Mesoscale Discussion 0984 NWS Storm Prediction Center Norman OK 0947 PM CDT Thu Jun 04 2026 Areas affected...Parts of south-central SD into northwest/north-central NE Concerning...Severe Thunderstorm Watch 272...273... Valid 050247Z - 050445Z The severe weather threat for Severe Thunderstorm Watch 272, 273 continues. SUMMARY...A threat for severe gusts, isolated hail, and perhaps a tornado will continue into late evening. DISCUSSION...A small but intense storm cluster has evolved this evening from western Cherry County, NE into Todd County, SD, in the vicinity of a surface boundary that extends into south-central/southeast SD. The KLNX VWP shows a notable increase in 0-1 km flow over the last 1-2 hours, which may help to sustain this cluster as it moves across a corridor of relatively rich low-level moisture and moderate buoyancy. Severe wind gusts appear to be the primary hazard, though isolated hail and a brief tornado also cannot be ruled out with any transient embedded supercells. Some severe threat may continue just to the south of WW 273, though limited spatial coverage of the threat across far northern NE may preclude additional watch issuance. Farther north, a recent increase in storm coverage/intensity has been noted west of Pierre, SD, as outflow associated with earlier western SD convection begins to impinge upon stronger buoyancy. Stronger updrafts within this developing convection may produce hail, while a larger-scale threat for severe gusts may evolve if substantial upscale growth occurs. ..Dean/Guyer.. 06/05/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FSD...ABR...LBF...UNR... LAT...LON 44670087 44929952 44849839 44339797 43569816 43069832 42809857 42579914 42479993 42510066 42560121 42610168 42930192 43250146 43490118 44670087 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN
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