Tornado Warning 18, NWS Bismarck, ND

190 
WWUS53 KBIS 070030
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
730 PM CDT Sun Sep 6 2026

NDC053-070100-
/O.CON.KBIS.TO.W.0018.000000T0000Z-260907T0100Z/
McKenzie ND-
730 PM CDT Sun Sep 6 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 8 PM CDT FOR CENTRAL
MCKENZIE COUNTY...

At 730 PM CDT, a severe thunderstorm capable of producing a tornado
was located 7 miles north of Theodore Roosevelt National Park North
Unit, or 8 miles south of Watford City, moving east at 20 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed. Damage
         to roofs, windows and vehicles will occur. Tree damage is
         likely.

Locations impacted include...
  Mainly rural areas of Central McKenzie County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.

&&

LAT...LON 4763 10343 4774 10345 4777 10318 4763 10312
TIME...MOT...LOC 0020Z 268DEG 15KT 4769 10338

TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN

$$

Johnson

178 
WWUS53 KBIS 070043
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
743 PM CDT Sun Sep 6 2026

NDC053-070100-
/O.CON.KBIS.TO.W.0018.000000T0000Z-260907T0100Z/
McKenzie ND-
743 PM CDT Sun Sep 6 2026

...TORNADO WARNING REMAINS IN EFFECT UNTIL 8 PM CDT FOR SOUTHEASTERN
MCKENZIE COUNTY...

At 743 PM CDT, a severe thunderstorm capable of producing a tornado
was located 8 miles northeast of Theodore Roosevelt National Park
North Unit, or 12 miles southeast of Watford City, moving east at 25
mph.

HAZARD...Tornado and tennis ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed. Damage
         to roofs, windows and vehicles will occur. Tree damage is
         likely.

Locations impacted include...
  Mainly rural areas of Southeastern McKenzie County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a well-built building
away from windows. If you are outdoors, in a mobile home, or in a
vehicle, move to the closest substantial shelter and protect yourself
from flying debris.

&&

LAT...LON 4763 10323 4771 10325 4772 10316 4763 10312
TIME...MOT...LOC 0030Z 275DEG 22KT 4767 10324

TORNADO...RADAR INDICATED
MAX HAIL SIZE...2.50 IN

$$

Johnson

Area Forecast Discussion
National Weather Service Bismarck ND
716 PM CDT Sun Sep 6 2026

.KEY MESSAGES...

- Moderate to high chances for showers and thunderstorms will
  remain tonight through Labor Day. Isolated to scattered severe
  thunderstorms are possible.

- Unseasonably warm and humid through the Labor Day, then
  trending cooler.

- Windy on Tuesday, with near-critical to critical fire weather
  conditions across southwest and south central North Dakota.

&&

.UPDATE...
Issued at 716 PM CDT Sun Sep 6 2026

A large supercell continues in McKenzie County and is likely
producing hail larger than golf balls at times, otherwise most
thunderstorm activity has ended over the forecast area for the
meantime. 0Z sounding at KBIS shows a stout cap after convection
from earlier today, which along with the SPC mesoanalysis page
indicates further initiation unlikely in the south central this
evening. Thunderstorm development remains possible in the
southwest this evening, though increasing CIN appears to be
winning out. Despite this, increasing LLJ, WAA, and a strong
shortwave will likely bring another round of showers and
thunderstorms initially tonight and through much of the day
Monday.

&&

.DISCUSSION...
Issued at 332 PM CDT Sun Sep 6 2026

A general unsettled pattern to bring isolated to scattered
thunderstorms, possibly severe, through tonight. High amounts of
instability, mostly elevated, will continue through tonight.
Meanwhile a weak pseudo warm front near a developing low will
be draped across much of the state through tonight. Aloft sees
falling heights as the upper level ridge moves east and
southwest flow takes its place. Models also indicate a low level
jet may return this evening through tonight. All this combined
will return widespread chances for showers and thunderstorms
through tonight. Today's storms have left plenty of remnant
boundaries across the state, How these interact with each other
could influence severe weather tonight as well. Overall the
stronger severe weather will be located to anywhere with higher
shear which currently analyzed in the north and west. Elsewhere
has less shear, although high amounts of instability may be just
enough for stronger pulse like storms. Overall a hail threat up
to golf ball size will be possible with any stronger storm
through tonight, with rotating storms in the higher sheared
areas having the better potential for the bigger hail. The wind
threat is modest through tonight. DCAPE is high, although 0 to 3
km shear is lacking as are low level lapse rates. Thus winds 60
to perhaps 70 mph are possible. There still remains a low
tornado threat through tonight. This is highly dependent on
boundary interactions, although there is some increased SRH and
0 to 1 KM shear through tonight. Of note are some increased non
supercell parameters through this evening. Overall confidence in
surface based storms through tonight is low, yet a tornado is
possible along any boundary interactions. High pwats over 1.5
inches will continue to bring a heavy rain and localized
flooding threat. If confidence in any one area for heavy rain
increase then perhaps a flood watch may be needed tonight and
perhaps again on Monday. Otherwise look for mild lows in the 60s
tonight. Patchy fog may also return tonight to areas without
thunderstorms and some clearing. Confidence was not high enough
to include fog at this time.

Surface low then moves across the state on Labor Day bringing
more isolated to scattered severe thunderstorms. Timing wise,
severe storms could be ongoing in the morning as a low level jet
continues ahead of the low in the morning. As the low pushes
through following by a cold front, thunderstorms could continue
through the day from west to east through the day. A few
thunderstorms could then develop along a trailing front tomorrow
evening, although this may be more uncertain depending how much
the daytime convection impacts the atmosphere. All hazards
remain possible. Increased shear and instability will support
large hail to golf ball sized. Meanwhile, the potential for line
development could bring strong winds to 70 mph. There also
remains a conditional tornado threat for Monday as dewpoints
remain high and a weak warm front lifts ahead of the low.
Storms would have to be surface based to increase the tornado
threat. Currently SPC has a Marginal Risk for severe weather.
CSU-MLP severe outlooks shown all threats possible for Monday.
Thus anyone with outdoor plans for Monday should continue to be
weather aware on Monday. Highs for Labor Day will continue to be
warm with 80s for most of the area, and 70s north. Breezy
southerly winds will be found until a breezy westerly wind moves
in behind the low. Precipitation diminishes Monday night, with
lows cooling in the 50s to near 60.

The main concern for Tuesday remains strong winds. Both the NBM
and ECMWF EFI support advisory criteria winds of sustained
speeds between 30 and 40 mph and gusts of 45 to 55 mph. Tuesday
will be much cooler with highs from the upper 60s northwest to
lower 80s southeast, but also drier with minimum humidity
falling to around 25 to 35 percent. The combination of strong
winds and lower RH will likely bring near- critical to critical fire
weather conditions to all of southwest and some south central
North Dakota, with critical conditions especially possible in
the far southwest where RH could fall closer to 20 to 25
percent. A few showers may also be found Tuesday, mainly in the
north. Cooler temperatures remain in the forecast on Wednesday,
but with winds not nearly as strong yet still breezy at times.
Ensembles have now trended toward a quick warmup on Thursday due
to a transient ridge, followed by a distinct cooling trend
heading into next weekend, but with increasing spread due to
synoptic scale wave phasing uncertainty. There could be an
increased fire weather threat on Thursday, especially in the
southwest. Limited chances for precipitation also look to be
Wednesday through Friday.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 716 PM CDT Sun Sep 6 2026

Scattered showers and thunderstorms are expected at times
through the period and all terminals may be impacted. A few
storms may be severe with large hail, torrential rain, and
erratic winds. Coverage through the remainder of this evening
will likely be limited. However, the next wave may develop in
western and possibly north central North Dakota overnight before
moving east across the state on Monday. In addition, MVFR/IFR
ceilings are expected along, north, and east of the Missouri
River Monday morning.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
None.

&&

UPDATE...Telken
DISCUSSION...Anglin
AVIATION...Telken

Hazardous Weather Outlook
National Weather Service Bismarck ND
646 PM CDT Sun Sep 6 2026

NDZ001>005-009-010-012-013-017>020-022-023-025-031>033-035>037-
040>044-046>048-050-051-055>062-080000-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-
McHenry-Pierce-McKenzie-Dunn-Mercer-Oliver-Sheridan-Wells-Foster-
Golden Valley-Billings-Stark-Burleigh-Kidder-Stutsman-Slope-
Hettinger-Grant-Bowman-Adams-Emmons-Logan-La Moure-McIntosh-
Dickey-Northwest Ward-Central and Southern Ward/Minot Area-
Western McLean-Eastern McLean-Western Morton-Eastern Morton-
Western Sioux-Eastern Sioux-
646 PM CDT Sun Sep 6 2026 /546 PM MDT Sun Sep 6 2026/

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...Tonight

Isolated to scattered thunderstorms are possible through tonight.
A few storms may be severe, mainly during this evening. Potential
hazards include large hail up to golf ball size, damaging winds
up to 70 mph, torrential rain, and perhaps a tornado.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Isolated severe thunderstorms are possible on Labor Day. Potential
hazards include large hail up to golf ball size, damaging winds up
to 70 mph, torrential rain, and perhaps a tornado.

Strong west winds are likely on Tuesday, with near-critical fire
weather conditions possible in southwest and south central parts
of the state, and critical fire weather conditions possible in
the far southwest.

.SPOTTER INFORMATION STATEMENT...

Spotters are asked to provide reports to the NWS using standard
procedures, including through our social media accounts.

Telken

Special Weather Statement
National Weather Service Bismarck ND
150 PM CDT Sun Sep 6 2026

NDZ004-005-013-061930-
Pierce ND-Rolette ND-Bottineau ND-
150 PM CDT Sun Sep 6 2026

...A STRONG THUNDERSTORM WILL IMPACT ROLETTE...NORTHEASTERN PIERCE
AND NORTHEASTERN BOTTINEAU COUNTIES UNTIL 230 PM CDT...

At 150 PM CDT, Doppler radar was tracking a strong thunderstorm 8
miles south of Dunseith, or 19 miles southeast of Bottineau, moving
northeast at 45 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Rolla, Dunseith, Rolette, St. John, Belcourt, International Peace
  Garden, Shell Valley, Mylo, Overly, Thorne, Turtle Mountain,
  Nanson, Butte St. Paul State Recreation Area, Homen State Forest
  and Agate.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4900 10018 4900 9953 4872 9953 4872 9949
      4853 9949 4852 10010 4878 10044 4900 10022
TIME...MOT...LOC 1849Z 226DEG 38KT 4869 10008

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Telken

Special Weather Statement
National Weather Service Bismarck ND
214 PM CDT Sun Sep 6 2026

NDZ036-037-062000-
Stutsman ND-Kidder ND-
214 PM CDT Sun Sep 6 2026

...A STRONG THUNDERSTORM WILL IMPACT KIDDER AND SOUTHWESTERN STUTSMAN
COUNTIES UNTIL 3 PM CDT...

At 214 PM CDT, Doppler radar was tracking a strong thunderstorm near
Steele, or 44 miles east of Bismarck, moving northeast at 25 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Steele, Medina, Tappen, Pettibone, Dawson, Robinson, Lake Isabel,
  Crystal Springs, Lake Williams, Chase Lake, Horsehead Lake and
  Streeter Memorial.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4663 9980 4672 10008 4696 10008 4726 9979
      4697 9917 4663 9945
TIME...MOT...LOC 1914Z 216DEG 19KT 4685 9985

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH

Telken

Special Weather Statement
National Weather Service Bismarck ND
254 PM CDT Sun Sep 6 2026

NDZ023-036-037-062030-
Stutsman ND-Wells ND-Kidder ND-
254 PM CDT Sun Sep 6 2026

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN WELLS...
NORTHEASTERN KIDDER AND NORTHWESTERN STUTSMAN COUNTIES UNTIL 330 PM
CDT...

At 254 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles north of Pettibone, or 24 miles southwest of Carrington, moving
northeast at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Sykeston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4733 9964 4750 9943 4737 9927 4733 9927
      4733 9922 4720 9906 4714 9952 4727 9971
TIME...MOT...LOC 1954Z 247DEG 22KT 4726 9956

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 TO 55 MPH

Telken

Special Weather Statement
National Weather Service Bismarck ND
256 PM CDT Sun Sep 6 2026

NDZ037-062030-
Stutsman ND-
256 PM CDT Sun Sep 6 2026

...A STRONG THUNDERSTORM WILL IMPACT CENTRAL STUTSMAN COUNTY UNTIL
330 PM CDT...

At 256 PM CDT, Doppler radar was tracking a strong thunderstorm 10
miles southwest of Pingree, or 18 miles northwest of Jamestown,
moving northeast at 25 mph.

HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Buchanan, Cleveland and Pingree.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

Torrential rainfall is also occurring with this storm and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4689 9912 4703 9932 4726 9894 4706 9873
TIME...MOT...LOC 1956Z 247DEG 22KT 4704 9902

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 TO 55 MPH

Telken