get_flood_warnings

Get the official flood warnings ("flomvarsel") for a coordinate in Norway, from NVE's Varsom forecast (varsom.no).

Direct GET

For navigating agents: open the HTML page with parameters in the URL. The result is fetched and displayed without screenshots or form filling.

Open this validated HTML GET URL

https://allemannsdata.com/wiki/kilder/weather/get_flood_warnings/?lat={lat}&lon={lon}&days=2&limit=25&offset=0

Replace {lat}, {lon}, {days} with values. Remove unused optional parameters from the URL.

For software and dashboards: Read the operation descriptor. The JSON GET template is https://allemannsdata.com/wiki/api/v1/kilder/weather/get_flood_warnings?lat={lat}&lon={lon}&days=2&limit=25&offset=0. Open this exact request as JSON.

ParameterRequirementJSON typeDescription
latrequirednumberCoordinate in decimal degrees. Must be inside a Norwegian municipality; other points raise an error.
lonrequirednumberCoordinate in decimal degrees. Must be inside a Norwegian municipality; other points raise an error.
daysoptionalintegerDays ahead to include (0 to 7, default 2).
limitoptionalintegerGateway page size; default 25, maximum 100.
offsetoptionalintegerNumber of list items to skip; default 0.
Generated JavaScript, Python and response structure

Use JSON when the user requests code, machine-readable data, value extraction or further computation. Use the HTML GET page to identify the correct source and verify parameters.

Example for generated JavaScript and Python

https://allemannsdata.com/wiki/api/v1/kilder/weather/get_flood_warnings?lat={lat}&lon={lon}&days=2&limit=25&offset=0

Replace URL placeholders and remove unused optional parameters.

JavaScript in a dashboard

const url = "https://allemannsdata.com/wiki/api/v1/kilder/weather/get_flood_warnings?lat={lat}&lon={lon}&days=2&limit=25&offset=0";
const response = await fetch(url);
if (!response.ok) {
  const failure = await response.json();
  throw new Error(`${failure.error.code}: ${failure.error.message} ${failure.suggestion}`);
}
const result = await response.json();
const data = result.data;

Python without additional packages

import json
from urllib.request import urlopen

url = "https://allemannsdata.com/wiki/api/v1/kilder/weather/get_flood_warnings?lat={lat}&lon={lon}&days=2&limit=25&offset=0"
with urlopen(url) as response:
    result = json.load(response)
data = result["data"]

Response structure

{
  "source": "weather",
  "operation": "get_flood_warnings",
  "parameters": {},
  "data": {},
  "entities": [],
  "_meta": {"retrieved_at": "...", "sources": [], "cache": {}},
  "_links": {"self": "...", "source": "...", "wiki": "..."}
}
Form for manual use

The form is a fallback for people and browser agents that cannot open the GET URL directly.

Type: decimal number. Coordinate in decimal degrees. Must be inside a Norwegian municipality; other points raise an error.
Type: decimal number. Coordinate in decimal degrees. Must be inside a Norwegian municipality; other points raise an error.
Type: integer. Days ahead to include (0 to 7, default 2).

Result

Source: Weather and natural hazards. Retrieved 2026-08-02T21:58:13Z in 0.165 seconds.

municipality:
Holmestrand
municipality_number:
3903
warnings:

3 results

  1. level:
    1
    level_name:
    green
    danger_type:
    not reported by source
    valid_from:
    2026-08-02T07:00:00
    valid_to:
    2026-08-03T06:59:59
    main_text:
    Green level
    warning_text:
    not reported by source
    advice_text:
    not reported by source
    consequence_text:
    not reported by source
  2. level:
    1
    level_name:
    green
    danger_type:
    not reported by source
    valid_from:
    2026-08-03T07:00:00
    valid_to:
    2026-08-04T06:59:59
    main_text:
    Green level
    warning_text:
    not reported by source
    advice_text:
    not reported by source
    consequence_text:
    not reported by source
  3. level:
    1
    level_name:
    green
    danger_type:
    not reported by source
    valid_from:
    2026-08-04T07:00:00
    valid_to:
    2026-08-05T06:59:59
    main_text:
    Green level
    warning_text:
    not reported by source
    advice_text:
    not reported by source
    consequence_text:
    not reported by source
limit:
25
offset:
0
returned:
3
has_more_results:
no
truncated:
no
Will you use the result in generated code?

Open the same result as JSON

Continue exploring

How an AI agent should use this page

Ground rule: Navigate with HTML GET links to keep explanations and relationships. Use the page's JSON alternative only when concrete values must be extracted, compared or computed.

How to use the get_flood_warnings lookup

  1. Replace the placeholders in the HTML GET template; remove optional parameters you do not need.
  2. Check types, units, limits and ID formats in the parameter table.
  3. Follow linked results to canonical pages before combining sources.

Misreading to avoid: An empty list means "no results for this lookup". An error message or unavailable source does not mean the data does not exist.

Source-specific next step

Go to the source page for other operations. Use the JSON template only after the HTML result shows that the parameters and source are correct.