S. and closed off moving across Iowa by early on January 19.
Every event with a place to put it; 11 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 FSD wrote it up.
A strong upper level wave lifted out of the southwestern U.S. and closed off moving across Iowa by early on January 19. A band of snow developed within the leading warm advection zone from northern Nebraska to northern Iowa by late afternoon on January 18, and with unstable conditions near the frontal axis, the band evolved into a more narrow zone of intense snowfall into the overnight hours. Dry air poised to the north created a sharp gradient to snowfall on the north side of the band.
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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jan 18, 4:02 PM CST, 58 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Sioux Falls SD 417 AM CST Wed Jan 18 2023 MNZ071-072-080-097-SDZ038>040-052>061-191030- Lincoln-Lyon-Murray-Pipestone-Beadle-Kingsbury-Brookings-Jerauld- Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- 417 AM CST Wed Jan 18 2023 This Hazardous Weather Outlook is for portions of southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Another round of snowfall is expected to move through the region this afternoon and tonight. Snowfall amounts may range from below 1 inch near Huron to as much as 2 to 4 inches in locations from Chamberlain and Mitchell South Dakota, to Pipestone and Tracy Minnesota. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Patchy blowing or drifting snow will remain possible in portions of southwest Minnesota Thursday. Otherwise, no hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ001>003-MNZ081-089-090-098-SDZ050-062>067-191030- Lyon-Osceola-Dickinson-Cottonwood-Nobles-Jackson-Rock-Gregory- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Lincoln- 417 AM CST Wed Jan 18 2023 This Hazardous Weather Outlook is for portions of northwest Iowa, southwest Minnesota, south central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight A winter storm will spread snow across the region today and tonight, with moderate snow accumulations from 4 to 9 inches currently expected. A sharp north-to-south gradient in snowfall amounts is likely, meaning accumulations could vary greatly over just a few miles. Falling snow may be heavy at times, possibly accumulating at a rate of an inch per hour at times, resulting in a quick degradation in travel conditions this afternoon and evening. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Patchy blowing or drifting snow will remain possible into Thursday. Otherwise, no hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ012>014-020>022-031-032-NEZ013-014-SDZ068>071-191030- Sioux-O'Brien-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida- Dixon-Dakota-Bon Homme-Yankton-Union- 417 AM CST Wed Jan 18 2023 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, northeast Nebraska, and southeast South Dakota. .DAY ONE...Today and Tonight A winter storm will spread snow across the region today and tonight. Moderate to heavy snow accumulations are expected, with amounts from 7 to 13 inches possible. Snowfall will be heavy at times, accumulating at rates of 1 to 2 inches per hour or more, resulting in a quick degradation of conditions this afternoon and this evening. Travel will be hazardous to perhaps impossible in the highest impacted areas. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Patchy blowing or drifting snow will remain possible into Thursday. Otherwise, no hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
10 winter storm, 1 winter weather. Local standard time, as filed.
Snowfall totaled 8.5 inches at Sioux Rapids and 6.5 inches at Storm Lake.
Snowfall totaled 6.3 inches at Cherokee.
Snowfall totaled 10.0 inches 4 miles south-southwest of Arthur and 7.1 inches 3 miles northeast of Battle Creek.
Snowfall totaled 9.7 inches 4 miles north-northeast of Hornick, 8.0 inches at Correctionville, and 7.5 inches in Sioux City.
Snowfall totaled 7.0 inches at Primghar and 6.0 inches at Sheldon.
Snowfall totaled 8.2 inches at Remsen, 8.0 inches 3 miles southeast of Brunsville and Le Mars, and 7.0 inches 1 mile north of Hospers.
Snowfall totaled 9.0 inches at Orange City and Granville, 8.0 inches at Rock Valley and Sioux Center, and 6.0 inches in Hull.
Snowfall totaled 8.0 inches at Peterson and 5.6 inches at Spencer.
Snowfall totaled 7.0 inches 3 miles east-southeast of Lester and 6.0 inches in Rock Rapids and Larchwood.
Snowfall totaled 5.5 inches in Sibley and 3.0 inches in Ocheyedan.
Snowfall totaled 7.3 inches at Spirit Lake and 6.5 inches 1 mile north of Okoboji.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2023Every state in 2023This day in weather historyWarnings in Iowa, January 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: 1077790, 1077791, 1077794, 1077799, 1077796, 1077797, 1077798, 1077792, 1077795, 1077800, 1077793.