Areas affected…northeast Wyoming…northern and western South
Dakota…and southern North Dakota
Concerning…Severe Thunderstorm Watch 667…
Valid 300411Z – 300615Z
The severe weather threat for Severe Thunderstorm Watch 667
continues.
SUMMARY…Local risk for large hail continues with isolated severe
storms.
DISCUSSION…Radar loop shows isolated thunderstorms — particularly
over the northwestern corner of South Dakota, advancing
northeastward with time. The storms are elevated above a
cool/stable boundary layer, north of a warm front near the Nebraska
Panhandle/South Dakota border.
Evening RAP RAOB, and area model forecast soundings, reveal
substantial elevated CAPE, while strong southwesterly flow aloft
remains supportive of supercells. Several reports of hail in excess
of severe thresholds have been received, with this risk likely to
continue into the overnight hours.
..Goss.. 09/30/2019
…Please see www.spc.noaa.gov for graphic product…
ATTN…WFO…FGF…ABR…BIS…UNR…
LAT…LON 43580410 44550440 45790200 46729899 46449783 45499742
44339991 43580410