diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d90cec..a72a9a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,11 @@ Versioning: [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
 
 ## [Unreleased]
 
+## [0.3.0] - 2026-04-11
+
+### Added
+- **Snow atmosphere effect** — tsParticles snowfall with size variation for depth, gentle drift, and adjustable intensity (60–300 flakes). Appears in the atmosphere panel between Rain and Embers.
+
 ## [0.2.0] - 2026-04-11
 
 ### Added
diff --git a/docs/HANDBOOK.md b/docs/HANDBOOK.md
index 446df48..2008709 100644
--- a/docs/HANDBOOK.md
+++ b/docs/HANDBOOK.md
@@ -87,6 +87,7 @@ The DM can layer atmosphere effects that all players see in real time:
 - **Fog** — drifting radial-gradient layers with adjustable intensity; fades in smoothly when enabled
 - **Fire** — Three.js GLSL shader with a realistic colour ramp (deep red tips → orange → amber → warm yellow core), per-column height variation for a ragged silhouette, and ember glow at the base
 - **Rain** — translucent blue-white drops that increase in density with intensity; at high intensity the angle tilts slightly, simulating wind-driven rain
+- **Snow** — gentle white flakes with size variation for depth; drift naturally as they fall; density scales with intensity
 - **Embers** — small slow-drifting sparks with flickering opacity; more numerous and finer than rain
 
 Each effect has an independent intensity slider. Atmosphere is DM-only to control; all players see the active effects.
@@ -119,7 +120,6 @@ Features currently planned or in progress:
 - **Creature gallery / NPC system** — saved enemy stat blocks, quick-add to initiative tracker
 - **Initiative enhancements** — turn timer per combatant, re-roll initiative mid-combat, individual initiative mode (each combatant rolls separately, as opposed to team-based; needed for non-Shadowdark systems)
 - **Google / social login** — OAuth alongside the existing email/password flow
-- **Snow atmosphere effect** — tsParticles, evaluating after DM feedback on existing effects
 - **Ambient audio** — optional background sound; low priority
 
 Longer-term ideas: multi-system support (Cairn, Knave, Cyberpunk RED), profile image uploads, metrics and analytics, and API documentation.