SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0133 PM CST Fri Jan 22 2021 Valid 222000Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... No severe weather is expected across the U.S. today and tonight. ...20z Update... Minor changes have been made to the 10% General Thunder area in central CA. The thunder area has been trimmed on the northern and eastern edges to account for latest model and observational trends. A few lightning flashes are still possible near the Bay Area southward toward San Luis Obispo County. Otherwise, the ongoing forecast remains on track. ..Leitman.. 01/22/2021 .PREV DISCUSSION... /ISSUED 1022 AM CST Fri Jan 22 2021/ ...CA/NV/UT/AZ... A compact upper low and associated strong shortwave trough will pivot from the central CA coast into southern NV through tonight. A pocket of cold temperatures aloft and steep lapse rates will accompany this system, promoting convective showers and isolated thunderstorms. No severe storms are anticipated, although small hail is possible in the more intense showers.
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