SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0139 PM CST Fri Jan 15 2021 Valid 152000Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few brief thunderstorms are possible over the middle Ohio Valley to Cumberland Plateau this afternoon. ...20z Update... The ongoing forecast remains on track and no changes have been made with this update. ..Leitman.. 01/15/2021 .PREV DISCUSSION... /ISSUED 1025 AM CST Fri Jan 15 2021/ ...Lower/Middle Ohio Valley to Cumberland Plateau... Cold mid-level temperatures (low to mid -30s C at 500mb) associated with the Midwest-centered cyclone will overspread the region through tonight. Relatively cloud-free skies over the Lower/Middle Ohio Valley and Cumberland Plateau will contribute to a further steepening of low/mid-level lapse rates this afternoon. Even while mixing/low-level drying will tend to occur, a warming boundary layer with scant moisture/buoyancy may be sufficient for a few low-topped thunderstorms this afternoon.
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