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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 >

Three wet microbursts were identified within a squall line that moved through the Sioux Falls area during the early morning hours of June 11th. A microburst is essentially an area of strong surface winds which are accelerated to the ground from aloft in a thunderstorm, and a wet microburst is that which is accompanied by falling precipitation. For a more extensive review of the damage, please see our damage survey. The following image displays the locations damage across the city, as well as the tracks of the three microbursts, represented by the orange, purple, and red rings. The orange and purple tracks likely extended further into central portions of the city, but cannot be identified due to limited radar coverage.

Map showing wind damage throughout Sioux Falls from microburst

 

These reports are summarized in this table, which lists the damage sustained, the estimated wind speed (if available), and the latitude and longitude of the damage.

 

Description

Speed

Latitude Longitude
Damage to homes 100 mph 43° 30' 29" N 96° 49' 30" W
Large tree down 65 mph 43° 30' 33" N 96° 48' 38" W
Branches down 60 mph 43° 30' 34" N 96° 48' 35" W
Tree damage 60 mph 43° 30' 27" N 96° 49' 53" W
Large tree down   43° 30' 27" N 96° 46' 16" W
Power lines down   43° 32' 15" N 96° 42' 23" W
Tree down   43° 30' 50" N 96° 43' 28" W
Tree down   43° 30' 50" N 96° 43' 29" W
Tree down   43° 33' 34" N 96° 45' 18" W
Tree down   43° 30' 54" N 96° 43' 25" W
Tree down   43° 31' 59" N 96° 42' 41" W
Tree down   43° 32' 07" N 96° 42' 27" W
Tree down   43° 32' 55" N 96° 32' 37" W
Tree down   43° 32' 25" N 96° 41' 00" W
Branches down   43° 32' 16" N 96° 42' 22" W
Branches down   43° 32' 12" N 96° 41' 57" W