Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 122
NWS Storm Prediction Center Norman OK
535 PM MDT Sat May 26 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
Western North Dakota
* Effective this Saturday afternoon and Sunday morning from 535
PM until 100 AM MDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...Isolated to scattered storms should initially develop
across parts of northeast Montana with a risk for severe hail and
locally strong gusts. This activity will likely develop into a
forward-moving cluster with embedded linear, bowing segments
potentially producing severe wind gusts later this evening across
parts of eastern Montana into western North Dakota.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 30 miles south
southwest of Glasgow MT to 30 miles east of Dickinson ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Grams
SEL2
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 122
NWS Storm Prediction Center Norman OK
535 PM MDT Sat May 26 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Montana
Western North Dakota
* Effective this Saturday afternoon and Sunday morning from 535
PM until 100 AM MDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
SUMMARY...Isolated to scattered storms should initially develop
across parts of northeast Montana with a risk for severe hail and
locally strong gusts. This activity will likely develop into a
forward-moving cluster with embedded linear, bowing segments
potentially producing severe wind gusts later this evening across
parts of eastern Montana into western North Dakota.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 30 miles south
southwest of Glasgow MT to 30 miles east of Dickinson ND. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU2).
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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
28035.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW2
WW 122 SEVERE TSTM MT ND 262335Z - 270700Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
30SSW GGW/GLASGOW MT/ - 30E DIK/DICKINSON ND/
..AVIATION COORDS.. 50NM N/S /26SSW GGW - 25E DIK/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 28035.
LAT...LON 48680687 47660216 45930216 46950687
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU2.
Watch 122 Status Report Messages:
STATUS REPORT #5 ON WW 122
VALID 270650Z - 270740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 N MLS TO
20 NNE GDV TO 30 ESE SDY TO 15 SSE ISN.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 536.
..PETERS..05/27/18
ATTN...WFO...GGW...BYZ...BIS...
&&
STATUS REPORT FOR WS 122
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC021-025-079-109-270740-
MT
. MONTANA COUNTIES INCLUDED ARE
DAWSON FALLON PRAIRIE
WIBAUX
$$
NDC001-007-011-025-033-041-053-087-089-270740-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BILLINGS BOWMAN
DUNN GOLDEN VALLEY HETTINGER
MCKENZIE SLOPE STARK
$$
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.
$$
STATUS REPORT #4 ON WW 122
VALID 270540Z - 270640Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 SSW GGW
TO 25 WNW SDY TO 20 WSW ISN.
..PETERS..05/27/18
ATTN...WFO...GGW...BYZ...BIS...
&&
STATUS REPORT FOR WS 122
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC021-025-033-055-079-083-109-270640-
MT
. MONTANA COUNTIES INCLUDED ARE
DAWSON FALLON GARFIELD
MCCONE PRAIRIE RICHLAND
WIBAUX
$$
NDC001-007-011-025-033-041-053-087-089-270640-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BILLINGS BOWMAN
DUNN GOLDEN VALLEY HETTINGER
MCKENZIE SLOPE STARK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 122
VALID 270450Z - 270540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SW GGW TO
15 W OLF TO 20 WNW ISN.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 535
..GUYER..05/27/18
ATTN...WFO...GGW...BYZ...BIS...
&&
STATUS REPORT FOR WS 122
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC021-025-033-055-079-083-085-105-109-270540-
MT
. MONTANA COUNTIES INCLUDED ARE
DAWSON FALLON GARFIELD
MCCONE PRAIRIE RICHLAND
ROOSEVELT VALLEY WIBAUX
$$
NDC001-007-011-025-033-041-053-087-089-270540-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BILLINGS BOWMAN
DUNN GOLDEN VALLEY HETTINGER
MCKENZIE SLOPE STARK
$$
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.
$$
STATUS REPORT #2 ON WW 122
VALID 270245Z - 270340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MARSH..05/27/18
ATTN...WFO...GGW...BYZ...BIS...
&&
STATUS REPORT FOR WS 122
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC021-025-033-055-079-083-085-105-109-270340-
MT
. MONTANA COUNTIES INCLUDED ARE
DAWSON FALLON GARFIELD
MCCONE PRAIRIE RICHLAND
ROOSEVELT VALLEY WIBAUX
$$
NDC001-007-011-025-033-041-053-087-089-270340-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BILLINGS BOWMAN
DUNN GOLDEN VALLEY HETTINGER
MCKENZIE SLOPE STARK
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 122
VALID 270125Z - 270240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MARSH..05/27/18
ATTN...WFO...GGW...BYZ...BIS...
&&
STATUS REPORT FOR WS 122
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MTC021-025-033-055-079-083-085-105-109-270240-
MT
. MONTANA COUNTIES INCLUDED ARE
DAWSON FALLON GARFIELD
MCCONE PRAIRIE RICHLAND
ROOSEVELT VALLEY WIBAUX
$$
NDC001-007-011-025-033-041-053-087-089-270240-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
ADAMS BILLINGS BOWMAN
DUNN GOLDEN VALLEY HETTINGER
MCKENZIE SLOPE STARK
$$
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.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (<5%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (40%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
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