Day 1 Severe Weather Outlook

Valid 061630Z – 071200Z

…THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE NORTHERN INTERMOUNTAIN REGION AND NORTHERN/CENTRAL ROCKIES…

…SUMMARY…
Isolated severe thunderstorm winds and hail are possible this
afternoon and evening over parts of the northern Intermountain
region, northern/central Rockies and adjacent High Plains.

…ID/MT/WY…
Morning water vapor imagery shows a well-defined shortwave trough
moving across OR and northern CA. This feature will affect parts of
ID/western MT/western WY this afternoon. Broken cloud cover will
result in pockets of destabilization, with dewpoints in the 50s
yielding afternoon MLCAPE values of 500-1000 J/kg. Morning CAM
solutions suggest a few clusters of occasionally organized storms
are possible, with gusty winds and hail possible in the strongest
cells. Will maintain ongoing MRGL risk, but will monitor for the
development of bowing structures later today and the potential for
an upgrade.

…CO/WY…
A large upper ridge is present today over the southern Rockies, with
weak to moderately strong midlevel westerly flow from northern CO
into WY. It appears likely that scattered afternoon thunderstorms
will form in the foothills of north-central CO into southern WY,
with slow eastward movement of storms into the adjacent plains this
evening. A few of the storms may pose a risk of hail and gusty
winds. Organized severe storms are not currently anticipated.

..Hart/Wendt.. 09/06/2019

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