A deep upper level low brought wraparound precipitation to the region. Warmer surface temperatures allowed for heavy rainfall with resulting ponding on major roads and intersections in the Snake River Valley, while heavy snow accumulated in elevations above 5000 feet.
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 BOI wrote it up.
A deep upper level low brought wraparound precipitation to the region. Warmer surface temperatures allowed for heavy rainfall with resulting ponding on major roads and intersections in the Snake River Valley, while heavy snow accumulated in elevations above 5000 feet.
The national radar mosaic for the moment the first event began.
7 heavy rain, 1 heavy snow. Local standard time, as filed.
The COOP observer at station MHS1, near Murphy Hot Springs, measured 6.0 inches of snow.
The mesonet station WWA01 10.7 miles southeast of Horseshoe Bend measured 1.56 inches of rain.
The mesonet station BOII 1.7 miles southeast of Boise measured 1.15 inches of heavy rain.
The mesonet station TT289 at Crestline Trail in the Boise foothills measured 1.08 inches of heavy rain.
The mesonet station at BSUI1 measured 1.32 inches of heavy rain.
The mesonet station GW0891 in Boise measured 1.09 inches of rain.
The mesonet station LLAI1 at the Boise Weather Forecast Office RAWS measured 1.13 inches of rain.
The mesonet station 1452D 2 miles east of Boise measured 1.10 inches of rain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2023Every state in 2023This day in weather historyWarnings in Idaho, March 2023
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 2026-10-01. Each event’s entry at NCEI: 1091503, 1091329, 1091497, 1091501, 1091331, 1091500, 1091498, 1091499.