A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. Read More >
Overview
A compact strong upper wave moved east from northeast Nebraska into northern Iowa the night of April 17-18, bringing rain, sleet and snow across the area. As the system approached the region, rain and a mix of precipitation started to fall along the Missouri River into northwest Iowa shortly after midnight. Rain quickly changed to moderate snow (heavy at times) along and west of the I-29 corridor, while northwest Iowa were reporting thunder sleet and thunder snow early in the morning hours. Precipitation quickly changed to widespread snow after 4 am Wednesday, with snowfall rates of 1 to 2 inches per hour. Snowfall amounts range from 2 to 10 inches. Highest snow accumulations occurred from the Interstate 90 corridor and southward. |
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Snow/Ice
...48 Hour Snowfall Reports From April 18th... Location Amount Time/Date Provider 10 W Dimock 10.2 in 0800 AM 04/18 COCORAHS Wall Lake 10.0 in 0800 AM 04/19 COCORAHS Tyndall 9.0 in 0800 AM 04/19 COOP Bridgewater 7.5 in 0800 AM 04/19 COOP 4 N Cleghorn 7.0 in 0700 AM 04/19 COCORAHS Cherokee 7.0 in 0800 AM 04/19 COOP Sioux Falls Airport 6.2 in 0656 AM 04/19 ASOS 2 NE Crooks 6.2 in 0700 AM 04/19 COCORAHS 3 WNW Everly 6.0 in 0700 AM 04/19 COOP Lakefield 5.6 in 0700 AM 04/19 COOP Sheldon 5.5 in 0700 AM 04/19 COOP Remsen No. 2 5.4 in 0625 AM 04/19 COOP 2 NE Academy 5.0 in 0900 AM 04/19 COOP Orange City 4.8 in 0700 AM 04/19 COOP Salem 5NE 4.7 in 0700 AM 04/19 COOP White Lake 4.3 in 0700 AM 04/19 COOP Worthington 4.2 in 0700 AM 04/19 COOP 4 SW Burke 4.0 in 0700 AM 04/19 COCORAHS Sioux City ANG 3.6 in 0600 AM 04/19 COOP 6 S Oacoma 3.5 in 0630 AM 04/19 COCORAHS 7 WNW Naper 3.0 in 0700 AM 04/19 COCORAHS Chester 2N 3.0 in 0700 AM 04/19 COOP Burke 2.4 NE 3.0 in 0700 AM 04/19 COCORAHS 8 S Dallas 3.0 in 0700 AM 04/19 COCORAHS Woonsocket 2.9 in 0800 AM 04/19 UCOOP Sioux Gateway Airport 2.5 in 0652 AM 04/19 ASOS Chamberlain 2.4 in 0530 AM 04/19 COCORAHS Howard 2.4 in 0630 AM 04/19 COOP Huron Regional Airport 2.0 in 0655 AM 04/19 ASOS 2 E Madison 1.5 in 0900 AM 04/19 COOP Holly Springs 1NW 1.0 in 0700 AM 04/19 COOP Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official.
Record Snowfall
Photos & Video:
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Visible Satellite Imagery from GOES16 showing the system before it moved through the area. | Car Accident during the morning commute at I-90 near Montrose, SD (Courtesy of South Dakota Department of Transporation) |
Radar:
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Radar Loop April 18, 2018 (1 am - 7 am) Areas of rain, snow and sleet quickly moving east-northeast into the region |
Radar Loop April 18, 2018 (7 am - 1 pm) Widespread snow, heavy at times, continues in the morning, impacting the morning commute. |
Radar Loop April 18, 2018 (1 pm - 7 pm) Snow gradually tapering off as the system moves out of the region. |
Radar Reflectivity and Lighting (White Dots) Radar loop from 1 am to 7 am Wednesday Lightning Data Provided by the National Lightning Detection Network (NLDN) |
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