National Weather Service United States Department of Commerce

Heavy Snow and Strong Winds Across the North-Central U.S.; Heavy Rain and Flash Flooding in American Samoa and Puerto Rico

Areas of moderate to heavy snow and gusty to high winds are expected across the Northern Plains, Upper Midwest and Great Lakes into Friday. Several inches of snow accumulation is expected. Heavy rain will bring an isolated flash flood threat to Puerto Rico and flash flooding along with mudslides to American Samoa today. Read More >

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
628 PM CDT FRI JUN 23 2023 /528 PM MDT FRI JUN 23 2023/

...NATIONAL WEATHER SERVICE SURVEYED DAMAGE FROM JUNE 21, 2023 IN
SIOUX COUNTY NORTH DAKOTA...

TODAY, JUNE 23, 2023, METEOROLOGISTS FROM THE NATIONAL WEATHER SERVICE
IN BISMARCK SURVEYED STORM DAMAGE FROM JUNE 21 ACROSS SIOUX 
COUNTY, THE STANDING ROCK NATION. AT EACH LOCATION VISITED THE 
EVIDENCE WAS THAT HIGH THUNDERSTORM WINDS RESULTED IN THE DAMAGE. 
AT ONE LOCATION INTENSE WINDS FROM A MICROBURST WITH WIND SPEEDS 
AROUND 125 MPH COMPLETELY DESTROYED A MANUFACTURED HOME AND
INJURED ONE PERSON.

WE SPOKE TO MANY PEOPLE TODAY AND EVERYONE WAS WELCOMING AND VERY
HELPFUL IN ASSISTING US IN DETERMINING WHAT HAPPENED THE EVENING 
OF JUNE 21. FOLKS ALLOWED US TO COME ONTO THEIR PROPERTY AND 
PHOTOGRAPH THE DAMAGE. WE APPRECIATED THE HOSPITALITY SHOWN TO US.

HERE ARE DETAILS ON THE EVENT. THIS WILL ALSO BE POSTED AS A 
HEADLINE ON THE NWS BISMARCK WEB PAGE FOR A FEW DAYS...
WEATHER.GOV/BIS


..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0955 PM     TSTM WND GST     5 SSW SELFRIDGE         45.98N 100.96W
06/21/2023  E75 MPH          SIOUX              ND   NWS STORM SURVEY 

            DAMAGE TO THE ROOF OF AN OUTBUILDING ON A 
            FARM. AN UNATTACHED HORSE TRAILER WAS PUSHED 
            THROUGH A FIELD. PROPERTY HAD AN ANEMOMETER 
            AND MEASURED 62 MPH AT WHICH POINT THE CUPS 
            BROKE OFF. 

1000 PM     TSTM WND GST     6 S SELFRIDGE           45.96N 100.94W
06/21/2023  E70 MPH          SIOUX              ND   NWS STORM SURVEY 

            LARGE TREE BRANCHES WERE BROKEN. 

1018 PM     TSTM WND GST     6 ESE SELFRIDGE         46.01N 100.80W
06/21/2023  E125 MPH         SIOUX              ND   NWS STORM SURVEY 

            *** 1 INJ *** DAMAGE SURVEY REVEALED THAT A MICROBURST
             WITH WIND SPEEDS AROUND 125 MPH STRUCK THIS PROPERTY
             AND COMPLETELY DESTROYED A MANUFACTURED HOME WHICH
             ROLLED ONTO A VEHICLE CRUSHING THE ROOF AND PARTIALLY
             DAMAGING ANOTHER VEHICLE. PARTS OF THE HOME WERE
             BLOWN INTO A BARN, SEVERELY DAMAGING IT. THE DEBRIS
             PATTERN WAS DIVERGENT IN NATURE AND ORIENTED TOWARD
             THE E/SE. TWO PEOPLE WERE IN THE HOME AT THE TIME.
             ONE WAS INJURED AND HOSPITALIZED.