diff --git a/python/cac_tripplanner/templates/base.html b/python/cac_tripplanner/templates/base.html
index 4c79e5f3..b7807a6d 100644
--- a/python/cac_tripplanner/templates/base.html
+++ b/python/cac_tripplanner/templates/base.html
@@ -172,14 +172,18 @@
         jQuery.noConflict(); // because JotForms.
         // Hide top alert banner across pages on close
         jQuery(document).ready(function ($) {
-            const hideBanner = localStorage.getItem('hide-top-alert-banner') || false;
-            if(!hideBanner){
+            // update this for every new alert to match id in alert-banner.html
+            var alertId = 'gophillygo-alert-2024-01-12',
+              hasAlertMessage = jQuery('.alert-body').text().trim(),
+              wasAlreadyHidden = localStorage.getItem(alertId) || false,
+              shouldShowBanner = hasAlertMessage && !wasAlreadyHidden;
+            if(shouldShowBanner){
                 jQuery('.nav-banner').removeClass('hidden');
             };
 
             jQuery('.nav-banner').on('click', function(e) {
                 e.stopPropagation();
-                localStorage.setItem('hide-top-alert-banner', true);
+                localStorage.setItem(alertId, true);
                 jQuery('.nav-banner').addClass('hidden');
             });
         });
diff --git a/python/cac_tripplanner/templates/partials/alert-banner.html b/python/cac_tripplanner/templates/partials/alert-banner.html
index b05b5b58..dfcce602 100644
--- a/python/cac_tripplanner/templates/partials/alert-banner.html
+++ b/python/cac_tripplanner/templates/partials/alert-banner.html
@@ -1,5 +1,9 @@
 <div class="nav-banner alert-warning hidden">
-    <div class="alert-body">Message for all of our Android app users: after January 1, 2024, we will no longer be supporting the app, but the GoPhillyGo mobile website will continue to be available across all devices.</div>
+    <div class="alert-body">
+        <!-- Alert ID gophillygo-alert-2024-01-12 -->
+        <!-- Add text here and update the Alert ID comment above to match
+        alertId in base.html. Will show an alert at the top of the page. -->
+        </div>
     <button title="Dismiss this message" name="close"
         class="btn-dismiss-nav-banner"><i class="icon-cancel"></i>
     </button>