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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 490
NWS Storm Prediction Center Norman OK
110 PM MDT Fri Jul 5 2019
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Extreme southeastern Montana
The western Nebraska Panhandle
Western South Dakota
* Effective this Friday afternoon and evening from 110 PM until
900 PM MDT.
* Primary threats include...
Scattered large hail likely with isolated very large hail events
to 2.5 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Scattered severe thunderstorms are expected to form this
afternoon from southeastern Montana across eastern Wyoming, and then
move east-southeastward into western South Dakota and the western
Nebraska Panhandle through late evening. Supercells are probable
initially with isolated very large hail possible, while storms may
cluster into this evening with an attendant threat for damaging
winds. An isolated, brief tornado cannot be ruled out with the
initial discrete supercells.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 110 miles north northwest
of Rapid City SD to 30 miles east southeast of Cheyenne WY. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU0).
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
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector