By Simon Hradecky, created Thursday, Dec 17th 2020 16:12Z, last updated Thursday, Dec 17th 2020 16:15Z

An Alaska Airlines Airbus A320-200, registration N848VA performing flight AS-1193 from Columbus,OH to Seattle,WA (USA), was enroute at FL380 about 700nm east of Seattle when the crew decided to divert to Los Angeles,CA about 950nm from their present position reporting the first officer's avionics had failed and anti-ice systems were inoperative, they didn't want to take any chances with the weather frontal system developing over the Rocky Mountains spanning from Seattle down to San Francisco. The aircraft landed safely on Los Angeles' runway 25L about 2:25 hours later.

A replacement A320-200 registration N635VA reached Seattle with a delay of 4:25 hours.

Metars Seattle:
KSEA 170953Z 20017G25KT 10SM BKN017 OVC037 08/04 A2966 RMK AO2 PK WND 20028/0943 RAB14E47 SLP049 P0000 T00780044=
KSEA 170853Z 19017G22KT 10SM FEW015 BKN020 OVC028 08/05 A2965 RMK AO2 SLP048 60000 T00780050 51026=
KSEA 170814Z 21015G22KT 10SM BKN020 OVC024 08/05 A2965 RMK AO2 T00830050=
KSEA 170753Z 20012KT 10SM BKN014 OVC023 08/06 A2964 RMK AO2 PK WND 21029/0710 RAE04B20E33 SLP045 P0000 T00830056 401000072=
KSEA 170653Z 21023G28KT 4SM -RA BR BKN010 BKN017 OVC022 09/07 A2960 RMK AO2 PK WND 22029/0606 RAB47 SLP029 P0000 T00890067=
KSEA 170553Z 22016G26KT 10SM SCT008 BKN015 OVC026 09/07 A2957 RMK AO2 PK WND 20028/0511 RAB0458E53 SLP021 P0005 60018 T00940072 10100 20078 53019=
KSEA 170535Z 21017G28KT 4SM -RA BR SCT008 BKN015 OVC028 09/08 A2956 RMK AO2 PK WND 20028/0511 RAB0458 P0005 T00940078=
KSEA 170453Z 19016KT 10SM BKN026 BKN038 10/08 A2954 RMK AO2 SLP009 T01000078=
KSEA 170432Z 18013KT 10SM BKN024 OVC035 09/08 A2952 RMK AO2 T00940078=
KSEA 170353Z 18012KT 10SM FEW034 SCT041 BKN048 09/07 A2952 RMK AO2 RAE17 SLP004 P0001 T00940072=
KSEA 170253Z 18010KT 7SM -RA FEW017 BKN033 OVC041 09/07 A2952 RMK AO2 RAB26 SLP002 P0003 60012 T00890067 55020=
KSEA 170153Z 13008KT 10SM OVC039 08/06 A2949 RMK AO2 RAE35 SLP994 P0003 T00830061=
KSEA 170053Z 12011KT 7SM -RA OVC044 08/06 A2953 RMK AO2 SLP008 P0006 T00830061=

https://flightaware.com/live/flight/ASA1193/history/20201216/2340Z/KCMH/KSEA