Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0759 PM CDT Thu Jul 09 2020 Valid 100100Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER THE MIDWEST AND GREAT LAKES REGION AS WELL AS THE CENTRAL AND SOUTHERN PLAINS... ...SUMMARY... A few strong to severe storms will persist this evening over parts the Midwest, Great Lakes and the central High Plain. Other strong to severe storms are possible later tonight across parts of Kansas and OK. Isolated large hail and damaging wind are the primary threats. ...Midwest and Great Lakes region... Line of multicell storms will continue to pose some threat for isolated strong to damaging wind through mid evening as they move through remaining corridor of moderate instability. Activity should begin to weaken by 03Z as the boundary layer stabilizes. ...Central High Plains... Storms will continue moving off the higher terrain and into the High Plains within a low-level upslope regime and an environment characterized by moderate instability and supercell wind profiles. Isolated damaging wind and large hail remain possible this evening, but activity should begin to diminish after 03Z as convective inhibition increases. ...Kansas and Oklahoma... An outflow boundary has advanced through much of OK and now extends from the northwest part of the state southeastward through southeastern OK. Towering cumulus has been observed on visible imagery, but capping evident on the 00Z Norman RAOB suggests it may be difficult to initiate storms along this boundary given presence of only modest and shallow convergence and the onset of nocturnal cooling. Storms will most likely develop later this evening or tonight as the low-level jet increases and augments isentropic ascent north of the boundary across KS into northern OK. Moderate instability and steep mid-level lapse rates will support some threat for isolated large hail, and a few locally strong to damaging gusts will also be possible. Otherwise, small cluster of storms moving into northwest TX will pose a risk for downburst winds and hail through about 02Z before weakening as the surface layer stabilizes and convective inhibition increases. ..Dial.. 07/10/2020Read more
from SPC Forecast Products http://www.spc.noaa.gov/products/outlook/day1otlk_0100.html
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