ACUS01 KWNS 250055
SPC AC 250053
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0753 PM CDT Mon Jul 24 2017
Valid 250100Z - 251200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER THE COASTAL
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER A PORTION
OF WESTERN NORTH DAKOTA...
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM SOUTH
CENTRAL SOUTH DAKOTA THROUGH WESTERN NEBRASKA...
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM WESTERN
NEVADA THROUGH SOUTHEAST OREGON...
A few severe storms with damaging wind gusts will persist over the
coastal Mid Atlantic through about 02-03Z before weakening and
moving offshore. Other isolated storms with a threat for mainly
downburst winds will persist through mid evening over a portion of
the Dakotas as well as parts of Oregon and Nevada.
...Coastal Mid Atlantic area...
Line of strong to severe storms with damaging wind the main threat
persists from central NJ through northern MD. Radar and satellite
data show a boundary moving southwestward through NJ with more
stable air spreading inland. This along with onset of nocturnal
cooling suggest severe threat should be relatively short lived and a
weakening trend is expected by 02-03Z.
Isolated storms will continue developing next couple hours along
southeast-advancing cold front over western ND as well as along a
lee trough from western NE through south Central SD. Isolated
downburst winds may occur with the stronger storms, but increasing
convective inhibition associated with a stabilizing boundary layer
should contribute to a diminishing trend by 03Z.
...Southeast Oregon through western Nevada...
Isolated high-based storms will persist through mid evening in
association with plume of subtropical moisture spreading northward
ahead of a closed upper low circulation. Inverted-V boundary layers
will promote a risk for a few downburst winds before activity
diminishes with loss of diabatic heating.