diff --git a/docs/forecasts.md b/docs/forecasts.md
index 969035f..b803bc8 100644
--- a/docs/forecasts.md
+++ b/docs/forecasts.md
@@ -28,10 +28,10 @@ interface ForecastItem {
   }
   now?: {
     is_night: boolean
-		now_label: string
-		later_label: string
-		temp_now: number
-		temp_later: number
+    now_label: string
+    later_label: string
+    temp_now: number
+    temp_later: number
   }
 
   date: string
@@ -55,6 +55,27 @@ interface ForecastRequest {
 }
 ```
 
+The `icon_descriptor` field can have these values:
+
+`clear` (Clear sky, typically indicating no clouds),
+`sunny` (Bright and sunny conditions),
+`mostly_sunny` (Predominantly sunny with some clouds),
+`partly_cloudy` (A mix of sun and clouds),
+`cloudy` (Overcast or cloudy skies),
+`rain` (Rainy conditions),
+`shower` (Intermittent or light rain showers),
+`light_rain` (Light rainfall),
+`heavy_shower` (Heavy rain showers),
+`storm` (Stormy conditions, possibly with thunder),
+`cyclone` (Cyclonic conditions or hurricanes),
+`windy` (Strong winds),
+`hazy` (Haze conditions, typically indicating reduced visibility),
+`fog` (Foggy conditions, indicating very low visibility),
+`dusty` (Dusty weather conditions),
+`frost` (Frosty conditions, often with ice formation),
+`snow` (Snowy conditions).
+
+
 ### Example output
 [Jump to finish](#3-hourly)