Severe Weather Outlook

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Severe Weather Watches Overview

Watch data currently updates every 15 minutes.

Current severe weather watch map

Severe Thunderstorm Watch #0636 for Far Eastern Montana, Western North Dakota, Northwestern South Dakota, Far Northeastern Wyoming

Scattered damaging winds and isolated significant gusts to 75 mph possible
Isolated large hail events to 1.5 inches in diameter possible

Severe Thunderstorm Watch #0637 for Central North Dakota, North-Central South Dakota

Scattered damaging winds and isolated significant gusts to 75 mph likely
Isolated large hail events to 1.5 inches in diameter possible

↑ back to the list of watches ↑

Severe Thunderstorm Watch #0636

Locations Affected

Far Eastern Montana

Western North Dakota

Northwestern South Dakota

Far Northeastern Wyoming

Severe Thunderstorm Watch #0636 map

Severe Thunderstorm Watch Summary

Ongoing line of storms moving across northeast Montana has recently produced gusts over 60 mph. This line is expected to continue northeastward this afternoon. Additional thunderstorm development is anticipated across southeast Montana and adjacent far northeastern Wyoming. This activity is expected to gradually strengthen, potentially producing strong to severe wind gust from 65 to 80 mph as it moves eastward. Thunderstorm development is also possible along a cold front is western North Dakota. Large hail and strong gusts are possible with these storms.

Severe Weather Threats

Scattered damaging winds and isolated significant gusts to 75 mph possible

Isolated large hail events to 1.5 inches in diameter possible

Severe Thunderstorm Watch Details

SEL6

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 636
NWS Storm Prediction Center Norman OK
125 PM MDT Sun Aug 30 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Far Eastern Montana
  Western North Dakota
  Northwestern South Dakota
  Far Northeastern Wyoming

* Effective this Sunday afternoon and evening from 125 PM until
  900 PM MDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...Ongoing line of storms moving across northeast Montana has
recently produced gusts over 60 mph. This line is expected to
continue northeastward this afternoon. Additional thunderstorm
development is anticipated across southeast Montana and adjacent far
northeastern Wyoming. This activity is expected to gradually
strengthen, potentially producing strong to severe wind gust from 65
to 80 mph as it moves eastward. Thunderstorm development is also
possible along a cold front is western North Dakota. Large hail and
strong gusts are possible with these storms.

The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 40 miles north northeast
of Williston ND to 75 miles east of Gillette WY. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
24030.

...Mosier

↑ back to the list of watches ↑

Severe Thunderstorm Watch #0637

Locations Affected

Central North Dakota

North-Central South Dakota

Severe Thunderstorm Watch #0637 map

Severe Thunderstorm Watch Summary

A squall line will move east across the northern portion of the severe thunderstorm watch with a mix of cells and line segments farther south near the Dakotas' state border. The main threats with the stronger storms will be severe gusts 60 to 75 mph and perhaps isolated large hail with the stronger cores.

Severe Weather Threats

Scattered damaging winds and isolated significant gusts to 75 mph likely

Isolated large hail events to 1.5 inches in diameter possible

Severe Thunderstorm Watch Details

SEL7

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 637
NWS Storm Prediction Center Norman OK
440 PM CDT Sun Aug 30 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central North Dakota
  North-Central South Dakota

* Effective this Sunday afternoon and evening from 440 PM until
  1100 PM CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph likely
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...A squall line will move east across the northern portion
of the severe thunderstorm watch with a mix of cells and line
segments farther south near the Dakotas' state border.  The main
threats with the stronger storms will be severe gusts 60 to 75 mph
and perhaps isolated large hail with the stronger cores.

The severe thunderstorm watch area is approximately along and 50
statute miles east and west of a line from 55 miles north northeast
of Minot ND to 45 miles southwest of Mobridge SD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU7).

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 636...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25020.

...Smith

National Risk Overview

Sunday, August 30: TORNADO: 2%; HAIL: 5%; WIND: 15%
Monday, August 31: TORNADO: low; HAIL: 5%; WIND: 5%
Tuesday, September 1: ANY SEVERE: 15%
Wednesday, September 2: ANY SEVERE: 15%
Thursday, September 3: ANY SEVERE: 15%
Friday, September 4: ANY SEVERE: predictability too low
Saturday, September 5: ANY SEVERE: predictability too low
Sunday, September 6: ANY SEVERE: predictability too low

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