diff --git a/raster_api/runtime/src/cmap_data/README.md b/raster_api/runtime/src/cmap_data/README.md
index 1a489350..1ad7b09e 100644
--- a/raster_api/runtime/src/cmap_data/README.md
+++ b/raster_api/runtime/src/cmap_data/README.md
@@ -109,4 +109,29 @@ for k in texture_categories.keys():
     cmap[int(k)] = np.array(parse_color(texture_categories[k]))
 
 np.save("soil_texture.npy", cmap)
+```
+
+##### Tornadoes colormap
+
+```python
+from rio_tiler.colormap import parse_color
+import numpy as np
+
+# Colormap for Enhanced Fujita (EF) scale ratings
+tornado_ef_scale = {
+    "0": "#add8e6", #EF0
+    "1": "#90ee90", #EF1
+    "2": "#ffe71f", #EF2
+    "3": "#ffa500", #EF3
+    "4": "#ff0000", #EF4
+    "5": "#ff00ff", #EF5
+    "6": "#b3bcc9", #EFU
+}
+
+cmap = np.zeros((256, 4), dtype=np.uint8)
+cmap[:] = np.array([0, 0, 0, 255])
+for k in tornado_ef_scale.keys():
+    cmap[int(k)] = np.array(parse_color(tornado_ef_scale[k]))
+
+np.save("tornado_ef_scale.npy", cmap)
 ```
\ No newline at end of file
diff --git a/raster_api/runtime/src/cmap_data/tornado_ef_scale.npy b/raster_api/runtime/src/cmap_data/tornado_ef_scale.npy
new file mode 100644
index 00000000..f9152814
Binary files /dev/null and b/raster_api/runtime/src/cmap_data/tornado_ef_scale.npy differ