Originally Posted by UnderneathTheRadar
ATC (would this warrant a Hazard alert? I thought they were for METARs going SPECI?)
Prefix directed transmissions and broadcasts with HAZARD ALERT when a sudden change to a component of FIS, not described in a current MET product or NOTAM, has an immediate and detrimental effect on the safety of aircraft.
My bolding. A Hazard Alert is only warranted if the ATC become aware of a condition that is
not already promulgated in a MET product or NOTAM e.g METAR/SPECI. It can't be both, if its promulgated it's NOT a HA.