RSS Mesoscale Discussions from Storm Prediction Center
WW 285 SEVERE TSTM MT ND SD WY 072055Z - 080400Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 285
NWS Storm Prediction Center Norman OK
255 PM MDT Sun Jun 7 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeastern and Eastern Montana
Western and Central North Dakota
Western and Northwestern South Dakota
Northeastern Wyoming
* Effective this Sunday afternoon and evening from 255 PM until
1000 PM MDT.
...THIS IS A PARTICULARLY DANGEROUS SITUATION...
* Primary threats include...
Widespread damaging winds and scattered significant gusts to 100
mph likely
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...Severe thunderstorms are forecast to develop this
afternoon and intensify across western portions of the Watch. An
initial linear cluster of severe thunderstorms is forecast to evolve
into a bow echo as it matures and moves into the western Dakotas
this evening. A corresponding intensification of the severe-wind
threat is expected with widespread severe gusts expected and 80 to
100 mph gusts likely in localized swaths. Large to very large hail
may also occur with storms that can develop ahead of the squall
line. A tornado is possible with the squall line.
The severe thunderstorm watch area is approximately along and 125
statute miles north and south of a line from 15 miles north of
Sheridan WY to 55 miles north northeast of Bismarck ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU5).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 284...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 85 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
22050.
...Smith
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WW 0285 Status Updates
STATUS REPORT ON WW 285
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 WNW RAP
TO 20 W 2WX TO 25 NW Y22 TO 40 ENE DIK TO 45 WNW N60 TO 45 WNW
MOT TO 65 NW MOT TO 80 NE ISN.
..LYONS..06/08/26
ATTN...WFO...BYZ...GGW...BIS...UNR...ABR...
STATUS REPORT FOR WS 285
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NDC001-009-015-033-037-041-049-055-057-059-061-065-069-075-079-
083-085-101-080340-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BOTTINEAU BURLEIGH
GOLDEN VALLEY GRANT HETTINGER
MCHENRY MCLEAN MERCER
MORTON MOUNTRAIL OLIVER
PIERCE RENVILLE ROLETTE
SHERIDAN SIOUX WARD
SDC019-031-063-105-080340-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BUTTE CORSON HARDING
PERKINS
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
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WW 0284 Status Updates
STATUS REPORT ON WW 284
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 SSW HRO
TO 35 NW SGF TO 40 S SZL.
WW 284 WILL BE ALLOWED TO EXPIRE AT 080000Z.
..SUPINIE..06/07/26
ATTN...WFO...TSA...LZK...SGF...
STATUS REPORT FOR WT 284
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
ARC009-089-101-129-080000-
AR
. ARKANSAS COUNTIES INCLUDED ARE
BOONE MARION NEWTON
SEARCY
MOC043-059-077-085-167-209-213-225-080000-
MO
. MISSOURI COUNTIES INCLUDED ARE
CHRISTIAN DALLAS GREENE
HICKORY POLK STONE
TANEY WEBSTER
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
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MD 1022 CONCERNING SEVERE THUNDERSTORM WATCH 285... FOR PORTIONS OF CENTRAL NORTH DAKOTA AND NORTHERN SOUTH DAKOTA
Mesoscale Discussion 1022
NWS Storm Prediction Center Norman OK
1108 PM CDT Sun Jun 07 2026
Areas affected...portions of central North Dakota and northern South
Dakota
Concerning...Severe Thunderstorm Watch 285...
Valid 080408Z - 080545Z
The severe weather threat for Severe Thunderstorm Watch 285
continues.
SUMMARY...A few severe gusts remain possible tonight mainly over
north-central North Dakota. Convection is generally weakening and a
downstream watch appears unlikely.
DISCUSSION...Severe storms across WW285 have shown a decrease in
intensity over the last hour. This trend is likely to continue as
these storms move eastward into a less unstable air mass across ND.
Still, a few severe gusts are possible, mainly over portions of
north-central ND where the cold pool is the strongest. Thus some
severe risk will continue over WW285 which has been extended in time
to 0600z. A downstream watch is unlikely given the expected
weakening as the line moves into eastern ND.
Farther south, additional convective development across northwestern
SD is likely occurring behind the surface front/outflow from prior
convection. Recent reports of 50-55 mph gusts from SDDOT sensors
suggest some potential for isolated severe gusts through the
remainder of this evening and into the overnight hours. However,
increasing inhibition lends low confidence to any sustained severe
risk.
..Lyons/Gleason.. 06/08/2026
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...FGF...ABR...BIS...UNR...
LAT...LON 49050106 49079956 49089847 46699839 46069907 45160069
44960161 45000259 45510274 46000201 46940062 47440044
49050106
MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN
Read more
Public Severe Weather Outlook
PUBLIC SEVERE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0420 PM CDT SUN JUN 07 2026
...Severe thunderstorms expected over parts of the northern Plains
this afternoon and tonight...
* LOCATIONS...
Western and Central North Dakota
Eastern Montana
Western South Dakota
* HAZARDS...
Widespread hurricane-force damaging winds
A couple tornadoes
Isolated large hail up to baseball size
* SUMMARY...
A bow echo thunderstorm complex with widespread damaging winds
and significant severe gusts up to 100 mph appear likely over
parts of the northern Plains this afternoon and evening.
Scattered large hail and isolated tornadoes are also possible.
Preparedness actions...
Review your severe weather safety procedures for the possibility
of dangerous weather today. Stay tuned to NOAA Weather Radio,
weather.gov, or other media for watches and warnings. A watch
means that conditions are favorable for severe thunderstorms
over the next several hours. If a severe thunderstorm warning is
issued for your area, move to a place of safety, ideally in an
interior room on the lowest floor of a sturdy building.
&&
..Gleason.. 06/07/2026
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SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0800 PM CDT Sun Jun 07 2026
Valid 080100Z - 081200Z
...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
WESTERN NORTH DAKOTA AND FAR NORTHWESTERN SOUTH DAKOTA...
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTHWEST
AND SOUTH-CENTRAL MISSOURI...
...SUMMARY...
A line of severe thunderstorms with wind gusts potentially above 75
mph is expected over the northern High Plains this evening, with
large to very large hail and an isolated tornado threat also
possible. A couple of tornadoes and isolated damaging gusts are also
possible in the Ozarks.
...Northern High Plains...
At mid-levels, an upper-level trough is moving eastward into the
northern Rockies. Further east, a lead shortwave trough is evident
on water vapor imagery over the northern High Plains. At the
surface, a 994 mb low is located in northwestern North Dakota with a
surface trough extending southward into northwestern South Dakota. A
cold front is in far western North Dakota. To the east of the front,
surface dewpoints are mostly in the upper 50s and lower 60s F, and
moderate instability is in place. Numerous thunderstorms have
recently developed to the west of the instability axis, and these
storms are expected to organize into an intense line segment over
the next couple of hours.
RAP forecast soundings in western North Dakota ahead of the storms
have 0-6 km shear in the 40 to 55 knot range, with 850 to 500 mb
lapse rates between 7.5 and 8 C/km. In addition, surface
temperature-dewpoint spreads exceed 25 degrees F over much area.
This environment will be very favorable for severe wind gusts. The
greatest potential for severe gusts will be from far northwest South
Dakota northeastward into much of western and north-central North
Dakota. Along this corridor, a nearly continuous bowing line is
expected to organize. Severe wind gusts above 75 mph will be
possible with the more intense segments. In addition to the
wind-damage threat, large to very large hail will be possible over
the next couple hours with storms that obtain supercell structure. A
tornado or two could also occur.
...Ozarks...
A mid-level trough will move northeastward across the central U.S.
this evening. Ahead of the trough, a moist and unstable airmass is
in place from the southern and central Plains eastward into the
lower to mid Mississippi Valley. Scattered strong thunderstorms are
ongoing along an axis of moderate instability over the Ozarks of
southern and central Missouri, where the RAP has MLCAPE in the 1500
to 2000 J/kg range. Ahead of the mid-level trough, low-level flow is
forecast to become maximized in the Ozarks over the next couple of
hours. Forecast soundings near Springfield, Missouri by 03Z have 0-3
km storm-relative helicity around 180 m2/s2. This will support a
tornado threat. A few strong wind gusts will also be possible.
..Broyles.. 06/08/2026
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