Alert archive / Montana / Red Flag Warnings in 2019

Red Flag Warning 1, NWS Great Falls, MT

July 24, 201917 counties in Montana

NWS Great Falls, MT issued this red flag warning at Jul 24, 2019, 2:39 AM MDT for 17 counties in Montana. It took effect at Jul 24, 2019, 12:00 PM MDT. It was in force for 33 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 24, 2019, 2:39 AM MDT (08:39 UTC)
In effect from: Jul 24, 2019, 12:00 PM MDT
Expired: Jul 25, 2019, 9:00 PM MDT
In force: 33 hr
Issued by: NWS Great Falls, MT

Counties Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Gallatin County, MT, Glacier County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Phillips County, MT, Pondera County, MT, Teton County, MT, Toole County, MT

The radar

The Great Falls radar (KTFX), 33 km from the middle of the area, began a volume at 08:41 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

Spokane, WA (KOTX), launched 00:00Z, 8.7 hours before the alert went out and 407 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: 136 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 3135 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 101 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 Great Falls, MT wrote its last area forecast discussion before this red flag warning went out at Jul 23, 11:45 PM MDT, 2 hours 54 minutes earlier.

Area forecast discussion, Jul 23, 11:45 PM MDT, 2 hours 54 minutes before

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In the hours before

Special weather statement, Jul 23, 8:48 PM MDT, 5 hours 51 minutes before

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Special weather statement, Jul 23, 9:38 PM MDT, 5 hours 1 minute before

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      <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.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 23, 9:49 PM MDT, 4 hours 50 minutes before

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    <section class="card" role="status" aria-live="polite">
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      <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.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 23, 10:11 PM MDT, 4 hours 28 minutes before

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<body>
  <main class="wrap">
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      <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.
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      <p class="small" id="detail">
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Special weather statement, Jul 23, 11:25 PM MDT, 3 hours 14 minutes before

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  <main class="wrap">
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      <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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Special weather statement, Jul 23, 11:56 PM MDT, 2 hours 43 minutes before

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<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 Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 23, 6:32 PM MDT	Special Weather Statement	TFX	Judith Basin	13 min
Jul 23, 7:02 PM MDT	Special Weather Statement	TFX	Cascade	28 min
Jul 23, 7:04 PM MDT	Special Weather Statement	TFX	Cascade	26 min
Jul 23, 7:22 PM MDT	Special Weather Statement	TFX		23 min
Jul 23, 7:23 PM MDT	Special Weather Statement	TFX		37 min
Jul 23, 7:25 PM MDT	Special Weather Statement	TFX	Pondera	35 min
Jul 23, 7:30 PM MDT	Special Weather Statement	TFX	Meagher	30 min
Jul 23, 7:42 PM MDT	Special Weather Statement	TFX	Chouteau	33 min
Jul 23, 7:45 PM MDT	Special Weather Statement	TFX		30 min
Jul 23, 8:19 PM MDT	Special Weather Statement	TFX	Liberty	26 min
Jul 23, 8:22 PM MDT	Special Weather Statement	TFX		23 min
Jul 23, 8:48 PM MDT	Special Weather Statement	TFX	Hill, Liberty	42 min
Jul 23, 9:38 PM MDT	Special Weather Statement	TFX	Blaine	37 min
Jul 23, 9:49 PM MDT	Special Weather Statement	TFX	Hill	41 min
Jul 23, 10:11 PM MDT	Special Weather Statement	TFX	Hill	49 min
Jul 23, 11:25 PM MDT	Special Weather Statement	TFX	Fergus	50 min
Jul 23, 11:56 PM MDT	Special Weather Statement	TFX	Blaine	49 min
Jul 24, 2:10 PM MDT	Special Weather Statement	TFX	Madison	50 min
Jul 24, 2:58 PM MDT	Special Weather Statement	TFX	Gallatin	47 min
Jul 24, 3:45 PM MDT	Special Weather Statement	TFX	Gallatin	45 min
Jul 24, 4:29 PM MDT	Special Weather Statement	TFX	Madison	46 min

Nearby

Red Flag Warnings in Montana, 2019 Every red flag warning in 2019

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.