Clay storm history

Rainfall amounts across Clay County from June 20-22 ranged from 3 to 7 inches. Farther north and upstream, up to 10 inches of rain fell across portions of northwest Iowa. This rainfall resulted in extensive overland flooding and record flooding along the Little Sioux and Ocheyeda…

A brief period of light freezing rain produced a glaze of icing early on Saturday, December 28 before temperatures climbed above freezing. Light mixed precipitation returned and changed quickly to snow during the afternoon of December 29, then continued into December 30 producing…

A period of precipitation began with freezing rain quickly producing heavy ice accumulations, ranging up to between a quarter and half inch. The precipitation then changed to sleet and then snow, with sleet and snow accumulations reaching 2 to 4 inches. Many branches, limbs, whol…

Two episodes of extended blizzard conditions occurred over a slightly less than 24 hour period, with a slight improvement in conditions during the late afternoon to mid evening. Gusty northwest winds from 35 to 50 mph were concurrent with light to moderate snowfall, which totaled…

Sustained winds reached around 40 to 45 mph with a gust as high as 62 mph near Spencer.

Intermittent whiteout conditions were common through the afternoon with gusty winds of 40 to 60 mph and periods of light snowfall. Travel was not recommended during much of the afternoon.

Wind chills reached as low as -34 degrees at Spencer.

Synoptic northwest winds were occasionally sustained from 40 to 45 mph with gusts as high as 61 mph at an Automated Surface Observing System site near Spencer.

Snowfall totaled 6.0 inches 7 miles south of Spencer and 4.0 inches 1 mile north of Spencer.

A long-duration snowfall totaled 13.0 inches at Spencer and 6.0 inches 7 miles south of Spencer.

Sustained winds reached 30 to 38 mph at times with a peak gust of 54 mph at the Automated Surface Observing System site near Spencer.

Snowfall totaled 3.6 inches at Sioux Rapids and 2.8 inches at Spencer.

Dangerous heat index values peaked as high as 107 degrees 2 miles southeast of Spencer on August 16.

Spotty minor tree damage occurred across town with scattered small limbs blown down.

Thunderstorm winds uprooted several trees throughout town.

An extended period of damaging thunderstorm wind gusts was recorded by station KSPW northwest of Spencer. Initial severe wind gusts were measured at 2135 CST with a peak wind gust of 92 mph at 2142 CST.

Dangerous heat index readings reached an afternoon peak as high as 106 degrees near Spencer.

Heat index values peaked during the afternoon hours of July 23 as high as 102 degrees near Spencer and 101 degrees at Webb.

Thunderstorm wind gusts measured by a personal weather station at Webb.

Daily afternoon and evening heat indices ranged from 105 to 108 degrees with a maximum heat index of 108 degrees at a personal weather station in Webb and 106 degrees near Spencer on June 20.

Winds were measured by a personal weather station.

Two trees were blown down along 280th Street west of Fostoria.

Hail was mostly dime to quarter sized, but some stones were as large as ping pong balls.

Aided by rain showers, winds briefly gusted above 58 mph, with a peak gust of 60 mph at the Spencer Municipal Airport (KSPW).

Snowfall totaled 2.5 inches 7.0 miles south of Spencer and 2.0 inches 1.0 mile north of Spencer. Northwest winds gusted between 40 and 50 mph with a peak gust of 61 mph reported by a private weather station near Webb. A 56 mph gust was also reported by the ASOS at Spencer Municip…

Sustained winds occasionally reached 30 to 40 mph during the morning. A peak wind gust of 61 mph was recorded at 1015 CST by a private weather station near Webb. The wind also gusted to 56 mph at 1044 CST at the Spencer Municipal Airport ASOS (KSPW).

Snowfall totaled 2.0 inches at Spencer.

Sustained winds reached from 40 to 46 mph at times with gusts as high as 62 mph near Spencer.

Snowfall totaled 3.2 inches at Spencer, and northwest winds were sustained from 40 to 46 mph at times with gusts up to 62 mph. Wind and snowfall combined to result in widespread white-out conditions at times, especially in rural areas. Travel was not recommended during the height…

Winds were sustained at times from 40 to 46 mph with a peak gust of 62 mph near Spencer.

The lowest wind chills ranged from 35 to 40 below zero with 40 below zero observed at the Iowa Department of Transportation site near Spencer. The Northwest Iowa Regional Airport (KSPW) near Spencer reported a minimum wind chill of 35 below zero.

The lowest wind chills ranged from 35 to 40 below zero with 40 below zero observed at the Iowa Department of Transportation site near Spencer. The Northwest Iowa Regional Airport (KSPW) near Spencer recorded a minimum wind chill of 34 below zero.

The lowest wind chills ranged from 35 to 40 below zero with 40 below zero observed at the Iowa Department of Transportation site near Spencer. The Northwest Iowa Regional Airport (KSPW) near Spencer reported a minimum wind chill of 34 below zero.

Winds were sustained at times from 30 to 38 mph with gusts up to 51 mph at Spencer.

Winds were occasionally sustained from 30 to 37 mph with gusts as high as 53 mph near Spencer.

Winds were sustained from 30 to 40 mph with gusts to 58 mph at Spencer.

Wind gusts up to 53 mph occurred near Spencer.

Severe (D2) drought at the start of November improved to moderate (D1) status at mid-month with 2 to 3 inches of rainfall during the first half of the month.

Severe (D2) drought developed with precipitation from 4 to 5 inches below normal since August 1.

Afternoon and early evening heat index values reached as high as 108 degrees near Spencer on August 25, and 113 degrees near Spencer and 111 degrees at Webb on August 26.

Afternoon heat index values peaked at 100 degrees at the Automated Surface Observing System site near Spencer and the Iowa Road Weather Information System site near Spencer.

Two-day heat index values peaked at 100 degrees at a Iowa Road Weather Information System site near Spencer.

Heat index values reached 100 degrees near Spencer.

Daily afternoon and evening heat indices ranged from 100 to 107 degrees with a maximum heat index of 107 degrees at a Road Weather Information System site and 105 degrees at the Automated Surface Observing System site near Spencer on July 13. Heat index values returned to 101 deg…

Flooding continued from June on the Ocheyedan River near Spencer, with declining river levels. The river fell below flood stage on the evening of July 1st.

Flooding continued from June on the Little Sioux River near Milford, with declining river levels. The river fell below flood stage on the morning of July 8th.