	SEW	King	38 hr
Oct 30, 10:05 PM PDT	River Flood Warning	SEW	King	63 hr
Oct 30, 10:05 PM PDT	Small Craft Advisory	SEW		16 hr
Oct 31, 6:44 AM PDT	River Flood Warning	SEW	Mason	55 hr
Oct 31, 8:05 AM PDT	High Surf Advisory	SEW		39 hr
Oct 31, 10:31 AM PDT	Small Craft Advisory	SEW		4 hr
Oct 31, 12:25 PM PDT	River Flood Warning	SEW	Snohomish	14 hr
Oct 31, 1:43 PM PDT	River Flood Warning	SEW	Pierce	14 hr
Oct 31, 1:43 PM PDT	River Flood Warning	SEW	Pierce	13 hr
Oct 31, 2:20 PM PDT	Areal Flood Warning	SEW	Snohomish	3 hr
Oct 31, 2:29 PM PDT	Areal Flood Advisory	SEW	Lewis, Thurston	3 hr
Oct 31, 2:42 PM PDT	Winter Storm Warning	SEW		37 hr
Oct 31, 2:58 PM PDT	River Flood Warning	SEW	Snohomish	17 hr
Oct 31, 3:26 PM PDT	River Flood Warning	SEW	Lewis	16 hr
Oct 31, 3:26 PM PDT	River Flood Warning	SEW	Lewis	31 hr
Oct 31, 3:28 PM PDT	River Flood Warning	SEW	Lewis, Pierce	11 hr
Oct 31, 4:41 PM PDT	River Flood Warning	SEW	Snohomish	39 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.