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| Mesoscale Discussion 2020 | |
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Mesoscale Discussion 2020 NWS Storm Prediction Center Norman OK 0624 PM CDT Tue Aug 27 2024 Areas affected...Northeast IL into extreme northwest IN/southwest MI Concerning...Severe Thunderstorm Watch 658... Valid 272324Z - 280100Z The severe weather threat for Severe Thunderstorm Watch 658 continues. SUMMARY...The severe threat will spread southeastward through early evening. DISCUSSION...A supercell has developed across far northeast IL, with reports of severe wind gusts and hail up to golf ball size thus far. Large to extreme instability will continue to support vigorous updrafts early this evening. Deep-layer shear becomes increasingly modest with southward extent, but will remain locally enhanced near a lake-enhanced surface boundary draped northwest to southeast across the Chicagoland vicinity. The ongoing supercell may propagate southeastward near this boundary, with a continued threat of large hail and severe/damaging gusts. There is some potential for additional development near the trailing outflow, with increasing cumulus noted in Kane County. Depending on the number and proximity of storms that develop early this evening, some upscale growth into a southeastward-moving cluster will be possible with time. Downstream watch issuance is possible if a severe threat begins to approach northwest IN/southwest MI. ..Dean/Gleason.. 08/27/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...IWX...LOT... LAT...LON 42488833 42458779 42398760 42088668 41808633 41518637 41258654 41188716 41288767 41548817 41828869 42388855 42488833 |
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