 Blue Alert warnings, which indicate that a cyclone may affect the warning area within 48 hours, were issued for Cyclone Rosita on the morning on 19 April.They were upgraded to a Yellow Alert – an indication that a cyclone appears inevitable to affect the warning area in 12 hours – at 1 pm, then to a Red Alert – meaning the cyclone is imminent – at 8 pm.In general, residents were well informed of the warnings through the radio.