“…Upper-level circulation observed during AR landfalls in Northern California (Neiman et (Neiman et al, 2008) feature a prominent high-low couplet with a gradient parallel to the coast, which acts to channel wind and moisture onshore. Recent work highlighted links between regional AR activity and circulation features associated with common teleconnection patterns such as the Pacific North American Pattern (PNA; Guan & Waliser, 2015), Arctic Oscillation (Guan et al, 2013), El Niño Southern Oscillation (ENSO; Ryoo et al, 2013;Kim & Alexander, 2015;Kim et al, 2017), Pacific Decadal Oscillation (PDO; GSR'17), Madden-Julian Oscillation (MJO; Guan & Waliser, 2015), and the MJO jointly with the quasi-biennial oscillation (Baggett et al, 2017;Mundhenk et al, 2018). Recent work highlighted links between regional AR activity and circulation features associated with common teleconnection patterns such as the Pacific North American Pattern (PNA; Guan & Waliser, 2015), Arctic Oscillation (Guan et al, 2013), El Niño Southern Oscillation (ENSO; Ryoo et al, 2013;Kim & Alexander, 2015;Kim et al, 2017), Pacific Decadal Oscillation (PDO; GSR'17), Madden-Julian Oscillation (MJO; Guan & Waliser, 2015), and the MJO jointly with the quasi-biennial oscillation (Baggett et al, 2017;Mundhenk et al, 2018).…”