SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 0101 AM CST Tue Jan 19 2021 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... No severe storms are forecast across the continental United States Wednesday or Wednesday night. ...Discussion... Fast west-northwesterly flow aloft is progged across much of the U.S. Wednesday, except over the southwestern U.S. and Great Basin area, where a cut-off low -- initially lingering off the southern California/Baja coast -- will prevail. This low is forecast to begin an eastward advance Wednesday, gradually moving inland over southern California/northern Baja and then to the lower Colorado Valley and adjacent northern Gulf of California by the end of the period. At the surface, high pressure will largely prevail over the southern half of the CONUS, while farther north a clipper-type system moves across southern Canada and the northern Plains, and later into the Upper Midwest/Great Lakes region. As the upper system moves into the southwestern U.S. with time, showers are expected. As cold air/steep lapse rates aloft spread inland, particularly into the second half of the period, sporadic lightning may also occur, embedded within the broader area of convection. Elsewhere, thunderstorms are not expected. ..Goss.. 01/19/2021
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