Severe Thunderstorm Warning 42, NWS Bismarck, ND

899 
WWUS53 KBIS 012243
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
543 PM CDT FRI JUN 1 2018

NDC025-053-012300-
/O.CON.KBIS.SV.W.0042.000000T0000Z-180601T2300Z/
Dunn ND-McKenzie ND-
543 PM CDT FRI JUN 1 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM
CDT/500 PM MDT/ FOR NORTHWESTERN DUNN AND NORTHEASTERN MCKENZIE
COUNTIES...

At 542 PM CDT/442 PM MDT/, severe thunderstorms were located along a
line extending from near Wildrose to 15 miles west of 4 Bears Lodge, 
moving north at 70 mph. Ping pong ball size hail was reported at 
Little Missouri State Park.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Mandaree, Little Missouri State Park, Keene, Tobacco Garden Bay
Recreation Area, Charlson and Johnsons Corner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A Tornado Watch remains in effect until 1100 PM CDT/1000 PM MDT/ for
southwestern and northwestern North Dakota.

LAT...LON 4804 10343 4803 10339 4804 10329 4806 10327
      4807 10323 4810 10325 4813 10321 4815 10311
      4814 10309 4813 10309 4814 10295 4812 10290
      4813 10287 4756 10248 4742 10269
TIME...MOT...LOC 2242Z 189DEG 62KT 4858 10322 4804 10289 

HAIL...1.50IN
WIND...60MPH
 
$$

VINING

Area Forecast Discussion
National Weather Service Bismarck ND
132 PM CDT Fri Jun 1 2018

.SHORT TERM...(This evening through Saturday)
Issued at 124 PM CDT Fri Jun 1 2018

The main forecast issue in the short term period will be
thunderstorms today and this evening, then winds tonight into
Saturday.

Surface low pressure was located over far northwest SD early this
afternoon with a strong southeast flow over much of western and
central ND. Some areas are near advisory criteria for winds but
would rather not clog up the airways with wind advisory with
potential for significant severe outbreak unless we see widespread
advisory criteria winds.

We continue to destabilize over western ND this afternoon. SPC has
issued a severe thunderstorm watch for the eastern high plains
east into southwest ND and western SD. Severe convection already
continues over eastern MT and northeast WY and is expected to move
into southwest ND later this afternoon. Additionally we still
expect thunderstorm development to the east of this area, over
western and central ND around mid afternoon. Would not be
surprised with a Tornado Watch or certainly a SVR with possible
tornadoes mentioned. Very strong instability and deep layer shear
are expected to continue to develop over western and central ND
this afternoon. A limiting factor for a tornado watch would be a
limited area and time where shear and discrete cell development
will coincide before convection takes on a more QLCS like
structure. However, with such a strong wave, we do expect
convection will move through the area this afternoon and this
evening. CAMS are in good agreement in moving a single or multiple
line segments through the forecast area during this timeframe. The
12 UTC HREF again supports our strongest updrafts over the lake
Sakakawea region. Really no significant messaging changes from
the early morning forecast.

A strong westerly flow continues tonight behind the convection, and
continues through Saturday. Will probably need some wind
highlights for Saturday but will not issue anything at this time.
There could be some wrap around moisture, with scattered showers
and an isolated thunderstorm across the north Saturday.

.LONG TERM...(Saturday night through Friday)
Issued at 124 PM CDT Fri Jun 1 2018

Upper level ridging builds over the area Saturday night through
Monday. We then return to a quasi-zonal flow Monday night through
Friday with periodic chances of showers and thunderstorms.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 124 PM CDT Fri Jun 1 2018

Intense storms are expected to develop in western ND this
afternoon in the 19 to 21 UTC time frame. Those storms are
expected to move eastward ahead of a cold front and will likely
merge into a line as they reach the KMOT to KBIS areas by late
afternoon or early evening, and KJMS this evening. IFR to LIFR
conditions, large hail, damaging winds and very heavy rainfall may
accompany any severe storms this afternoon and evening.

A strong westerly flow will develop behind the convection and
continue through Saturday.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...TWH
LONG TERM...TWH
AVIATION...TWH

Hazardous Weather Outlook
National Weather Service Bismarck ND
132 PM CDT Fri Jun 1 2018

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-021845-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-Ward-
McHenry-Pierce-McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Wells-
Foster-Golden Valley-Billings-Stark-Morton-Burleigh-Kidder-
Stutsman-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons-Logan-
La Moure-McIntosh-Dickey-
132 PM CDT Fri Jun 1 2018 /1232 PM MDT Fri Jun 1 2018/

This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
southeast North Dakota, and southwest North Dakota.

.DAY ONE...This Afternoon and Tonight

A significant severe weather event is expected this afternoon and
evening. Scattered severe storms will likely first develop across
western North Dakota between 2 pm and 4 pm CDT and are forecast
to merge into a solid line of storms by the time they reach
Highway 83 in the late afternoon or early evening. The line of
storms will then move eastward across the remainder of central
North Dakota and the James River valley this evening. The storms
could produce very large hail, possibly up to the size of tennis
balls, damaging wind gusts up to 70 mph, and very heavy rainfall.
A few tornadoes are also possible this afternoon, with the
greatest tornado risk in areas along and west of Highway 83.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Strong northwest winds gusting up to 45 mph are likely across
western and central North Dakota on Saturday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters will be needed this afternoon and evening. A cold
front will interact with an unstable atmosphere containing enough
wind shear for supercell thunderstorms this afternoon along and
west of Highway 83. Storms will likely merge into a squall line
that will move east across central North Dakota and the James
River valley this evening.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1130 AM CDT FRI JUN 1 2018

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

0606 PM     TSTM WND GST     LEFOR                   46.68N 102.56W
05/31/2018  E60 MPH          STARK              ND   LAW ENFORCEMENT

&&

Special Weather Statement
National Weather Service Bismarck ND
129 PM CDT FRI JUN 1 2018

NDZ001-002-009-010-011915-
Mountrail-Divide-Williams-Burke-
129 PM CDT FRI JUN 1 2018

...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN BURKE...
NORTHEASTERN WILLIAMS...NORTHWESTERN MOUNTRAIL AND SOUTHEASTERN
DIVIDE COUNTIES UNTIL 215 PM CDT...

At 128 PM CDT, a strong thunderstorm was located 7 miles southwest of
Tioga, or 28 miles west of Stanley, moving north at 50 mph.

Winds gusts to 45 mph and penny to nickel size hail are possible
with this storm.

Locations impacted include...
Tioga, Battleview, White Earth, Hamlet and Mcgregor.

Very heavy rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4819 10284 4823 10315 4881 10309 4877 10258
TIME...MOT...LOC 1828Z 190DEG 43KT 4830 10300

HEINERT

Special Weather Statement
National Weather Service Bismarck ND
215 PM CDT FRI JUN 1 2018

NDZ009-010-017-018-032-012000-
McKenzie ND-Mountrail ND-Williams ND-Billings ND-Dunn ND-
215 PM CDT FRI JUN 1 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN
DUNN...NORTHEASTERN BILLINGS...EASTERN MCKENZIE...SOUTHEASTERN
WILLIAMS AND SOUTHWESTERN MOUNTRAIL COUNTIES UNTIL 300 PM CDT/200 PM
MDT/...

At 213 PM CDT/113 PM MDT/, Doppler radar was tracking a line of
strong thunderstorms, extending from near Tioga to Watford City and
near the north unit of Theodore Roosevelt National Park and the
Little Missouri State Park. These storms were moving north at 50 mph.

Half inch hail and wind gusts to 50 mph will be possible with
these storms.

Locations impacted include...
Watford City, Killdeer, New Town, Ray, Dunn Center, Ross, Mandaree,
Belden, Little Missouri State Park, Grassy Butte, 4 Bears Lodge,
Theodore Roosevelt National Park North Unit, Wheelock, Keene, Lewis
And Clark State Park, White Earth Bay Recreation Area, Oakdale,
Charlson, White Tail Bay Recreation Area and Skunk Creek Bay
Recreation Area.

If you are on or near Lake Sakakawea, get out of the water and move
indoors or inside a vehicle. Remember, If you can hear thunder, you
are close enough to be struck by lightning. Do not be caught on the
water in a thunderstorm.

Campers should move to a sturdy shelter until this storm passes.

&&

A Severe Thunderstorm Watch remains in effect until 800 PM CDT/700 PM
MDT/ for southwestern North Dakota.

LAT...LON 4730 10249 4731 10351 4840 10324 4829 10232
TIME...MOT...LOC 1913Z 188DEG 44KT 4775 10308

VINING

Special Weather Statement
National Weather Service Bismarck ND
235 PM CDT FRI JUN 1 2018

NDZ002-012000-
Burke-
235 PM CDT FRI JUN 1 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BURKE COUNTY UNTIL
300 PM CDT...

At 234 PM CDT, a strong thunderstorm was located near Lignite, or 12
miles west of Bowbells, moving northeast at 25 mph.

Winds gusts to 40 mph and pea to penny size hail are possible with
this storm.

Locations impacted include...
Lignite, Portal, Flaxton and Northgate.

Very heavy rainfall is occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

LAT...LON 4900 10211 4863 10253 4869 10281 4900 10268
TIME...MOT...LOC 1934Z 217DEG 23KT 4882 10252

HEINERT

Special Weather Statement
National Weather Service Bismarck ND
309 PM CDT FRI JUN 1 2018

NDZ002-009-010-017-012030-
McKenzie-Mountrail-Williams-Burke-
309 PM CDT FRI JUN 1 2018

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT BURKE...NORTHEASTERN
MCKENZIE...NORTHEASTERN WILLIAMS AND NORTHWESTERN MOUNTRAIL COUNTIES
UNTIL 330 PM CDT...

At 305 PM CDT, radar indicated strong thunderstorms were located
along a line extending from near Portal south to New Town. Movement
was north at 45 mph.

Very heavy rainfall is occurring with these storms, and may cause
localized flooding, especially in low lying areas. Do not drive your
vehicle through flooded roadways.

In addition to the heavy rain, wind gusts to 50 mph and half inch
hail are possible with the stronger storms.

Locations impacted include...
Stanley, New Town, Tioga, Powers Lake, Lignite, Columbus, Portal,
Ross, Battleview, Flaxton, Lostwood, White Earth, White Earth Bay
Recreation Area, Larson, Charlson, Northgate, Coteau and Mcgregor.

LAT...LON 4900 10225 4858 10231 4797 10245 4805 10301
      4863 10296 4863 10289 4864 10288 4872 10289
      4872 10294 4886 10294 4900 10283
TIME...MOT...LOC 2005Z 197DEG 42KT 4908 10246 4818 10274

HEINERT

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
437 PM CDT FRI JUN 1 2018

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

0429 PM     FUNNEL CLOUD     6 WSW GRASSY BUTTE      47.36N 103.37W
06/01/2018                   MCKENZIE           ND   STORM CHASER

            A STORM CHASER REPORTED A WELL DEFINED
            FUNNEL CLOUD APPROXIMATELY 6 WSW OF THE TOWN
            OF GRASSY BUTTE.

&&