Alerts API

[hluker]

I notice fairly regularly that a VTEC event will get "stuck" in the alerts API and remain there until the original expiration time, even though it has been updated via CON, UPG, etc.

For example on https://api.weather.gov/alerts/active/area/IA as of 11:30 on the 31st:

        {
            "id": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.cebc5247c4868e3319138380702df07e33119861.001.1",
            "type": "Feature",
            "geometry": null,
            "properties": {
                "@id": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.cebc5247c4868e3319138380702df07e33119861.001.1",
                "@type": "wx:Alert",
                "id": "urn:oid:2.49.0.1.840.0.cebc5247c4868e3319138380702df07e33119861.001.1",
                "areaDesc": "Benton; Linn; Jones; Jackson; Iowa; Johnson; Cedar; Clinton; Muscatine; Scott; Keokuk; Washington; Louisa; Jefferson; Henry; Des Moines; Van Buren; Lee; Carroll; Whiteside; Rock Island; Henry; Bureau; Putnam; Mercer; Henderson; Warren; Hancock; McDonough; Scotland; Clark",
                "geocode": {
                    "SAME": [
                        "019011",
                        "019113",
                        "019105",
                        "019097",
                        "019095",
                        "019103",
                        "019031",
                        "019045",
                        "019139",
                        "019163",
                        "019107",
                        "019183",
                        "019115",
                        "019101",
                        "019087",
                        "019057",
                        "019177",
                        "019111",
                        "017015",
                        "017195",
                        "017161",
                        "017073",
                        "017011",
                        "017155",
                        "017131",
                        "017071",
                        "017187",
                        "017067",
                        "017109",
                        "029199",
                        "029045"
                    ],
                    "UGC": [
                        "IAZ051",
                        "IAZ052",
                        "IAZ053",
                        "IAZ054",
                        "IAZ063",
                        "IAZ064",
                        "IAZ065",
                        "IAZ066",
                        "IAZ067",
                        "IAZ068",
                        "IAZ076",
                        "IAZ077",
                        "IAZ078",
                        "IAZ087",
                        "IAZ088",
                        "IAZ089",
                        "IAZ098",
                        "IAZ099",
                        "ILZ007",
                        "ILZ009",
                        "ILZ015",
                        "ILZ016",
                        "ILZ017",
                        "ILZ018",
                        "ILZ024",
                        "ILZ025",
                        "ILZ026",
                        "ILZ034",
                        "ILZ035",
                        "MOZ009",
                        "MOZ010"
                    ]
                },
                "affectedZones": [
                    "https://api.weather.gov/zones/forecast/IAZ051",
                    "https://api.weather.gov/zones/forecast/IAZ052",
                    "https://api.weather.gov/zones/forecast/IAZ053",
                    "https://api.weather.gov/zones/forecast/IAZ054",
                    "https://api.weather.gov/zones/forecast/IAZ063",
                    "https://api.weather.gov/zones/forecast/IAZ064",
                    "https://api.weather.gov/zones/forecast/IAZ065",
                    "https://api.weather.gov/zones/forecast/IAZ066",
                    "https://api.weather.gov/zones/forecast/IAZ067",
                    "https://api.weather.gov/zones/forecast/IAZ068",
                    "https://api.weather.gov/zones/forecast/IAZ076",
                    "https://api.weather.gov/zones/forecast/IAZ077",
                    "https://api.weather.gov/zones/forecast/IAZ078",
                    "https://api.weather.gov/zones/forecast/IAZ087",
                    "https://api.weather.gov/zones/forecast/IAZ088",
                    "https://api.weather.gov/zones/forecast/IAZ089",
                    "https://api.weather.gov/zones/forecast/IAZ098",
                    "https://api.weather.gov/zones/forecast/IAZ099",
                    "https://api.weather.gov/zones/forecast/ILZ007",
                    "https://api.weather.gov/zones/forecast/ILZ009",
                    "https://api.weather.gov/zones/forecast/ILZ015",
                    "https://api.weather.gov/zones/forecast/ILZ016",
                    "https://api.weather.gov/zones/forecast/ILZ017",
                    "https://api.weather.gov/zones/forecast/ILZ018",
                    "https://api.weather.gov/zones/forecast/ILZ024",
                    "https://api.weather.gov/zones/forecast/ILZ025",
                    "https://api.weather.gov/zones/forecast/ILZ026",
                    "https://api.weather.gov/zones/forecast/ILZ034",
                    "https://api.weather.gov/zones/forecast/ILZ035",
                    "https://api.weather.gov/zones/forecast/MOZ009",
                    "https://api.weather.gov/zones/forecast/MOZ010"
                ],
                "references": [],
                "sent": "2021-12-30T03:04:00-06:00",
                "effective": "2021-12-30T03:04:00-06:00",
                "onset": "2022-01-01T06:00:00-06:00",
                "expires": "2021-12-30T11:15:00-06:00",
                "ends": "2022-01-02T00:00:00-06:00",
                "status": "Actual",
                "messageType": "Alert",
                "category": "Met",
                "severity": "Severe",
                "certainty": "Possible",
                "urgency": "Future",
                "event": "Winter Storm Watch",
                "sender": "w-nws.webmaster@noaa.gov",
                "senderName": "NWS Quad Cities IA IL",
                "headline": "Winter Storm Watch issued December 30 at 3:04AM CST until January 2 at 12:00AM CST by NWS Quad Cities IA IL",
                "description": "* WHAT...Heavy snow possible. Total snow accumulations of 4 to 7\ninches possible.\n\n* WHERE...Portions of northeast Missouri, east central and\nsoutheast Iowa and north central, northwest and west central\nIllinois.\n\n* WHEN...From Saturday morning through Saturday evening.\n\n* IMPACTS...Travel could be very difficult.",
                "instruction": "Monitor the latest forecasts for updates on this situation.",
                "response": "Prepare",
                "parameters": {
                    "AWIPSidentifier": [
                        "WSWDVN"
                    ],
                    "WMOidentifier": [
                        "WWUS43 KDVN 300904"
                    ],
                    "NWSheadline": [
                        "WINTER STORM WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING"
                    ],
                    "BLOCKCHANNEL": [
                        "EAS",
                        "NWEM",
                        "CMAS"
                    ],
                    "EAS-ORG": [
                        "WXR"
                    ],
                    "VTEC": [
                        "/O.NEW.KDVN.WS.A.0005.220101T1200Z-220102T0600Z/"
                    ],
                    "eventEndingTime": [
                        "2022-01-02T06:00:00+00:00"
                    ]
                }
            }
        }
    ],

The timestamp associated with that VTEC is 304 AM CST Thu Dec 30 2021. It has been updated three times since that point (over 24 hours later), including an upgrade:

519 PM CST Thu Dec 30 2021 /O.CON.KDVN.WS.A.0005.220101T1200Z-220102T0600Z/
902 PM CST Thu Dec 30 2021 /O.CON.KDVN.WS.A.0005.220101T1200Z-220102T0600Z/
325 AM CST Fri Dec 31 2021
/O.UPG.KDVN.WS.A.0005.220101T1200Z-220102T0600Z/
/O.NEW.KDVN.WS.W.0006.220101T1200Z-220102T0600Z/

And yet it still sits there.

This isn't a one-off occurrence either, it happens semi-regularly.

[sullynole]

There is an issue where alerts that have been updated sometimes remain on the active endpoint too long. This will be fixed in a software update. A possible workaround until then is to cross-check the expiredReferences of all alerts in the endpoint.