Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 82, NWS Billings, MT

June 7, 2018Carter County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 7, 2018, 8:12 PM MDT for Carter County, Montana. It was in force for 63 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, 8:12 PM MDT (02:12 UTC)
Expired
Jun 7, 2018, 9:15 PM MDT
In force
63 min
Issued by
NWS Billings, MT
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Carter County, MT

The radar

The Rapid City radar (KUDX), 205 km from the middle of the area, began a volume at 02:15 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, 3:49 PM MDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 2.2 hours before the alert went out and 207 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, Rapid City, SD at 00:00Z on 2018-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2036 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, Rapid City, SD at 00:00Z on 2018-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 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
2036 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1544 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.6

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 Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 7, 7:53 PM MDT, 19 minutes earlier.

Area forecast discussion, Jun 7, 7:53 PM MDT, 19 minutes before
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Hazardous weather outlook, Jun 7, 2:32 PM MDT, 5 hours 40 minutes before
Hazardous Weather Outlook
National Weather Service Billings MT
232 PM MDT Thu Jun 7 2018

MTZ028>042-056>058-063>068-WYZ098-099-080300-
Southern Wheatland-Musselshell-Treasure-Northern Rosebud-Custer-
Fallon-Northern Stillwater-Yellowstone-Powder River-Carter-
Southern Big Horn-Eastern Carbon-Northern Park-
Northern Sweet Grass-Golden Valley-Red Lodge Foothills-
Northern Big Horn-Southern Rosebud-Judith Gap-Paradise Valley-
Livingston Area-Beartooth Foothills-Absaroka/Beartooth Mountains-
Crazy Mountains-Northeast Bighorn Mountains-Sheridan Foothills-
232 PM MDT Thu Jun 7 2018

This Hazardous Weather Outlook is for portions of central
Montana...south central Montana...southeast Montana and north
central Wyoming.

* WHAT...Strong to severe thunderstorms possible.

* WHERE...Southern Montana and north-central Wyoming.

* WHEN...This afternoon and evening.

* ADDITIONAL DETAILS...The main hazards are large hail and damaging
  winds. Also these storms could produce heavy rainfall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Hazardous Weather Outlook is issued when hazardous weather could
impact the region within the next week. Be sure to stay tuned for
future updates as locations, timing, and impacts could change.
Begin preparations to mitigate any impacts that could result from
the hazardous weather.

&&

In the hours before

Local storm report, Jun 7, 6:47 PM MDT, 1 hour 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
647 PM MDT THU JUN 07 2018

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

0510 PM     TSTM WND GST     3 SSE CROW AGENCY       45.57N 107.44W
06/07/2018  M65.00 MPH       BIG HORN           MT   MESONET

0632 PM     HAIL             7 SSW ASHLAND           45.50N 106.31W
06/07/2018  M0.25 INCH       ROSEBUD            MT   TRAINED SPOTTER

0637 PM     TSTM WND GST     FORSYTH                 46.26N 106.69W
06/07/2018  M65.00 MPH       ROSEBUD            MT   TRAINED SPOTTER

            POWER LINES AND TREES DOWN

0637 PM     HAIL             FORSYTH                 46.27N 106.65W
06/07/2018  M0.75 INCH       ROSEBUD            MT   TRAINED SPOTTER

            POWER OUTAGE; SMALL COTTONWOOD BRANCHES DOWN; HEAVY
            RAINFALL

0637 PM     TSTM WND DMG     FORSYTH                 46.26N 106.69W
06/07/2018                   ROSEBUD            MT   TRAINED SPOTTER

            POWER LINES AND TREES DOWN

&&

ARTHUR
Special weather statement, Jun 7, 7:08 PM MDT, 1 hour 4 minutes before
Special Weather Statement
National Weather Service Billings MT
708 PM MDT THU JUN 7 2018

MTZ032-080130-
Custer MT-
708 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY...

At 707 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Volborg, or 31 miles south of Miles City, moving east
at 35 mph. Wind gusts up to 50 mph, small hail and very heavy
rainfall, are all possible with this storm.

Locations impacted include...
Volborg.

A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
southeastern Montana.

LAT...LON 4579 10589 4616 10590 4613 10494 4579 10494
TIME...MOT...LOC 0107Z 259DEG 29KT 4597 10562

TWH
Special weather statement, Jun 7, 7:10 PM MDT, 1 hour 2 minutes before
Special Weather Statement
National Weather Service Billings MT
710 PM MDT THU JUN 7 2018

MTZ036-037-080230-
Powder River MT-Carter MT-
710 PM MDT THU JUN 7 2018

...SIGNIFICANT WEATHER ADVISORY...

At 707 PM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Volborg to 17 miles north of Recluse.
Movement was east at 35 mph.

Wind gusts of 45 to 55 mph along with dime size hail and heavy rain
are possible with these storms.

Another storm about 15 miles east of Broadus was nearly stationary
and is capable of producing nickel size hail and very heavy rain.

Locations impacted include...
Broadus, Biddle, Olive, Sonnette, Hammond, Moorhead, Powderville,
Boyes, Belle Creek and Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Severe Thunderstorm Watch remains in effect until 1100 PM MDT for
southeastern Montana.

LAT...LON 4500 10590 4579 10583 4579 10476 4500 10478
TIME...MOT...LOC 0107Z 262DEG 29KT 4581 10576 4498 10584

Lester
Local storm report, Jun 7, 7:24 PM MDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
724 PM MDT THU JUN 07 2018

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

0619 PM     TSTM WND DMG     ROSEBUD                 46.18N 106.48W
06/07/2018                   ROSEBUD            MT   TRAINED SPOTTER

            COTTONWOOD TREE DOWN BLOCKING SOUTH LANE OF HWY 447 SOUTH
            OF ROSEBUD. REPORTED BY STORM CHASERS.

0625 PM     TSTM WND GST     ROSEBUD                 46.27N 106.45W
06/07/2018  M65.00 MPH       ROSEBUD            MT   TRAINED SPOTTER

            BROKEN HIGHWAY SIGNS ON I94 REPORTED BY STORM CHASERS.

0630 PM     TSTM WND GST     2 NNW FORSYTH           46.30N 106.70W
06/07/2018  M56.00 MPH       ROSEBUD            MT   MESONET

0639 PM     TSTM WND GST     2 NNW FORSYTH           46.30N 106.70W
06/07/2018  M56.00 MPH       ROSEBUD            MT   MESONET

0641 PM     TSTM WND GST     2 NNW FORSYTH           46.30N 106.70W
06/07/2018  M51.00 MPH       ROSEBUD            MT   MESONET

0702 PM     TSTM WND GST     3 WNW MILES CITY        46.43N 105.89W
06/07/2018  M61.00 MPH       CUSTER             MT   ASOS

&&

ARTHUR
Special weather statement, Jun 7, 7:56 PM MDT, 16 minutes before
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Local storm report, Jun 7, 8:00 PM MDT, 12 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 6:14 PM MDTSevere Thunderstorm WarningBYZBig Horn, Powder River, Rosebud61 min
Jun 7, 6:21 PM MDTSpecial Weather StatementBYZCarter24 min
Jun 7, 6:26 PM MDTSevere Thunderstorm WarningBYZCuster34 min
Jun 7, 6:41 PM MDTSevere Thunderstorm WarningBYZCuster, Rosebud49 min
Jun 7, 6:46 PM MDTSpecial Weather StatementBYZCarter29 min
Jun 7, 7:00 PM MDTSevere Thunderstorm WarningBYZCuster60 min
Jun 7, 7:08 PM MDTSpecial Weather StatementBYZCuster22 min
Jun 7, 7:10 PM MDTSpecial Weather StatementBYZPowder River80 min
Jun 7, 7:30 PM MDTFlash Flood WarningBYZCuster3 hr
Jun 7, 7:33 PM MDTSevere Thunderstorm WarningBYZCarter42 min
Jun 7, 7:56 PM MDTSpecial Weather StatementBYZFallon64 min
Jun 7, 9:12 PM MDTSpecial Weather StatementBYZGolden Valley48 min
Jun 7, 9:24 PM MDTSpecial Weather StatementBYZGolden Valley36 min
Jun 7, 10:08 PM MDTSpecial Weather StatementBYZMusselshell52 min
Jun 7, 10:29 PM MDTSpecial Weather StatementBYZStillwater31 min
Jun 7, 11:10 PM MDTSpecial Weather StatementBYZYellowstone35 min
Jun 8, 4:00 PM MDTSpecial Weather StatementBYZStillwater45 min
Jun 8, 5:14 PM MDTSpecial Weather StatementBYZBig Horn31 min
Jun 8, 5:20 PM MDTSpecial Weather StatementBYZCarter40 min
Jun 8, 5:50 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud22 min
Jun 7, 6:01 PM MDTSpecial Weather StatementBYZSheridan59 min
Jun 7, 6:27 PM MDTSevere Thunderstorm WarningBYZSheridan34 min
Jun 8, 4:38 PM MDTSpecial Weather StatementBYZSheridan22 min
Jun 8, 5:41 PM MDTSpecial Weather StatementBYZSheridan49 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.