Alert archive / California / Flash Flood Warnings in 2026

Flash Flood Warning 1, NWS Sacramento, CA

April 10, 2026Colusa County, California

NWS Sacramento, CA issued this flash flood warning at Apr 10, 2026, 5:21 PM PDT for Colusa County, California. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 10, 2026, 5:21 PM PDT (00:21 UTC)
Expired: Apr 10, 2026, 7:15 PM PDT
In force: 114 min
Issued by: NWS Sacramento, CA
Area: Storm-based polygon
Flood severity: None

County Colusa County, CA

The radar

The Beale AFB radar (KBBX), 63 km from the middle of the area, began a volume at 00:22 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.

What forecasters said that day

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

NWS Sacramento, CA wrote its last area forecast discussion before this flash flood warning went out at Apr 10, 11:39 AM PDT, 5 hours 42 minutes earlier.

Area forecast discussion, Apr 10, 11:39 AM PDT, 5 hours 42 minutes before

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In the hours before

Local storm report, Apr 10, 3:07 PM PDT, 2 hours 14 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, Apr 10, 3:32 PM PDT, 1 hour 49 minutes before

Preliminary Local Storm Report
National Weather Service Sacramento CA
332 PM PDT Fri Apr 10 2026

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

0207 PM     Hail             Ripon                   37.74N 121.13W
04/10/2026  E1.00 Inch       San Joaquin        CA   Public

            Public report of 1 inch hail, relayed via
            broadcast media. Time estimated by radar.

&&

str

The office that day

Everything else NWS Sacramento, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 10, 6:36 PM PDT	Severe Thunderstorm Warning	STO	Calaveras, San Joaquin, Stanislaus	24 min
Apr 10, 6:56 PM PDT	Severe Thunderstorm Warning	STO	Calaveras, San Joaquin, Stanislaus	49 min
Apr 10, 7:06 PM PDT	Severe Thunderstorm Warning	STO	Butte, Colusa, Glenn	39 min
Apr 10, 8:39 PM PDT	Severe Thunderstorm Warning	STO	Amador, Calaveras, Tuolumne	36 min

Nearby

Flash Flood Warnings in California, 2026 Every flash flood warning in 2026

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.