Category D2 drought conditions for northeast Montana remained unchanged through the month of April.
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.
Category D2 drought conditions for northeast Montana remained unchanged through the month of April.
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 Mar 31, 12:40 PM MST, 11 hours 20 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Glasgow MT 140 PM MDT Tue Mar 31 2026 .KEY MESSAGES... - A Lake Wind Advisory is in effect for gusty winds from 10 PM tonight through 10 AM Wednesday. - A surface trough will bring rain and snow chances from 9 PM tonight through about 6 AM Thursday. Light snow accumulation is expected south of the Missouri River. - Another organized snow storm is expected to occur between Thursday and Friday night before a ridge builds back in. && .DISCUSSION... WEATHER PATTERN OVERVIEW: An upper trough over the region is keeping temperatures below normal today, and a surface trough will push through beneath the upper low after 9 PM tonight. This will bring an opportunity for rain and snow showers, with most amounts remaining below one inch south of the Missouri River through noon Wednesday. The highest amounts are expected in the southeast part of the area. Strong east southeast winds are expected to pick up tonight and continue through most of the week. After 6 PM Wednesday, snow showers are expected to linger, with light accumulations (less than 0.5 inches) possible through 6 AM Thursday. After 6 AM Thursday, a large shortwave trough is expected to move in. There is high agreement between the EMCWF and GFS ensemble on the arrival time of this disturbance, but there is moderate to high uncertainty on exactly where it will set up. Recent trends have been to push the most precipitation toward southern Montana and northern Wyoming, but there still remains a high possibility of northeast Montana receiving anywhere between 0.05 to 0.25 inches of precipitation, and up to 5 inches (mainly in the Little Rockies area) of snow. There is agreement between the GFS and ECMWF ensemble that an upper ridge will move in for the weekend behind this upper trough, so temperatures are expected to climb back to around average. FORECAST CONFIDENCE & DEVIATIONS: Main deviations were to increase PoPs through 6 AM Thursday with manual edits, GFS1hr and base NBM as the main models. Used a mix of NBM and NBM 90 to increase winds based on HREF guidance through around 9 AM Wednesday. There is high confidence of precipitation in the form of rain and snow occurring south of the Missouri River through 6 AM Wednesday, with low to moderate confidence north of the Missouri River. There is high confidence snowfall amounts will remain below one inch through 12 AM Thursday. There is moderate to high confidence of winds gusting to 35 mph in a few locations through 9 AM tomorrow. For Thursday into Friday, there is moderate to high confidence on the precipitation being wind driven, which has potential to reduce visibility in this period. There is low to moderate confidence in snowfall and precipitation amounts in this period, and moderate confidence a Lake Wind Advisory will be needed. There is moderate to high confidence an upper ridge will move in this weekend behind the trough. && .AVIATION... LAST UPDATE: 1900Z FLIGHT CATEGORY: VFR - MVFR DISCUSSION: Mainly high clouds will stay over the area to slowly be replaced by low to mid clouds by about 06Z. Another surface trough beneath a broad upper trough is expected to move through tonight into Wednesday. There is moderate to high confidence all TAF sites will see rain and snow chances from 06Z through at least 00Z Thursday and MVFR conditions, with scattered IFR for KSDY and KGDV from 07Z to 18Z. There is moderate confidence of KGDV and KSDY seeing accumulating snow (up to one inch). WIND: East southeast at 5 to 20 knots, with gusts to 30 knots. && .GGW WATCHES/WARNINGS/ADVISORIES... Lake Wind Advisory from 10 PM this evening to 10 AM MDT Wednesday for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone-Petroleum. && weather.gov/glasgow
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
The western side of southwest Phillips County remained in D2 drought conditions for the entire month of April.
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, April 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: 1321768.