National Weather Service United States Department of Commerce

Storm Impacting the Northwest U.S.; Fire Weather Conditions in Southern California; Severe Weather in the South

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

Several rounds of thunderstorms moved through the region during the week of September 18 - 21, 2018.  These thunderstorms brought heavy rain to the region, with widespread accumulations between 4 to 7 inches, and localized amounts greater than 10 inches.

In addition to the heavy rain, a quick moving line of thunderstorms during the afternoon and evening hours of September 20th, produced wind damage across portions of northwestern Iowa and southern Minnesota.   A brief tornado was also reported in Superior, IA.  

Heavy rainfall will slowly drain into area streams and rivers, and is producing moderate to even record flooding in a few rivers across northwest Iowa.  Cities like Cherokee, Le Mars, Rock Valley, and Spencer have been hit the hardest by flooding, but high waters are impacted numerous cities across the region. 

Image
Storm Total Rainfall - September 18-21, 2018
Image Severe Weather Reports Image
Radar Overview Severe Weather Reports Rainfall Climatology - Sioux Falls
nws logo Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.
nws logo