diff --git a/src/app/call/[id].tsx b/src/app/call/[id].tsx
index 172bb3d1..0bcc6b2f 100644
--- a/src/app/call/[id].tsx
+++ b/src/app/call/[id].tsx
@@ -657,7 +657,7 @@ export default function CallDetail() {
 
         {/* Tabs */}
         <Box className="mx-4 mt-3 flex-1 overflow-hidden rounded-xl bg-white pb-8 shadow-xs dark:bg-gray-800">
-          <SharedTabs tabs={renderTabs()} variant="underlined" size={isLandscape ? 'md' : 'sm'} showOverflowIndicators />
+          <SharedTabs tabs={renderTabs()} variant="underlined" size={isLandscape ? 'lg' : 'md'} tabClassName="min-h-11" showOverflowIndicators />
         </Box>
       </ScrollView>
       <CallNotesModal isOpen={isNotesModalOpen} onClose={() => setIsNotesModalOpen(false)} callId={callId} />
diff --git a/src/app/weather-alert/[id].tsx b/src/app/weather-alert/[id].tsx
index b511780f..e368792c 100644
--- a/src/app/weather-alert/[id].tsx
+++ b/src/app/weather-alert/[id].tsx
@@ -37,7 +37,7 @@ export default function WeatherAlertDetail() {
   }, [alertId, fetchAlertDetail]);
 
   const severityColor = useMemo(() => (alert ? getSeverityColor(alert.Severity) : '#9E9E9E'), [alert]);
-  const CategoryIcon = useMemo(() => (alert ? getCategoryIcon(alert.Category) : null), [alert]);
+  const CategoryIcon = useMemo(() => (alert ? getCategoryIcon(alert.AlertCategory) : null), [alert]);
 
   const formatDate = (dateStr: string) => {
     if (!dateStr) return t('call_detail.not_available');
@@ -90,19 +90,19 @@ export default function WeatherAlertDetail() {
           {alert.EffectiveUtc ? (
             <HStack className="justify-between">
               <Text className="text-sm text-gray-500 dark:text-gray-400">{t('weather_alerts.detail.effective')}</Text>
-              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.EffectiveUtc)}</Text>
+              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.EffectiveOnUtc || alert.EffectiveUtc)}</Text>
             </HStack>
           ) : null}
           {alert.OnsetUtc ? (
             <HStack className="justify-between">
               <Text className="text-sm text-gray-500 dark:text-gray-400">{t('weather_alerts.detail.onset')}</Text>
-              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.OnsetUtc)}</Text>
+              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.OnsetOnUtc || alert.OnsetUtc)}</Text>
             </HStack>
           ) : null}
           {alert.ExpiresUtc ? (
             <HStack className="justify-between">
               <Text className="text-sm text-gray-500 dark:text-gray-400">{t('weather_alerts.detail.expires')}</Text>
-              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.ExpiresUtc)}</Text>
+              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{formatDate(alert.ExpiresOnUtc || alert.ExpiresUtc)}</Text>
             </HStack>
           ) : null}
         </VStack>
@@ -125,10 +125,10 @@ export default function WeatherAlertDetail() {
       ) : null}
 
       {/* Instructions */}
-      {alert.Instructions ? (
+      {alert.Instruction ? (
         <Box style={{ borderLeftWidth: 3, borderLeftColor: severityColor }} className="rounded-lg bg-amber-50 p-3 dark:bg-amber-900/20">
           <Text className="mb-1 text-sm font-semibold text-gray-700 dark:text-gray-300">{t('weather_alerts.detail.instructions')}</Text>
-          <Text className="text-sm text-gray-700 dark:text-gray-300">{alert.Instructions}</Text>
+          <Text className="text-sm text-gray-700 dark:text-gray-300">{alert.Instruction}</Text>
         </Box>
       ) : null}
 
@@ -143,10 +143,10 @@ export default function WeatherAlertDetail() {
       {/* Metadata */}
       <Box className="rounded-lg bg-gray-100 p-3 dark:bg-gray-800">
         <VStack space="sm">
-          {alert.SenderName ? (
+          {alert.Sender ? (
             <HStack className="justify-between">
               <Text className="text-sm text-gray-500 dark:text-gray-400">{t('weather_alerts.detail.sender')}</Text>
-              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{alert.SenderName}</Text>
+              <Text className="text-sm font-medium text-gray-900 dark:text-gray-100">{alert.Sender}</Text>
             </HStack>
           ) : null}
           <HStack className="justify-between">
diff --git a/src/components/weather-alerts/__tests__/weather-alert-banner.test.tsx b/src/components/weather-alerts/__tests__/weather-alert-banner.test.tsx
index ee35bc66..d54a4a39 100644
--- a/src/components/weather-alerts/__tests__/weather-alert-banner.test.tsx
+++ b/src/components/weather-alerts/__tests__/weather-alert-banner.test.tsx
@@ -19,27 +19,27 @@ const createMockAlert = (overrides = {}) => ({
   Event: 'Tornado Warning',
   Headline: 'Tornado Warning for County',
   Description: '',
-  Instructions: '',
+  Instruction: '',
   Severity: 0,
-  Category: 0,
+  AlertCategory: 0,
   Urgency: 0,
   Certainty: 0,
   Status: 0,
-  SourceType: 0,
-  SourceAlertId: '',
-  SenderName: '',
+  Sender: '',
   AreaDescription: '',
   Polygon: '',
   CenterGeoLocation: '',
   EffectiveUtc: '',
   OnsetUtc: '',
   ExpiresUtc: '',
-  Ends: '',
-  ReceivedOnUtc: '',
-  UpdatedOnUtc: '',
-  WebUrl: '',
-  ZoneCode: '',
-  MessageType: '',
+  WeatherAlertSourceId: '',
+  ExternalId: '',
+  Geocodes: '',
+  SentUtc: '',
+  FirstSeenUtc: '',
+  LastUpdatedUtc: '',
+  ReferencesExternalId: '',
+  NotificationSent: false,
   ...overrides,
 });
 
diff --git a/src/components/weather-alerts/__tests__/weather-alert-card.test.tsx b/src/components/weather-alerts/__tests__/weather-alert-card.test.tsx
index 8a543b3c..34988450 100644
--- a/src/components/weather-alerts/__tests__/weather-alert-card.test.tsx
+++ b/src/components/weather-alerts/__tests__/weather-alert-card.test.tsx
@@ -29,27 +29,27 @@ const createMockAlert = (overrides = {}) => ({
   Event: 'Tornado Warning',
   Headline: 'Tornado Warning for County',
   Description: 'A tornado has been spotted.',
-  Instructions: 'Take shelter.',
+  Instruction: 'Take shelter.',
   Severity: 1,
-  Category: 0,
+  AlertCategory: 0,
   Urgency: 0,
   Certainty: 0,
   Status: 0,
-  SourceType: 0,
-  SourceAlertId: '',
-  SenderName: 'NWS',
+  Sender: 'NWS',
   AreaDescription: 'County A',
   Polygon: '',
   CenterGeoLocation: '',
   EffectiveUtc: '2026-04-15T10:00:00Z',
   OnsetUtc: '',
   ExpiresUtc: '2026-04-15T14:00:00Z',
-  Ends: '',
-  ReceivedOnUtc: '',
-  UpdatedOnUtc: '',
-  WebUrl: '',
-  ZoneCode: '',
-  MessageType: '',
+  WeatherAlertSourceId: '',
+  ExternalId: '',
+  Geocodes: '',
+  SentUtc: '',
+  FirstSeenUtc: '',
+  LastUpdatedUtc: '',
+  ReferencesExternalId: '',
+  NotificationSent: false,
   ...overrides,
 });
 
diff --git a/src/components/weather-alerts/weather-alert-card.tsx b/src/components/weather-alerts/weather-alert-card.tsx
index bca69cb4..6d083e40 100644
--- a/src/components/weather-alerts/weather-alert-card.tsx
+++ b/src/components/weather-alerts/weather-alert-card.tsx
@@ -17,9 +17,11 @@ interface WeatherAlertCardProps {
 const WeatherAlertCardComponent: React.FC<WeatherAlertCardProps> = ({ alert }) => {
   const { t } = useTranslation();
   const severityColor = getSeverityColor(alert.Severity);
-  const CategoryIcon = getCategoryIcon(alert.Category);
-  const effectiveDate = parseWeatherAlertDate(alert.EffectiveUtc);
-  const expiresDate = parseWeatherAlertDate(alert.ExpiresUtc);
+  const CategoryIcon = getCategoryIcon(alert.AlertCategory);
+  // Prefer the real UTC instants; the *Utc strings are department-local display values that
+  // read hours off when treated as timestamps. Older servers only send the display strings.
+  const effectiveDate = parseWeatherAlertDate(alert.EffectiveOnUtc || alert.EffectiveUtc);
+  const expiresDate = parseWeatherAlertDate(alert.ExpiresOnUtc || alert.ExpiresUtc);
 
   return (
     <Box style={{ borderLeftWidth: 4, borderLeftColor: severityColor }} className="mb-2 rounded-xl bg-white p-3 shadow-xs dark:bg-gray-800">
diff --git a/src/lib/weather-alert-utils.ts b/src/lib/weather-alert-utils.ts
index 9ebdc0ed..86333806 100644
--- a/src/lib/weather-alert-utils.ts
+++ b/src/lib/weather-alert-utils.ts
@@ -200,16 +200,16 @@ export const parseWeatherAlertDate = (dateStr: string): Date | null => {
 export const sortAlertsBySeverity = (alerts: WeatherAlertResultData[]): WeatherAlertResultData[] => {
   return [...alerts].sort((a, b) => {
     if (a.Severity !== b.Severity) return a.Severity - b.Severity;
-    const bEffectiveTime = parseWeatherAlertDate(b.EffectiveUtc)?.getTime() ?? 0;
-    const aEffectiveTime = parseWeatherAlertDate(a.EffectiveUtc)?.getTime() ?? 0;
+    const bEffectiveTime = parseWeatherAlertDate(b.EffectiveOnUtc || b.EffectiveUtc)?.getTime() ?? 0;
+    const aEffectiveTime = parseWeatherAlertDate(a.EffectiveOnUtc || a.EffectiveUtc)?.getTime() ?? 0;
     return bEffectiveTime - aEffectiveTime;
   });
 };
 
 export const isAlertActive = (alert: WeatherAlertResultData): boolean => {
   if (alert.Status !== WeatherAlertStatus.Active) return false;
-  if (alert.ExpiresUtc) {
-    const expiration = parseWeatherAlertDate(alert.ExpiresUtc);
+  if (alert.ExpiresOnUtc || alert.ExpiresUtc) {
+    const expiration = parseWeatherAlertDate(alert.ExpiresOnUtc || alert.ExpiresUtc);
     return expiration ? expiration.getTime() > Date.now() : true;
   }
   return true;
diff --git a/src/models/v4/weatherAlerts/weatherAlertResultData.ts b/src/models/v4/weatherAlerts/weatherAlertResultData.ts
index 4aa0596a..b943e093 100644
--- a/src/models/v4/weatherAlerts/weatherAlertResultData.ts
+++ b/src/models/v4/weatherAlerts/weatherAlertResultData.ts
@@ -1,28 +1,37 @@
+// Mirrors Resgrid Core's v4 WeatherAlertResultData (Web/Resgrid.Web.Services/Models/v4/WeatherAlerts).
+// Enum-valued fields are ints (see WeatherAlertSeverity/Category/Urgency/Certainty/Status in Core).
 export class WeatherAlertResultData {
   public WeatherAlertId: string = '';
   public DepartmentId: number = 0;
+  public WeatherAlertSourceId: string = '';
+  public ExternalId: string = '';
+  public Sender: string = '';
   public Event: string = '';
+  public AlertCategory: number = 4; // Other
+  public Severity: number = 4; // Unknown
+  public Urgency: number = 4; // Unknown
+  public Certainty: number = 4; // Unknown
+  public Status: number = 0; // Active
   public Headline: string = '';
   public Description: string = '';
-  public Instructions: string = '';
-  public Severity: number = 4;
-  public Category: number = 4;
-  public Urgency: number = 4;
-  public Certainty: number = 4;
-  public Status: number = 0;
-  public SourceType: number = 0;
-  public SourceAlertId: string = '';
-  public SenderName: string = '';
+  public Instruction: string = '';
   public AreaDescription: string = '';
   public Polygon: string = '';
+  public Geocodes: string = '';
   public CenterGeoLocation: string = '';
-  public EffectiveUtc: string = '';
+  // Department-local display strings (despite the Utc names) — render verbatim only.
   public OnsetUtc: string = '';
   public ExpiresUtc: string = '';
-  public Ends: string = '';
-  public ReceivedOnUtc: string = '';
-  public UpdatedOnUtc: string = '';
-  public WebUrl: string = '';
-  public ZoneCode: string = '';
-  public MessageType: string = '';
+  public EffectiveUtc: string = '';
+  public SentUtc: string = '';
+  public FirstSeenUtc: string = '';
+  public LastUpdatedUtc: string = '';
+  // Real UTC instants with explicit "Z" — use these for any date math. Empty on older servers.
+  public EffectiveOnUtc?: string = '';
+  public OnsetOnUtc?: string = '';
+  public ExpiresOnUtc?: string = '';
+  public SentOnUtc?: string = '';
+  public ReferencesExternalId: string = '';
+  public NotificationSent: boolean = false;
+  public SystemMessageId?: number;
 }
diff --git a/src/stores/weather-alerts/__tests__/store.test.ts b/src/stores/weather-alerts/__tests__/store.test.ts
index c5705e82..3e92081b 100644
--- a/src/stores/weather-alerts/__tests__/store.test.ts
+++ b/src/stores/weather-alerts/__tests__/store.test.ts
@@ -13,27 +13,27 @@ const createMockAlert = (overrides = {}) => ({
   Event: 'Tornado Warning',
   Headline: 'Tornado Warning for County',
   Description: 'A tornado has been spotted.',
-  Instructions: 'Take shelter immediately.',
+  Instruction: 'Take shelter immediately.',
   Severity: 0,
-  Category: 0,
+  AlertCategory: 0,
   Urgency: 0,
   Certainty: 0,
   Status: 0,
-  SourceType: 0,
-  SourceAlertId: 'nws-1',
-  SenderName: 'NWS',
+  Sender: 'NWS',
   AreaDescription: 'County A',
   Polygon: '',
   CenterGeoLocation: '35.0,-97.0',
   EffectiveUtc: '2026-04-15T10:00:00Z',
   OnsetUtc: '2026-04-15T10:00:00Z',
   ExpiresUtc: '2026-04-15T14:00:00Z',
-  Ends: '',
-  ReceivedOnUtc: '2026-04-15T10:00:00Z',
-  UpdatedOnUtc: '',
-  WebUrl: '',
-  ZoneCode: 'OKC001',
-  MessageType: 'Alert',
+  WeatherAlertSourceId: '',
+  ExternalId: '',
+  Geocodes: '',
+  SentUtc: '',
+  FirstSeenUtc: '',
+  LastUpdatedUtc: '',
+  ReferencesExternalId: '',
+  NotificationSent: false,
   ...overrides,
 });