SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1149 PM CST Mon Nov 16 2020 Valid 181200Z - 191200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Wednesday or Wednesday night. ...Pacific Northwest through the forecast period... A series of midlevel shortwave troughs will progress inland over the Pacific Northwest beginning on day 1 and continuing through the day 2 forecast period. Steepening low-midlevel lapse rates and relatively moist, onshore flow will contribute to surface-based CAPE of 100-300 J/kg, mainly from the crest of the Cascades westward to the coast. Here, low-topped convection with occasional lightning flashes will be possible, with convection somewhat focused with an initial shortwave trough early in the day, and with another trough overnight. The strongest cells could produce gusty winds and small hail given the cold midlevel temperatures (close to minus 30 C at 500 mb), but severe storms are not anticipated. Very isolated lightning flashes may also occur across eastern OR/WA into ID as the initial shortwave trough progresses inland, but marginal buoyancy suggests this threat will be too low to warrant an outlook area. East of the Rockies, relatively dry/stable low-level conditions are expected in the wake of a cold front that will drift south of the FL Peninsula. ..Thompson.. 11/17/2020
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