URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 670
NWS Storm Prediction Center Norman OK
1255 PM MDT Thu Sep 12 2024

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Southeast Montana
  Northeast Wyoming

* Effective this Thursday afternoon and evening from 1255 PM
  until 700 PM MDT.

* Primary threats include...
  Scattered damaging winds likely with isolated significant gusts
    to 75 mph possible
  Scattered large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...At least widely scattered severe storms including
supercells will initially develop generally near the Montana/Wyoming
border vicinity this afternoon, spreading northeastward through the
afternoon.

The severe thunderstorm watch area is approximately along and 80
statute miles east and west of a line from 60 miles east southeast
of Worland WY to 25 miles north of Miles City MT. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).

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 450. Mean storm motion vector
22040.

...Guyer