Severe Thunderstorm Warning 13, NWS Bismarck, ND

425 
WWUS53 KBIS 030251
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
951 PM CDT Tue Jun 2 2026

NDC011-030301-
/O.CAN.KBIS.SV.W.0013.000000T0000Z-260603T0330Z/
Bowman ND-
851 PM MDT Tue Jun 2 2026

...SEVERE THUNDERSTORM WARNING IS CANCELLED FOR NORTHERN BOWMAN
COUNTY...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

&&

LAT...LON 4628 10318 4628 10373 4635 10380 4659 10338
TIME...MOT...LOC 0230Z 235DEG 23KT 4621 10375

$$


NDC087-030330-
/O.CON.KBIS.SV.W.0013.000000T0000Z-260603T0330Z/
Slope ND-
851 PM MDT Tue Jun 2 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT FOR
CENTRAL SLOPE COUNTY...

At 851 PM MDT, a severe thunderstorm was located 9 miles north of
Rhame, or 15 miles northwest of Bowman, moving northeast at 25 mph.

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...
  Amidon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.

&&

LAT...LON 4628 10318 4628 10373 4635 10380 4659 10338
TIME...MOT...LOC 0230Z 238DEG 21KT 4629 10375

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Adam

284 
WWUS53 KBIS 030310
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
1010 PM CDT Tue Jun 2 2026

NDC087-030330-
/O.CON.KBIS.SV.W.0013.000000T0000Z-260603T0330Z/
Slope ND-
910 PM MDT Tue Jun 2 2026

...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM MDT FOR
CENTRAL SLOPE COUNTY...

At 910 PM MDT, a severe thunderstorm was located 7 miles southwest of
Amidon, or 18 miles north of Bowman, moving northeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
         roofs, siding, and trees.

Locations impacted include...
  Amidon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.

&&

LAT...LON 4636 10323 4635 10355 4645 10362 4659 10338
TIME...MOT...LOC 0251Z 237DEG 19KT 4639 10357

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Adam

435 
WWUS53 KBIS 030322
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
1022 PM CDT Tue Jun 2 2026

NDC087-030332-
/O.EXP.KBIS.SV.W.0013.000000T0000Z-260603T0330Z/
Slope ND-
922 PM MDT Tue Jun 2 2026

...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 930 PM MDT FOR CENTRAL
SLOPE COUNTY...

The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

&&

LAT...LON 4636 10323 4635 10355 4645 10362 4659 10338
TIME...MOT...LOC 0310Z 237DEG 19KT 4644 10345

$$

Adam

Area Forecast Discussion
National Weather Service Bismarck ND
701 PM CDT Tue Jun 2 2026

.KEY MESSAGES...

- Isolated to scattered severe thunderstorms expected over much
  of western and central North Dakota through this evening.

- Isolated to scattered severe thunderstorms possible over
  central into eastern North Dakota on Wednesday.

- Low to medium chances of showers and thunderstorms Thursday
  through the remainder of the week.

- Highs in the 70s and 80s through the workweek, warming into
  the 80s and lower 90s for the weekend.

&&

.UPDATE...
Issued at 700 PM CDT Tue Jun 2 2026

** MESOSCALE DISCUSSION **

Thunderstorms have formed along the pre-frontal wind shift/
differential mixing boundary from near Fessenden southward
to the Pettibone, Tappen, Napoleon, Wishek, and Ashley areas.
In this area, capping has been eroded in the absence of the high
clouds that have resulted in more MLCIN further west. There is
large bouyancy with MLCAPE around 2000 J/kg, but effective shear
is generally less than 30 kt, and those vectors are oriented
parallel to the wind shift. This means that we have seen and
will continue to expect multicell, pulse-type storms along this
axis, with a marginal risk of hail to around half dollar size
and damaging wind gusts up to 60 mph. Note that given the weak
shear environment, hail diagnostic tools such as MRMS and
single-radar MESH will tend to overestimate hail sizes with
these storms.

Further west, storms along/ahead of the cold front, e.g., in
Sioux County, have struggled to become established in the face
of larger MLCIN. Similarly, post-frontal convection, such as
that near Glen Ullin and Center as of 00 UTC, has also been
struggling to intensify. These areas of convection represent
only a low risk of intensification and severe-storm risk for
the remainder of the evening. As observational trends allow,
we will cancel western and northern portions of the Severe
Thunderstorm Watch early in collaboration with SPC.

CJS

UPDATE
Issued at 410 PM CDT Tue Jun 2 2026

** MESOSCALE DISCUSSION **

A severe hail and wind risk will continue across central ND the
next several hours, with only a low tornado risk. In this
scenario, the main hazards will be from large hail and damaging
winds, which is why a Severe Thunderstorm Watch has been issued.

Technical discussion: As of 21z, thunderstorms including some
previous marginal supercell structures are focused in the
McHenry, Pierce, and Sheridan County areas. This is along a pre-
frontal trough, and possibly where the cold frontal zone has
begun to merge with that trough, resulting in additional low-
level convergence. MLCAPE on the order of 2000 J/kg and
effective-layer shear on the order of 35-40 kt in that zone
favor the marginal supercell structures with an attendant large
hail and damaging wind risk. However, anvil-level flow does
weaken with northward extent, and the orientation of deep-layer
shear vectors to the surface boundaries suggests gradual upscale
growth will occur in this area if or when additional initiation
occurs.

Further southwest, the prefrontal surface trough is seen on
radar fine-line from near Mercer to Price, Crown Butte Lake,
and Carson. The 18z KBIS RAOB sampled residual capping with
MLCIN around -50 J/kg. As surface temperatures reach the mid
80s F, that capping becomes minimized, but high-level clouds
spreading across Grant, Morton, and into Burleigh Counties
casts some doubt on the timing of convective initiation. We
believe that eventually additional development will occur
in south central ND, but robust development may take some
time and additional frontal lift to overcome the residual
capping layer. The highest probability of development may
initially be over Sioux and southern Grant Counties, where
satellite trends suggest more robust upstream development
occurring in an area where downstream high-cloud shading is
less prevalent.

There is also a low to medium probability that the line of
cumulus from Kidder south into Emmons Counties, on the edge of
richer low-level moisture representing a differential heating
boundary, could result in pre-frontal initiation. However, deep-
layer shear is weaker there and would result in more marginal,
multicellular type of storms.

Generally-speaking, low-level hodographs are relatively small,
and accordingly, low-level SRH ahead of the front in the buoyant
sector is 100 m2/s2 or less. Deep-layer shear vectors are also
oriented parallel to the front, favoring upscale-growing and
messy modes. This all suggests that the tornado risk is low
overall.

CJS

&&

.DISCUSSION...
Issued at 151 PM CDT Tue Jun 2 2026

Relatively well stacked low pressure is present over southern
Saskatchewan. This low will very gradually slide eastward over the
next couple days. During this timeframe, an associated very
slow moving cold frontal boundary currently draped north to
south over western North Dakota will slide eastward. This
frontal boundary will likely become quasistationary, and
possibly retrograde, at times. Showers and thunderstorms are
present and will continue to frequently develop along and ahead
of this frontal boundary.

High pressure over the Great Lakes region will continue advecting
moisture from the Gulf of America into the Northern Plains. This
added moisture, with boundary layer dewpoints in the mid 50s to low
60s will help produce a buoyant atmosphere. In addition, deep
layer shear along and ahead of the front is generally progged at
around 35 to 45 kts with a southwesterly component. Combined,
this should produce the conditions for isolated to scattered
severe thunderstorms this afternoon and evening. With the
southwesterly component of the 0 to 6 km bulk shear vectors and
a north to south frontal boundary, suspect clusters are the most
likely thunderstorm mode along most of the front. Considering
there is already a clusterish line of showers and thunderstorms
along the frontal boundary, suspect a limited timeframe for any
discrete cells to develop this afternoon. Though one has
already developed near the Turtle Mountains as of this writing.
This means that while there may be a window for golf ball size
hail and an isolated tornado threat, this may wind up being a
case where widespread marginal severe thunderstorms prevail
overall. In addition, slow moving storm motions with the
potential for training could lead to heavy rain and a localized
flooding event.

Of note, a mesoanalyst will produce a mesoanalysis discussion
within the next hour or two. This will provide even further
details in regard to the severe weather threat based on the
evolving severe weather environment. Depending on how the
environment evolves, changes to the above threat expectations
are not out of the question.

While there may be initial LLJ development this evening mainly
over the eastern half of the state, it does not look to persist
through the night. Therefore, while isolated to scattered
showers and thunderstorms are likely to persist through at least
parts of the area through tonight, the severe threat will
likely wane rapidly as the sun sets, instability decreases, and
capping increases. Still, a few strong storms are not entirely
out of the question overnight.

For Wednesday, the aforementioned frontal boundary will continue to
gradually shift eastward and as such, so will the severe threat.
Therefore, concur with SPC that the highest severe potential for
Wednesday will be in the south central (mainly east of Hwy 83)
and in eastern North Dakota. The biggest threats will remain
strong winds and large hail, though an isolated tornado threat
could return mainly in the far southeast, including the southern
James River Valley of ND.

Gulf moisture will be, at least temporarily, cut off behind the
frontal boundary. However, a deepening low pressure over the
Central Plains could bring the return of showers and
thunderstorms mainly to southern North Dakota Thursday through
Friday. The severe threat is favored to remain south for the
most part at this time, though will keep an eye on that over the
next couple days. Saturday is favored to remain mostly dry,
after which periodic showers and thunderstorms are possible to
start next week. CSU machine learning suggests at least low
severe weather potential most days to start next week.

Slightly above average temperatures with highs in the mid 70s to
low 80s are expected to continue through Friday. Well above
average temperatures are then expected to return this weekend
and are favored to continue into the middle of next week. Lows
will start out mostly in the mid 40s to low 50s before
increasing to the 50s to low 60s next week.

&&

.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 641 PM CDT Tue Jun 2 2026

Showers and thunderstorms continue along a cold frontal boundary
that is draped across central North Dakota from just east of
KBIS northeastward to just east of Langdon. Near this front,
expect the potential for additional SHRAs/TSRAs...some of which
could be severe...to impact potentially KJMS amd KBIS over the
next few hours with MVFR of lower CIGS/VSBYS. SHRA/TSRA activity
is then expected to shift east with the cold front as it
expands in coverage through around 03/06Z...with additional
SHRAs/TSRAs rotating around the upper level low across southern
Saskatchewan impacting the western terminals overnight and
working its way eastward during the daytime hours Wednesday.
Overall, an unsettled period with low confidence in timing of
TSRA activity and therefore limited lower CIGS/VSBYs to mainly
prob30 groups.

&&

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

&&

UPDATE...CJS
DISCUSSION...Telken
AVIATION...Rossi

Hazardous Weather Outlook
National Weather Service Bismarck ND
206 PM CDT Tue Jun 2 2026

NDZ001>003-009-010-017>019-031>033-040-041-043-044-055>057-031915-
Divide-Burke-Renville-Williams-Mountrail-McKenzie-Dunn-Mercer-
Golden Valley-Billings-Stark-Slope-Hettinger-Bowman-Adams-
Northwest Ward-Central and Southern Ward/Minot Area-
Western McLean-
206 PM CDT Tue Jun 2 2026 /106 PM MDT Tue Jun 2 2026/

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

.DAY ONE...This Afternoon and Tonight

Isolated to scattered severe thunderstorms are expected today
through this evening. The main hazards will be large hail up to
golf ball size and damaging wind gusts up to 70 mph. Isolated
tornadoes and very heavy rainfall producing localized flooding
are also possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

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

NDZ004-005-012-013-020-022-023-025-035>037-042-046>048-050-051-
058>062-031915-
Bottineau-Rolette-McHenry-Pierce-Oliver-Sheridan-Wells-Foster-
Burleigh-Kidder-Stutsman-Grant-Emmons-Logan-La Moure-McIntosh-
Dickey-Eastern McLean-Western Morton-Eastern Morton-Western Sioux-
Eastern Sioux-
206 PM CDT Tue Jun 2 2026 /106 PM MDT Tue Jun 2 2026/

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

.DAY ONE...This Afternoon and Tonight

Isolated to scattered severe thunderstorms are expected today
through this evening. The main hazards will be large hail up to
golf ball size and damaging wind gusts up to 70 mph. Isolated
tornadoes and very heavy rainfall producing localized flooding
are also possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Isolated to scattered severe thunderstorms are possible
Wednesday. The main hazards will be large hail up to golf ball
size and damaging wind gusts up to 60 mph. Isolated tornadoes are
possible mainly in the far southeast. Very heavy rainfall
producing localized flooding is also possible.

.SPOTTER INFORMATION STATEMENT...

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

Telken

Preliminary Local Storm Report
National Weather Service Bismarck ND
818 PM CDT Tue Jun 2 2026

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

0813 PM     Tstm Wnd Gst     4 W Pingree             47.17N 98.99W
06/02/2026  M61 MPH          Stutsman           ND   Public

            Measured wind gust from private weather
            station.

&&

MEJ

Preliminary Local Storm Report
National Weather Service Bismarck ND
820 PM CDT Tue Jun 2 2026

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

0550 PM     Hail             Robinson                47.14N 99.78W
06/02/2026  E1.00 Inch       Kidder             ND   Broadcast Media

            Photo relayed from broadcast media of up to
            quarter sized hail lasting about 10 minutes
            in Robinson.

&&

JAA

Preliminary Local Storm Report
National Weather Service Bismarck ND
824 PM CDT Tue Jun 2 2026

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

0709 PM     Tstm Wnd Gst     1 E Pettibone           47.12N 99.49W
06/02/2026  M62 MPH          Kidder             ND   Public

            Measured wind gust from private weather
            station.

&&

MEJ

Preliminary Local Storm Report
National Weather Service Bismarck ND
833 PM CDT Tue Jun 2 2026

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

0830 PM     Tstm Wnd Gst     3 WNW Kensal            47.31N 98.79W
06/02/2026  M59 MPH          Stutsman           ND   Public

            Measured wind gust at private weather
            station.

&&

MEJ

Preliminary Local Storm Report
National Weather Service Bismarck ND
835 PM CDT Tue Jun 2 2026

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

0830 PM     Tstm Wnd Gst     5 W Courtenay           47.22N 98.68W
06/02/2026  M58 MPH          Stutsman           ND   Mesonet

            10 meter measured wind gust at 5 W Courtenay
            NDAWN station.

&&

MEJ

Special Weather Statement
National Weather Service Bismarck ND
900 PM CDT Tue Jun 2 2026

NDZ043-030230-
Bowman ND-
800 PM MDT Tue Jun 2 2026

...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN BOWMAN COUNTY UNTIL
830 PM MDT...

At 800 PM MDT, Doppler radar was tracking a strong thunderstorm 10
miles northwest of Mud Buttes, or 26 miles west of Bowman, moving
east at 30 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
  Rhame and Sunset Butte.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4602 10404 4613 10405 4621 10405 4628 10368
      4606 10358
TIME...MOT...LOC 0159Z 248DEG 27KT 4610 10394

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

CJS