experience in emergency preparedness. The bases prefer to set these alerts sequentially, from HURCON or TCCOR 5 with destructive winds expected within 96 hours, through levels 4, 3, 2 and if needed to a series of four different level 1 conditions, however depending on the cyclone's movement or location some of these signals can be skipped. After a system passes and stops affecting the base, the authorities can decide to revert to the lowest level or stay in a heightened approach if another tropical cyclone is approaching. See also Gale warning HURCON Severe weather terminology (disambiguation) Small craft advisory Storm warning References External links NHC - watches and warnings Tropical cyclone meteorology Weather warnings and advisories