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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 318
NWS Storm Prediction Center Norman OK
245 PM MDT Mon Jun 12 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
South Central Montana
* Effective this Monday afternoon and evening from 245 PM until
1000 PM MDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Scattered strong to severe thunderstorms are expected to
develop and spread across the watch area this afternoon and evening.
Large hail and damaging winds will be possible in the strongest
cells, along with the potential of an isolated tornado.
The severe thunderstorm watch area is approximately along and 80
statute miles north and south of a line from 15 miles north
northwest of Livingston MT to 55 miles north northeast of Casper WY.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU8).
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
OTHER WATCH INFORMATION...CONTINUE...WW 316...WW 317...
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 400. Mean storm motion vector