Moderate to strong northwest winds and bitterly cold air combined to lower wind chill readings to 20 to 35 degrees below zero over part of northwest Iowa from the evening of January 20th through the morning of January 21st.
Every event with a place to put it; 6 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.
Moderate to strong northwest winds and bitterly cold air combined to lower wind chill readings to 20 to 35 degrees below zero over part of northwest Iowa from the evening of January 20th through the morning of January 21st.
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 20, 5:15 PM CST, 45 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
6 cold/wind chill. Local standard time, as filed.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
Northwest winds 15 to 30 mph combined with temperatures well below zero to lower wind chills to 20 to 35 degrees below zero.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2013Every state in 2013This day in weather historyWarnings in Iowa, January 2013
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: 428981, 428982, 428983, 428984, 428985, 428986.