diff --git a/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts b/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
index d87255a01e..6700f07c61 100644
--- a/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
+++ b/frontend/src/__tests__/cypress/cypress/pages/clusterStorage.ts
@@ -48,6 +48,19 @@ class ClusterStorageRow extends TableRow {
   findStorageClassResourceKindText() {
     return cy.findByTestId('resource-kind-text');
   }
+
+  findStorageSizeWarning() {
+    return cy.findByTestId('size-warning-popover').click();
+  }
+
+  findStorageSizeWarningText() {
+    return cy
+      .findByTestId('size-warning-popover-text')
+      .should(
+        'have.text',
+        'To complete the storage size update, you must connect and run a workbench.',
+      );
+  }
 }
 
 class ClusterStorageModal extends Modal {
diff --git a/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts b/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
index 33dddf5e95..4c1b46fbbb 100644
--- a/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
+++ b/frontend/src/__tests__/cypress/cypress/tests/mocked/projects/clusterStorage.cy.ts
@@ -56,6 +56,28 @@ const initInterceptors = ({ isEmpty = false, storageClassName }: HandlersProps)
               storageClassName,
               status: { phase: 'Pending' },
             }),
+            mockPVCK8sResource({
+              displayName: 'Updated storage with no workbench',
+              storageClassName,
+              storage: '13Gi',
+              status: {
+                phase: 'Bound',
+                accessModes: ['ReadWriteOnce'],
+                capacity: {
+                  storage: '12Gi',
+                },
+                conditions: [
+                  {
+                    type: 'FileSystemResizePending',
+                    status: 'True',
+                    lastProbeTime: null,
+                    lastTransitionTime: '2024-11-15T14:04:04Z',
+                    message:
+                      'Waiting for user to (re-)start a pod to finish file system resize of volume on node.',
+                  },
+                ],
+              },
+            }),
           ],
     ),
   );
@@ -334,6 +356,18 @@ describe('ClusterStorage', () => {
     clusterStorage.findClusterStorageTableHeaderButton('Name').should(be.sortDescending);
   });
 
+  it('should show warning when cluster storage size is updated but no workbench is connected', () => {
+    initInterceptors({});
+    clusterStorage.visit('test-project');
+    const clusterStorageRow = clusterStorage.getClusterStorageRow(
+      'Updated storage with no workbench',
+    );
+    clusterStorageRow.toggleExpandableContent();
+    clusterStorageRow.shouldHaveStorageSize('Max 13Gi');
+    clusterStorageRow.findStorageSizeWarning();
+    clusterStorageRow.findStorageSizeWarning().should('exist');
+  });
+
   it('Edit cluster storage', () => {
     initInterceptors({});
     clusterStorage.visit('test-project');
diff --git a/frontend/src/concepts/dashboard/DashboardPopupIconButton.tsx b/frontend/src/concepts/dashboard/DashboardPopupIconButton.tsx
index 9ce1fbd02b..03338f5b0d 100644
--- a/frontend/src/concepts/dashboard/DashboardPopupIconButton.tsx
+++ b/frontend/src/concepts/dashboard/DashboardPopupIconButton.tsx
@@ -3,6 +3,7 @@ import { Button, ButtonProps, Icon } from '@patternfly/react-core';
 
 type DashboardPopupIconButtonProps = Omit<ButtonProps, 'variant' | 'isInline' | 'style'> & {
   icon: React.ReactNode;
+  iconStatus?: 'custom' | 'info' | 'success' | 'warning' | 'danger';
 };
 
 /**
@@ -10,10 +11,11 @@ type DashboardPopupIconButtonProps = Omit<ButtonProps, 'variant' | 'isInline' |
  */
 const DashboardPopupIconButton = ({
   icon,
+  iconStatus,
   ...props
 }: DashboardPopupIconButtonProps): React.JSX.Element => (
   <Button variant="plain" isInline style={{ padding: 0 }} {...props}>
-    <Icon isInline style={{ marginLeft: 'var(--pf-v5-global--spacer--xs)' }}>
+    <Icon isInline style={{ marginLeft: 'var(--pf-v5-global--spacer--xs)' }} status={iconStatus}>
       {icon}
     </Icon>
   </Button>
diff --git a/frontend/src/k8sTypes.ts b/frontend/src/k8sTypes.ts
index b50b48058e..9a7818b168 100644
--- a/frontend/src/k8sTypes.ts
+++ b/frontend/src/k8sTypes.ts
@@ -311,6 +311,7 @@ export type PersistentVolumeClaimKind = K8sResourceCommon & {
     capacity?: {
       storage: string;
     };
+    conditions?: K8sCondition[];
   } & Record<string, unknown>;
 };
 
diff --git a/frontend/src/pages/projects/components/StorageSizeBars.tsx b/frontend/src/pages/projects/components/StorageSizeBars.tsx
index 4a4e6dd199..f9e0e83bdc 100644
--- a/frontend/src/pages/projects/components/StorageSizeBars.tsx
+++ b/frontend/src/pages/projects/components/StorageSizeBars.tsx
@@ -1,6 +1,7 @@
 import * as React from 'react';
 import {
   Bullseye,
+  Popover,
   Progress,
   ProgressMeasureLocation,
   Spinner,
@@ -9,11 +10,12 @@ import {
   Text,
   Tooltip,
 } from '@patternfly/react-core';
-import { ExclamationCircleIcon } from '@patternfly/react-icons';
+import { ExclamationCircleIcon, ExclamationTriangleIcon } from '@patternfly/react-icons';
 import { PersistentVolumeClaimKind } from '~/k8sTypes';
-import { getPvcTotalSize } from '~/pages/projects/utils';
+import { getPvcRequestSize, getPvcTotalSize } from '~/pages/projects/utils';
 import { usePVCFreeAmount } from '~/api';
 import { bytesAsRoundedGiB } from '~/utilities/number';
+import DashboardPopupIconButton from '~/concepts/dashboard/DashboardPopupIconButton';
 
 type StorageSizeBarProps = {
   pvc: PersistentVolumeClaimKind;
@@ -22,6 +24,7 @@ type StorageSizeBarProps = {
 const StorageSizeBar: React.FC<StorageSizeBarProps> = ({ pvc }) => {
   const [inUseInBytes, loaded, error] = usePVCFreeAmount(pvc);
   const maxValue = getPvcTotalSize(pvc);
+  const requestedValue = getPvcRequestSize(pvc);
 
   if (!error && Number.isNaN(inUseInBytes)) {
     return (
@@ -33,6 +36,25 @@ const StorageSizeBar: React.FC<StorageSizeBarProps> = ({ pvc }) => {
     );
   }
 
+  if (pvc.status?.conditions?.find((c) => c.type === 'FileSystemResizePending')) {
+    return (
+      <div>
+        <Text component="small">Max {requestedValue}</Text>
+        <Popover
+          bodyContent="To complete the storage size update, you must connect and run a workbench."
+          data-testid="size-warning-popover-text"
+        >
+          <DashboardPopupIconButton
+            icon={<ExclamationTriangleIcon />}
+            aria-label="Size warning"
+            iconStatus="warning"
+            data-testid="size-warning-popover"
+          />
+        </Popover>
+      </div>
+    );
+  }
+
   const inUseValue = `${bytesAsRoundedGiB(inUseInBytes)}GiB`;
   const percentage = ((parseFloat(inUseValue) / parseFloat(maxValue)) * 100).toFixed(2);
   const percentageLabel = error ? '' : `Storage is ${percentage}% full`;
diff --git a/frontend/src/pages/projects/utils.ts b/frontend/src/pages/projects/utils.ts
index b6b175adf5..05fe6108b1 100644
--- a/frontend/src/pages/projects/utils.ts
+++ b/frontend/src/pages/projects/utils.ts
@@ -9,6 +9,9 @@ export const getNotebookStatusPriority = (notebookState: NotebookState): number
 export const getPvcTotalSize = (pvc: PersistentVolumeClaimKind): string =>
   formatMemory(pvc.status?.capacity?.storage || pvc.spec.resources.requests.storage);
 
+export const getPvcRequestSize = (pvc: PersistentVolumeClaimKind): string =>
+  formatMemory(pvc.spec.resources.requests.storage);
+
 export const getCustomNotebookSize = (
   existingNotebook: NotebookKind | undefined,
 ): NotebookSize => ({