Alert archive / Montana / Red Flag Warnings in 2020

Red Flag Warning 6, NWS Glasgow, MT

April 28, 202012 counties in Montana

NWS Glasgow, MT issued this red flag warning at Apr 28, 2020, 3:13 AM MDT for 12 counties in Montana. It took effect at Apr 28, 2020, 8:00 AM MDT. It was in force for 13 hr. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Apr 28, 2020, 3:13 AM MDT (09:13 UTC)
In effect from: Apr 28, 2020, 8:00 AM MDT
Expired: Apr 28, 2020, 9:00 PM MDT
In force: 13 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 09:12 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 was reported inside it

Time	Report	Where	Remark
Apr 28, 1:38 PM MDT	TSTM WND GST 60	4 Ne Hodges, MT	BEAVER HILL I-94 DOT SITE MTBVR. SUSTAINED WINDS OF 40 MPH BEGAN AT 1008 AM. FIRST WIND GUSTOF 58 MPH AT 124 PM. PEAK WIND GUST OF 60 MPH, SO FAR, AT 138 PM.
Apr 28, 3:24 PM MDT	TSTM WND GST 80	4 Ne Hodges, MT	MESONET STATION MTBVR 3.8 NE HODGES (MT DOT). ON DAWSON/WIBAUX COUNTY LINE.
Apr 28, 3:30 PM MDT	NON-TSTM WND GST 60	5 Ese Hoyt, MT	MESONET STATION MTM28 5.2 E HOYT (MT-MESO).

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 9.2 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: 16 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 2183 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Apr 27, 6:26 PM MDT, 8 hours 47 minutes earlier.

Area forecast discussion, Apr 27, 6:26 PM MDT, 8 hours 47 minutes before

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In the hours before

Special weather statement, Apr 27, 10:00 PM MDT, 5 hours 13 minutes before

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    <section class="card" role="status" aria-live="polite">
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Local storm report, Apr 27, 10:21 PM MDT, 4 hours 52 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.
      </p>
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The office that day

Everything else NWS Glasgow, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 7:47 PM MDT	Special Weather Statement	GGW	Phillips	58 min
Apr 27, 8:28 PM MDT	Special Weather Statement	GGW	Valley	62 min
Apr 27, 8:47 PM MDT	Special Weather Statement	GGW	Valley	58 min
Apr 27, 9:06 PM MDT	Special Weather Statement	GGW	Daniels	54 min
Apr 27, 10:00 PM MDT	Special Weather Statement	GGW	Daniels, Roosevelt, Sheridan	60 min
Apr 28, 12:42 PM MDT	High Wind Warning	GGW	Wibaux	5 hr

Nearby

Red Flag Warnings in Montana, 2020 Every red flag 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.