Alert archive / New Hampshire / River Flood Warnings in 2015

River Flood Warning 7, NWS Gray, ME

April 21, 2015Merrimack County, New Hampshire

NWS Gray, ME issued this river flood warning at Apr 21, 2015, 12:26 PM EDT for Merrimack County, New Hampshire. It took effect at Apr 21, 2015, 2:00 PM EDT. It was in force for 31 hr.

The area

The counties it named.

The facts

Issued: Apr 21, 2015, 12:26 PM EDT (16:26 UTC)
In effect from: Apr 21, 2015, 2:00 PM EDT
Expired: Apr 22, 2015, 9:12 PM EDT
In force: 31 hr
Issued by: NWS Gray, ME
Area: Storm-based polygon
Flood severity: Minor

County Merrimack County, NH

The radar

The Portland,ME radar (KGYX), 132 km from the middle of the area, began a volume at 16:28 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 Suncook River at North Chichester (NCHN3). The gauge peaked at 7.40 ft at Apr 21, 2015, 10:00 PM EDT.

Action stage: 6 ft
Minor stage: 7 ft
Moderate stage: 12 ft
Major stage: 16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01089500, 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 Gray, ME wrote its last area forecast discussion before this river flood warning went out at Apr 21, 9:09 AM EDT, 3 hours 17 minutes earlier.

Area forecast discussion, Apr 21, 9:09 AM EDT, 3 hours 17 minutes before

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Hazardous weather outlook, Apr 21, 9:57 AM EDT, 2 hours 29 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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The office that day

Everything else NWS Gray, ME issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 21, 6:29 AM EDT	River Flood Warning	GYX	Oxford	14 hr
Apr 21, 6:30 AM EDT	Areal Flood Advisory	GYX	Cumberland, Sagadahoc, York	3 hr
Apr 21, 6:35 AM EDT	Areal Flood Advisory	GYX	Cumberland, Sagadahoc, York	3 hr
Apr 21, 10:10 AM EDT	River Flood Warning	GYX	Somerset	27 hr
Apr 21, 10:10 AM EDT	River Flood Warning	GYX	Kennebec	22 hr
Apr 21, 10:10 AM EDT	River Flood Warning	GYX	Kennebec	41 hr
Apr 21, 3:17 PM EDT	Small Craft Advisory for Hazardous Seas	GYX		24 hr
Apr 21, 3:48 AM EDT	Special Weather Statement	GYX	Cheshire, Hillsborough, Merrimack, Sullivan	72 min

Nearby

River Flood Warnings in New Hampshire, 2015 Every river flood warning in 2015

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.