diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6d11d09b..c13343cee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,16 @@
   Manifest paths are relative to the manifest, so a build served under a path
   prefix installs and launches inside that prefix.
 
+- Cyclone advisories no longer go dark while NHC publishes an advisory ahead
+  of its nominal time: advisory and position times up to 90 minutes ahead of
+  the server clock are accepted (previously 5 minutes), so the whole feed is
+  not rejected for about half an hour each advisory cycle.
+
+- Flights age out vanished aircraft again. OpenSky's routine position-less rows
+  no longer mark every snapshot partial, which had kept vanished and landed
+  aircraft at full opacity for up to five minutes; those rows retain only their
+  own aircraft, and a likely-landed one still leaves on the landed limit.
+
 - Add WSDOT highway cameras (Washington State) as a keyless CCTV source pack:
   WSDOT's official Travel Center camera layer, with frames registered only on
   WSDOT's own image host (partner-hosted cameras such as Oregon DOT and City of
diff --git a/docs/CURRENT-STATE.md b/docs/CURRENT-STATE.md
index 7f026775f..889e26431 100644
--- a/docs/CURRENT-STATE.md
+++ b/docs/CURRENT-STATE.md
@@ -339,7 +339,12 @@ Cyclones combine fixed NHC/CPHC status and summary GIS endpoints through a bound
 same-origin provider. The status endpoint lacks browser CORS; each installation
 fetches keyless public sources at runtime, with no centralized ingestion service.
 The five-minute snapshot covers Atlantic and eastern/central North Pacific only.
-Current positions, advisory issue time and position time stay distinct. Tracks,
+Current positions, advisory issue time and position time stay distinct. NHC may
+release an advisory before its nominal time (routinely up to about 30 minutes,
+rarely about an hour), so advisory issue and position times up to and including
+90 minutes ahead of the server clock are accepted; 90 minutes is this app's
+tolerance, not an NHC limit. Later, non-canonical, or more than 12-hour-old
+times still reject the status snapshot. Tracks,
 forecast lead-hour points and cones render only when all source parts match the
 status advisory; a newer status shows its position with geometry pending rather
 than relabeling older geometry. The cone represents forecast center uncertainty,
@@ -872,7 +877,13 @@ addition to the locally accumulated trail, never a promise of complete coverage.
 
 Snapshot coverage, completeness and freshness are separate fields. A partially
 admitted aircraft snapshot retains absent contacts for up to five minutes before
-the usual missed-poll eviction. Unknown snapshot times remain unknown in stats. An invalid nonempty
+the usual missed-poll eviction. An OpenSky row with an ICAO24 address but null
+longitude and latitude is a contact without a position, not a malformed row: it
+leaves the snapshot complete and is listed in `retainIds`, so civil flights
+retain that aircraft under the same five-minute bound, unless it is likely
+landed, while other absent aircraft fade and leave on the missed-poll limits. A
+nonempty snapshot with no positioned rows is still malformed. Military readsb
+admission is unchanged. Unknown snapshot times remain unknown in stats. An invalid nonempty
 snapshot retains the previous display. Empty vessel refreshes retain the existing
 first-connect grace and warm-data behavior. Known source failures have bounded
 messages; arbitrary HTTP response bodies are not surfaced as diagnostics.
diff --git a/server/providers/cyclones.js b/server/providers/cyclones.js
index fede1aade..d580357ce 100644
--- a/server/providers/cyclones.js
+++ b/server/providers/cyclones.js
@@ -41,6 +41,9 @@ function number(value, min, max) {
   const n = Number(value);
   return Number.isFinite(n) && n >= min && n <= max ? n : null;
 }
+// NHC stamps an advisory with its nominal time (e.g. 03:00Z) and publishes it
+// up to about half an hour before; allow that, but not a clock far ahead.
+const EARLY_ADVISORY_MS = 90 * 60_000;
 function iso(value, now) {
   if (
     typeof value !== 'string' ||
@@ -50,7 +53,7 @@ function iso(value, now) {
   const n = Date.parse(value);
   if (
     !Number.isFinite(n) ||
-    n > now + 5 * 60_000 ||
+    n > now + EARLY_ADVISORY_MS ||
     now - n > 12 * HOUR ||
     new Date(n).toISOString().replace('.000Z', 'Z') !==
       value.replace('.000Z', 'Z')
diff --git a/src/data/cyclonesProxy.test.mjs b/src/data/cyclonesProxy.test.mjs
index 04729d33a..23e84826c 100644
--- a/src/data/cyclonesProxy.test.mjs
+++ b/src/data/cyclonesProxy.test.mjs
@@ -162,6 +162,44 @@ test('malformed, duplicate, oversized, future and expired status is rejected rat
   assert.deepEqual(parseCycloneStatus({ activeStorms: [] }, NOW), []);
 });
 
+test('advisories published before their nominal time are accepted, far-future ones are not', () => {
+  // NHC wrote the 03:00Z advisory at 02:34Z.
+  const early = Date.UTC(2026, 8, 16, 2, 34);
+  assert.equal(parseCycloneStatus(status(), early)[0].issuedAt, TIME);
+  assert.throws(
+    () => parseCycloneStatus(status(), Date.UTC(2026, 8, 16, 1, 25)),
+    /invalid_cyclone_data/,
+  );
+});
+
+test('advisory and position times are bounded at 90 minutes ahead and 12 hours old', () => {
+  const MINUTE = 60_000;
+  const at = (offsetMs) => new Date(NOW + offsetMs).toISOString();
+  const fields = {
+    issuedAt: (value) =>
+      status({
+        forecastAdvisory: {
+          advNum: '010',
+          issuance: value,
+          url: 'https://www.nhc.noaa.gov/text/MIATCMEP5.shtml',
+        },
+      }),
+    positionAt: (value) => status({ lastUpdate: value }),
+  };
+  for (const [field, payload] of Object.entries(fields)) {
+    for (const offset of [90 * MINUTE, -12 * 60 * MINUTE]) {
+      const [storm] = parseCycloneStatus(payload(at(offset)), NOW);
+      assert.equal(storm[field], at(offset), `${field} ${offset}`);
+    }
+    for (const offset of [90 * MINUTE + 1, -12 * 60 * MINUTE - 1])
+      assert.throws(
+        () => parseCycloneStatus(payload(at(offset)), NOW),
+        /invalid_cyclone_data/,
+        `${field} ${offset}`,
+      );
+  }
+});
+
 test('coherent geometry is retained with holes/dateline while older advisory geometry is omitted', () => {
   const storms = parseCycloneStatus(status(), NOW);
   const parts = collections();
diff --git a/src/layers/flights/records.js b/src/layers/flights/records.js
index 2b6f48dfb..709cd69ed 100644
--- a/src/layers/flights/records.js
+++ b/src/layers/flights/records.js
@@ -275,10 +275,12 @@ export class FlightRecords {
     return { icao24, prevMeta, meta, groundFlipped, fixEpochMs };
   }
 
-  absence(id, { complete, likelyLanded }) {
-    // Partial admissions do not prove absence, but retention remains bounded.
+  absence(id, { complete, retainIds, likelyLanded }) {
+    // Partial admissions and position-less rows do not prove absence, but
+    // retention remains bounded; a likely-landed position-less contact
+    // still takes the landed limit.
     if (
-      !complete &&
+      (!complete || (retainIds?.has(id) && !likelyLanded)) &&
       Date.now() - (this.data.get(id)?.observedReceiptMs ?? 0) < 300000
     )
       return 'retain';
diff --git a/src/layers/flights/records.test.mjs b/src/layers/flights/records.test.mjs
index fff25b8b9..638c6f843 100644
--- a/src/layers/flights/records.test.mjs
+++ b/src/layers/flights/records.test.mjs
@@ -107,6 +107,30 @@ test('ground transitions preserve last render height while a surface cell is col
   assert.equal(next.meta.wasAirborne, true);
 });
 
+test('complete snapshots age out vanished aircraft and retain position-less ones unless landed', () => {
+  const store = records();
+  for (const id of ['abc123', 'def456', 'ghi789'])
+    store.receive(observation({ id, reference: id }), view());
+  // abc123 and ghi789 are still listed without a position; def456 vanished.
+  const absent = (id, likelyLanded = false) =>
+    store.absence(id, {
+      complete: true,
+      retainIds: new Set(['abc123', 'ghi789']),
+      likelyLanded,
+    });
+  assert.deepEqual(
+    [absent('def456'), absent('def456'), absent('def456')],
+    ['stale', 'stale', 'remove'],
+  );
+  assert.equal(absent('abc123'), 'retain');
+  assert.equal(store.missingPolls.has('abc123'), false);
+  // A landed contact that lost its position takes the landed fast-cull.
+  assert.equal(absent('ghi789', true), 'remove');
+  // Position-less retention stays bounded like partial admission.
+  store.data.get('abc123').observedReceiptMs = Date.now() - 300001;
+  assert.equal(absent('abc123'), 'stale');
+});
+
 test('civil emergency status follows the latest poll instead of sticking', () => {
   const store = records();
   const first = store.receive(observation({ squawk: '7700' }), view());
diff --git a/src/layers/flights/snapshotRenderer.js b/src/layers/flights/snapshotRenderer.js
index f6e74b125..ec6c2933b 100644
--- a/src/layers/flights/snapshotRenderer.js
+++ b/src/layers/flights/snapshotRenderer.js
@@ -243,6 +243,7 @@ export function createFlightSnapshotRenderer({
       if (currentIcaos.has(icao24)) continue;
       const absence = records.absence(icao24, {
         complete: snapshot.complete,
+        retainIds: snapshot.retainIds,
         likelyLanded: queries._likelyLanded(icao24),
       });
       if (absence === 'retain') continue;
diff --git a/src/sources/live/aircraft.js b/src/sources/live/aircraft.js
index ebc27f559..1af1f6b47 100644
--- a/src/sources/live/aircraft.js
+++ b/src/sources/live/aircraft.js
@@ -7,10 +7,12 @@ import {
   finite,
 } from './contract.js';
 
+const openSkyId = (row) =>
+  Array.isArray(row) ? cleanText(row[0]).toLowerCase() : '';
+
 /** Normalize the OpenSky state-vector route, including its regional fallback. */
 export function normalizeOpenSkyAircraft(row) {
-  if (!Array.isArray(row)) return null;
-  const id = cleanText(row[0]).toLowerCase();
+  const id = openSkyId(row);
   if (!id || !coordinates(row[6], row[5])) return null;
   return {
     id,
@@ -77,6 +79,16 @@ export function normalizeReadsbAircraft(row, snapshotTimeMs) {
   };
 }
 
+/**
+ * OpenSky allows null longitude/latitude for a contact that is still
+ * broadcasting. Strict nulls also reject rows truncated before the position.
+ */
+function openSkyUnpositionedId(row) {
+  return Array.isArray(row) && row[5] === null && row[6] === null
+    ? openSkyId(row)
+    : '';
+}
+
 export function openSkySnapshot(
   payload,
   {
@@ -96,6 +108,7 @@ export function openSkySnapshot(
       return record;
     },
     'OpenSky',
+    openSkyUnpositionedId,
   );
   const observedAtMs = epoch(payload?.time, 1000);
   const ageMs = observedAtMs == null ? null : Math.max(0, now - observedAtMs);
diff --git a/src/sources/live/contract.js b/src/sources/live/contract.js
index 2415ff43c..d99b55f0d 100644
--- a/src/sources/live/contract.js
+++ b/src/sources/live/contract.js
@@ -53,17 +53,30 @@ export function coordinates(latitude, longitude) {
   );
 }
 
-/** Admit a snapshot atomically; an all-invalid nonempty feed is unavailable. */
-export function admitRecords(rows, normalize, label) {
+/**
+ * Admit a snapshot atomically; an all-invalid nonempty feed is unavailable.
+ * `unpositionedId(row)` names a rejected row that is a valid contact without
+ * a position: it is returned in `retainIds` and does not make the snapshot
+ * incomplete.
+ */
+export function admitRecords(rows, normalize, label, unpositionedId) {
   if (!Array.isArray(rows))
     throw new LiveSourceError('malformed', `Malformed ${label} response`);
   const records = [];
   const ids = new Set();
+  const retainIds = new Set();
+  let unpositioned = 0;
   for (const row of rows) {
     const record = normalize(row);
     if (record && !ids.has(record.id)) {
       records.push(record);
       ids.add(record.id);
+    } else if (!record) {
+      const id = unpositionedId?.(row);
+      if (id) {
+        retainIds.add(id);
+        unpositioned += 1;
+      }
     }
   }
   if (rows.length && !records.length) {
@@ -71,7 +84,8 @@ export function admitRecords(rows, normalize, label) {
   }
   return {
     records,
-    complete: records.length === rows.length,
+    retainIds,
+    complete: records.length + unpositioned === rows.length,
     rejectedCount: rows.length - records.length,
   };
 }
diff --git a/src/sources/live/contract.test.mjs b/src/sources/live/contract.test.mjs
index 1bba6e28f..658db1596 100644
--- a/src/sources/live/contract.test.mjs
+++ b/src/sources/live/contract.test.mjs
@@ -67,6 +67,50 @@ test('mixed-invalid and duplicate admissions are explicitly incomplete; all-inva
   assert.equal(openSkySnapshot({ states: [] }).complete, true);
 });
 
+test('position-less OpenSky rows are seen, not missing; malformed rows stay incomplete', () => {
+  // OpenSky's spec allows null longitude/latitude; every live /states/all
+  // carries such rows.
+  const unpositioned = ['DEF456', ...aircraft.slice(1)];
+  unpositioned[5] = null;
+  unpositioned[6] = null;
+  const snapshot = openSkySnapshot({ states: [aircraft, unpositioned] });
+  assert.equal(snapshot.records.length, 1);
+  assert.equal(snapshot.complete, true);
+  assert.deepEqual([...snapshot.retainIds], ['def456']);
+  assert.equal(snapshot.rejectedCount, 1);
+  const malformed = [...aircraft];
+  malformed[5] = 181;
+  const garbled = openSkySnapshot({
+    states: [aircraft, unpositioned, malformed],
+  });
+  assert.equal(garbled.complete, false);
+  assert.deepEqual([...garbled.retainIds], ['def456']);
+  // No usable id, only half a position, a truncated row, or no row at all.
+  for (const row of [
+    [' ', ...unpositioned.slice(1)],
+    Object.assign([...unpositioned], { 5: -97 }),
+    ['DEF456'],
+    null,
+  ])
+    assert.equal(openSkySnapshot({ states: [aircraft, row] }).complete, false);
+  // Repeated position-less rows stay complete.
+  const repeated = openSkySnapshot({
+    states: [aircraft, unpositioned, unpositioned],
+  });
+  assert.equal(repeated.complete, true);
+  // A feed with no positions at all still cannot prove absence.
+  assert.throws(() => openSkySnapshot({ states: [unpositioned] }), {
+    code: 'malformed',
+  });
+  // Military readsb admission keeps its existing semantics.
+  const military = readsbSnapshot(
+    { ac: [{ hex: 'abc123', lat: 30, lon: -97 }, { hex: 'def456' }] },
+    { observedAtMs: null },
+  );
+  assert.equal(military.complete, false);
+  assert.equal(military.retainIds.size, 0);
+});
+
 test('readsb units and position/contact ages are normalized once against the source epoch', () => {
   const row = normalizeReadsbAircraft(
     {