INDEX Summary - FLATHEAD Event, Operation HEDWING Forecast Fallout Plot © FLATHEAD Cloud Trajectory Forecast Air and Surface RADEX ~ FLATHEAD 1, Forecast for 120600M June 1956 2. Observed Winds for 120800M June 1956 3. BIKINI Observed Weather for 12 June 1956 l. Initial Radiologicat Survey H+3 Hours 2, Radiological Survey H+7 to E+8 Hours WB-SO Cloud Tracking Results (Flt #1) WB-50 Aerial Monitoring Flight H+10 through H+18 Hours (Fit #2) , ZEBRA & ZEBRA I Aerial Radiological Reconnaissance Flight Patterns