Three weekend accidents in Northern Colorado have made Banner Health's supply of fresh blood low. North Colorado Medical Center's Blood Donor Center is asking for the community's help. Especially Types O and A are needed. On Wednesday, the Medical Center's bloodmobile will visit Crop Production Services, 3005 Rocky Mountain Ave. in Loveland, from 9 a.m. to noon. From 8 a.m. to noon Thursday, it will be at the Banner Corporate Center, 460 71st Ave., Greeley. Donors need to eat a good meal, drink lots of water and have a driver's license with them when they come to donate. Call 350-6100 for an appointment.