Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 35, NWS Pittsburgh, PA

March 11, 2011Allegheny County, Pennsylvania

NWS Pittsburgh, PA issued this river flood warning at Mar 11, 2011, 10:03 AM EST for Allegheny County, Pennsylvania. It took effect at Mar 11, 2011, 8:55 PM EST. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Mar 11, 2011, 10:03 AM EST (15:03 UTC)
In effect from: Mar 11, 2011, 8:55 PM EST
Expired: Mar 12, 2011, 7:17 AM EST
In force: 10 hr
Issued by: NWS Pittsburgh, PA
Flood severity: Minor

County Allegheny County, PA

The radar

The Pittsburgh radar (KPBZ), 21 km from the middle of the area, began a volume at 15:06 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 Allegheny River at C.W. Bill Young Lock and Dam (ACMP1).

Action stage: 15 ft
Minor stage: 17 ft
Moderate stage: 20 ft
Major stage: 23 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 03049640, 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 Pittsburgh, PA wrote its last area forecast discussion before this river flood warning went out at Mar 10, 5:52 PM EST, 16 hours 11 minutes earlier.

Area forecast discussion, Mar 10, 5:52 PM EST, 16 hours 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>
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        Please try again in a few minutes.
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      <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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Hazardous weather outlook, Mar 10, 5:53 PM EST, 16 hours 10 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 Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 10, 9:54 PM EST	Areal Flood Warning	PBZ	Armstrong, Clarion, Indiana, Jefferson	12 hr
Mar 11, 4:27 AM EST	River Flood Warning	PBZ	Clarion, Forest, Jefferson	38 hr
Mar 11, 10:47 AM EST	Areal Flood Warning	PBZ	Allegheny, Beaver	11 hr
Mar 11, 11:05 AM EST	Areal Flood Warning	PBZ	Lawrence	11 hr
Mar 10, 9:11 PM EST	Areal Flood Warning	PBZ	Columbiana, Coshocton, Harrison, Jefferson, Tuscarawas	40 hr

Nearby

River Flood Warnings in Pennsylvania, 2011 Every river flood warning in 2011

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.