UNTIL 5 PM TODAY: RED FLAG WARNING How quickly things change. Dry conditions behind the recent cold front has dropped relative humidity levels to 25% or less across central Alabama. Most ALL areas will drop below 25% humidity for several hours this afternoon. This fact - combined with Northeast winds of 5 to 10 mph - will make outdoor burning potentially dangerous. Therefore, the National Weather Service (NWS) in Birmingham has issued a RED FLAG ALERT until 5:00 pm this afternoon.