Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 41, NWS Glasgow, MT

June 7, 2018Prairie County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 7, 2018, 6:19 PM MDT for Prairie County, Montana. It was in force for 56 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
Jun 7, 2018, 6:19 PM MDT (00:19 UTC)
Expired
Jun 7, 2018, 7:15 PM MDT
In force
56 min
Issued by
NWS Glasgow, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Prairie County, MT

The radar

The Glasgow radar (KGGW), 176 km from the middle of the area, began a volume at 00:19 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 7, 6:09 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.3 hours before the alert went out and 177 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-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2018-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1368 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2018-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1368 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1662 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-1.4

Open this sounding in Storm Lab

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 7, 12:59 PM MDT, 5 hours 20 minutes earlier.

Area forecast discussion, Jun 7, 12:59 PM MDT, 5 hours 20 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>

In the hours before

Special weather statement, Jun 7, 1:28 PM MDT, 4 hours 51 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>
Special weather statement, Jun 7, 5:12 PM MDT, 1 hour 7 minutes before
Special Weather Statement
National Weather Service Glasgow MT
512 PM MDT THU JUN 7 2018

MTZ017-061-080000-
Northern Valley MT-Central and Southern Valley MT-
512 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL VALLEY COUNTY UNTIL
600 PM MDT...

At 511 PM MDT, Doppler radar was tracking a strong thunderstorm 11
miles south of Hinsdale, or 22 miles west of Glasgow, moving
northeast at 25 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Hinsdale, Tampico and Vandalia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4817 10710 4827 10727 4863 10704 4839 10655
TIME...MOT...LOC 2311Z 218DEG 21KT 4824 10713

GAH
Special weather statement, Jun 7, 5:57 PM MDT, 22 minutes before
Special Weather Statement
National Weather Service Glasgow MT
557 PM MDT THU JUN 7 2018

MTZ017-061-080045-
Northern Valley MT-Central and Southern Valley MT-
557 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN VALLEY COUNTY UNTIL
645 PM MDT...

At 556 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles northeast of Hinsdale, or 28 miles northwest of Glasgow, moving
north at 30 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Thoeny.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 4846 10690 4853 10712 4893 10700 4883 10642
TIME...MOT...LOC 2356Z 192DEG 25KT 4853 10699

GAH
Special weather statement, Jun 7, 6:11 PM MDT, 8 minutes before
Special Weather Statement
National Weather Service Glasgow MT
611 PM MDT THU JUN 7 2018

MTZ026-080100-
Prairie MT-
611 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL PRAIRIE COUNTY
UNTIL 700 PM MDT...

At 611 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles southwest of Terry, moving northwest at 5 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Terry, Zero, Mccloud and Calypso.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 100 AM MDT for
northeastern Montana.

LAT...LON 4660 10545 4660 10549 4666 10549 4666 10558
      4674 10558 4675 10562 4683 10562 4683 10572
      4700 10560 4669 10500 4657 10539 4657 10545
TIME...MOT...LOC 0011Z 151DEG 5KT 4662 10553

GAH
Special weather statement, Jun 7, 6:15 PM MDT, 4 minutes before
Special Weather Statement
National Weather Service Glasgow MT
615 PM MDT THU JUN 7 2018

MTZ017-018-061-080115-
Northern Valley MT-Daniels MT-Central and Southern Valley MT-
615 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN DANIELS AND CENTRAL
VALLEY COUNTIES UNTIL 715 PM MDT...

At 615 PM MDT, Doppler radar was tracking a strong thunderstorm near
Tampico, or 9 miles north of Glasgow, moving northeast at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
St. Marie, Baylor and Larslan.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A severe thunderstorm watch remains in effect until 100 AM MDT for
northeastern Montana.

LAT...LON 4821 10667 4834 10685 4882 10641 4850 10589
TIME...MOT...LOC 0015Z 226DEG 22KT 4834 10668

GAH
Local storm report, Jun 7, 6:18 PM MDT, 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
618 PM MDT THU JUN 7 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0545 PM     HAIL             5 S TAMPICO             48.23N 106.84W
06/07/2018  M0.88 INCH       VALLEY             MT   TRAINED SPOTTER

&&

BCB

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 6:11 PM MDTSpecial Weather StatementGGWPrairie49 min
Jun 7, 6:15 PM MDTSpecial Weather StatementGGWValley60 min
Jun 7, 6:42 PM MDTSpecial Weather StatementGGWDawson, Prairie63 min
Jun 7, 7:07 PM MDTSpecial Weather StatementGGWDaniels53 min
Jun 7, 7:12 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Prairie, Richland63 min
Jun 7, 7:34 PM MDTAreal Flood AdvisoryGGWDawson, McCone, Prairie2 hr
Jun 7, 7:48 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Richland, Roosevelt27 min
Jun 7, 7:50 PM MDTFlash Flood WarningGGWDawson, McCone, Prairie3 hr
Jun 7, 7:57 PM MDTSpecial Weather StatementGGWDaniels63 min
Jun 7, 8:05 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Prairie, Richland43 min
Jun 7, 8:08 PM MDTSevere Thunderstorm WarningGGWDawson, McCone, Richland, Roosevelt67 min
Jun 7, 8:30 PM MDTSpecial Weather StatementGGWSheridan60 min
Jun 7, 8:37 PM MDTFlash Flood WarningGGWDawson, McCone, Richland, Roosevelt3 hr
Jun 7, 8:43 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan62 min
Jun 7, 8:47 PM MDTSpecial Weather StatementGGWDawson, Prairie, Richland, Wibaux43 min
Jun 7, 8:57 PM MDTSevere Thunderstorm WarningGGWMcCone, Richland, Roosevelt36 min
Jun 7, 9:03 PM MDTSevere Thunderstorm WarningGGWDaniels, Richland, Roosevelt, Sheridan46 min
Jun 7, 9:28 PM MDTSpecial Weather StatementGGWRoosevelt, Sheridan62 min
Jun 7, 9:32 PM MDTSevere Thunderstorm WarningGGWDaniels, Roosevelt, Sheridan35 min
Jun 7, 9:38 PM MDTSevere Thunderstorm WarningGGWSheridan40 min
Jun 7, 10:10 PM MDTAreal Flood AdvisoryGGWDaniels, Sheridan3 hr
Jun 8, 4:06 PM MDTSpecial Weather StatementGGWGarfield54 min
Jun 8, 5:25 PM MDTSpecial Weather StatementGGWMcCone50 min

Nearby

Severe Thunderstorm Warnings in Montana, 2018Every severe thunderstorm warning in 2018

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.