QPESUMS

Tiles of the Central Weather Administration (CWA) QPESUMS precipitation product. In the official app this layer is labeled as a 1-hour precipitation forecast.

Shared rules (coordinates, caching, attribution, and map examples) are in Map tiles.

Data license

Attribution · Commercial use OK
AttributionData: CWA QPESUMS, ExpTech Studio (exptech.dev)

Upstream terms

Central Weather Administration (CWA): CWA's own data terms (such as the Open Government Data License) also apply; CWA's official releases take precedence.

Where to show it, examples and commercial-use requests: Data licensing and attribution.

Authentication

No API Token is required.

Available times

GEThttps://api.core-tnn1.exptech.dev/api/v2/tiles/qpesums/list

Commercial OK

ServerTNN-1

Request

curl "https://api.core-tnn1.exptech.dev/api/v2/tiles/qpesums/list"

const res = await fetch("https://api.core-tnn1.exptech.dev/api/v2/tiles/qpesums/list");
if (!res.ok) throw new Error(`HTTP ${res.status}`);
const data = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://api.core-tnn1.exptech.dev/api/v2/tiles/qpesums/list",
    timeout=10,
)
res.raise_for_status()
print(res.json())

Try it

The official app currently parses the response as the same delta-encoded time list as radar reflectivity: [oldest time, delta, delta, …], in Unix seconds, oldest first. See Map tiles for how to decode it.

Tiles

GEThttps://static.core-tnn1.exptech.dev/api/v2/tiles/qpesums/{time}/{z}/{x}/{y}.webp

Commercial OK

ServerTNN-1

Path parameters

timeintegerRequired
A time from the list.
zintegerRequired
Zoom level (the range is not published).
xintegerRequired
XYZ tile column.
yintegerRequired
XYZ tile row (north to south).

Request

curl -o output.webp "https://static.core-tnn1.exptech.dev/api/v2/tiles/qpesums/<time>/<z>/<x>/<y>.webp"

const res = await fetch("https://static.core-tnn1.exptech.dev/api/v2/tiles/qpesums/<time>/<z>/<x>/<y>.webp");
if (!res.ok) throw new Error(`HTTP ${res.status}`);
const blob = await res.blob();

import requests

res = requests.get(
    "https://static.core-tnn1.exptech.dev/api/v2/tiles/qpesums/<time>/<z>/<x>/<y>.webp",
    timeout=10,
)
res.raise_for_status()
with open("output.webp", "wb") as f:
    f.write(res.content)

Try it

Every tile is under /api/v2/tiles/qpesums/. The {time}/{z}/{x}/{y}.webp shape above is what the official app uses now.

Notes

New list data shows up within about 1 second. The bytes for a tile URL are fixed. A 404 is kept for about 5 seconds.
Use only times from the list. The response for a missing time is not published.
Zoom range, tile size, color scale, and units have no official specification.
On the map, credit the source with the suggested attribution in Data license.