Providers

The card auto-detects a provider from the entity's attributes, so provider: is almost never needed. Any integration producing a compatible data shape will work — the table below lists the ones that are actually tested.

Provider	Region	Tested integrations
NWS	US	finity69x2/nws_alerts
BoM	Australia	bremor/bureau_of_meteorology, safepay/ha_bom_australia
MeteoAlarm	Europe	Built-in meteoalarm
DWD	Germany	Built-in dwd_weather_warnings
NINA	Germany (civil protection)	Built-in nina — see the note below
MeteoSwiss	Switzerland	izacus/hass-swissweather
ECCC	Canada	seevee/cap_alerts (provider: eccc) — see below
NSW RFS	Australia (NSW)	Built-in nsw_rural_fire_service_feed
PirateWeather	Global	Pirate-Weather/pirate-weather-ha
CAP Alerts	Multi-region	seevee/cap_alerts

How auto-detection works

Each provider has an adapter that converts raw entity attributes into one normalized alert shape, which is all the card UI ever consumes. Detection is by attribute signature — NWS by its Alerts array, BoM by warnings, DWD by warning_count plus region_name, MeteoAlarm by its awareness-level attribute, NINA by recommended_actions plus affected_areas, PirateWeather by its attribution string, and so on.

Set provider: explicitly only if you have a reason to override this.

Per-provider notes

NWS (US)

type: custom:weather-alerts-card
entity: sensor.nws_alerts_alerts

Severity and certainty both come straight from the feed. The recommended integration does not emit zone codes, so zones does not apply to it — use eventCodes to filter instead. Zone codes must be comma-delimited with no spaces when configuring the integration itself (COC059,COZ039); spaces make it silently return nothing.

NWS descriptions arrive hard-wrapped at 69 characters, a teletype legacy. reformatText (on by default) strips those breaks while preserving real paragraphs.

BoM (Australia)

type: custom:weather-alerts-card
entity: sensor.sydney_warnings
provider: bom

Cancelled warnings are filtered out. Severity is inferred from the warning type and group rather than provided — BoM carries no CAP severity field — so badges render with a tilde (~Moderate). Phase badges (New, Updated, Renewed) come from the feed's lifecycle field. issue_time is used as the onset, since BoM issues warnings when the threat is already imminent.

area_id maps to zones for filtering, but only the safepay/ha_bom_australia fork emits it.

MeteoAlarm (Europe)

type: custom:weather-alerts-card
entity: binary_sensor.meteoalarm
colorTheme: meteoalarm

The MeteoAlarm integration exposes a binary_sensor with flat attributes and returns one alert per entity — an upstream library limitation, not a card one. For full multi-alert European coverage, ingest the same feeds through CAP Alerts instead.

Alert text arrives in whatever language the platform's language: option selects, which defaults to English. See Alert text in your own language for that setting and for the title caveat, which depends on your national service rather than on MeteoAlarm.

DWD (Germany)

type: custom:weather-alerts-card
entity: sensor.dwd_weather_warnings_hamburg_current

DWD splits current and advance warnings across two sensors. Merge them:

type: custom:weather-alerts-card
entity: sensor.dwd_weather_warnings_current
entities:
  - sensor.dwd_weather_warnings_advance

NINA (German civil protection)

NINA is the BBK's national warning app. It carries far more than weather: DWD storm and heat warnings, LHP flood warnings, and MoWaS / KATWARN / BIWAPP civil-protection messages (evacuations, hazmat, utility outages) all arrive on the same feed.

The integration creates one binary_sensor per region per message slot, and the slots are pre-created empty. Point the card at the NINA device rather than hand-listing slots — it picks up each slot as a warning lands in it and drops it again when the slot clears:

type: custom:weather-alerts-card
device: 8f2c1e04a9b7d3651fa0c8e29d47b5a3

Listing the slot entities directly works too, and is what you want if you only care about the first slot or two:

type: custom:weather-alerts-card
entity: binary_sensor.mittelfranken_warnung_1
entities:
  - binary_sensor.mittelfranken_warnung_2
  - binary_sensor.mittelfranken_warnung_3

An empty slot reports off with no attributes, which the card reads as "no active alerts" — an all-quiet NINA region is never flagged as an unavailable source. The per-slot diagnostic sensors the integration also creates (sensor.*_headline_1, sensor.*_severity_1, …) hold one value each and are ignored.

Severity is the CAP vocabulary verbatim, so badges render without the inferred-value tilde, and real start / expires timestamps drive the progress bar. Row titles are lifted out of the DWD headline template — "Amtliche WARNUNG vor extremer HITZE" titles the row "Extremer Hitze" and keeps the full headline underneath. Headlines from the non-DWD senders are free prose and pass through unchanged. NINA publishes no geometry, so showGeometry has nothing to draw.

Attribute removal in HA 2026.11

Everything the card reads apart from id is deprecated on the NINA binary sensor and scheduled for removal in Home Assistant 2026.11 (core#161882). The replacement is the per-field diagnostic sensors plus a nina.get_details action; description and recommended_actions got no sensor at all. Card support as described here is correct through HA 2026.10 and will need reworking after that — tracked in #234.

MeteoSwiss (Switzerland)

type: custom:weather-alerts-card
entity: sensor.weather_warnings_at_8000

Point the card at sensor.weather_warnings_at_<postcode>. Severity comes from an integer level; there is no certainty field.

NSW RFS (Australian bushfire)

The nsw_rural_fire_service_feed integration creates one geo_location.* entity per active incident, and that set churns constantly as fires start and clear. Rather than hand-listing volatile entity ids, point the card at the feed:

type: custom:weather-alerts-card
sources:
  - nsw_rural_fire_service_feed

nsw_rural_fire_service_feed is the source state attribute each incident entity carries, so the value maps one-to-one to what you see on the entity. In the visual editor this is the Auto-collect from installed feeds checkbox. You can still hand-list specific incidents under entities:, or group them with device:, for a fixed subset.

Severity comes straight from the incident category — the Australian Warning System ladder (Emergency Warning / Watch and Act / Advice). Two consequences worth knowing:

• Incidents have no real expiry, so the card shows an honest "ongoing" state with no progress bar rather than inventing a countdown.
• showGeometry is unavailable — the entity carries only a point, not the fire-ground polygon.

That point does drive one thing: maxDistanceKm trims a statewide feed to incidents within a given number of kilometres of your Home Assistant home location. It is opt-in, always expressed in km in YAML, and has no effect on area-warning providers.

type: custom:weather-alerts-card
sources:
  - nsw_rural_fire_service_feed
maxDistanceKm: 50

The card filter only narrows — check the integration's radius first

nsw_rural_fire_service_feed has its own radius option, default 20 km, measured from the same Home Assistant home location. Incidents beyond it never reach the card at all, so maxDistanceKm can only trim that set further, never widen it. On the default, a card set to maxDistanceKm: 50 changes nothing — raise the integration's radius to see incidents further out. The card-side filter is for narrowing per card without touching the integration.

PirateWeather

type: custom:weather-alerts-card
entity: sensor.pirateweather_alerts

CAP Alerts (multi-region)

The CAP Alerts integration creates one sensor per active alert under a Home Assistant device. Point the card at the device and it picks up every active alert automatically, re-discovering them as alerts are issued and cleared:

type: custom:weather-alerts-card
device: 1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d

Pick the device from the editor's CAP Alerts device selector rather than hand-typing the id. device can coexist with entities: for mixed setups.

It ingests any CAP 1.2 feed — NWS, ECCC, MeteoAlarm, and the WMO Severe Weather Information Centre firehose for countries with no dedicated integration. Because it carries raw CAP fields and the original alert polygons, it is the only source that unlocks the showGeometry mini-map, and the only one with a per-alert entity for tap_action: more-info to target.

Canada: ECCC via CAP Alerts

For Environment and Climate Change Canada alerts, CAP Alerts (provider: eccc) is the source to use. It ingests the NAAD CAP firehose, creating one sensor per active alert under a device. That carries raw CAP severity and certainty, preserves the original multi-region polygons, and unlocks the affected-area mini-map.

type: custom:weather-alerts-card
device: 1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d
colorTheme: eccc      # ECCC's official red/orange/yellow/grey palette
showGeometry: true    # affected-area mini-map

The provider auto-detects as eccc; set provider: eccc explicitly only if you have disabled auto-detection.

Why not the other ECCC integrations?

Two others exist, and neither is the right source for this card.

• HA core environment_canada exposes rich alert detail only through a get_alertsaction (#172393, merged in place of the attribute-based #164481). A Lovelace card reads state and attributes during render and cannot consume an action response, so core simply cannot drive this card.
• The HACS environment_canada fork does surface alert attributes, but it is a stop-gap its own maintainer would rather not keep running (see discussion #3130), and it overrides the core integration's domain. Out of respect for that, ECCC users are not routed to it.

If you also run environment_canada for weather

Its alert list (GeoMet WFS, filtered by a point-in-polygon test against your coordinates) will not line up with CAP Alerts' (NAAD CAP polygons, ingested directly). The WFS feed lags and truncates NAAD coverage, so an alert can appear in one and not the other. That is upstream behaviour, not the card.

Data fidelity

Severity and certainty badges are always localized to your configured language. When a value was inferred by the card's adapter rather than provided by the source, it is rendered in italics with a tilde prefix (~Moderate) — so you can tell at a glance which badges reflect real provider data.

Provider	Severity	Certainty
NWS	Raw (from Severity)	Raw (from Certainty)
BoM	Inferred (parsed from title/type/group)	Absent
MeteoAlarm	Raw (from awareness_level or severity)	Raw (from certainty)
DWD	Raw (from integer level)	Absent
NINA	Raw (CAP vocabulary from severity)	Absent
MeteoSwiss	Raw (from integer level)	Absent
ECCC	Derived (max of color, type, impact; tilde only when all three are absent)	Mapped from confidence (High → Likely, Moderate → Possible, Low → Unlikely)
NSW RFS	Raw (from category)	Absent
PirateWeather	Raw (from severity)	Absent
CAP Alerts	Raw (from severity_normalized / severity)	Raw (from certainty)