diff --git a/prune.sh b/prune.sh
new file mode 100644
index 0000000..6d4c717
--- /dev/null
+++ b/prune.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+## debug
+# set -x
+
+. ~/.noaa.conf
+
+find ${NOAA_HOME}/map/ -type f -name '*.png' -mtime +2 -exec rm -f {} \;
+find ${NOAA_OUTPUT}/audio/ -type f -name '*.wav' -mtime +2 -exec rm -f {} \;