Alert archive / Pennsylvania / River Flood Warnings in 2020

River Flood Warning 11, NWS State College, PA

December 23, 20204 counties in Pennsylvania

NWS State College, PA issued this river flood warning at Dec 23, 2020, 1:28 PM EST for 4 counties in Pennsylvania. It took effect at Dec 26, 2020, 2:00 AM EST. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued: Dec 23, 2020, 1:28 PM EST (18:28 UTC)
In effect from: Dec 26, 2020, 2:00 AM EST
Expired: Dec 27, 2020, 10:56 AM EST
In force: 33 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: Minor

Counties Columbia County, PA, Montour County, PA, Northumberland County, PA, Union County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 18:33 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 Susquehanna River at Danville (DANP1). The gauge peaked at 20.23 ft at Dec 27, 2020, 1:00 AM EST.

Action stage: 15 ft
Minor stage: 20 ft
Moderate stage: 23 ft
Major stage: 30 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01540500, 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 State College, PA wrote its last area forecast discussion before this river flood warning went out at Dec 23, 1:12 PM EST, 16 minutes earlier.

Area forecast discussion, Dec 23, 1:12 PM EST, 16 minutes before

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Hazardous weather outlook, Dec 23, 4:37 AM EST, 8 hours 51 minutes before

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<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.
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</body>
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The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 23, 3:48 AM EST	Winter Storm Watch	CTP	Somerset, Warren	30 hr
Dec 23, 1:28 PM EST	River Flood Warning	CTP	Columbia	4 days
Dec 23, 3:02 PM EST	Winter Weather Advisory	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 1 more	52 hr
Dec 23, 5:53 PM EST	River Flood Warning	CTP	Lycoming, Sullivan	43 hr

Nearby

River Flood Warnings in Pennsylvania, 2020 Every 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.