diff --git a/code/modules/events/supernova.dm b/code/modules/events/supernova.dm
index ca64984cde..6357ec5588 100644
--- a/code/modules/events/supernova.dm
+++ b/code/modules/events/supernova.dm
@@ -56,7 +56,7 @@
 		supernova.power_mod = min(supernova.power_mod*1.2, power)
 	if(activeFor > endWhen-10)
 		supernova.power_mod /= 4
-	if(prob(round(supernova.power_mod*2)) && prob(3) && storm_count < 5 && !SSweather.get_weather_by_type(/datum/weather/rad_storm))
+	if(prob(round(supernova.power_mod)) && prob(3) && storm_count < 5 && !SSweather.get_weather_by_type(/datum/weather/rad_storm))
 		SSweather.run_weather(/datum/weather/rad_storm/supernova)
 		storm_count++