Fremont storm history

Flooding along the Nishnabotna River. The river gage above Hamburg, operated by the USGS, peaked at 31.07 feet at 11 am on March 16th. Moderate flood stage is 27.5 feet while major flood stage is 33 feet. Preliminary informations shows this peak is the 3rd highest on record. Floo…

Thurman was evacuated due to a levee break on the Missouri River.

Flooding along the Missouri River gradually improved over the area during September as releases from Gavins Point Dam were reduced. The river at Nebraska City, which reached a record crest of a little over 28 feet by the end of the June, had fallen to around 20.5 feet by the firs…

Flooding along the Missouri River gradually worsened over the area during June into July as record inflows into the Missouri River above Sioux City in June and much above normal inflows during July prompted record releases from Gavins Point Dam. The river at Nebraska City reached…

A swath of damaging winds moved through Fremont County, Iowa, during the morning of August 10th, 2025. The event produced widespread damage, primarily characterized by high-end estimated straight-line wind gusts between 90 and 95 miles per hour across the county, confirmed by eme…

KSDA AWOS measured heat index up to 114 degrees. Personal weather stations and mesonets measured heat index of 118 degrees.

KSDA AWOS measured heat index up to 118 degrees with a minimum heat index of 73 degrees through the period. Personal weather station measured heat index of 110 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.

Trained spotter report of hail estimated up to 1.75 in diameter.

General snowfall amounts of 2 to 4 inches. KSDA AWOS reported 1/2 mile visibility from 19:55 CST until an unknown time due to data loss. Surrounding conditions supporting blizzard criteria. Wind gusts up to 47 mph.

Personal weather station measured 47 mph wind gust. Surrounding conditions support High Wind Warning, with a 66 mph measured gust east of the county border.

Wind chill got as low as -32 in the county.

Although no snowfall reports were received in the county, 6 of snowfall was estimated from public reports in surrounding counties. The heaviest snowfall was estimated around the southern edge of the county.

Though no direct measurements were made in the county of severe level wind gusts, observations from surrounding counties support the high likelihood of wind gusts up to 58 mph occurring the afternoon of the 19th.

Afternoon highs in the upper 90s and dew points in the mid 70s brought head indices of 110 to 120 across the county for two consecutive afternoons. The Shenandoah AWOS measured a 118 degree heat index the afternoon of the 25th, and additional mesonets across the county measured h…

A combination of hot temperatures and high dew points brought excessive heat during the afternoon hours. Heat indices climbed as high as 112 degrees for portions of the county.

A combination of hot afternoon temperatures and high dew points brought a brief period of excessive heat during the afternoon, with heat indices up to 110 being observed in a few counties across southwest Iowa.

A maximum heat index of 110 degrees was observed the afternoon of the 15th.

Emergency management reported lots of hail the size of dimes and nickels with a few quarter sized hail stones mixed in. Time slightly adjusted to account for a delay in the report from when the hail actually fell.

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…

A max heat index of 116 was observed at the Shenandoah Municipal Airport (AWOS).

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 Nebraska City cresting at 24.35 feet on 6/30. Flood stage at this river gau…

Quarter sized hail was reported in Imogene via mPING.

Quarter sized hail was reported in Imogene via mPING.

A funnel cloud was reported by broadcast media extending halfway to the ground. This was just south of the town of Imogene.

The office received a public report of quarter sized hail.

Wind chills across the county dropped under 35 degrees below zero every night during the duration of this event. The coldest wind chills were felt January 13th and 14th. The coldest recorded wind chill in the county was 43 below zero, measured at the Shenandoah Airport the mornin…

An estimated 5 to 7 inches of snow fell across the county during this winter storm. Storm total snow measurements were made difficult due to the amount of blowing and drifting snow. Peak wind gusts across the county ranged from 30 to 45 miles per hour. The highest observed wind g…

Snow throughout the day on the 8th struggled to stick on sidewalks and roadways as ground temperatures hovered just above freezing. Snow rapidly accumulated once temperatures were able to drop at night. An estimated 6 to 8 inches of snow fell across the county for this winter sto…

Beginning on August 19, the high temperature at the Shenandoah AWOS reached at least 95 each day through August 25 except for August 20. The highest observed temperature was 99 on August 24. The peak heat index reached at least 108 each day. The highest calculated heat index was …

Shenandoah AWOS had a heat index at or above 110 for approximately 6 hours. The peak heat index was 114.

Emergency management relayed photos of numerous downed trees and branches in Thurman.

Public reported via mPing of 1-inch tree limbs broken; shingles blown off.

Public sent a video of a brief tornado kicking up a bit of dust resulting in no damage.

Public reported 1.75-inch hail.

Trained spotter reported 1-inch hail.

Emergency manager reported 1.75-inch hail.

Public reported 1.5-inch hail.

Public reported 3-inch hail near Thurman.

Trained spotter reported 1.75-inch hail.

Public reported 2-inch hail.

Trained spotter reported quarter size hail.

Trained spotter reported 1-inch hail.

Public reported 1.75-inch hail.