Global Spot Weather Forecast Percentiles from Met Office IMPROVER System

Percentile weather forecasts for 5,956 global sites produced by the Met Office IMPROVER Blended Probabilistic Forecast system. The data is derived from operational Numerical Weather Prediction ensembles and nowcasts, which are blended, calibrated, and verified. This is one of eight Blended Probabilistic Forecast products published by the Met Office on AWS.

Use Cases

• Analyze the range of possible weather outcomes at specific global sites based on ensemble percentiles.
• Compare high and low percentile forecasts for temperature to assess forecast confidence.
• Investigate precipitation extremes with caution, as the description notes high percentiles may overestimate spatial extent.

Strengths

• Covers 5,956 specific sites globally, providing location-specific forecasts.
• Forecasts are produced by a calibrated and verified operational pipeline (IMPROVER).
• Data is part of a suite of eight related probabilistic products for different domains and representations.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description warns precipitation percentiles are hard to interpret and may not be spatially realistic.

Provenance

Source

Met Office

Collection Method

Derived from operational NWP ensembles and nowcasts, blended and calibrated using the IMPROVER pipeline.

Time Range

null

Freshness

Information is correct as of April 2026, but parameters may change.

Geography

Global