Colorado resorts are worried about the upcoming ski season because of concerns over weather forecasts and international issues. Stay Aspen Snowmass President Bill Tomcich says a decline in September bookings for this winter should pick up once the snow starts falling. A bad to average snow year in 2014-15, questions about the El Nino weather forecasts and a strong American dollar are all factoring into the booking pace for this winter. Forecasters say the Pacific weather pattern known as El Nino usually brings above-average snowfall to southwest Colorado, but has irregular impacts farther north. Skico spokesman Jeff Hanle says international business will be a challenge this year due to the dollar’s strength and resorts are counting on domestic customers to fill the gap.