diff --git a/public/app/features/alerting/unified/integration/AlertRulesDrawerContent.tsx b/public/app/features/alerting/unified/integration/AlertRulesDrawerContent.tsx
index d3b0ea88796..3c13303b960 100644
--- a/public/app/features/alerting/unified/integration/AlertRulesDrawerContent.tsx
+++ b/public/app/features/alerting/unified/integration/AlertRulesDrawerContent.tsx
@@ -2,7 +2,8 @@ import React from 'react';
 import { useAsync } from 'react-use';
 
 import { LoadingPlaceholder } from '@grafana/ui';
-import { useDispatch } from 'app/types';
+import { getDashboardScenePageStateManager } from 'app/features/dashboard-scene/pages/DashboardScenePageStateManager';
+import { DashboardRoutes, useDispatch } from 'app/types';
 
 import { RulesTable } from '../components/rules/RulesTable';
 import { useCombinedRuleNamespaces } from '../hooks/useCombinedRuleNamespaces';
@@ -10,14 +11,26 @@ import { fetchPromAndRulerRulesAction } from '../state/actions';
 import { Annotation } from '../utils/constants';
 import { GRAFANA_RULES_SOURCE_NAME } from '../utils/datasource';
 
+import LegacyAlertsDeprecationNotice from './LegacyAlertsDeprecationNotice';
+
 interface Props {
   dashboardUid: string;
 }
 
 export default function AlertRulesDrawerContent({ dashboardUid }: Props) {
   const dispatch = useDispatch();
+  const dashboardStateManager = getDashboardScenePageStateManager();
 
-  const { loading } = useAsync(async () => {
+  const { value: dashboard, loading: loadingDashboardState } = useAsync(() => {
+    return dashboardStateManager
+      .fetchDashboard({
+        uid: dashboardUid,
+        route: DashboardRoutes.Normal,
+      })
+      .then((data) => (data ? data.dashboard : undefined));
+  }, [dashboardStateManager]);
+
+  const { loading: loadingAlertRules } = useAsync(async () => {
     await dispatch(fetchPromAndRulerRulesAction({ rulesSourceName: GRAFANA_RULES_SOURCE_NAME }));
   }, [dispatch]);
 
@@ -27,12 +40,17 @@ export default function AlertRulesDrawerContent({ dashboardUid }: Props) {
     .flatMap((g) => g.rules)
     .filter((rule) => rule.annotations[Annotation.dashboardUID] === dashboardUid);
 
+  const loading = loadingDashboardState || loadingAlertRules;
+
   return (
     <>
       {loading ? (
         <LoadingPlaceholder text="Loading alert rules" />
       ) : (
-        <RulesTable rules={rules} showNextEvaluationColumn={false} showGroupColumn={false} />
+        <>
+          <LegacyAlertsDeprecationNotice dashboard={dashboard} />
+          <RulesTable rules={rules} showNextEvaluationColumn={false} showGroupColumn={false} />
+        </>
       )}
     </>
   );
diff --git a/public/app/features/alerting/unified/integration/LegacyAlertsDeprecationNotice.tsx b/public/app/features/alerting/unified/integration/LegacyAlertsDeprecationNotice.tsx
new file mode 100644
index 00000000000..66fa4595f03
--- /dev/null
+++ b/public/app/features/alerting/unified/integration/LegacyAlertsDeprecationNotice.tsx
@@ -0,0 +1,92 @@
+import { isEmpty } from 'lodash';
+import React from 'react';
+import { useToggle } from 'react-use';
+
+import { config } from '@grafana/runtime';
+import { Dashboard, Panel, RowPanel } from '@grafana/schema';
+import { Alert, Collapse, Column, InteractiveTable, TextLink } from '@grafana/ui';
+
+import { makePanelLink } from '../utils/misc';
+
+interface DeprecationNoticeProps {
+  dashboard: Dashboard;
+}
+
+const usingLegacyAlerting = !config.unifiedAlertingEnabled;
+
+export default function LegacyAlertsDeprecationNotice({ dashboard }: DeprecationNoticeProps) {
+  // if the user is still using legacy alerting we don't need to show any notice at all – they will probably keep using legacy alerting and do not intend to upgrade.
+  if (usingLegacyAlerting) {
+    return null;
+  }
+
+  const panelsWithLegacyAlerts = getLegacyAlertPanelsFromDashboard(dashboard);
+
+  // don't show anything when the user has no legacy alerts defined
+  const hasLegacyAlerts = !isEmpty(panelsWithLegacyAlerts);
+  if (!hasLegacyAlerts) {
+    return null;
+  }
+
+  return dashboard.uid ? <LegacyAlertsWarning dashboardUid={dashboard.uid} panels={panelsWithLegacyAlerts} /> : null;
+}
+
+/**
+ * This function uses two different ways to detect legacy alerts based on what dashboard system is being used.
+ *
+ * 1. if using the older (non-scenes) dashboard system we can simply check for "alert" in the panel definition.
+ * 2. for dashboard scenes the alerts are no longer added to the model but we can check for "alertThreshold" in the panel options object
+ */
+function getLegacyAlertPanelsFromDashboard(dashboard: Dashboard): Panel[] {
+  const panelsWithLegacyAlerts = dashboard.panels?.filter((panel) => {
+    const hasAlertDefinition = 'alert' in panel;
+    const hasAlertThreshold = 'options' in panel && panel.options ? 'alertThreshold' in panel.options : false;
+    return hasAlertDefinition || hasAlertThreshold;
+  });
+
+  return panelsWithLegacyAlerts ?? [];
+}
+
+interface Props {
+  dashboardUid: string;
+  panels: Panel[];
+}
+
+function LegacyAlertsWarning({ dashboardUid, panels }: Props) {
+  const [isOpen, toggleCollapsible] = useToggle(false);
+
+  const columns: Array<Column<Panel | RowPanel>> = [
+    { id: 'id', header: 'ID' },
+    {
+      id: 'title',
+      header: 'Title',
+      cell: (cell) => (
+        <TextLink
+          external
+          href={makePanelLink(dashboardUid, String(cell.row.id), { editPanel: cell.row.id, tab: 'alert' })}
+        >
+          {cell.value}
+        </TextLink>
+      ),
+    },
+  ];
+
+  return (
+    <Alert severity="warning" title="Legacy alert rules are deprecated">
+      <p>
+        You have legacy alert rules in this dashboard that were deprecated in Grafana 11 and are no longer supported.
+      </p>
+      <p>
+        Refer to{' '}
+        <TextLink href="https://grafana.com/docs/grafana/latest/alerting/set-up/migrating-alerts/" external>
+          our documentation
+        </TextLink>{' '}
+        on how to migrate legacy alert rules and how to import and export using Grafana Alerting.
+      </p>
+
+      <Collapse label={'List of panels using legacy alerts'} collapsible isOpen={isOpen} onToggle={toggleCollapsible}>
+        <InteractiveTable columns={columns} data={panels} getRowId={(panel) => String(panel.id)} pageSize={5} />
+      </Collapse>
+    </Alert>
+  );
+}
diff --git a/public/app/features/alerting/unified/utils/misc.ts b/public/app/features/alerting/unified/utils/misc.ts
index e8e1a7e8dcb..2fd698b3796 100644
--- a/public/app/features/alerting/unified/utils/misc.ts
+++ b/public/app/features/alerting/unified/utils/misc.ts
@@ -157,8 +157,15 @@ export function makeDashboardLink(dashboardUID: string): string {
   return createUrl(`/d/${encodeURIComponent(dashboardUID)}`);
 }
 
-export function makePanelLink(dashboardUID: string, panelId: string): string {
-  return createUrl(`/d/${encodeURIComponent(dashboardUID)}`, { viewPanel: panelId });
+type PanelLinkParams = {
+  viewPanel?: string;
+  editPanel?: string;
+  tab?: 'alert' | 'transform' | 'query';
+};
+
+export function makePanelLink(dashboardUID: string, panelId: string, queryParams: PanelLinkParams = {}): string {
+  const panelParams = new URLSearchParams(queryParams);
+  return createUrl(`/d/${encodeURIComponent(dashboardUID)}`, panelParams);
 }
 
 // keep retrying fn if it's error passes shouldRetry(error) and timeout has not elapsed yet
diff --git a/public/app/features/dashboard-scene/settings/JsonModelEditView.tsx b/public/app/features/dashboard-scene/settings/JsonModelEditView.tsx
index bd7626b5d61..819d5704ad5 100644
--- a/public/app/features/dashboard-scene/settings/JsonModelEditView.tsx
+++ b/public/app/features/dashboard-scene/settings/JsonModelEditView.tsx
@@ -3,9 +3,11 @@ import React from 'react';
 
 import { GrafanaTheme2, PageLayoutType } from '@grafana/data';
 import { SceneComponentProps, SceneObjectBase, sceneUtils } from '@grafana/scenes';
+import { Dashboard } from '@grafana/schema';
 import { Button, CodeEditor, useStyles2 } from '@grafana/ui';
 import { Page } from 'app/core/components/Page/Page';
 import { Trans } from 'app/core/internationalization';
+import LegacyAlertsDeprecationNotice from 'app/features/alerting/unified/integration/LegacyAlertsDeprecationNotice';
 import { getPrettyJSON } from 'app/features/inspector/utils/utils';
 import { DashboardDTO } from 'app/types';
 
@@ -38,9 +40,13 @@ export class JsonModelEditView extends SceneObjectBase<JsonModelEditViewState> i
     return getDashboardSceneFor(this);
   }
 
-  public getJsonText(): string {
+  public getSaveModel(): Dashboard {
     const dashboard = this.getDashboard();
-    const jsonData = transformSceneToSaveModel(dashboard);
+    return transformSceneToSaveModel(dashboard);
+  }
+
+  public getJsonText(): string {
+    const jsonData = this.getSaveModel();
     return getPrettyJSON(jsonData);
   }
 
@@ -67,6 +73,7 @@ export class JsonModelEditView extends SceneObjectBase<JsonModelEditViewState> i
     const { jsonText } = model.useState();
 
     const styles = useStyles2(getStyles);
+    const saveModel = model.getSaveModel();
 
     return (
       <Page navModel={navModel} pageNav={pageNav} layout={PageLayoutType.Standard}>
@@ -76,6 +83,7 @@ export class JsonModelEditView extends SceneObjectBase<JsonModelEditViewState> i
             The JSON model below is the data structure that defines the dashboard. This includes dashboard settings,
             panel settings, layout, queries, and so on.
           </Trans>
+          <LegacyAlertsDeprecationNotice dashboard={saveModel} />
           <CodeEditor
             width="100%"
             value={jsonText}
diff --git a/public/app/features/dashboard/components/DashboardSettings/JsonEditorSettings.tsx b/public/app/features/dashboard/components/DashboardSettings/JsonEditorSettings.tsx
index c4b1a71db92..dbc6b22ca86 100644
--- a/public/app/features/dashboard/components/DashboardSettings/JsonEditorSettings.tsx
+++ b/public/app/features/dashboard/components/DashboardSettings/JsonEditorSettings.tsx
@@ -5,6 +5,7 @@ import { GrafanaTheme2 } from '@grafana/data';
 import { Button, CodeEditor, useStyles2 } from '@grafana/ui';
 import { Page } from 'app/core/components/Page/Page';
 import { Trans } from 'app/core/internationalization';
+import LegacyAlertsDeprecationNotice from 'app/features/alerting/unified/integration/LegacyAlertsDeprecationNotice';
 import { dashboardWatcher } from 'app/features/live/dashboard/dashboardWatcher';
 
 import { getDashboardSrv } from '../../services/DashboardSrv';
@@ -12,7 +13,8 @@ import { getDashboardSrv } from '../../services/DashboardSrv';
 import { SettingsPageProps } from './types';
 
 export function JsonEditorSettings({ dashboard, sectionNav }: SettingsPageProps) {
-  const [dashboardJson, setDashboardJson] = useState<string>(JSON.stringify(dashboard.getSaveModelClone(), null, 2));
+  const dashboardSaveModel = dashboard.getSaveModelClone();
+  const [dashboardJson, setDashboardJson] = useState<string>(JSON.stringify(dashboardSaveModel, null, 2));
   const pageNav = sectionNav.node.parentItem;
 
   const onClick = async () => {
@@ -29,6 +31,7 @@ export function JsonEditorSettings({ dashboard, sectionNav }: SettingsPageProps)
           The JSON model below is the data structure that defines the dashboard. This includes dashboard settings, panel
           settings, layout, queries, and so on.
         </Trans>
+        <LegacyAlertsDeprecationNotice dashboard={dashboardSaveModel} />
         <CodeEditor
           value={dashboardJson}
           language="json"