Alert archive / California / River Flood Warnings in 2019

River Flood Warning 11, NWS San Francisco Bay Area, CA

February 26, 2019Napa County, California

NWS San Francisco Bay Area, CA issued this river flood warning at Feb 26, 2019, 4:28 AM PST for Napa County, California. It took effect at Feb 26, 2019, 8:06 PM PST. It was in force for 20 days.

The area

The counties it named.

The facts

Issued: Feb 26, 2019, 4:28 AM PST (12:28 UTC)
In effect from: Feb 26, 2019, 8:06 PM PST
Expired: Mar 19, 2019, 5:28 AM PDT
In force: 20 days
Issued by: NWS San Francisco Bay Area, CA
Area: Storm-based polygon
Flood severity: Minor

County Napa County, CA

The radar

The Sacramento radar (KDAX), 57 km from the middle of the area, began a volume at 12:31 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 Napa River near St. Helena (SHEC1). The gauge peaked at 19.44 ft at Feb 27, 2019, 4:00 AM PST.

Action stage: 16 ft
Minor stage: 18 ft
Moderate stage: 20 ft
Major stage: 22 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 11456000, 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 San Francisco Bay Area, CA wrote its last area forecast discussion before this river flood warning went out at Feb 26, 3:40 AM PST, 48 minutes earlier.

Area forecast discussion, Feb 26, 3:40 AM PST, 48 minutes before

<!doctype html>
<html lang="en">
<head>
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  <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

Local storm report, Feb 25, 10:49 PM PST, 5 hours 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
1049 PM PST MON FEB 25 2019

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

1032 PM     FLOOD            3 ESE TEMELEC           38.24N 122.45W
02/25/2019                   SONOMA             CA   LAW ENFORCEMENT

            SR 121 AT SCHELLVILLE FIRE CLOSED.

1031 PM     DEBRIS FLOW      2 SE GUERNEVILLE        38.49N 122.96W
02/25/2019                   SONOMA             CA   LAW ENFORCEMENT

            MUD SLIDE AND OTHER DEBRIS IN WESTBOUND
            LANE. ON WB 116 BETWEEN CANYON AND TRENTON.

1031 PM     DEBRIS FLOW      3 ENE ROHNERT PARK      38.37N 122.65W
02/25/2019                   SONOMA             CA   LAW ENFORCEMENT

            DEBRIS FLOW ON EASTBOUND CRANE CANYON HALF A
            MILE FROM JUNCTION WITH PETALUMA HILL RD.

&&

Local storm report, Feb 26, 12:47 AM PST, 3 hours 41 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, Feb 26, 1:37 AM PST, 2 hours 51 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, Feb 26, 2:51 AM PST, 1 hour 37 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, Feb 26, 3:36 AM PST, 52 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 San Francisco Bay Area, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 25, 9:14 PM PST	Small Craft Advisory	MTR		16 hr
Feb 25, 9:33 PM PST	Areal Flood Advisory	MTR	Marin, Napa, Sonoma	12 hr
Feb 25, 11:10 PM PST	Areal Flood Warning	MTR	Sonoma	18 hr
Feb 25, 11:26 PM PST	River Flood Warning	MTR	Sonoma	4 days
Feb 25, 11:26 PM PST	River Flood Warning	MTR	Napa	21 days
Feb 26, 9:31 AM PST	Areal Flood Advisory	MTR	Marin, Napa, Sonoma	16 hr
Feb 26, 10:58 AM PST	River Flood Warning	MTR	Sonoma	21 days

Nearby

River Flood Warnings in California, 2019 Every river flood warning in 2019

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.