Alert archive / Colorado / Flash Flood Warnings in 2026

Flash Flood Warning 8, NWS Grand Junction, CO

July 17, 2026San Miguel County, Colorado

NWS Grand Junction, CO issued this flash flood warning at Jul 17, 2026, 3:43 PM MDT for San Miguel County, Colorado. It was in force for 77 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 17, 2026, 3:43 PM MDT (21:43 UTC)
Expired: Jul 17, 2026, 5:00 PM MDT
In force: 77 min
Issued by: NWS Grand Junction, CO
Area: Storm-based polygon
Flood severity: None

County San Miguel County, CO

The radar

The Grand Junction radar (KGJX), 119 km from the middle of the area, began a volume at 21:42 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Junction, CO wrote its last area forecast discussion before this flash flood warning went out at Jul 17, 12:02 PM MDT, 3 hours 41 minutes earlier.

Area forecast discussion, Jul 17, 12:02 PM MDT, 3 hours 41 minutes before

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</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>
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  <script src="index.js"></script>
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In the hours before

Local storm report, Jul 17, 10:43 AM MDT, 5 hours 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, Jul 17, 10:58 AM MDT, 4 hours 45 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 Grand Junction, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 17, 2:48 PM MDT	Areal Flood Advisory	GJT	Ouray	5 hr
Jul 17, 3:10 PM MDT	Flash Flood Warning Considerable damage threat	GJT	Rio Blanco	3 hr
Jul 17, 3:31 PM MDT	Areal Flood Advisory	GJT	San Miguel	13 min
Jul 17, 3:57 PM MDT	Flash Flood Warning Considerable damage threat	GJT	Dolores	3 hr
Jul 16, 6:37 PM MDT	Flash Flood Warning Considerable damage threat	GJT	Grand, San Juan	3 hr

Nearby

Flash Flood Warnings in Colorado, 2026 Every flash flood warning in 2026

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.