Alert archive / California / River Flood Warnings in 2025

River Flood Warning 1, NWS Reno, NV

February 4, 2025Lassen County, California

NWS Reno, NV issued this river flood warning at Feb 4, 2025, 8:18 PM PST for Lassen County, California. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Feb 4, 2025, 8:18 PM PST (04:18 UTC)
Expired: Feb 5, 2025, 6:40 AM PST
In force: 10 hr
Issued by: NWS Reno, NV
Area: Storm-based polygon
Flood severity: Minor

County Lassen County, CA

The radar

The Reno radar (KRGX), 140 km from the middle of the area, began a volume at 04:18 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 Susan River at Susanville (SUSC1).

Action stage: 10.5 ft
Minor stage: 12 ft
Moderate stage: 13 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 10356500, 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 Reno, NV wrote its last area forecast discussion before this river flood warning went out at Feb 4, 2:31 PM PST, 5 hours 47 minutes earlier.

Area forecast discussion, Feb 4, 2:31 PM PST, 5 hours 47 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 Reno, NV issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 5, 1:36 PM PST	Winter Storm Warning	REV	Douglas, Washoe	44 hr
Feb 5, 1:36 PM PST	Winter Weather Advisory	REV	Douglas, Lyon, Storey, Washoe	44 hr
Feb 5, 7:24 AM PST	Areal Flood Warning	REV	Lassen	7 hr
Feb 5, 2:51 PM PST	Areal Flood Advisory	REV	Lassen	9 hr

Nearby

River Flood Warnings in California, 2025 Every river flood warning in 2025

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.