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Degraded Performance
Partial Outage
Major Outage
Maintenance

Scheduled Maintenance

FAA NOTAM Maintenance - US Domestic NOTAMs Apr 18, 2026 04:00-09:00 UTC

FAA will perform scheduled maintenance on 18 April from 0400Z to 0900Z.
New US Domestic NOTAMs delivery will likely be unavailable during this maintenance window. And will be available again after the maintenance window ends.
Posted on Apr 08, 2026 - 19:25 UTC
Apr 14, 2026
FAA NOTAM Maintenance - US Domestic NOTAMs
Completed - The scheduled maintenance has been completed.
Apr 14, 06:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 14, 04:00 UTC
Scheduled - FAA will perform scheduled maintenance on 14 April from 0400Z to 0600Z.
US Domestic NOTAMs delivery may be delayed during this maintenance window, lasting approximately 5 minutes at times.
Apr 13, 16:37 UTC
Apr 13, 2026
Global Enhanced Flight Hazards - Missing Files
Resolved - Issues with the Enhanced Flight Hazards has been resolved.
Apr 13, 00:26 UTC
Update - The fix for the Enhanced Flight Hazards has been implemented, the 12 APR 1800Z files are populating and being sent as expected. We will monitor the completion of the 1800Z run. Once all the files have been processed and sent, we will send a message that the issues with these files has been resolved. We should be able to send that message prior to 13 APR 0030Z.
Apr 12, 22:36 UTC
Update - The 12 APR 1200Z Enhanced Flight Hazards has issues/missing files for forecast hours: 02, 04, 05, 06, 07, 09, 11, and 12.

The issue with the Enhanced Flight Hazards from 11 and 12 APR is the introduction of additional data in the GFS model. This has caused issues in processing the GFS model for the Global Enhanced Flight Hazards. A fix for this has been identified and scheduled. The fix for the issues will begin after 1830Z.

We will send updates as we have additional information. The next update will be prior to 13 APR 0000Z.
Apr 12, 17:45 UTC
Update - Engineers continue to work on the Enhanced Flight Hazards issues. The 12 APR 1200Z forecast data will start processing around 1530Z. It is expected that the 12 APR 1200Z will continue to have issues/missing files. But with the work being done currently, engineers are looking into the possibility of implementing a fix after that model run. We will provide updates on that as that information becomes clearer.
Next update around 1800Z.
Apr 12, 14:49 UTC
Update - The troubleshooting of the Enhanced Flight Hazards continue. As the 12 APR 0600Z data is running, there are missing files with this data. Forecast hours with issues are 04, 07, 09, 10, 11, 12, 13, 16, 19, 20, 21, 24, 25, 26, 27, 28, 29, 30. Work continues to get these issues resolved.
Apr 12, 11:06 UTC
Update - The troubleshooting of the Enhanced Flight Hazards continue. As the 12 APR 0000Z data is running, there are missing files with this data. Forecast hours with issues are 08, 12, 13, 16, 20, 27, 28, 30, 32. Work continues to get these issues resolved.
Apr 12, 05:09 UTC
Update - We continue to look into the issue with the Global Enhanced Flight Hazards missing files.
As the 11 APR 1800Z Flight Hazards are running, these forecast hours have missing files: 21, 24, 25, 26, 32, and 35
Apr 11, 23:10 UTC
Update - As we are monitoring the 11 APR 1200Z data, there is missing data with this run. We are seeing issues with these forecast hours:
30, 32, and 34.

Looking into this data from the 1200Z Enhanced Flight Hazards.
Apr 11, 17:56 UTC
Monitoring - The 11 APR 1200Z data will start processing around 1530Z. We are not able to recover the missing files from the 0600Z data.
We are monitoring the arrival and processing of the 11 APR 1200Z data.
Apr 11, 15:19 UTC
Update - We continue to look into the missing files.
For the Flight Hazard GRIB files, these 3 files are currently not available:
DTN0_GFS2_02_1106_29.TGZ
DTN0_GFS2_02_1106_31.TGZ
DTN0_GFS2_02_1106_35.TGZ
Apr 11, 13:25 UTC
Investigating - We are looking into the 11 APR 0600Z Global Enhanced Flight Hazards. There are some missing files in this data.
Apr 11, 12:30 UTC
Apr 12, 2026
Apr 11, 2026
FAA NOTAM Maintenance - US Domestic NOTAMs
Completed - The scheduled maintenance has been completed.
Apr 11, 08:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 11, 04:00 UTC
Scheduled - FAA will perform scheduled maintenance on 11 April from 0400Z to 0800Z.
US Domestic NOTAMs delivery may be delayed during this maintenance window, lasting approximately 10 minutes at times.
Apr 10, 11:04 UTC
Apr 10, 2026
FAA NOTAM Maintenance - US Domestic NOTAMs
Completed - The scheduled maintenance has been completed.
Apr 10, 12:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 10, 04:00 UTC
Scheduled - FAA will perform scheduled maintenance on 10 April from 0400Z to 1200Z.
US Domestic NOTAMs delivery may be unavailable multiple times during this maintenance window, lasting approximately 15-20 minutes at a time.
Apr 6, 15:41 UTC
Apr 9, 2026
US Domestic NOTAMs
Resolved - This issue is resolved, DTN continues to receive US Domestic NOTAMs from the FAA.
Apr 9, 13:47 UTC
Update - We continue to monitor the reception of the US Domestic NOTAM files from the FAA.
Apr 9, 12:56 UTC
Monitoring - DTN is again receiving US Domestic NOTAMs from the FAA. We are monitoring the receipt of this data.
Apr 9, 12:40 UTC
Update - US Domestic NOTAM issues continue. FAA says next update will be after 1200Z.
Apr 9, 10:11 UTC
Update - The FAA continues to work on the issues with sending US Domestic NOTAMs.
Apr 9, 03:13 UTC
Identified - The FAA has just sent a notification. There is an issue at the FAA, they are looking into this. This issue is upstream of DTN, issue is with FAA, the US Domestic NOTAM provider.
Apr 9, 01:28 UTC
Investigating - We are currently investigating a possible issue with US Domestic NOTAMs.
Apr 9, 01:15 UTC
Apr 8, 2026

No incidents reported.

Apr 7, 2026

No incidents reported.

Apr 6, 2026

No incidents reported.

Apr 5, 2026

No incidents reported.

Apr 4, 2026

No incidents reported.

Apr 3, 2026
United States METAR Data Issue
Resolved - The United States METAR distribution issue has been resolved.
Apr 3, 13:01 UTC
Monitoring - DTN has noticed US METARs arriving again from NOAA / FAA. Will monitor this for a bit, before marking this resolved.
Apr 3, 12:33 UTC
Identified - NOAA / FAA are looking into an issue with United Statues METAR data distribution. Many locations are currently unavailable for US locations. This is posted for information, as this issue is with NOAA / FAA.
Apr 3, 12:22 UTC
Apr 2, 2026

No incidents reported.

Apr 1, 2026

No incidents reported.

Mar 31, 2026

No incidents reported.

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