Version v0.3.2 strengthens the SMART update logic, making pollen forecasts more reliable and easier to use as the new season begins.

With SMART dataset selection, SILAM Pollen no longer relies on a fixed configuration.
Instead, it automatically chooses the most suitable pollen dataset for your location, based on actual coverage — helping ensure that the forecast you see is relevant to where you live.

In practice, this means:

• less manual setup and guesswork,
• fewer cases of misleading or irrelevant pollen data,
• smoother behaviour when datasets change between seasons.

Manual dataset selection is still available, but SMART mode is recommended for everyday use.

🌍 SILAM pollen v6.1 datasets​

This release introduces support for the latest SILAM pollen v6.1 datasets, which form the basis for forecasts in the upcoming pollen seasons.

Compared to previous versions, v6.1 datasets provide:

• updated SILAM v6.1 model outputs for the current season,

• a refreshed European baseline (SILAM Europe pollen v6.1),

• a new high-detail regional dataset where available.

• SILAM Finland pollen v6.1 offers the highest spatial detail within its coverage area
  🟦 Blue zone — coverage of SILAM Finland (v6.1) with up to 0.8 km resolution, especially useful for users in:

  • Finland
  • Saint Petersburg and Northwestern Russia
  • Northern & eastern Sweden (including Stockholm)
  • Northeastern Norway
  • Northern Estonia (including Tallinn and Narva)

When available, this dataset is automatically selected by SMART mode, with manual selection still possible in the integration options.

⚠️ Deprecation​

Version v0.3.1 introduces a major internal improvement in how SILAM Pollen detects and updates forecast data.

The integration is now run-aware and checks the SILAM runs catalog before fetching data. This allows it to reliably determine whether a new model run is actually available, instead of blindly re-downloading the same dataset.

If the current run hasn’t changed:

• cached data is safely reused,
• full XML downloads are skipped,
• and only genuinely missing forecast hours are fetched when the forecast window moves forward.

This results in:

• significantly fewer unnecessary network requests,
• faster and more predictable updates,
• reduced load on both Home Assistant and the SILAM data infrastructure.

These changes are especially important ahead of the pollen season, ensuring timely updates while keeping the integration efficient and robust.

v0.3.0 delivers a cohesive experience: one card brings together weather and pollen with a familiar look, fast response, and clear presentation. The integration now ships with the dashboard card included: a local JS module is bundled — no CDN or external dependencies (you only need to add it once under “Resources”). The Basic panel preserves the simplicity of the stock Weather card, while the Extended panel unfolds all forecast and allergen layers — tidy, informative, and straight to the point.

• 💠 Experimental Lovelace card (local build)

  • Self-contained JS bundle, no CDN, works offline.
  • Built-in visual editor (LitElement) — configure right in the UI.
  • Live WebSocket updates — no polling delays.
  • Automatic i18n: language, formats, and units from Home Assistant.
  • Native MDI icons and theme support.
  • Compatible with any weather.*, shines with weather.silam_pollen_*_forecast.

• 🖼 Basic panel

  • Mirrors the stock Home Assistant Weather card for maximum visual consistency.
  • For current weather, shows current conditions and one primary attribute of your choice — just like the stock card — and additionally lets you select an unlimited number of draggable attributes (toggle row or column layout).
  • When forecast is enabled for SILAM, the forecast row shows the pollen index icon and state instead of weather condition and temperature; for other weather integrations, behavior is identical to the stock card.
  • Supports a scrollable list of forecast slots if they don’t fit horizontally.
  • Number of slots is configurable in the editor: up to 12 via slider or unlimited via manual input.
  • Selecting attributes in the additional block unlocks wide possibilities to visualize weather data the way you like.

• 📊 Extended forecast panel

  • Modes: Standard, Focus, Minimal.

  • 🌿 Allergen-level forecasts

    • A dedicated forecast line for each selected allergen.
    • Peak concentrations highlighted in 12-hour and daily views.
    • Show details on tap on pollen blocks: opens the sensor card for the tapped allergen; behavior is configurable in the editor.
    • Trend logic + icon — clear up/down indication.

  • ⛅ Full forecast layers

    • Temperature and apparent temperature, precipitation (probability and amount), UV index, wind (speed, gust, direction), cloud coverage, humidity, dew point, pressure.
    • Meteo risk strip (experimental): fog (radiation/advection), dew, frost, icing/freezing rain, heavy rain/snow, heat, wind chill, strong/storm wind, “barometric saw”.
    • Slim strips for humidity and dew point, clear labels, refined typography.
    • Gestures: tap / hold / double tap (navigate, link, call service, perform action).

🌿 Updated pollen sensor model​

• 🌸 Pollen Forecast Sensor — now primary and out of beta
• 🗂️ Pollen Index — deprecated
  • Marked as deprecated.
  • Available only via the Legacy toggle (off by default for new installs).
  • Migration preserves compatibility: existing entries get legacy=true.

After its beta period, the forecast sensor is heading for a stable release—bringing more accuracy, data and possibilities for your dashboards.

• 🔄 Re-worked algorithms in "Pollen Forecast BETA"

  • The state now reflects the current pollen index from the now block, not the first hourly step.
  • Hourly forecasts aggregate the index and allergen levels by maximum within each three-hour window (was median).
  • Daily and 12-hour values are calculated using an observational percentile (no interpolation):
    ≥ 18 points → 80th percentile · 12–17 points → 70th · < 12 points → maximum.

• 🌸 Forecast sensor is always created
  Sensor weather.silam_pollen_{Zone Name}_forecast is present regardless of options—now data are always available; hourly, twice-daily (12 h) and daily forecasts appear only when the forecast option is enabled.

• 🌅 Daily forecast & allergen peaks
  The sensor now includes a daily forecast (up to five days) based on the observational percentile.
  New attribute allergen_peaks reports peak allergen concentrations for both daily and twice-daily windows—shown when specific allergens are enabled.

• ➕ New attributes for "Pollen Forecast BETA"
  next_condition, pollen_<allergen>, altitude, date, responsible_elevated—extra context for automations and dashboards.

• ⏱️ Diagnostic sensor “Forecast Horizon”
  The new sensor.silam_pollen_{Zone Name}_forecast_horizon shows how many hours the current forecast (state) actually covers and what forecast length (forecast_duration) you asked for.

• 🖼️ Supported in pollenprognos-card v2.4.1+
  The card now renders the daily forecast via weather.get_forecasts.

  Version compatibility
  • pollenprognos-card ≥ v2.4.1 requires silam_pollen ≥ v0.2.7
  • Older card versions (≤ v2.4.0) remain compatible with silam_pollen ≥ v0.2.5.

• 🆕 native_name Attribute
  All allergen sensors now include a native_name attribute that reflects the original SILAM API key (e.g. alder_m22, grass_m32, etc.), ensuring better compatibility with external tools and visualizations.

• 🔧 Unified entity_id Naming
  Entity IDs (including defaults and resets) now correspond exactly to the keys in the localization files. For example, sensor.silam_pollen_{Zone Name}_grass remains identical across all languages and for every sensor in the integration.

This is a truly significant update for SILAM Pollen!

• 🎉 Default HACS integration
  Congratulations to us all — the integration is now included in the official HACS repository by default, making installation easier than ever!

• 🖼️ Beautiful dashboards
  Great news for dashboard lovers: @krissen has added SILAM Pollen support to the pollenprognos-card (since v2.3.0) — now current conditions and pollen forecasts are available right on your dashboard!
  Learn more here 👈

• 📈 Long-term statistics
  Pollen sensors and the new diagnostic sensor now collect and display historical data.

• 📖 Default README in English
  The README file is now presented in English by default.

• 📦 Prepared for HACS publication
  Changes made to host the integration in the default HACS catalog.
• 🌐 Added Slovak translation
  Thanks to @misa1515 for implementing the Slovak localization!
• 🌐 Added Dutch translation
  Thanks to @rubdos for implementing the Dutch localization!

• ⏱️ Forecast duration setting
  When creating or modifying an entry, you can now choose the forecast duration from 36 to 120 hours (default is 36 h). As the hours increase, the number of forecast points twice a day increases proportionally.
• 🛠️ Diagnostic sensor “fetch_duration”
  A sensor to display the data update execution time (API requests, processing, calculations). Disabled by default.
• 🌐 Added Czech translation
  Thanks to @kasparmir for the first implementation of the Czech localization!

🌸 Pollen Forecast (BETA)

• Hourly and twice-daily pollen forecasts now include values for selected allergens.
• For each pollen sensor, there is now an attribute with the forecast for the next day, showing the daily forecast for the next day, just like for the pollen index.

• 🌍 Support for two SILAM versions
  Ability to choose between SILAM Europe (v6.0) and SILAM Regional (v5.9.1) — with an automatic availability check.
  SILAM Regional (v5.9.1) provides more detailed and accurate forecasts for Northern and Northwestern Europe.

• 🌸 Pollen Forecast (BETA)
  New weather sensor with hourly and twice-daily pollen forecasts via weather.get_forecasts.

• 📊 Unified data handler + update service
  All data are cached through data_processing.py.
  Added service SILAM Pollen monitor: Manual Update — can be called manually or in automations.

• 🎨 Icons for integration and sensors
  Visual indicators are clearer: each allergen now has its own icon.

• 🌐 Localization (in 8 languages)
  The interface is translated into: Russian, English, Finnish, Italian, Swedish, Norwegian, Danish, and German.