Drought conditions expanded slightly across portions of this area partway through the month.
Every event with a place to put it; 1 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 GGW wrote it up.
Drought conditions expanded slightly across portions of this area partway through the month.
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 Glasgow, MT wrote its last area forecast discussion before the first event at Apr 30, 12:15 PM MST, 11 hours 45 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Glasgow MT 115 PM MDT Thu Apr 30 2026 .KEY MESSAGES... - Warmer temperatures are set to move into the region beginning Friday, and continuing into the weekend. - Most of the shower chances this weekend will remain across western, central, and southern portions of Montana. - Unsettled weather may return early next week. && .DISCUSSION... WEATHER PATTERN OVERVIEW: Aside from a few mid level clouds, quiet weather will be in store for Friday into the upcoming weekend across NE Montana. Upper ridging will nose its way in from the west allowing large scale subsidence and warming temperatures. Mean NBM guidance continues to show support for highs into the 60s and 70s during this time. Meanwhile, the ridge will showcase some flattening late into the weekend and early next week on northwest upper flow with an eventual split flow pattern emerging as a closed low sets up over the southwestern U.S. The northern northwest flow branch over eastern Montana may allow shortwaves to traverse with occasional shower chances. FORECAST CONFIDENCE & DEVIATIONS: Winds were modestly nudged above NBM this afternoon to reflect gusty conditions expected during peak boundary layer mixing. Otherwise, NBM was very reliable in producing a high confidence forecast toward warmer temperatures and dry weather through the weekend. Confidence is lower however at larger time scales into next week on timing and placement of precipitation chances. && .AVIATION... Updated: Thursday April 30, 2026 at 1915Z. Flight Category: VFR. Discussion: Quiet weather looks to continue amid mid level cloudiness. Winds: North to northwest winds are expected this afternoon ranging 10 to 20 kts, becoming light and variable overnight. && .GGW WATCHES/WARNINGS/ADVISORIES... None. && weather.gov/glasgow
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
D2 drought conditions, already in place from the previous month, expanded slightly eastward in the third week of May to cover more of this zone in southwestern Phillips County.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2026Every state in 2026This day in weather historyWarnings in Montana, May 2026
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: 1325852.