SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1150 PM CST Tue Dec 08 2020 Valid 091200Z - 101200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible tonight across parts of southern Arizona. ...DISCUSSION... An upper-level ridge will move across the north-central states today as an upper-level low moves from the eastern Pacific toward the Desert Southwest. As large-scale ascent ahead of the low moves across southern Arizona tonight, isolated thunderstorm development will be possible. Instability ahead of the system will be very weak and no severe threat is expected. Elsewhere across the continental United States, thunderstorms are not forecast today and tonight. ..Broyles/Lyons.. 12/09/2020
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