diff --git a/development/migrations/2026_01_13_add_conditionals_to_spot_input_flame_length.clj b/development/migrations/2026_01_13_add_conditionals_to_spot_input_flame_length.clj
new file mode 100644
index 00000000..8434a479
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+++ b/development/migrations/2026_01_13_add_conditionals_to_spot_input_flame_length.clj
@@ -0,0 +1,68 @@
+(ns migrations.2026-01-13-add-conditionals-to-spot-input-flame-length
+  (:require [schema-migrate.interface :as sm]
+            [datomic.api :as d]
+            [behave-cms.store :refer [default-conn]]
+            [behave-cms.server :as cms]))
+
+;; ===========================================================================================================
+;; Overview
+;; ===========================================================================================================
+
+;; ===========================================================================================================
+;; Initialize
+;; ===========================================================================================================
+
+(cms/init-db!)
+
+#_{:clj-kondo/ignore [:missing-docstring]}
+(def conn (default-conn))
+
+;; ===========================================================================================================
+;; Payload
+;; ===========================================================================================================
+
+#_{:clj-kondo/ignore [:missing-docstring]}
+(def conditionals-to-add
+  (map
+   #(sm/->conditional conn
+                      {:ttype               :group-variable
+                       :operator            :equal
+                       :values              #{"false"}
+                       :group-variable-uuid %})
+   (map #(sm/t-key->uuid conn %)
+        ["behaveplus:surface:output:fire_behavior:surface_fire:rate_of_spread"
+         "behaveplus:surface:output:fire_behavior:surface_fire:flame_length"
+         "behaveplus:surface:output:fire_behavior:surface_fire:fireline_intensity"
+         "behaveplus:surface:output:fire_behavior:ignition"
+         "behaveplus:surface:output:size:surface___fire_size:fire_perimeter"
+         "behaveplus:surface:output:size:surface___fire_size:fire_area"
+         "behaveplus:surface:output:size:surface___fire_size:length-to-width-ratio"
+         "behaveplus:surface:output:size:surface___fire_size:spread-distance"
+         "behaveplus:surface:output:size:surface___fire_size:fire-shape-diagram"
+         "behaveplus:surface:output:size:surface___fire_size:fire_area"
+         "behaveplus:surface:output:spot:burning_pile"
+         "behaveplus:surface:output:wind-and-fuel:fuel:total-dead-herbaceous-fuel-load"
+         "behaveplus:surface:output:wind-and-fuel:fuel:total-dead-fuel-load"
+         "behaveplus:surface:output:wind-and-fuel:fuel:total-live-fuel-load"
+         "behaveplus:surface:output:wind-and-fuel:wind:midflame-eye-level-wind-speed"])))
+
+#_{:clj-kondo/ignore [:missing-docstring]}
+(def payload
+  [{:db/id              (sm/t-key->eid conn "behaveplus:surface:input:spot:surface-fire-flame-length")
+    :group/conditionals conditionals-to-add}])
+
+;; ===========================================================================================================
+;; Transact Payload
+;; ===========================================================================================================
+
+(comment
+  #_{:clj-kondo/ignore [:missing-docstring]}
+  (try (def tx-data @(d/transact conn payload))
+       (catch Exception e  (str "caught exception: " (.getMessage e)))))
+
+;; ===========================================================================================================
+;; In case we need to rollback.
+;; ===========================================================================================================
+
+(comment
+  (sm/rollback-tx! conn tx-data))