To show how unusual & extreme Monday's setup is, the 6z GFS forecast for 130 KT 250 mb (near tropopause) wind at KAMA (Amarillo, TX) would be the strongest 250mb wind observed in May by ~ 15 KTS & the strongest this late in the season by > 3 weeks. KAMA data goes back to 1952. pic.twitter.com/qw6m8l52Lq

— Eric Webb (@webberweather) May 18, 2019