A prolonged stretch of dangerous heat impacted eastern Nebraska and southwest Iowa from Friday, June 20th through Sunday, June 22nd, 2025. The heat was driven by a mid-level ridge centered over the central Plains, resulting in oppressive conditions across the region.
Every event with a place to put it; 8 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 OAX wrote it up.
A prolonged stretch of dangerous heat impacted eastern Nebraska and southwest Iowa from Friday, June 20th through Sunday, June 22nd, 2025. The heat was driven by a mid-level ridge centered over the central Plains, resulting in oppressive conditions across the region. Heat index values peaked between 109 and 115 degrees, based on observations from ASOS/AWOS sites and personal weather stations. Overnight lows remained uncomfortably warm, ranging from the mid-70s to around 80 degrees, with minimum heat indices lingering in the upper 70s to mid 80s. This lack of overnight relief contributed to accumulating heat stress, particularly among vulnerable populations.
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 Omaha, NE wrote its last area forecast discussion before the first event at Jun 20, 10:38 AM CST, 22 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
8 excessive heat. Local standard time, as filed.
Personal weather station measured heat index of 109 and 110 degrees.
Personal weather station measured heat index of 108, 112 and 113 degrees.
KHNR AWOS measured heat index up to 105 degrees with a minimum heat index of 73 degrees through the period. Personal weather station measured heat index of 108 degrees.
KCBF AWOS measured heat index up to 108 degrees with a minimum heat index of 73 degrees through the period. Personal weather station measured heat index of 108 and 111 degrees.
Personal weather station measured heat index of 111 and 113 degrees.
KRDK AWOS measured heat index up to 108 degrees with a minimum heat index of 78 degrees through the period. Personal weather station measured heat index of 111, 112 and 113 degrees.
KSDA AWOS measured heat index up to 105 degrees with a minimum heat index of 78 degrees through the period. Personal weather station measured heat index of 109 degrees.
KICL AWOS measured heat index up to 110 degrees with a minimum heat index of 72 degrees through the period. Two personal weather stations measured heat index values of 110 degrees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2025Every state in 2025This day in weather historyWarnings in Iowa, June 2025
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: 1268757, 1268758, 1268759, 1268760, 1268761, 1268762, 1268763, 1268764.