diff --git a/wxdata/source/scwx/provider/aws_nexrad_data_provider.cpp b/wxdata/source/scwx/provider/aws_nexrad_data_provider.cpp
index 6c749e82..f6dbf79a 100644
--- a/wxdata/source/scwx/provider/aws_nexrad_data_provider.cpp
+++ b/wxdata/source/scwx/provider/aws_nexrad_data_provider.cpp
@@ -20,8 +20,9 @@ static const std::string logPrefix_ =
    "scwx::provider::aws_nexrad_data_provider";
 static const auto logger_ = util::Logger::Create(logPrefix_);
 
-// Keep at least today, yesterday, and one more date
-static const size_t kMinDatesBeforePruning_ = 4;
+// Keep at least today, yesterday, and three more dates (archived volume scan
+// list size)
+static const size_t kMinDatesBeforePruning_ = 6;
 static const size_t kMaxObjects_            = 2500;
 
 class AwsNexradDataProvider::Impl