SPC Tornado Watch 688

WW 688 TORNADO AZ 211700Z - 220100Z URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 688 NWS Storm Prediction Center Norman OK 1000 AM MST Wed Oct 21 2026 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northern and Central Arizona * Effective this Wednesday morning and evening from 1000 AM until 600 PM MST. * Primary threats include... A few tornadoes possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorm coverage is expected to increase across northern and central Arizona this afternoon. Strong vertical shear will support supercells thunderstorms capable of all severe hazards, including 2"+ diameter hail and tornadoes. The threat for severe weather will persist throughout the afternoon and into the evening. The tornado watch area is approximately along and 70 statute miles north and south of a line from 95 miles west of Grand Canyon AZ to 45 miles east of Winslow AZ. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Wa...