Alert archive / Colorado / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 174, NWS Denver/Boulder, CO

July 22, 2009Boulder County, Larimer County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 22, 2009, 2:47 PM MDT for Boulder County, Larimer County, Colorado. It was in force for 37 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: Jul 22, 2009, 2:47 PM MDT (20:47 UTC)
Expired: Jul 22, 2009, 3:24 PM MDT
In force: 37 min
Issued by: NWS Denver/Boulder, CO
Area: Storm-based polygon

Counties Boulder County, CO, Larimer County, CO

The radar

The Denver radar (KFTG), 99 km from the middle of the area, began a volume at 20:46 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 22, 3:15 AM MDT, 11 hours 32 minutes earlier.

Area forecast discussion, Jul 22, 3:15 AM MDT, 11 hours 32 minutes before

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Hazardous weather outlook, Jul 22, 2:18 PM MDT, 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 Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 21, 7:12 PM MDT	Special Weather Statement	BOU	Park	48 min
Jul 21, 7:26 PM MDT	Special Weather Statement	BOU	Adams	34 min
Jul 21, 8:17 PM MDT	Special Weather Statement	BOU	Douglas	28 min
Jul 21, 8:37 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Washington	38 min
Jul 21, 9:15 PM MDT	Severe Thunderstorm Warning	BOU	Washington	30 min
Jul 21, 9:28 PM MDT	Special Weather Statement	BOU	Douglas	32 min
Jul 21, 9:48 PM MDT	Severe Thunderstorm Warning	BOU	Douglas	27 min
Jul 21, 9:54 PM MDT	Areal Flood Advisory	BOU	Douglas, Jefferson, Park	81 min
Jul 22, 4:27 PM MDT	Special Weather Statement	BOU	Morgan	33 min
Jul 22, 5:23 PM MDT	Special Weather Statement	BOU	Weld	22 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2009 Every severe thunderstorm warning in 2009

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.