Forecasts of seasonal snow melt or water-year runoff are prepared monthly in areas where snow is the principal source of stream flow.
(Forecasts of seasonal snow melt or water-year runoff; are prepared monthly; L:in areas) (snow; is; the principal source of stream flow; L:areas)
Forecasts of seasonal snow melt or water-year runoff snow
are prepared monthly is
L:in areas
the principal source of stream flow L:areas