SPC MD 930



MD 0930 CONCERNING SEVERE THUNDERSTORM WATCH 283… FOR NORTH-CENTRAL NEBRASKA…PORTIONS OF CENTRAL AND EASTERN SOUTH DAKOTA

MD 0930 Image

Mesoscale Discussion 0930
NWS Storm Prediction Center Norman OK
0923 PM CDT Wed Jun 17 2020

Areas affected...North-central Nebraska...Portions of central and
eastern South Dakota

Concerning...Severe Thunderstorm Watch 283...

Valid 180223Z - 180430Z

The severe weather threat for Severe Thunderstorm Watch 283
continues.

SUMMARY...The threat for locally damaging wind gusts will continue
for a few more hours. Most severe activity should cease by midnight
CDT. Isolated large hail may occur with the stronger, more discrete
storms.

DISCUSSION...Storms that formed on the pre-frontal confluence have
diminished in intensity as the boundary layer has begun to cool.
Weaker deep-layer shear in northeastern South Dakota has inhibited
storm organization as compared to south-central South Dakota into
north-central Nebraska. Thunderstorms within southern portions of WW
283 have generally grown upscale into small linear segments and
multicell clusters. These storms have also had a tendency to move
just to the cool side of the composite outflow/cold front. The more
discrete activity in from Cherry County, NE northward to near the
Missouri River have only produced 1-1.5 inch hail reports this
evening. Warm temperatures aloft and a increasingly unfavorable
storm mode should continue to limit the threat for large hail.
Locally damaging wind gusts, particularly with any more organized
clusters/cold pools, will be the main threat going forward. The
expectation is for this southern activity to continue to move slowly
east/northeastward as a 50 kt low-level jet (sampled by KLNX VAD)
continues to provide lift along the boundary. However, with
continued boundary-layer stabilization to the east, the severe
potential should decrease by midnight CDT.

..Wendt.. 06/18/2020

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...FGF...FSD...ABR...BIS...LBF...UNR...

LAT...LON   42070225 44250081 44950031 45589964 45949840 45949791
            45709756 44589779 42989925 42219995 41640093 41480150
            41530186 41720216 42070225 

Read more



Source link

Editor
  • Editor
  • Website is owned by STL.News, LLC, but hosted, designed and maintained by WebTech Group (WTG). WTG is a St. Louis based web designed firm offering digital marketing services and news sites. We created RSSWX.News to help the major search engines easily find news direct from the source, which is the National Weather Service.