WAUS42 KKCI 210845 WA2S MIAS WA 210845 AIRMET SIERRA UPDT 4 FOR IFR AND MTN OBSCN VALID UNTIL 211500 . NO SGFNT IFR EXP OUTSIDE OF CNVTV ACT. . OTLK VALID 1500-2100Z...MTN OBSCN NC SC GA ME NH VT MA NY PA WV MD VA BOUNDED BY 50N PQI-30SSW HUL-20WSW ENE-30ENE EMI-30N GSO-40SW SPA-40WSW GQO-GQO-HMV-HNN-40WSW HNN-30NNE HNN-20WSW JHW-40NNE MSS-70NNE MPV-70NW PQI-50N PQI MTNS OBSC BY CLDS/PCPN/BR. CONDS CONTG THRU 21Z. ....