Storm Prediction Center Severe Thunderstorm Watch 662

Note: 
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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   SEL2

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 662
   NWS Storm Prediction Center Norman OK
   555 PM MDT Sun Sep 6 2026

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Central and North-Central Montana

   * Effective this Sunday afternoon and Monday morning from 555 PM
     until 100 AM MDT.

   * Primary threats include...
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible
     Scattered damaging wind gusts to 70 mph possible

   SUMMARY...Widely scattered to scattered thunderstorms are forecast
   to continue to develop and intensify this evening.  The stronger
   storms will be capable of a risk for large hail (1 to 2 inches in
   diameter) and severe gusts (60 to 70 mph).

   The severe thunderstorm watch area is approximately along and 75
   statute miles east and west of a line from 35 miles northeast of
   Havre MT to 30 miles east southeast of Helena MT. 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.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 660...WW 661...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 450. Mean storm motion vector
   25025.

   ...Smith

Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.

   SAW2 
   WW 662 SEVERE TSTM MT 062355Z - 070700Z
   AXIS..75 STATUTE MILES EAST AND WEST OF LINE..
   35NE HVR/HAVRE MT/ - 30ESE HLN/HELENA MT/
   ..AVIATION COORDS.. 65NM E/W /31NE HVR - 24ESE HLN/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25025.

   LAT...LON 48900757 46420984 46421299 48901088

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU2.

Watch 662 Status Report Message has not been issued yet.

Note:
 Click for Complete Product Text.

Tornadoes

Wind

Hail

Combined Severe Hail/Wind

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% (EF2-EF5 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.