Alert archive / Montana / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 26, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 9, 2018, 6:35 PM MDT for Chouteau County, Fergus County, Judith Basin County, Montana. It was in force for 40 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 9, 2018, 6:35 PM MDT (00:35 UTC)
- Expired
- Jun 9, 2018, 7:15 PM MDT
- In force
- 40 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Chouteau County, MT, Fergus County, MT, Judith Basin County, MT
The radar
The Great Falls radar (KTFX), 106 km from the middle of the area, began a volume at 00:38 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 9, 1:46 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 0.6 hours before the alert went out and 48 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.
- Mixed-layer CAPE
- 2 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 4511 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 9, 6:25 PM MDT, 10 minutes earlier.
Area forecast discussion, Jun 9, 6:25 PM MDT, 10 minutes before
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Special weather statement, Jun 9, 3:58 PM MDT, 2 hours 37 minutes before
Special Weather Statement National Weather Service Great Falls MT 358 PM MDT SAT JUN 9 2018 MTZ009-046-048-092230- Southern Rocky Mountain Front-Northern Rocky Mountain Front-Eastern Pondera- 358 PM MDT SAT JUN 9 2018 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL PONDERA AND NORTH CENTRAL TETON COUNTIES... At 357 PM MDT, a strong thunderstorm was located 14 miles southwest of Valier, or 22 miles west of Conrad, moving northeast at 40 mph. Wind gusts up to 50 mph and pea size hail are possible with this storm. Locations impacted include... Valier, Pendroy and Dupuyer. This includes the following highways... Interstate 15 between mile markers 345 and 348. Highway 89 between mile markers 59 and 79. 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. 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 4828 11188 4798 11240 4813 11266 4849 11225 TIME...MOT...LOC 2157Z 221DEG 33KT 4813 11244 Coulston
Special weather statement, Jun 9, 4:09 PM MDT, 2 hours 26 minutes before
Special Weather Statement National Weather Service Great Falls MT 409 PM MDT SAT JUN 9 2018 MTZ010-044-092230- Eastern Glacier-Toole- 409 PM MDT SAT JUN 9 2018 ...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN GLACIER AND NORTHWESTERN TOOLE COUNTIES... At 409 PM MDT, radar indicated strong thunderstorms were located along a line extending from 23 miles northwest of Cut Bank to near Kevin. Movement was northeast at 50 mph. Wind gusts up to 50 mph, brief heavy rain, and pea size hail are possible with these storms. Locations impacted include... Sunburst, Kevin, Sweet Grass, Oilmont and Santa Rita. This includes Interstate 15 between mile markers 378 and 397. 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 4900 11151 4865 11195 4885 11278 4900 11268 TIME...MOT...LOC 2209Z 214DEG 43KT 4894 11259 4881 11196 Coulston
Special weather statement, Jun 9, 4:29 PM MDT, 2 hours 6 minutes before
Special Weather Statement
National Weather Service Great Falls MT
429 PM MDT SAT JUN 9 2018
MTZ044-092245-
Toole MT-
429 PM MDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN TOOLE COUNTY UNTIL
445 PM MDT...
At 429 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Sunburst, or 21 miles northeast of Cut Bank, moving
northeast at 35 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Sweet Grass.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
A Severe Thunderstorm Watch remains in effect until 900 PM MDT for
north central Montana.
LAT...LON 4900 11181 4888 11195 4891 11211 4894 11216
4900 11215
TIME...MOT...LOC 2229Z 205DEG 32KT 4890 11207
KJSpecial weather statement, Jun 9, 4:51 PM MDT, 1 hour 44 minutes before
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</html>Special weather statement, Jun 9, 5:10 PM MDT, 1 hour 25 minutes before
Special Weather Statement National Weather Service Great Falls MT 510 PM MDT SAT JUN 9 2018 MTZ012-050-054-092345- Cascade-Judith Basin-Meagher- 510 PM MDT SAT JUN 9 2018 ...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL MEAGHER...WEST CENTRAL JUDITH BASIN AND SOUTHEASTERN CASCADE COUNTIES... At 510 PM MDT, a strong thunderstorm was located 16 miles north of White Sulphur Springs, moving north at 45 mph. Wind gusts up to 50 mph and dime size hail are possible with this storm. Locations impacted include... Neihart and Monarch. This includes Highway 89 between mile markers 10 and 20, and between mile markers 33 and 59. LAT...LON 4669 11080 4671 11100 4720 11097 4715 11049 TIME...MOT...LOC 2310Z 191DEG 39KT 4678 11088 KJ
Special weather statement, Jun 9, 5:53 PM MDT, 42 minutes before
Special Weather Statement
National Weather Service Great Falls MT
553 PM MDT SAT JUN 9 2018
MTZ012-050-100030-
Cascade MT-Judith Basin MT-
553 PM MDT SAT JUN 9 2018
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MEAGHER...WESTERN
JUDITH BASIN AND SOUTHEASTERN CASCADE COUNTIES UNTIL 630 PM MDT...
At 552 PM MDT, Doppler radar was tracking a strong thunderstorm 23
miles northeast of White Sulphur Springs, moving northeast at 55 mph.
Half inch hail and wind gusts of 50 to 55 mph will be possible with
this storm.
Locations impacted include...
Stanford, Geyser and Windham.
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.
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 900 PM MDT for
central Montana.
LAT...LON 4671 11050 4674 11056 4677 11056 4677 11062
4682 11065 4684 11070 4684 11072 4685 11075
4688 11076 4729 11051 4711 11001
TIME...MOT...LOC 2352Z 204DEG 46KT 4682 11061
PNThe office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 6:36 PM MDT | Special Weather Statement | TFX | Hill | 24 min |
| Jun 9, 7:08 PM MDT | Special Weather Statement | TFX | Liberty | 37 min |
| Jun 9, 7:10 PM MDT | Special Weather Statement | TFX | Hill | 35 min |
| Jun 9, 7:30 PM MDT | Severe Thunderstorm Warning | TFX | Fergus, Judith Basin | 30 min |
| Jun 9, 7:33 PM MDT | Special Weather Statement | TFX | Chouteau | 27 min |
| Jun 9, 7:57 PM MDT | Special Weather Statement | TFX | Hill | 33 min |
| Jun 9, 8:25 PM MDT | Special Weather Statement | TFX | Fergus | 50 min |
| Jun 9, 8:31 PM MDT | Special Weather Statement | TFX | Hill | 29 min |
| Jun 9, 9:16 PM MDT | Special Weather Statement | TFX | Fergus | 29 min |
| Jun 9, 9:45 PM MDT | Special Weather Statement | TFX | 30 min | |
| Jun 9, 10:47 PM MDT | Severe Thunderstorm Warning | TFX | Blaine | 43 min |
| Jun 9, 11:34 PM MDT | Flash Flood Warning | TFX | Blaine | 6 hr |
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.