A line of thunderstorms produced large hail over southern portions of the Bitterroot National Forest on July 3rd.
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The episode as NWS MSO wrote it up.
A line of thunderstorms produced large hail over southern portions of the Bitterroot National Forest on July 3rd.
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 Missoula, MT wrote its last area forecast discussion before the first event at Jul 1, 1:44 AM PST, 3 hours 31 minutes earlier.
Area Forecast Discussion National Weather Service Missoula MT 344 AM MDT Mon Jul 1 2019 .DISCUSSION...Our short lived ridge of high pressure will weaken overnight Monday as a trough off the west coast strengthens and moves east. What does this mean for barbecue plans? Expect afternoon showers and thunderstorms each day through the 4th. Currently, forecast models are not in agreement on timing of individual features. However, they have been very consistent for a few days in showing that a midlevel low will develop and push through western Montana and central Idaho between the 3rd and 4th. Overnight Wednesday is looking interesting as it is expected to be very unstable, bringing a decent chance for showers with thunder mixed in. In addition, fireworks on the 4th may feature showers across Western Montana. Temperatures will be warmest on Monday with low to mid 80's in Western Montana, while lowest elevations of Idaho will once again near 90. By Wednesday and Thursday, expect temperatures to cool slightly to a very pleasant mid 70's in Western Montana and low 80's near Riggins. It looks as though temperatures will slowly warm late this week and into the weekend. However, as western Montana and central Idaho remain under southwest flow aloft, the potential for showers and thunderstorms will continue. && .AVIATION... A few showers and thunderstorms are moving from KMSO towards the north and east currently. Expect these showers to pass and the possibility of patchy fog to develop through 01/1300z. By afternoon the possibility of showers and thunderstorms will once again be present for KMSO, KSMN, and KBTM. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. &&
The Missoula radar (KMSX), 155 km away, was scanning. The volume nearest the first event began at 13:12 UTC.
1 hail. Local standard time, as filed.
The Spot Mountain Lookout in the Bitterroot National Forest reported quarter-size hail during the morning hours of July 3rd, as a line of thunderstorms moved through the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2019Every state in 2019This day in weather historyWarnings in Idaho, July 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: 833762.