Alert archive / Montana / Red Flag Warnings in 2017

Red Flag Warning 6, NWS Glasgow, MT

July 10, 201712 counties in Montana

NWS Glasgow, MT issued this red flag warning at Jul 10, 2017, 3:20 AM MDT for 12 counties in Montana. It took effect at Jul 10, 2017, 12:00 PM MDT. It was in force for 9 hr. 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 10, 2017, 3:20 AM MDT (09:20 UTC)
In effect from: Jul 10, 2017, 12:00 PM MDT
Expired: Jul 10, 2017, 9:06 PM MDT
In force: 9 hr
Issued by: NWS Glasgow, MT

Counties Daniels County, MT, Dawson County, MT, Garfield County, MT, McCone County, MT, Petroleum County, MT, Phillips County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT

The radar

The Glasgow radar (KGGW), 77 km from the middle of the area, began a volume at 09:25 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 nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 9.3 hours before the alert went out and 360 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 56 J/kg
Mixed-layer CIN: -199 J/kg
Mixed-layer LCL: 3424 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Glasgow, MT wrote its last area forecast discussion before this red flag warning went out at Jul 9, 8:43 PM MDT, 6 hours 37 minutes earlier.

Area forecast discussion, Jul 9, 8:43 PM MDT, 6 hours 37 minutes before

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Hazardous weather outlook, Jul 9, 8:50 PM MDT, 6 hours 30 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 Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 10, 1:27 PM MDT	Special Weather Statement	GGW	Petroleum	78 min
Jul 10, 1:48 PM MDT	Special Weather Statement	GGW	Petroleum	42 min
Jul 10, 2:38 PM MDT	Special Weather Statement	GGW	Petroleum	67 min
Jul 10, 3:52 PM MDT	Special Weather Statement	GGW	Garfield	23 min
Jul 10, 4:13 PM MDT	Severe Thunderstorm Warning	GGW	Garfield, Phillips, Valley	32 min
Jul 10, 4:29 PM MDT	Special Weather Statement	GGW		61 min
Jul 10, 4:43 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Garfield, McCone, Phillips, Roosevelt, Valley	47 min
Jul 10, 5:21 PM MDT	Special Weather Statement	GGW	Richland	39 min
Jul 10, 5:32 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Dawson, McCone, Roosevelt, Valley	28 min
Jul 10, 5:56 PM MDT	Severe Thunderstorm Warning	GGW	Daniels, Dawson, McCone, Richland, Roosevelt, Sheridan and 1 more	42 min

Nearby

Red Flag Warnings in Montana, 2017 Every red flag warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.