Alert archive / Washington / River Flood Warnings in 2020
River Flood Warning 52, NWS Seattle, WA
NWS Seattle, WA issued this river flood warning at Feb 6, 2020, 4:06 AM PST for Snohomish County, Washington. It took effect at Feb 6, 2020, 7:18 PM PST. It was in force for 45 hr.
The area
The counties it named.
The facts
- Issued
- Feb 6, 2020, 4:06 AM PST (12:06 UTC)
- In effect from
- Feb 6, 2020, 7:18 PM PST
- Expired
- Feb 8, 2020, 4:39 PM PST
- In force
- 45 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 12:06 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 16.64 ft at Feb 8, 2020, 10:00 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 Feb 6, 3:07 AM PST, 59 minutes earlier.
Area forecast discussion, Feb 6, 3:07 AM PST, 59 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, Feb 6, 3:21 AM PST, 45 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 5, 5:17 PM PST | River Flood Warning | SEW | King | 21 days |
| Feb 5, 5:17 PM PST | River Flood Warning | SEW | King | 21 days |
| Feb 5, 5:17 PM PST | River Flood Warning | SEW | King | 6 days |
| Feb 5, 6:59 PM PST | River Flood Warning | SEW | King | 35 hr |
| Feb 5, 10:20 PM PST | River Flood Warning | SEW | Pierce | 44 hr |
| Feb 6, 1:38 AM PST | River Flood Warning | SEW | Pierce | 44 hr |
| Feb 6, 2:45 AM PST | Small Craft Advisory | SEW | 11 hr | |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Snohomish | 4 days |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Snohomish | 22 hr |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Pierce | 40 hr |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Lewis, Pierce | 46 hr |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Pierce, Thurston | 57 hr |
| Feb 6, 4:06 AM PST | River Flood Warning | SEW | Lewis | 67 hr |
| Feb 6, 7:40 AM PST | Areal Flood Advisory | SEW | King, Pierce, Skagit, Snohomish | 4 hr |
| Feb 6, 7:45 AM PST | Areal Flood Advisory | SEW | Island | 6 hr |
| Feb 6, 10:05 AM PST | Winter Weather Advisory | SEW | 21 hr | |
| Feb 6, 11:52 AM PST | Areal Flood Warning | SEW | King, Pierce, Snohomish | 6 hr |
| Feb 6, 1:09 PM PST | High Wind Watch | SEW | 13 hr | |
| Feb 6, 1:20 PM PST | Winter Storm Watch | SEW | 11 hr | |
| Feb 6, 1:22 PM PST | Gale Watch | SEW | 13 hr | |
| Feb 6, 3:38 PM PST | River Flood Warning | SEW | Lewis | 36 hr |
Nearby
River Flood Warnings in Washington, 2020Every river flood warning in 2020
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.