diff --git a/scwx-qt/scwx-qt.cmake b/scwx-qt/scwx-qt.cmake
index 74ce7840..ab666399 100644
--- a/scwx-qt/scwx-qt.cmake
+++ b/scwx-qt/scwx-qt.cmake
@@ -90,11 +90,13 @@ set(SRC_MAP source/scwx/qt/map/alert_layer.cpp
             source/scwx/qt/map/radar_product_layer.cpp
             source/scwx/qt/map/radar_range_layer.cpp)
 set(HDR_MODEL source/scwx/qt/model/alert_model.hpp
+              source/scwx/qt/model/alert_proxy_model.hpp
               source/scwx/qt/model/radar_product_model.hpp
               source/scwx/qt/model/radar_site_model.hpp
               source/scwx/qt/model/tree_item.hpp
               source/scwx/qt/model/tree_model.hpp)
 set(SRC_MODEL source/scwx/qt/model/alert_model.cpp
+              source/scwx/qt/model/alert_proxy_model.cpp
               source/scwx/qt/model/radar_product_model.cpp
               source/scwx/qt/model/radar_site_model.cpp
               source/scwx/qt/model/tree_item.cpp
diff --git a/scwx-qt/source/scwx/qt/model/alert_model.cpp b/scwx-qt/source/scwx/qt/model/alert_model.cpp
index 58a4636b..1d380cdb 100644
--- a/scwx-qt/source/scwx/qt/model/alert_model.cpp
+++ b/scwx-qt/source/scwx/qt/model/alert_model.cpp
@@ -21,18 +21,10 @@ namespace model
 static const std::string logPrefix_ = "scwx::qt::model::alert_model";
 static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
 
-static constexpr size_t kColumnEtn          = 0u;
-static constexpr size_t kColumnOfficeId     = 1u;
-static constexpr size_t kColumnPhenomenon   = 2u;
-static constexpr size_t kColumnSignificance = 3u;
-static constexpr size_t kColumnState        = 4u;
-static constexpr size_t kColumnCounties     = 5u;
-static constexpr size_t kColumnStartTime    = 6u;
-static constexpr size_t kColumnEndTime      = 7u;
-static constexpr size_t kColumnDistance     = 8u;
-static constexpr size_t kFirstColumn        = kColumnEtn;
-static constexpr size_t kLastColumn         = kColumnDistance;
-static constexpr size_t kNumColumns         = 9u;
+static constexpr int kFirstColumn = static_cast<int>(AlertModel::Column::Etn);
+static constexpr int kLastColumn =
+   static_cast<int>(AlertModel::Column::Distance);
+static const int kNumColumns = 9;
 
 class AlertModelImpl
 {
@@ -42,8 +34,10 @@ public:
 
    static std::string GetCounties(const types::TextEventKey& key);
    static std::string GetState(const types::TextEventKey& key);
-   static std::string GetStartTime(const types::TextEventKey& key);
-   static std::string GetEndTime(const types::TextEventKey& key);
+   static std::string GetStartTimeString(const types::TextEventKey& key);
+   static std::chrono::system_clock::time_point
+                      GetEndTime(const types::TextEventKey& key);
+   static std::string GetEndTimeString(const types::TextEventKey& key);
 
    std::shared_ptr<manager::TextEventManager> textEventManager_;
 
@@ -95,7 +89,7 @@ int AlertModel::rowCount(const QModelIndex& parent) const
 
 int AlertModel::columnCount(const QModelIndex& parent) const
 {
-   return parent.isValid() ? 0 : static_cast<int>(kNumColumns);
+   return parent.isValid() ? 0 : kNumColumns;
 }
 
 QVariant AlertModel::data(const QModelIndex& index, int role) const
@@ -108,28 +102,44 @@ QVariant AlertModel::data(const QModelIndex& index, int role) const
 
       switch (index.column())
       {
-      case kColumnEtn:
+      case static_cast<int>(Column::Etn):
          return textEventKey.etn_;
-      case kColumnOfficeId:
+
+      case static_cast<int>(Column::OfficeId):
          return QString::fromStdString(textEventKey.officeId_);
-      case kColumnPhenomenon:
+
+      case static_cast<int>(Column::Phenomenon):
          return QString::fromStdString(
             awips::GetPhenomenonText(textEventKey.phenomenon_));
-      case kColumnSignificance:
+
+      case static_cast<int>(Column::Significance):
          return QString::fromStdString(
             awips::GetSignificanceText(textEventKey.significance_));
-      case kColumnState:
+
+      case static_cast<int>(Column::State):
          return QString::fromStdString(AlertModelImpl::GetState(textEventKey));
-      case kColumnCounties:
+
+      case static_cast<int>(Column::Counties):
          return QString::fromStdString(
             AlertModelImpl::GetCounties(textEventKey));
-      case kColumnStartTime:
+
+      case static_cast<int>(Column::StartTime):
          return QString::fromStdString(
-            AlertModelImpl::GetStartTime(textEventKey));
-      case kColumnEndTime:
-         return QString::fromStdString(
-            AlertModelImpl::GetEndTime(textEventKey));
-      case kColumnDistance:
+            AlertModelImpl::GetStartTimeString(textEventKey));
+
+      case static_cast<int>(Column::EndTime):
+         if (role == Qt::DisplayRole)
+         {
+            return QString::fromStdString(
+               AlertModelImpl::GetEndTimeString(textEventKey));
+         }
+         else
+         {
+            return QVariant::fromValue(
+               AlertModelImpl::GetEndTime(textEventKey));
+         }
+
+      case static_cast<int>(Column::Distance):
          if (role == Qt::DisplayRole)
          {
             if (p->distanceDisplay_ == scwx::common::DistanceType::Miles)
@@ -149,6 +159,7 @@ QVariant AlertModel::data(const QModelIndex& index, int role) const
          {
             return p->distanceMap_.at(textEventKey);
          }
+
       default:
          break;
       }
@@ -166,24 +177,33 @@ AlertModel::headerData(int section, Qt::Orientation orientation, int role) const
       {
          switch (section)
          {
-         case kColumnEtn:
+         case static_cast<int>(Column::Etn):
             return tr("ETN");
-         case kColumnOfficeId:
+
+         case static_cast<int>(Column::OfficeId):
             return tr("Office ID");
-         case kColumnPhenomenon:
+
+         case static_cast<int>(Column::Phenomenon):
             return tr("Phenomenon");
-         case kColumnSignificance:
+
+         case static_cast<int>(Column::Significance):
             return tr("Significance");
-         case kColumnState:
+
+         case static_cast<int>(Column::State):
             return tr("State");
-         case kColumnCounties:
+
+         case static_cast<int>(Column::Counties):
             return tr("Counties / Areas");
-         case kColumnStartTime:
+
+         case static_cast<int>(Column::StartTime):
             return tr("Start Time");
-         case kColumnEndTime:
+
+         case static_cast<int>(Column::EndTime):
             return tr("End Time");
-         case kColumnDistance:
+
+         case static_cast<int>(Column::Distance):
             return tr("Distance");
+
          default:
             break;
          }
@@ -267,8 +287,9 @@ void AlertModel::HandleMapUpdate(double latitude, double longitude)
 
    p->previousPosition_ = {latitude, longitude};
 
-   QModelIndex topLeft     = createIndex(0, kColumnDistance);
-   QModelIndex bottomRight = createIndex(rowCount() - 1, kColumnDistance);
+   QModelIndex topLeft = createIndex(0, static_cast<int>(Column::Distance));
+   QModelIndex bottomRight =
+      createIndex(rowCount() - 1, static_cast<int>(Column::Distance));
 
    emit dataChanged(topLeft, bottomRight);
 }
@@ -312,7 +333,7 @@ std::string AlertModelImpl::GetState(const types::TextEventKey& key)
    return util::ToString(lastSegment->header_->ugc_.states());
 }
 
-std::string AlertModelImpl::GetStartTime(const types::TextEventKey& key)
+std::string AlertModelImpl::GetStartTimeString(const types::TextEventKey& key)
 {
    auto  messageList = manager::TextEventManager::Instance()->message_list(key);
    auto& firstMessage = messageList.front();
@@ -321,14 +342,19 @@ std::string AlertModelImpl::GetStartTime(const types::TextEventKey& key)
       firstSegment->header_->vtecString_[0].pVtec_.event_begin());
 }
 
-std::string AlertModelImpl::GetEndTime(const types::TextEventKey& key)
+std::chrono::system_clock::time_point
+AlertModelImpl::GetEndTime(const types::TextEventKey& key)
 {
    auto  messageList = manager::TextEventManager::Instance()->message_list(key);
    auto& lastMessage = messageList.back();
    size_t segmentCount = lastMessage->segment_count();
    auto   lastSegment  = lastMessage->segment(segmentCount - 1);
-   return util::TimeString(
-      lastSegment->header_->vtecString_[0].pVtec_.event_end());
+   return lastSegment->header_->vtecString_[0].pVtec_.event_end();
+}
+
+std::string AlertModelImpl::GetEndTimeString(const types::TextEventKey& key)
+{
+   return util::TimeString(GetEndTime(key));
 }
 
 } // namespace model
diff --git a/scwx-qt/source/scwx/qt/model/alert_model.hpp b/scwx-qt/source/scwx/qt/model/alert_model.hpp
index d15de462..52fd5e1a 100644
--- a/scwx-qt/source/scwx/qt/model/alert_model.hpp
+++ b/scwx-qt/source/scwx/qt/model/alert_model.hpp
@@ -2,6 +2,7 @@
 
 #include <scwx/qt/types/text_event_key.hpp>
 #include <scwx/common/geographic.hpp>
+#include <scwx/util/iterator.hpp>
 
 #include <memory>
 
@@ -19,6 +20,20 @@ class AlertModelImpl;
 class AlertModel : public QAbstractTableModel
 {
 public:
+   enum class Column : int
+   {
+      Etn          = 0,
+      OfficeId     = 1,
+      Phenomenon   = 2,
+      Significance = 3,
+      State        = 4,
+      Counties     = 5,
+      StartTime    = 6,
+      EndTime      = 7,
+      Distance     = 8
+   };
+   typedef util::Iterator<Column, Column::Etn, Column::Distance> ColumnIterator;
+
    explicit AlertModel(QObject* parent = nullptr);
    ~AlertModel();
 
diff --git a/scwx-qt/source/scwx/qt/model/alert_proxy_model.cpp b/scwx-qt/source/scwx/qt/model/alert_proxy_model.cpp
new file mode 100644
index 00000000..b04c21a2
--- /dev/null
+++ b/scwx-qt/source/scwx/qt/model/alert_proxy_model.cpp
@@ -0,0 +1,72 @@
+#include <scwx/qt/model/alert_proxy_model.hpp>
+#include <scwx/qt/model/alert_model.hpp>
+#include <scwx/qt/types/qt_types.hpp>
+#include <scwx/util/logger.hpp>
+
+namespace scwx
+{
+namespace qt
+{
+namespace model
+{
+
+static const std::string logPrefix_ = "scwx::qt::model::alert_proxy_model";
+static const auto        logger_    = scwx::util::Logger::Create(logPrefix_);
+
+class AlertProxyModelImpl
+{
+public:
+   explicit AlertProxyModelImpl();
+   ~AlertProxyModelImpl() = default;
+
+   bool alertActiveFilterEnabled_;
+};
+
+AlertProxyModel::AlertProxyModel(QObject* parent) :
+    QSortFilterProxyModel(parent), p(std::make_unique<AlertProxyModelImpl>())
+{
+}
+AlertProxyModel::~AlertProxyModel() = default;
+
+void AlertProxyModel::SetAlertActiveFilter(bool enabled)
+{
+   p->alertActiveFilterEnabled_ = enabled;
+   invalidateRowsFilter();
+}
+
+bool AlertProxyModel::filterAcceptsRow(int                sourceRow,
+                                       const QModelIndex& sourceParent) const
+{
+   bool acceptAlertActiveFilter = true;
+
+   if (p->alertActiveFilterEnabled_)
+   {
+      // Get source model index
+      QModelIndex endTimeIndex =
+         sourceModel()->index(sourceRow,
+                              static_cast<int>(AlertModel::Column::EndTime),
+                              sourceParent);
+
+      // Get source end time
+      auto endTime = sourceModel()
+                        ->data(endTimeIndex, qt::types::SortRole)
+                        .value<std::chrono::system_clock::time_point>();
+
+      // Compare end time to current
+      if (endTime < std::chrono::system_clock::now())
+      {
+         acceptAlertActiveFilter = false;
+      }
+   }
+
+   return acceptAlertActiveFilter &&
+          QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent);
+}
+
+AlertProxyModelImpl::AlertProxyModelImpl() : alertActiveFilterEnabled_ {false}
+{
+}
+
+} // namespace model
+} // namespace qt
+} // namespace scwx
diff --git a/scwx-qt/source/scwx/qt/model/alert_proxy_model.hpp b/scwx-qt/source/scwx/qt/model/alert_proxy_model.hpp
new file mode 100644
index 00000000..ee8b81c1
--- /dev/null
+++ b/scwx-qt/source/scwx/qt/model/alert_proxy_model.hpp
@@ -0,0 +1,38 @@
+#pragma once
+
+#include <memory>
+
+#include <QSortFilterProxyModel>
+
+namespace scwx
+{
+namespace qt
+{
+namespace model
+{
+
+class AlertProxyModelImpl;
+
+class AlertProxyModel : public QSortFilterProxyModel
+{
+private:
+   Q_DISABLE_COPY(AlertProxyModel)
+
+public:
+   explicit AlertProxyModel(QObject* parent = nullptr);
+   ~AlertProxyModel();
+
+   void SetAlertActiveFilter(bool enabled);
+
+   bool filterAcceptsRow(int                sourceRow,
+                         const QModelIndex& sourceParent) const override;
+
+private:
+   std::unique_ptr<AlertProxyModelImpl> p;
+
+   friend class AlertProxyModelImpl;
+};
+
+} // namespace model
+} // namespace qt
+} // namespace scwx
diff --git a/scwx-qt/source/scwx/qt/ui/alert_dock_widget.cpp b/scwx-qt/source/scwx/qt/ui/alert_dock_widget.cpp
index 1b5370db..23d47767 100644
--- a/scwx-qt/source/scwx/qt/ui/alert_dock_widget.cpp
+++ b/scwx-qt/source/scwx/qt/ui/alert_dock_widget.cpp
@@ -3,12 +3,11 @@
 
 #include <scwx/qt/manager/text_event_manager.hpp>
 #include <scwx/qt/model/alert_model.hpp>
+#include <scwx/qt/model/alert_proxy_model.hpp>
 #include <scwx/qt/types/qt_types.hpp>
 #include <scwx/qt/ui/alert_dialog.hpp>
 #include <scwx/util/logger.hpp>
 
-#include <QSortFilterProxyModel>
-
 namespace scwx
 {
 namespace qt
@@ -27,7 +26,7 @@ public:
        self_ {self},
        textEventManager_ {manager::TextEventManager::Instance()},
        alertModel_ {std::make_unique<model::AlertModel>()},
-       proxyModel_ {std::make_unique<QSortFilterProxyModel>()},
+       proxyModel_ {std::make_unique<model::AlertProxyModel>()},
        alertDialog_ {new AlertDialog(self)},
        mapPosition_ {},
        mapUpdateDeferred_ {false},
@@ -46,7 +45,7 @@ public:
    AlertDockWidget*                           self_;
    std::shared_ptr<manager::TextEventManager> textEventManager_;
    std::unique_ptr<model::AlertModel>         alertModel_;
-   std::unique_ptr<QSortFilterProxyModel>     proxyModel_;
+   std::unique_ptr<model::AlertProxyModel>    proxyModel_;
 
    AlertDialog* alertDialog_;
 
@@ -65,6 +64,9 @@ AlertDockWidget::AlertDockWidget(QWidget* parent) :
    ui->setupUi(this);
 
    ui->alertView->setModel(p->proxyModel_.get());
+   ui->alertView->header()->setSortIndicator(
+      static_cast<int>(model::AlertModel::Column::Distance),
+      Qt::AscendingOrder);
 
    ui->alertSettings->addAction(ui->actionActiveAlerts);
 
@@ -72,6 +74,9 @@ AlertDockWidget::AlertDockWidget(QWidget* parent) :
    ui->alertGoButton->setEnabled(false);
 
    p->ConnectSignals();
+
+   // Check Active Alerts and trigger signal
+   ui->actionActiveAlerts->trigger();
 }
 
 AlertDockWidget::~AlertDockWidget()
@@ -111,6 +116,10 @@ void AlertDockWidgetImpl::ConnectSignals()
            &QLineEdit::textChanged,
            proxyModel_.get(),
            &QSortFilterProxyModel::setFilterWildcard);
+   connect(self_->ui->actionActiveAlerts,
+           &QAction::triggered,
+           proxyModel_.get(),
+           &model::AlertProxyModel::SetAlertActiveFilter);
    connect(textEventManager_.get(),
            &manager::TextEventManager::AlertUpdated,
            alertModel_.get(),