WVRA32 RUSH 201855 UHSH SIGMET 4 VALID 201900/210100 UHSS- UHSH OKHA FIR VA ERUPTION MT SARYCHEV-PEAK LOC N4806E15312 VA CLD OBS AT 1659Z UNKNOWN/FL320 N5155E15039 MOV E 60KMH FCST 2259Z VA CLD APRX SFC/FL200 N5430E14730 FL200/350 N5112E15038 FL350/550 NO VA EXP