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PRIMARY CODE: UNIDENTIFIED AERIAL PHENOMENON
Date: 01:00 02/01/2023
Status: Closed
POD: DEN
Callsign: DAL573
Reporting Facility: ZLC
Aircraft: B739
Tail Number:
Operator: DAL
Origin: SEA
Destination: DTW
New Destination:
Operator Type: Commercial
Paged: NO
REMARKS
Aircraft observed a large silver balloon FL420-450 off the left side while east bound at FL330, 30 NM south of FCA. No evasive action was taken. ZLC checked with WX and TMU and no one has a report of having a balloon airborne. TY/JH notified.