Montana, 2018

Funnel Clouds in Montana, June 29, 2018

June 29, 2018 · NWS GGW · 2 events in 2 counties and zones

Behind the cold front from the day before, the elevated dynamics of the recent active storm system had some lingering effects into the late morning hours of the 29th, as a few cold air funnels were spotted in Phillips and Sheridan Counties.

Where it happened

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  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS GGW wrote it up.

Behind the cold front from the day before, the elevated dynamics of the recent active storm system had some lingering effects into the late morning hours of the 29th, as a few cold air funnels were spotted in Phillips and Sheridan Counties.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Jun 29, 8:04 AM MST, 2 hours 16 minutes earlier.

Area forecast discussion, Jun 29, 8:04 AM MST, 2 hours 16 minutes before
Area Forecast Discussion
National Weather Service Glasgow MT
904 AM MDT Fri Jun 29 2018

.DISCUSSION...
Updated mainly the pops/weather this morning to account for the
showers moving northeast through the north-central areas of the
CWA. Instability will be elevated today in most places as lower
layers are cool and to remain so into the afternoon hours.

Going high temp forecast cool, with temps in the 60s to low 70s
expected. TFJ

Previous Discussion...
Cold front and stronger thunderstorms have moved into North
Dakota early this morning. Upper trof will slowly drift east
through the weekend, although broadly cyclonic flow will remain
until early next week when an upper low drops into the Pacific
Northwest from the Gulf of Alaska.

Cooler and unsettle weather is expected for the next few days with
the upper trof overhead. Showers and thunderstorms will be lifting
north as the flow flattens out by Sunday.

Drier and warmer weather with temperatures rising into the 80s
returns for next week. While upper low settles over the Pacific
Northwest, ridge will build toward the Great Lakes. Southwest flow
will pump warm air into the northern plains, but moisture off the
Pacific will mostly be into western Montana. Ebert

&&

.AVIATION...
Mostly VFR conditions are expected today, although brief MVFR
ceilings are possible with showers moving across the region. A few
thunderstorms could occur, and drops in visibility are possible
with heavier rain.

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

weather.gov/glasgow

The radar

The Glasgow radar (KGGW), 112 km away, was scanning. The volume nearest the first event began at 17:22 UTC.

Open the radar archive at this moment

Event by event

2 funnel cloud. Local standard time, as filed.

Funnel Cloud, Phillips

When
June 29, 10:20 AM MST
Where
Phillips County, 19.01 mi SSW of Sun Prairie
Reported by
Public
Coordinates
47.640, -107.870

Public reported a cold air funnel.

Funnel Cloud, Sheridan

When
June 29, 10:30 AM MST
Where
Sheridan County, 0.45 mi W of Westby
Reported by
Public
Coordinates
48.870, -104.060

Public reported multiple cold air funnels.

What these are

Funnel Cloud
A rotating column of cloud extending from a thunderstorm that did not reach the ground.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 2018Every state in 2018This day in weather historyWarnings in Montana, June 2018

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 766637, 766638.