Drought single-period rolling minimum calculator

Calculate minimum rolling mean and first minimum window start with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use minimum rolling mean and first minimum window start to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Consecutive daily flows (m³/s)
5,4,3,2,1,2,3,4,2,1
Rolling averaging window (days)
3
Minimum rolling mean (m³/s)
1.666667
First minimum window start (1-based day)
4
Rolling mean series (JSON)
[4,3,2,1.66666666667,2,3,3,2.33333333333]

Try another scenario

Consecutive daily flows (m³/s)
[6, 4, 3, 2, 1, 2, 3, 4, 2, 1]
Rolling averaging window (days)
3
Minimum rolling mean (m³/s)
1.666667
First minimum window start (1-based day)
4
Rolling mean series (JSON)
[4.33333333333,3,2,1.66666666667,2,3,3,2.33333333333]
Calculation method

Calculation method

Minimum rolling mean (m³/s)

Complete consecutive-day rolling means over one supplied analysis period; gaps and cross-year grouping are not inferred.

First minimum window start (1-based day)

Complete consecutive-day rolling means over one supplied analysis period; gaps and cross-year grouping are not inferred.

Rolling mean series (JSON)

Complete consecutive-day rolling means over one supplied analysis period; gaps and cross-year grouping are not inferred.

Symbols and units
a
Consecutive daily flows (m³/s)
b
Rolling averaging window (days)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • User-supplied measurements and assumptions; Complete consecutive-day rolling means over one supplied analysis period; gaps and cross-year grouping are not inferred. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.