A nearly stationary closed low located over southern Saskatchewan generates areas of rain over northeastern Montana, including portions of Blaine County. Partial clearing along the Rocky Mountain Front allows just enough heating to destabilize the atmosphere and form a band of showers with isolated thunderstorms along a line from near Cut Bank to Great Falls.
Every event with a place to put it. Tap one for its entry below.
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.
The episode as NWS TFX wrote it up.
A nearly stationary closed low located over southern Saskatchewan generates areas of rain over northeastern Montana, including portions of Blaine County. Partial clearing along the Rocky Mountain Front allows just enough heating to destabilize the atmosphere and form a band of showers with isolated thunderstorms along a line from near Cut Bank to Great Falls.
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 Great Falls, MT wrote its last area forecast discussion before the first event at Jun 22, 10:40 AM MST, 50 minutes earlier.
Area Forecast Discussion National Weather Service Great Falls MT 1140 AM MDT Sat Jun 22 2019 Aviation Section Updated. .UPDATE... Rain showers persist this morning from Little Belt Mountains, to Havre to Lewistown area. The forecast was freshened to better match observed trends, but otherwise no significant changes. && .SYNOPSIS... Upper level low over eastern Montana will move northward into Saskatchewan today with areas of rain continuing across much of the state. Temperatures will gradually warm back into the 70s with scattered showers and thunderstorms expected at times through the upcoming week. Another weather system will move into the region late next week. && .AVIATION... Updated 1140 AM MDT Sat Jun 22 2019 (22/18Z TAFs) Drier air is gradually eroding clouds from the northwest as an upper level closed low moves further away to the east of our area terminals. A mix of VFR/MVFR conditions will continue to slowly improve this afternoon, with MVFR persisting longest at KHVR/KLWT. A few mountain showers may redevelop this afternoon, and mountain obscuration will continue over most areas through the day. && .PREV DISCUSSION... /ISSUED 532 AM MDT Sat Jun 22 2019/ Upper level low currently over northeastern Montana will move northward into Canada today. However, unsettled conditions will continue to affect much of the Treasure State through the weekend. As the storm system continues to move away from the region we can expect to see the upper level pattern transition back towards a prevailing westerly flow aloft early in the week with temperatures expected to warm back up toward seasonable averages. Although the westerly flow aloft will allow somewhat drier conditions to prevail Monday and Tuesday, it appears that there could still be a slight chance to good chance for afternoon/evening showers and thunderstorms each day, especially over the mountains and along the Canadian border. Forecast models are in good agreement that another unseasonably strong upper level trough will develop along the Pacific Northwest coast by Wednesday morning. This system will set up a moist and unstable southwest flow aloft over Montana for Wednesday through Friday. Am expecting an increasing chance for scattered to numerous thunderstorms for this time frame, with some storms possibly becoming strong to severe Wednesday and Thursday afternoon/evening. This weather system is progged to weaken and move northeastward into Alberta by late Friday leaving southwest flow aloft over Montana with conditions possibly remaining somewhat unsettled into next weekend. mpj && .PRELIMINARY POINT TEMPS/POPS... GTF 66 47 70 47 / 60 30 20 10 CTB 66 46 69 46 / 50 50 20 10 HLN 69 46 72 47 / 50 20 10 0 BZN 64 41 70 43 / 60 20 20 20 WEY 57 30 62 34 / 30 20 30 10 DLN 61 39 67 42 / 40 30 0 0 HVR 66 46 73 48 / 70 20 40 40 LWT 60 43 67 44 / 70 20 50 30 && .TFX WATCHES/WARNINGS/ADVISORIES... None. && http://www.weather.gov/greatfalls
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
953 AM MDT SAT JUN 22 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0930 AM HEAVY RAIN 1 NW DANVERS 47.23N 109.72W
06/22/2019 M0.72 INCH FERGUS MT NWS EMPLOYEE
0.72 INCHES STORM TOTAL SINCE 4:30PM
YESTERDAY.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
956 AM MDT SAT JUN 22 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM HEAVY RAIN 1 NNW LEWISTOWN 47.07N 109.43W
06/22/2019 M1.01 INCH FERGUS MT TRAINED SPOTTER
1.01 INCHES STORM TOTAL RAINFALL. 0.65
INCHES SINCE MIDNIGHT.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
1139 AM MDT SAT JUN 22 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1125 AM HEAVY RAIN 6 E HAVRE 48.56N 109.54W
06/22/2019 M2.20 INCH HILL MT TRAINED SPOTTER
1.60 INCHES SINCE 1PM FRIDAY.
&&
FMKThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Report of road closure through Mission Canyon due to high water and some culvert damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2019Every state in 2019This day in weather historyWarnings in Montana, June 2019
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: 844309.