diff --git a/GridKit/Model/PhasorDynamics/Controller/REECB/Reecb.hpp b/GridKit/Model/PhasorDynamics/Controller/REECB/Reecb.hpp
index 5cb3d23a9..dbece4fe0 100644
--- a/GridKit/Model/PhasorDynamics/Controller/REECB/Reecb.hpp
+++ b/GridKit/Model/PhasorDynamics/Controller/REECB/Reecb.hpp
@@ -196,7 +196,9 @@ namespace GridKit
         ScalarT& Vi();
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
-        static constexpr RealT VMEAS_MINIMUM         = static_cast<RealT>(0.01);
+        static void            logTimeConstantWarning();
+
+        static constexpr RealT VMEAS_MINIMUM = static_cast<RealT>(0.01);
 
         BusT* bus_{nullptr};
 
diff --git a/GridKit/Model/PhasorDynamics/Controller/REECB/ReecbImpl.hpp b/GridKit/Model/PhasorDynamics/Controller/REECB/ReecbImpl.hpp
index 289e4465a..1d8935425 100644
--- a/GridKit/Model/PhasorDynamics/Controller/REECB/ReecbImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Controller/REECB/ReecbImpl.hpp
@@ -10,6 +10,7 @@
 #include <array>
 #include <cassert>
 #include <limits>
+#include <mutex>
 #include <numbers>
 #include <numeric>
 #include <variant>
@@ -1428,6 +1429,20 @@ namespace GridKit
                       { return y_.getData()[static_cast<size_t>(ReecbInternalVariables::PMEAS)]; });
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Reecb<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Reecb: any of Trv, Tp, Tiq, or Tpord below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s is raised to that floor to keep the controller lags well posed\n";
+      }
+
       /**
        * @brief Resolve parameter-derived constants and selector masks
        *
@@ -1447,9 +1462,9 @@ namespace GridKit
 
         if (floor_warning)
         {
-          Log::warning() << "Reecb: any of Trv, Tp, Tiq, or Tpord below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s is raised to that floor to keep the controller lags well posed\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         va_component_base_ = mva_base_ * static_cast<RealT>(1.0e6);
diff --git a/GridKit/Model/PhasorDynamics/Controller/REPCA/Repca.hpp b/GridKit/Model/PhasorDynamics/Controller/REPCA/Repca.hpp
index 73213d15d..a008f9ef3 100644
--- a/GridKit/Model/PhasorDynamics/Controller/REPCA/Repca.hpp
+++ b/GridKit/Model/PhasorDynamics/Controller/REPCA/Repca.hpp
@@ -161,6 +161,7 @@ namespace GridKit
         ScalarT& Vi();
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         static constexpr RealT INITIALIZATION_LIMIT_OFFSET = static_cast<RealT>(0.1);
 
diff --git a/GridKit/Model/PhasorDynamics/Controller/REPCA/RepcaImpl.hpp b/GridKit/Model/PhasorDynamics/Controller/REPCA/RepcaImpl.hpp
index 74a939ee1..986989776 100644
--- a/GridKit/Model/PhasorDynamics/Controller/REPCA/RepcaImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Controller/REPCA/RepcaImpl.hpp
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <algorithm>
+#include <mutex>
 #include <variant>
 
 #include <GridKit/Model/PhasorDynamics/BusBase.hpp>
@@ -983,6 +984,20 @@ namespace GridKit
                       { return y_.getData()[static_cast<size_t>(RepcaInternalVariables::PMEAS)]; });
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Repca<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Repca: Tfltr, Tfv, Tp, and Tlag below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor to keep the controller lags well posed\n";
+      }
+
       /**
        * @brief Resolve parameter-derived constants
        *
@@ -1012,9 +1027,9 @@ namespace GridKit
         if (Tfltr_ < TIME_CONSTANT_MINIMUM || Tfv_ < TIME_CONSTANT_MINIMUM
             || Tp_ < TIME_CONSTANT_MINIMUM || Tlag_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Repca: Tfltr, Tfv, Tp, and Tlag below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor to keep the controller lags well posed\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         Tfltr_ = std::max(Tfltr_, TIME_CONSTANT_MINIMUM);
diff --git a/GridKit/Model/PhasorDynamics/Converter/REGCA/Regca.hpp b/GridKit/Model/PhasorDynamics/Converter/REGCA/Regca.hpp
index 2bfb937ca..1f8ca99ff 100644
--- a/GridKit/Model/PhasorDynamics/Converter/REGCA/Regca.hpp
+++ b/GridKit/Model/PhasorDynamics/Converter/REGCA/Regca.hpp
@@ -203,6 +203,7 @@ namespace GridKit
         ScalarT& Ii();
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         BusT* bus_{nullptr};
 
diff --git a/GridKit/Model/PhasorDynamics/Converter/REGCA/RegcaImpl.hpp b/GridKit/Model/PhasorDynamics/Converter/REGCA/RegcaImpl.hpp
index 456e5ef75..ace811d53 100644
--- a/GridKit/Model/PhasorDynamics/Converter/REGCA/RegcaImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Converter/REGCA/RegcaImpl.hpp
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <algorithm>
+#include <mutex>
 #include <variant>
 
 #include <GridKit/Model/PhasorDynamics/BusBase.hpp>
@@ -60,6 +61,20 @@ namespace GridKit
       {
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Regca<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Regca: Tg and TM below " << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor to keep the current-control "
+                       << "and voltage-sensor lags well posed\n";
+      }
+
       /**
        * @brief Resolve parameter-derived constants and limiter selections.
        *
@@ -72,9 +87,9 @@ namespace GridKit
       {
         if (Tg_ < TIME_CONSTANT_MINIMUM || TM_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Regca: Tg and TM below " << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor to keep the current-control "
-                         << "and voltage-sensor lags well posed\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         Tg_          = std::max(Tg_, TIME_CONSTANT_MINIMUM);
diff --git a/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1a.hpp b/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1a.hpp
index 5d9e8f36d..3907f616c 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1a.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1a.hpp
@@ -140,6 +140,7 @@ namespace GridKit
         ScalarT& Vi();
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         BusT* bus_{nullptr};
 
diff --git a/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1aImpl.hpp b/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1aImpl.hpp
index 4789ad481..7e408e9be 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1aImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/ESDC1A/Esdc1aImpl.hpp
@@ -8,6 +8,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <mutex>
 #include <variant>
 
 #include <GridKit/Model/PhasorDynamics/BusBase.hpp>
@@ -761,6 +762,20 @@ namespace GridKit
                       { return y_.getData()[static_cast<size_t>(Esdc1aInternalVariables::VFE)]; });
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Esdc1a<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Esdc1a: Tr, Ta, Tb, Te, and Tf1 below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor to keep the exciter lags well posed\n";
+      }
+
       /**
        * @brief Resolve the parameter-derived constants and selector masks
        *
@@ -796,9 +811,9 @@ namespace GridKit
             || Tb_ < TIME_CONSTANT_MINIMUM || Te_ < TIME_CONSTANT_MINIMUM
             || Tf1_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Esdc1a: Tr, Ta, Tb, Te, and Tf1 below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor to keep the exciter lags well posed\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         Tr_  = std::max(Tr_, TIME_CONSTANT_MINIMUM);
diff --git a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
index a86518cca..a0746bb85 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp
@@ -125,6 +125,7 @@ namespace GridKit
 
       private:
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         // Signal pointers
         BusT* bus_;
diff --git a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
index 31f2760d5..8395b275a 100644
--- a/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
+++ b/GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1Impl.hpp
@@ -10,6 +10,7 @@
 #include <algorithm>
 #include <cmath>
 #include <iostream>
+#include <mutex>
 
 #include <GridKit/Model/PhasorDynamics/Bus/Bus.hpp>
 #include <GridKit/Model/PhasorDynamics/Exciter/IEEET1/Ieeet1.hpp>
@@ -491,6 +492,20 @@ namespace GridKit
         setDerivedParameters();
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Ieeet1<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Ieeet1: Tr, Ta, Te, and Tf below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor\n";
+      }
+
       /**
        * @brief Resolve the parameter-derived constants
        */
@@ -500,9 +515,9 @@ namespace GridKit
         if (Tr_ < TIME_CONSTANT_MINIMUM || Ta_ < TIME_CONSTANT_MINIMUM
             || Te_ < TIME_CONSTANT_MINIMUM || Tf_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Ieeet1: Tr, Ta, Te, and Tf below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         Tr_ = std::max(Tr_, TIME_CONSTANT_MINIMUM);
diff --git a/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPti.hpp b/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPti.hpp
index bc824576d..1d593f34e 100644
--- a/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPti.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPti.hpp
@@ -122,6 +122,7 @@ namespace GridKit
         RealT                                     toSystemBase(RealT value) const;
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         RealT R_{static_cast<RealT>(0.05)};
         RealT T1_{static_cast<RealT>(0.4)};
diff --git a/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPtiImpl.hpp b/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPtiImpl.hpp
index 8a58a875a..97f2fe0fd 100644
--- a/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPtiImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPtiImpl.hpp
@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <cassert>
 #include <cmath>
+#include <mutex>
 #include <variant>
 
 #include <GridKit/Model/PhasorDynamics/Governor/GASTPTI/GastPti.hpp>
@@ -712,6 +713,20 @@ namespace GridKit
                       { return y_.getData()[static_cast<size_t>(GastPtiInternalVariables::VTEMP)]; });
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void GastPti<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "GastPti: T1, T2, and T3 below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor to keep the turbine lags well posed\n";
+      }
+
       /**
        * @brief Resolve the parameter-derived constants
        *
@@ -735,9 +750,9 @@ namespace GridKit
 
         if (floor_warning)
         {
-          Log::warning() << "GastPti: T1, T2, and T3 below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor to keep the turbine lags well posed\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         va_component_base_ = ZERO<RealT>;
diff --git a/GridKit/Model/PhasorDynamics/Governor/HYGOV/Hygov.hpp b/GridKit/Model/PhasorDynamics/Governor/HYGOV/Hygov.hpp
index 9844dffd3..8714b691b 100644
--- a/GridKit/Model/PhasorDynamics/Governor/HYGOV/Hygov.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/HYGOV/Hygov.hpp
@@ -152,6 +152,7 @@ namespace GridKit
         ScalarT toSystemBase(ScalarT value) const;
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         /// Accepted seed distance beyond the achievable-power range edge.
         static constexpr RealT INITIALIZATION_TOLERANCE =
diff --git a/GridKit/Model/PhasorDynamics/Governor/HYGOV/HygovImpl.hpp b/GridKit/Model/PhasorDynamics/Governor/HYGOV/HygovImpl.hpp
index 9761ca9c6..5f8dc5ff1 100644
--- a/GridKit/Model/PhasorDynamics/Governor/HYGOV/HygovImpl.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/HYGOV/HygovImpl.hpp
@@ -9,6 +9,7 @@
 #include <algorithm>
 #include <cmath>
 #include <limits>
+#include <mutex>
 #include <numeric>
 #include <variant>
 
@@ -764,6 +765,20 @@ namespace GridKit
                       { return y_.getData()[static_cast<size_t>(HygovInternalVariables::H)]; });
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Hygov<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Hygov: Tr, Tf, Tg, Tw, and Tnp below "
+                       << TIME_CONSTANT_MINIMUM
+                       << " s are raised to preserve Hessenberg form\n";
+      }
+
       /**
        * @brief Resolve the parameter-derived constants
        *
@@ -816,9 +831,9 @@ namespace GridKit
             || Tg_ < TIME_CONSTANT_MINIMUM || Tw_ < TIME_CONSTANT_MINIMUM
             || Tnp_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Hygov: Tr, Tf, Tg, Tw, and Tnp below "
-                         << TIME_CONSTANT_MINIMUM
-                         << " s are raised to preserve Hessenberg form\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         // HYGOV residuals solve explicitly for the state derivatives to preserve
diff --git a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
index 89ce12994..90b2ef79d 100644
--- a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp
@@ -142,6 +142,7 @@ namespace GridKit
         ScalarT toSystemBase(ScalarT value) const;
 
         static constexpr RealT TIME_CONSTANT_MINIMUM = static_cast<RealT>(1.0e-3);
+        static void            logTimeConstantWarning();
 
         /* Local copies of signal variables */
         std::vector<ScalarT> ws_;
diff --git a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
index e7210b462..f1c4360ef 100644
--- a/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
+++ b/GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Impl.hpp
@@ -10,6 +10,7 @@
 
 #include <algorithm>
 #include <limits>
+#include <mutex>
 
 #include <GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1.hpp>
 #include <GridKit/Model/PhasorDynamics/Governor/Tgov1/Tgov1Data.hpp>
@@ -128,13 +129,27 @@ namespace GridKit
         }
       }
 
+      /**
+       * @brief Static method to log time constant warnings
+       *
+       * @note Used in combination with static std:once_flag and std:call_once,
+       *       to reduce the number of times the warning is printed.
+       */
+      template <typename scalar_type, typename index_type>
+      void Tgov1<scalar_type, index_type>::logTimeConstantWarning()
+      {
+        Log::warning() << "Tgov1: T1 and T3 below " << TIME_CONSTANT_MINIMUM
+                       << " s are raised to that floor\n";
+      }
+
       template <typename scalar_type, typename index_type>
       void Tgov1<scalar_type, index_type>::setDerivedParams()
       {
         if (T1_ < TIME_CONSTANT_MINIMUM || T3_ < TIME_CONSTANT_MINIMUM)
         {
-          Log::warning() << "Tgov1: T1 and T3 below " << TIME_CONSTANT_MINIMUM
-                         << " s are raised to that floor\n";
+          static std::once_flag time_constant_warning_flag_;
+          std::call_once(time_constant_warning_flag_,
+                         &logTimeConstantWarning);
         }
 
         T1_ = std::max(T1_, TIME_CONSTANT_MINIMUM);