A strong upper low over Idaho combined with a surface low over central Wyoming brought a late season heavy snow event to the entire Billings forecast area. |Snowfall amounts of 6 to 10 inches were common across the entire forecast area.
Every event with a place to put it; 16 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 BYZ wrote it up.
A strong upper low over Idaho combined with a surface low over central Wyoming brought a late season heavy snow event to the entire Billings forecast area. Tight surface pressure gradients associated with the surface low resulted in gusty northwest winds and considerable blowing and drifting snow across the east and southeast portions of the area.|Snowfall amounts of 6 to 10 inches were common across the entire forecast area.
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 Billings, MT wrote its last area forecast discussion before the first event at Apr 1, 2:48 PM MST, 2 hours 12 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
21 winter storm. Local standard time, as filed.
The east side of the Crazies received over a foot of new snow.
Fisher Creek and Cole Creek received 12+ inches of new snow.
Mystic Lake received 19 inches of snow while McLeod received 12 inches.
Snowfall of 5 to 10 inches was reported across the area.
Snowfall of 6 to 9 inches was reported across the area.
Snowfall of 5 to 10 inches was reported across the area.
Snowfall of 4 inches was reported. Highway 191 was closed through Judith Gap due to blizzard conditions.
Snowfall of 9 inches was reported. Highways 87 and 191 were closed due to bad road conditions.
Snowfall of 8 to 10 inches was reported across the area.
Two Dot received 7 inches of snow.
Snowfall of 6 inches was reported south of Livingston.
Snowfall of 5 to 10 inches was reported across the area.
Broadview received 7 inches of snow and Laurel received 8 inches.
Snowfall of 9 inches was reported across the area.
Snowfall of 5 to 8 inches was reported across the area.
Snowfall of 6 inches was reported in Hardin and Busby.
Snowfall of 6 to 8 inches was reported across the area.
Snowfall of 6 to 9 inches was reported.
Both lanes of I-90 were blocked by numerous accidents around and north of Aberdeen Hill. Northern Sheridan County in Wyoming received 4 to 8 inches of snow.
Chains were required over Lame Deer Divide.
Snowfall of 6 inches along with severe driving conditions along Highway 212 were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2018Every state in 2018This day in weather historyWarnings in Montana, April 2018
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: 746444, 746445, 746436, 746437, 746439, 746440, 746431, 746432, 746434, 746435, 746438, 746441, 746433, 746442, 746443, 746386, 746389, 746420, 746387, 746381, 746388.