Storm Prediction Center Severe Thunderstorm Watch 447
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SEL7
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 447
NWS Storm Prediction Center Norman OK
250 PM MDT Fri Jun 20 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southeast Montana
Southwest North Dakota
Northwest South Dakota
* Effective this Friday afternoon and evening from 250 PM until
900 PM MDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 3
inches in diameter likely
Scattered damaging wind gusts to 70 mph likely
A tornado or two possible
SUMMARY...Thunderstorms are expected to rapidly develop this
afternoon over southeast Montana and track eastward through the
early evening. Supercells capable of very large hail and damaging
winds appear to be the main concern. A tornado or two is also
possible.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 40 miles north
northwest of Broadus MT to 85 miles northeast of Lemmon 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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26030.
...Hart
2025-06-20 20:50:02
