AEMET alert zones — aemet_alert

Retrieves the AEMET geographical zones used for meteorological alerts.

Usage

aemet_alert_zones(verbose = FALSE, return_sf = FALSE)

Source

https://www.aemet.es/es/eltiempo/prediccion/avisos/ayuda. See also Annex 2 and Annex 3 documents, linked from that page.

Arguments

verbose: A logical value. If TRUE, displays information about the exchange between the client and server.
return_sf: A logical value. If TRUE, the function returns an sf spatial object. If FALSE (the default), it returns a tibble. The sf package must be installed.

Value

A tibble or a sf object.

Caching

The first result retrieved in each session is temporarily cached in tempdir() to avoid unnecessary requests.

Examples

library(dplyr)
#> 
#> Attaching package: ‘dplyr’
#> The following objects are masked from ‘package:stats’:
#> 
#>     filter, lag
#> The following objects are masked from ‘package:base’:
#> 
#>     intersect, setdiff, setequal, union
alert_zones <- aemet_alert_zones()
alert_zones
#> # A tibble: 233 × 6
#>    COD_Z  NOM_Z                           COD_PROV NOM_PROV COD_CCAA NOM_CCAA 
#>    <chr>  <chr>                           <chr>    <chr>    <chr>    <chr>    
#>  1 610401 Valle del Almanzora y Los Vélez 6104     Almería  61       Andalucía
#>  2 610402 Nacimiento y Campo de Tabernas  6104     Almería  61       Andalucía
#>  3 610403 Poniente y Almería Capital      6104     Almería  61       Andalucía
#>  4 610404 Levante almeriense              6104     Almería  61       Andalucía
#>  5 611101 Grazalema                       6111     Cádiz    61       Andalucía
#>  6 611102 Campiña gaditana                6111     Cádiz    61       Andalucía
#>  7 611103 Litoral gaditano                6111     Cádiz    61       Andalucía
#>  8 611104 Estrecho                        6111     Cádiz    61       Andalucía
#>  9 611401 Sierra y Pedroches              6114     Córdoba  61       Andalucía
#> 10 611402 Campiña cordobesa               6114     Córdoba  61       Andalucía
#> # ℹ 223 more rows

# Cached during this R session.
alert_zones2 <- aemet_alert_zones(verbose = TRUE)
#> ℹ Loading "alert zones" from a temporary cached file saved at 2026-06-24 14:11:31 UTC.

identical(alert_zones, alert_zones2)
#> [1] TRUE

# Select and map alert zones.
library(ggplot2)

# Galicia.
alert_zones_sf <- aemet_alert_zones(return_sf = TRUE) |>
  filter(COD_CCAA == "71")

# Coast zones have codes ending in "C".
alert_zones_sf$type <- ifelse(grepl("C$", alert_zones_sf$COD_Z),
  "Coast", "Mainland"
)

ggplot(alert_zones_sf) +
  geom_sf(aes(fill = NOM_PROV)) +
  facet_wrap(~type) +
  scale_fill_brewer(palette = "Blues")