Valid 110100Z – 111200Z
…THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE
NORTHERN ROCKIES/HIGH PLAINS AND THE CENTRAL HIGH PLAINS…
…SUMMARY…
Scattered severe thunderstorms will continue this evening across the
northern Rockies region into the central High Plains. Wind and hail
remain the primary threats.
…01z Update…
Scattered robust convection continues across the northern Rockies,
arcing east-southeast over southern MT into the Black Hills region.
This activity is partly driven by a weak short-wave trough that is
ejecting across western MT ahead of the main Pacific northwest
trough. Given the large-scale support, scattered severe
thunderstorms should focus along a corridor primarily across
southern MT into northeast WY through late evening.
Farther south across the central High Plains, scattered
thunderstorms developed within easterly low-level flow regime over
northeast CO/southwest NE. This activity is beginning to cluster and
an MCS may ultimately evolve over south-central NE/north-central KS
along nose of LLJ. Have adjusted severe probs to account for this
higher severe probability development.
..Darrow.. 08/11/2019
$$