what will cause low or no coolant in upper hose & heater hoses. no outside leak

What is your question?

new to me jeep. It is skipping and bogging down when excelerating and now has started overheating and has no coolant in both heater hoses and the thermostat housing is bone dry. I don't see an external leak anywhere. there is a hose T in heater hose, with engine just started I have steam or vaporized antifreeze coming out when I opened cap to see if coolant was flowing. upper hose gets rock hard after short drive 5mi. or less. codes show cylinder 2 missfire.