Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 20, NWS Billings, MT

May 23, 2018Rosebud County, Montana

NWS Billings, MT issued this severe thunderstorm warning at May 23, 2018, 4:03 PM MDT for Rosebud County, Montana. It was in force for 57 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: May 23, 2018, 4:03 PM MDT (22:03 UTC)
Expired: May 23, 2018, 5:00 PM MDT
In force: 57 min
Issued by: NWS Billings, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Rosebud County, MT

The radar

The Billings radar (KBLX), 151 km from the middle of the area, began a volume at 22:03 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

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 10.1 hours before the alert went out and 221 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1678 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 57 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 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 May 23, 3:28 PM MDT, 35 minutes earlier.

Area forecast discussion, May 23, 3:28 PM MDT, 35 minutes before

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Hazardous weather outlook, May 23, 3:17 AM MDT, 12 hours 46 minutes before

Hazardous Weather Outlook
National Weather Service Billings MT
317 AM MDT Wed May 23 2018

MTZ030>041-056>058-064>068-WYZ098-099-231030-
Treasure-Northern Rosebud-Custer-Fallon-Northern Stillwater-
Yellowstone-Powder River-Carter-Southern Big Horn-Eastern Carbon-
Northern Park-Northern Sweet Grass-Red Lodge Foothills-
Northern Big Horn-Southern Rosebud-Paradise Valley-Livingston Area-
Beartooth Foothills-Absaroka/Beartooth Mountains-Crazy Mountains-
Northeast Bighorn Mountains-Sheridan Foothills-
317 AM MDT Wed May 23 2018

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

* WHAT...Showers and thunderstorms, with potential for heavy
  rainfall and a few severe thunderstorms.

* WHERE...Southern Montana and northern Wyoming.

* WHEN...Today.

* ADDITIONAL DETAILS...A few severe thunderstorms capable of
  producing large hail and strong winds are possible from Hysham to
  Lame Deer eastward this afternoon and evening.

* ADDITIONAL HAZARD CONCERNS...Showers and thunderstorms will
  produce areas of heavy rainfall. Some rivers and streams could
  see aggressive rises from this rainfall. Localized low land
  flooding is possible as well.

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

Special weather statement, May 23, 1:25 PM MDT, 2 hours 38 minutes before

Special Weather Statement
National Weather Service Billings MT
125 PM MDT WED MAY 23 2018

MTZ029-035-232015-
Yellowstone MT-Musselshell MT-
125 PM MDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY...

At 123 PM MDT, trained weather spotters reported a strong
thunderstorm 9 miles north of Billings, moving north at 15 mph.

Small hail and winds in excess of 40 mph are possible with this
storm. Brief funnel clouds have been reported with this storm.

Locations impacted include...
Mainly rural areas of northern Yellowstone County.

This advisory does not include the city of Billings.

LAT...LON 4582 10833 4582 10866 4619 10877 4619 10822
TIME...MOT...LOC 1923Z 174DEG 15KT 4592 10857

Palmquist

Local storm report, May 23, 2:13 PM MDT, 1 hour 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
213 PM MDT WED MAY 23 2018

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

0117 PM     FUNNEL CLOUD     2 NE BILLINGS           45.82N 108.51W
05/23/2018                   YELLOWSTONE        MT   PUBLIC

&&

VLS

Special weather statement, May 23, 2:52 PM MDT, 1 hour 11 minutes before

Special Weather Statement
National Weather Service Billings MT
252 PM MDT WED MAY 23 2018

MTZ031-232130-
Northern Rosebud MT-
252 PM MDT WED MAY 23 2018

...SIGNIFICANT WEATHER ADVISORY...

At 251 PM MDT, Doppler radar was tracking a strong thunderstorm near
Forsyth, moving north at 30 mph.

Dime size hail and wind gusts up to 50 mph are possible with this
storm.

Locations impacted include...
Forsyth, Rosebud and Cartersville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 4586 10670 4614 10692 4665 10674 4648 10627
TIME...MOT...LOC 2051Z 199DEG 28KT 4619 10677

Borsum

Special weather statement, May 23, 3:31 PM MDT, 32 minutes before

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Special weather statement, May 23, 3:35 PM MDT, 28 minutes before

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Special weather statement, May 23, 3:58 PM MDT, 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 6:07 PM MDT	Special Weather Statement	BYZ	Yellowstone	38 min
May 22, 6:07 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	38 min
May 22, 6:18 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	43 min
May 22, 7:49 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	41 min
May 22, 8:43 PM MDT	Areal Flood Advisory	BYZ	Yellowstone	3 hr
May 22, 8:51 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon	54 min
May 22, 9:13 PM MDT	Areal Flood Advisory	BYZ	Carbon, Stillwater	3 hr
May 22, 10:31 PM MDT	Flash Flood Warning	BYZ	Carbon	6 hr
May 23, 5:00 AM MDT	Areal Flood Advisory	BYZ	Carbon, Stillwater, Yellowstone	7 hr
May 23, 7:55 AM MDT	Areal Flood Warning	BYZ	Carbon, Stillwater, Sweet Grass	6 hr
May 23, 11:09 AM MDT	River Flood Warning	BYZ	Park	5 days
May 23, 11:45 AM MDT	River Flood Warning	BYZ	Sweet Grass	5 days
May 23, 12:14 PM MDT	River Flood Watch	BYZ	Stillwater, Yellowstone	3 days
May 23, 12:44 PM MDT	Areal Flood Warning	BYZ	Carbon, Stillwater, Sweet Grass	6 hr
May 23, 1:25 PM MDT	Special Weather Statement	BYZ	Yellowstone	50 min
May 23, 2:52 PM MDT	Special Weather Statement	BYZ	Rosebud	38 min
May 23, 3:31 PM MDT	Special Weather Statement	BYZ	Yellowstone	44 min
May 23, 3:35 PM MDT	Special Weather Statement	BYZ	Rosebud	40 min
May 23, 3:45 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	60 min
May 23, 3:49 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	56 min
May 23, 3:58 PM MDT	Special Weather Statement	BYZ	Yellowstone	47 min
May 23, 4:12 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	48 min
May 23, 4:29 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	61 min
May 23, 4:42 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	63 min
May 23, 4:52 PM MDT	Special Weather Statement	BYZ	Custer	38 min
May 23, 5:06 PM MDT	Special Weather Statement	BYZ	Powder River	39 min
May 23, 5:18 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	57 min
May 23, 5:31 PM MDT	Special Weather Statement	BYZ	Treasure	44 min
May 23, 5:54 PM MDT	Special Weather Statement	BYZ	Carter	51 min

Nearby

Severe Thunderstorm Warnings in Montana, 2018 Every 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.