A strong Pacific cold front traverses the CWA through the night of 6 Jun 2019, exiting to the southeast by daybreak on 7 Jun 2019. Scattered showers and thunderstorms occur ahead of this front through the evening with some of the storms becoming severe.
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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 strong Pacific cold front traverses the CWA through the night of 6 Jun 2019, exiting to the southeast by daybreak on 7 Jun 2019. Scattered showers and thunderstorms occur ahead of this front through the evening with some of the storms becoming severe.
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 7, 10:12 AM MST, 2 hours 6 minutes earlier.
Area Forecast Discussion National Weather Service Great Falls MT 1112 AM MDT Fri Jun 7 2019 UPDATED AVIATION .UPDATE... Made several changes to the forecast for the rest of today. First, increased POPs across southwest MT and essentially the eastern half of central MT using a blend of our previous POPs and those from the latest runs of the NAM12 and NBMv3.1. Those models are in good agreement that persistent rain showers and mountain snow showers will occur in the aforementioned areas as a 700 mb cold front moves slowly eastward. Also freshened QPF and mountain snowfall using a blend of our previous QPF and the latest QPF from NBMv3.2. This resulted in little change to rainfall and mountain snowfall. Lastly, high temperatures were decreased by several degrees for most southwest MT valleys using SuperBlend model guidance. Observations indicate there has been a slight warm bias to our forecast. Expect abundant cloud cover and periods of precipitation to contribute to limited daytime heating in the aforementioned areas. Below-normal temperatures are expected across our entire CWA today as low-level cold air advection occurs behind the surface cold front that passed through recently. - Jaszka && .SYNOPSIS... Cool and unsettled conditions will persist through Saturday as an upper level low pressure system moves across the Northern Rockies and Montana. Rain and high elevation snow shower coverage will be greatest over southwest Montana today with scattered rain and mountain snow showers across most of north-central and southwest Montana Saturday. Drier conditions develop Sunday through much of next week with temperatures returning to seasonal averages by Monday. && .AVIATION... Updated 1112 AM MDT Fri Jun 7 2019 (18Z/Fri TAFs) Mainly VFR and periods of mountain obscuration amidst abundant low- to mid-level cloud cover occur during the next 24-hours. A mid- to upper-level trough axis extends through eastern WA and central OR at time of writing. This trough axis should reach the central third of MT and south-central ID by 18Z/Sat. Multiple disturbances embedded within the trough affect our area, resulting in isolated to scattered rain showers and mountain snow showers. Showers will be most prevalent in southwest MT, the eastern-half of central MT, and along the Continental Divide. Brief MVFR CIGS/VSBY may accompany these showers. Breezy west-southwest to west-northwest surface winds are expected, especially in north-central MT. - Jaszka && .PREV DISCUSSION... /ISSUED 328 AM MDT Fri Jun 7 2019/ Today through Saturday Night... Upper level trough extending from BC south through the Pacific NW will continue to move east into the Northern Rockies today with its axis traversing MT Saturday. While the initial surface cold front pushed through the region overnight, flow aloft from the SW still contains several embedded disturbances for continued showers today across mainly SW and central MT. Greatest coverage of showers and possibly a few weak afternoon thunderstorms will be east of a line from roughly Dillon to White Sulphur Springs, as a shortwave lifts NE along a stalled mid-level frontal region along the MT/ID border. Breezy to windy conditions will continue over N-central MT today in the wake of a surface low moving east across Canada. Tonight through Saturday, as the upper trough axis moves into western and central MT, shortwave energy moving east with the trough axis and moisture circulating southward from AB will bring another increase in showers before drier conditions move in from the NW Saturday night. Temperatures will remain about 10-15 degrees below seasonal averages through Saturday with afternoon high temperatures at lower elevations in the 50s to low 60s today and mainly in the 50s on Saturday. Snow levels look to get as low as 5000 feet near Glacier Park and 6500 feet over SW MT through Saturday with snow possibly accumulating at the highest elevations in periods of precipitation. With temperatures near or above freezing at and below pass levels and intermittent nature of precipitation, little impact is expected. Hoenisch Sunday through Friday...no major forecast concerns throughout the timeframe outside of some breezy afternoon winds Sunday, and then precipitation chances Sunday/Monday/Thursday/Friday. H500 ridge will begin to build into the Northern Rockies and Northern High Plains by Sunday morning as the trough/closed low responsible for the cool and unsettled weekend lifts northeast towards the Hudson Bay. Lingering moisture over North Central Montana combined with northwest flow aloft and diurnal heating may allow for isolated to scattered showers and storms to develop during the late morning and persist through the evening hours Sunday, most notably over the mountains. In addition to the chance for some showers/storms on Sunday, gusty westerly surface winds of 20-30mph are expected over the plains of North Central Montana given unidirectional low through mid-level flow, steep afternoon lapse rates, and H700 winds of 15-30kts. The aforementioned ridge will continue to slide and build east through the day on Monday, but a fast moving wave rounding the the axis of the ridge over Southern Canada will dive southeast and across the region Monday afternoon/evening. This fast moving wave will help to spark off isolated to scattered showers across North Central and portions of Southwest Montana Monday afternoon/evening, with the best focus for precipitation once again being over the mountains. Temperatures will begin to moderate Monday and Tuesday, with highs climbing back above normal by Wednesday and remaining above normal through the day on Friday. Quiet conditions are currently expected on Wednesday as the axis of the ridge moves overhead, with chances for precipitation returning to Southwest and Central Montana Thursday afternoon and into the day on Friday as the ridge is broken down by a shortwave dropping southeast from the Gulf of Alaska and across the Pacific Northwest. - Moldan && .PRELIMINARY POINT TEMPS/POPS... GTF 59 39 56 40 / 30 10 60 20 CTB 59 36 56 38 / 20 50 40 10 HLN 57 38 57 38 / 50 20 60 20 BZN 53 36 55 33 / 100 80 60 40 WEY 57 28 47 21 / 80 80 60 40 DLN 51 33 52 30 / 100 80 40 20 HVR 66 38 60 40 / 20 10 20 10 LWT 56 37 54 37 / 80 40 70 30 && .TFX WATCHES/WARNINGS/ADVISORIES... None. && http://www.weather.gov/greatfalls
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
759 AM MDT FRI JUN 7 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0658 PM TSTM WND GST 5 NNE FORESTGROVE 47.06N 109.05W
06/06/2019 M64 MPH FERGUS MT MESONET
DELAYED REPORT. CONVECTIVE GUST FROM RAIN
SHOWER.
&&The Glasgow radar (KGGW), 161 km away, was scanning. The volume nearest the first event began at 19:21 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gust measured at Mesonet station fblm8 Fort Belknap RAWS.
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: 836467.