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Mesoscale Discussion 1957 | |
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Mesoscale Discussion 1957 NWS Storm Prediction Center Norman OK 0224 PM CDT Mon Aug 19 2024 Areas affected...Virginia and portions of North Carolina Concerning...Severe potential...Watch unlikely Valid 191924Z - 192130Z Probability of Watch Issuance...20 percent SUMMARY...Scattered thunderstorm activity will have potential to produce downbursts with strong to severe gusts. DISCUSSION...Thunderstorm activity has increased in coverage across Virginia and North Carolina this afternoon as lift from a mid-level trough overspreads a cold front across the region. Breaks in morning cloud cover have allowed for sufficient daytime heating and temperatures in the mid to upper 80s, with low-level lapse rates around 8 C/km. MLCAPE around 1000-1500 J/kg is analyzed in RAP objective analysis. While deep layer shear is weak, steep lapse rates and precipitable water values above 1 inch will support potential for a few strong storms with potential for downbursts capable of strong to severe gusts. Overall, this threat will likely remain too localized for watch issuance. ..Thornton/Hart.. 08/19/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...PHI...AKQ...MHX...LWX...RAH...RNK... LAT...LON 36117983 36997936 38257821 38977726 39367670 39577629 39397579 38517527 37817552 36627595 35907616 35037641 34857648 35387934 36117983 |
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