Narrative:

After signing-in; I completed my self-brief. From the verbal briefings I received from the outgoing dispatchers; I remembered hearing that ZZZ center would be ATC zero for covid cleaning. During my self-brief I saw ATC messages; and information in the written brief regarding the ATC zero status for ZZZ center. Because I knew my red-eye flight abcd; would not be affected by the ZZZ center closure; I skimmed the messages; information in the briefing regarding the closure; and reroutes page; and did not notice that ZZZ1 center was also going to be closed for a covid cleaning tonight. I planned the flight on a normal routing which traversed ZZZ1 center. Approximately 30 minutes before departure; I realized that I had missed the fact that ZZZ1 center was also going to be closed for covid cleaning during the time in which my flight would traverse it. I asked the crew if they received their clearance yet. They did. I asked the captain to call me so we could talk over the details of fuel/route. I called ATC to cancel the current filing; as well as called ZZZ airport station to send out the fueler to add more fuel to the aircraft. I computed a new route in sabre that would avoid ZZZ1 center; and re-released/refiled the flight to avoid ZZZ1 center. I asked the crew to confirm the new routing with ATC. When ATC re-issued the clearance; they changed the departure routing. After confirming the new ATC route with the crew; I re-released the flight again. The flight departed 6 minutes late.expectation bias was a factor in me missing the ZZZ1 center closure when originally planning the flight. Because I had remembered hearing about the ZZZ center closure during turnover; I expected the messages and briefing information relating to ATC covid cleaning to only contain information regarding the ZZZ center closure. As I skimmed the messages; I expected ZZZ1 center to read [as] ZZZ center in the messages regarding the closures; and disregarded the messages too quickly; because I knew the ZZZ center closure didn't affect my flight. Because I disregarded the messages; expecting it not to apply to my flight; I missed the fact that ZZZ1 center was also impacted by the covid cleanings; and that my flight would be need to be routed around ZZZ1 center.

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Original NASA ASRS Text

Title: Dispatcher reported not properly planning for a Center to be ATC Zero for COVID cleaning.

Narrative: After signing-in; I completed my self-brief. From the verbal briefings I received from the outgoing dispatchers; I remembered hearing that ZZZ Center would be ATC Zero for COVID cleaning. During my self-brief I saw ATC messages; and information in the written brief regarding the ATC Zero status for ZZZ Center. Because I knew my red-eye Flight ABCD; would not be affected by the ZZZ Center closure; I skimmed the messages; information in the briefing regarding the closure; and reroutes page; and did not notice that ZZZ1 Center was also going to be closed for a COVID cleaning tonight. I planned the flight on a normal routing which traversed ZZZ1 Center. Approximately 30 minutes before departure; I realized that I had missed the fact that ZZZ1 Center was also going to be closed for COVID cleaning during the time in which my flight would traverse it. I asked the crew if they received their clearance yet. They did. I asked the Captain to call me so we could talk over the details of fuel/route. I called ATC to cancel the current filing; as well as called ZZZ airport station to send out the fueler to add more fuel to the aircraft. I computed a new route in SABRE that would avoid ZZZ1 Center; and re-released/refiled the flight to avoid ZZZ1 Center. I asked the crew to confirm the new routing with ATC. When ATC re-issued the clearance; they changed the departure routing. After confirming the new ATC route with the crew; I re-released the flight again. The flight departed 6 minutes late.Expectation bias was a factor in me missing the ZZZ1 Center closure when originally planning the flight. Because I had remembered hearing about the ZZZ Center closure during turnover; I expected the messages and briefing information relating to ATC COVID cleaning to only contain information regarding the ZZZ Center closure. As I skimmed the messages; I expected ZZZ1 Center to read [as] ZZZ Center in the messages regarding the closures; and disregarded the messages too quickly; because I knew the ZZZ Center closure didn't affect my flight. Because I disregarded the messages; expecting it not to apply to my flight; I missed the fact that ZZZ1 Center was also impacted by the COVID cleanings; and that my flight would be need to be routed around ZZZ1 Center.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.