Coolant leak

After I parked coolant sprayed out everywhere under my hood when I looked it was no longer leaking. The hoses and radiator looked okay, there was still coolant left. I turned on my vehicle to try and find the leak, but when I turned it on again it did not leak. I let it run for fifteen minutes and nothing happened. There is no white smoke coming from the exhaust and the oil looks normal. The radiator cap is also only a month old.