Here is a summary statement concerning the damage survey
conducted by the National Weather Service in Bismarck
from June 29. Below the statement is a list of pertinent
local storm reports. 

Public Information Statement
National Weather Service Bismarck ND
255 PM CDT Sat Jun 30 2018 /155 PM MDT Sat Jun 30 2018/

...NWS DAMAGE SURVEY FOR 06/28/18 into 06/29/18 STORM EVENT...

On the evening of Thursday, June 28, 2018, and into the early
morning hours of Friday, June 29, intense thunderstorms produced
damaging winds, including a microburst with estimated 130 mph
winds, very large hail, and flash floods, in parts of western
and central North Dakota. The worst damage was reported to be
northwest of Stanton, Mercer County. A weather related fatality
was reported at Hecker`s Lake, McLean County. Based on this
information National Weather Service meteorologists
conducted a storm damage survey in these areas on June 29.

Eventually, a solid line of thunderstorms would extend through
the entire state of North Dakota, north to south, from the
Canadian border to the South Dakota line.

The worst of the damage started about 7 miles south-southwest of
Pick City (Mercer County), continued through Stanton, through the
area 6 miles north of Washburn (McLean County), to Hecker`s Lake
(McLean County). Storm winds through this area were generally
65 to 85 mph. Within that was the microburst with estimated 130
mph winds.

Path length /statute/: about 40 miles
Path width /Maximum/:  about 20 miles

.THUNDERSTORM WIND - MICROBURST...

Peak wind Estimated:    130 mph
Fatalities:             none
Injuries:               none

Date:                   June 29 2018
Time:                   12:30 AM CDT
Location:               4 miles NNW Stanton / Mercer County / ND

An intense microburst occurred at this location with estimated
130 mph winds. Every building on the property was severely damaged,
some destroyed. The farm house was very heavily damaged with the
roof torn from the home. Four people inside sought shelter in the
basement and were not injured. Large diameter trees were snapped.
Of the property damage surveyed across Mercer and McLean counties
this was the absolute worst by far.

NWS thanks the Mercer County Emergency Manager for accompanying
us on the survey and being a liaison between the NWS and the
victims of this disaster. Having the EM accompany us allowed us
to move more quickly and visit more damage sights than we would
have been able to on our own.

.THUNDERSTORM WIND - 1 FATALITY AND 4 INJURIES...

Peak wind Estimated:    80 mph
Fatalities:             1 - a 42 year old male
Injuries:               4

Date:                   June 29 2018
Time:                   01:00 AM CDT
Location:               Hecker`s Lake, about 10 miles south of the
                        city of Mercer / McLean County / ND

About 30 camping trailers damaged, some destroyed, as they overturned
and rolled, some into Hecker`s and New Johns lakes.

NWS thanks the McLean County Sheriff`s Department for accompanying
us on this survey and providing preliminary results of their
investigation into this tragedy. The professionalism, courtesy, and
cooperation shown to NWS meteorologists by the Department allowed us
time to complete our survey of other damage areas before darkness set
in Friday evening.

Note: The information in this statement is PRELIMINARY and subject to
change pending final review of the events and publication in official
NWS Storm Data.

JP Martin

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BISMARCK ND
313 PM CDT SAT JUN 30 2018

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

1225 AM     TSTM WND DMG     7 SSW PICK CITY         47.41N 101.49W
06/29/2018                   MERCER             ND   NWS STORM SURVEY

            ESTIMATED 85 MPH WIND. DAMAGE TO A MEDIUM
            SIZED WOODEN OUTBUILDING ON A FARM. PART OF
            BUILDING SHIFTED OFF FOUNDATION, FRONT DOOR
            TORN OFF, BACK WALL BLOWN OUT. THIS WAS
            ALONG A LONG LINE OF GENERALLY 65 TO 85 MPH
            THUNDERSTORM WINDS. APEX OF WORST DAMAGE -
            THIS LOCATION, THROUGH STANTON, TO ABOUT 6
            MILES NORTH OF WASHBURN, TO HECKERS / NEW
            JOHNS LAKES. MICROBURST WINDS OF 130 MPH
            OCCURRED 4 NNW OF STANTON AT 1230 AM CDT.

1230 AM     TSTM WND DMG     4 NNW STANTON           47.38N 101.43W
06/29/2018                   MERCER             ND   NWS STORM SURVEY

            AN INTENSE MICROBURST OCCURRED AT THIS
            LOCATION WITH ESTIMATED 130 MPH THUNDERSTORM
            WINDS. EVERY BUILDING ON THE PROPERTY WAS
            SEVERELY DAMAGED, SOME DESTROYED. THE FARM
            HOUSE WAS VERY HEAVILY DAMAGED WITH THE ROOF
            TORN FROM THE HOME. FOUR PEOPLE INSIDE
            SOUGHT SHELTER IN THE BASEMENT AND WERE NOT
            INJURED. LARGE DIAMETER TREES WERE SNAPPED.
            OF THE PROPERTY DAMAGE SURVEYED ACROSS
            MERCER AND MCLEAN COUNTIES THIS WAS THE
            ABSOLUTE WORST BY FAR.

1235 AM     TSTM WND DMG     3 NNW STANTON           47.37N 101.40W
06/29/2018                   MERCER             ND   NWS STORM SURVEY

            ESTIMATED 85 MPH WIND. LARGE WOODEN
            OUTBUILDING COMPLETELY DESTROYED. THIS WAS
            ALONG A LONG LINE OF GENERALLY 65 TO 85 MPH
            THUNDERSTORM WINDS. APEX OF WORST DAMAGE - 7
            SSW PICK CITY, THROUGH STANTON, TO ABOUT 6
            MILES NORTH OF WASHBURN, TO HECKERS / NEW
            JOHNS LAKES. MICROBURST WINDS OF 130 MPH
            OCCURRED 4 NNW STANTON AT 1230 AM CDT.

1240 AM     TSTM WND DMG     STANTON                 47.32N 101.38W
06/29/2018                   MERCER             ND   NWS STORM SURVEY

            ESTIMATED 80 MPH WIND. NUMEROUS LARGE TREE
            BRANCHES BROKEN AND SEVERAL LARGE TREE
            TRUNKS SNAPPED. A FEW GARAGES HAD A WALL
            TORN OFF OR PARTS OF THE ROOF TORN OFF. THIS
            ALONG A LONG LINE OF GENERALLY 65 TO 85 MPH
            THUNDERSTORM WINDS. APEX OF WORST DAMAGE - 7
            SSW PICK CITY, THROUGH STANTON, TO ABOUT 6
            MILES NORTH OF WASHBURN, TO HECKERS / NEW
            JOHNS LAKES. MICROBURST WINDS OF 130 MPH
            OCCURRED 4 NNW STANTON AT 1230 AM CDT.

1250 AM     TSTM WND DMG     3 ENE FALKIRK           47.38N 101.03W
06/29/2018                   MCLEAN             ND   NWS STORM SURVEY

            ESTIMATED 95 MPH WINDS. HALF OF A METAL
            OUTBUILDING ON A FARM WAS TORN OFF. ABOUT 10
            WOODEN POWER POLES JUST NORTH OF HERE WERE
            BROKEN. THIS ALONG A LINE OF GENERALLY 65 TO
            85 MPH THUNDERSTORM WINDS. APEX OF WORST
            DAMAGE - 7 SSW PICK CITY, THROUGH STANTON
            AND THIS LOCATION, TO HECKERS / NEW JOHNS
            LAKES. MICROBURST WINDS OF 130 MPH OCCURRED
            4 NNW STANTON AT 1230 AM CDT.

0100 AM     TSTM WND DMG     1 NW NEW JOHNS LAKE     47.33N 100.68W
06/29/2018                   MCLEAN             ND   NWS STORM SURVEY

            *** 1 FATAL, 4 INJ ***
            THERE WAS A FATALITY, A 42 YEAR OLD MALE, AT
            THIS LOCATION NEXT TO HECKERS LAKE IN MCLEAN
            COUNTY, VERY NEAR THE BURLEIGH AND SHERIDAN
            COUNTY LINE. ABOUT 30 CAMPING TRAILERS
            DAMAGED, SOME DESTROYED, AS THEY OVERTURNED
            AND ROLLED IN AN ESTIMATED 80 MPH
            THUNDERSTORM WIND. 4 OTHERS WERE INJURED IN
            THE CAMPING AREAS AROUND HECKERS AND NEW
            JOHNS LAKES.

THIS IS A SUMMARY OF LSRs SENT RELATED TO THE NWS DAMAGE SURVEY
CONDUCTED ON JUNE 29, 2018.

JP MARTIN