SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0148 AM CST Tue Jan 26 2021 Valid 281200Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe weather is not expected across the U.S. Thursday. ...Discussion... The upper pattern over the U.S. will continue to feature troughs near both the East and West Coasts, and a broad area of anticyclonic flow covering central portions of the country. Some evolution with respect to the eastern trough is expected, as one shorter-wavelength feature shifts into the western Atlantic, and is replaced by a low advancing southeastward out of Canada and into the Northeast. Meanwhile, the more steady-state western trough will make very slow eastward progress toward the West Coast. At the surface, high pressure will prevail east of the Rockies, with ridging/continental air spreading southward across nearly the entire Gulf of Mexico. In the West, a weak Pacific front will move gradually onshore, in advance of the aforementioned upper system. Showers are expected over the West Coast area through much of the period, as the trough aloft slowly advances. Although an occasional/isolated lightning flash may occur inland within the broader area of weak/low-topped convection, coverage is currently expected to remain too sparse to warrant inclusion of a 10% thunder area. ..Goss.. 01/26/2021
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