Mills storm history

Light snow accompanied an Arctic cold front that passed through the area during the afternoon of January 11th. Although snow amounts were mostly 1/2 inch or less, the ground temperatures were above freezing when the snow started which caused some initial melting. The roads quickl…

Flooding along the Missouri River, which had gradually worsened over Mills county during June and July, persisted into August. However, conditions began improving by the end of the month as record releases from Gavins Point Dam were gradually reduced during August, especially by …

Rainfall of 3 to 4 inches fell across the Glenwood area which caused Keg Creek to flash flood across parts of town. The flooding prompted emergency management crews to go door-to-door to alert residents about the impending flood, although no mandatory evacuations were required. F…

Personal weather station measured wind gust of 61 mph near Emerson, IA.

Personal weather station measured wind gust of 61 mph near Emerson, IA.

Personal weather station measured wind gust of 66 mph near Emerson, IA and 65 mph measured near Pacific Junction, IA.

Personal weather station measured wind gust of 63 mph near Emerson, IA and 62 mph near Silver City, IA. Mills County EM reported about 900 without power in Glenwood due to multiple power lines downs in the county. These winds may have been the result of a localized downdraft from…

Trained spotter report of hail with most stones estimated at 0.5 inches in diameter, and a few stones up to 0.75 inches in diameter.

Personal weather station measured wind gust of 58 mph.

Personal weather station measured wind gust of 74 mph.

Heavy thunderstorms generated flash flooding across Mills County, Iowa, particularly in the western portion, on the morning of August 10, 2025. Rainfall totals were measured between 3.1 and 3.96 inches, though radar estimates indicated up to 3 to 5 inches across the area. The del…

Personal weather stations and mesonets measured heat index of 115 and 116 degrees.

Personal weather station measured heat index of 113 and 116 degrees.

Trained spotter report of downed 4 inch in diameter tree branches. Wind gusts were estimated near 60-65 mph.

Personal weather station measured wind gust of 61 mph.

Personal weather station measured wind gust of 66 mph. The wind damage occurred on the north side of a small thunderstorm complex moving through the area, where evaporative cooling of anvil precipitation likely bolstered downdraft strength.

Personal weather station measured wind gust of 76 mph. The wind damage occurred on the north side of a small thunderstorm complex moving through the area, where evaporative cooling of anvil precipitation likely bolstered downdraft strength.

Trained spotter estimated wind gust of 60 mph.

Personal weather station measured wind gust of 62 mph. The wind damage occurred on the north side of a small thunderstorm complex moving through the area, where evaporative cooling of anvil precipitation likely bolstered downdraft strength.

Personal weather station measured heat index of 111 and 113 degrees.

Personal weather station measured gust of 62 mph.

Public report of hail estimated up to 1 in diameter. Report received via mPING.

Personal weather station measured gust of 65 mph, likely due to the evaporating of anvil precipitation helping to mix down a strong low-level jet.

Mesonet measured wind gust of 58 mph.

Mesonet measured wind gust of 60 mph.

General snowfall amounts of 2 to 5 inches, with the highest totals in the northwest portion of the county. While there is no ASOS/AWOS in the county, 1/2 mile visibility was reported from a surrounding AWOS from 7:55 CST to 23:55 CST with surrounding conditions supporting blizzar…

No observations in the county, though surrounding conditions support High Wind Warning, with a 60 mph gust just outside the western edge of the county.

A 61 mph wind gust was measured by a personal weather station, associated with an 8 degree Fahrenheit heat burst.

Interpolation of nearby observations suggests wind chills got as low as -32 in the county.

Interpolation of nearby observations suggests wind chills got as low as -30 in the county.

There were two personal weather stations that measured a 66 and 67 miles per hour wind gust in Mills County. These wind gusts were artificially high, though given observations from surrounding counties, wind gusts up to 60 miles per hour were likely to have occurred during this t…

A trained spotter reported an old oak tree that had been snapped about 20 feet up the trunk. Several smaller branches were also noted as being blown down.

Max afternoon heat indices ranging from 110 to 119 degrees were observed from mesonet sites in Glenwood.

A mesonet station recorded a 76 miles per hour wind gust.

A mesonet station recorded a 64 miles per hour wind gust.

A mesonet station recorded a 73 miles per hour wind gust.

Heat indices up to 113 impacted portions of the county for a few hours during the afternoon.

This is a continuation of river flooding from the end of June. River levels crested along this stretch of the Missouri at the end of June, hence flood waters were receding by this time. As such, the greatest impacts were felt in June (and discussed in the June entry for StormData…

Excessive rainfall across much of eastern South Dakota resulted in river flooding along the Missouri River at the end of June. Moderate flood stage was observed along the Missouri, with the river gauge in Bellevue cresting at 33.84 feet on 6/29. Flood stage at this river gauge is…

Law enforcement estimated 60 miles per hour wind gusts in the city of Glenwood.

A 62 miles per hour wind gust was recorded on a personal weather station.

Emergency Management reported an overturned semi at the southbound rest area on Interstate 29 in Mills County.

A 59 miles per hour wind gust was measured on a personal weather station.

Emergency Management relayed a report of down powerlines and limbs on cars in the town of Henderson.

A 58 miles per hour wind gust was measured by a personal weather station.

The office received a report from amateur radio of 1 inch hail.

The office received a public report of golf ball sized hail.

Shortly past half the hour the office began receiving reports of hail up to the size of golf balls in Malvern. Hail continue to fall for the next 15 minutes and grew in size after the initial report. The largest measured hailstone was 2.25 inches in diameter.