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Project analysis

Construction projects involve expensive equipment and significant manpower. Unfortunately, there are times when the weather experienced on site delays project completion. The longer a job takes, the higher the costs and the greater the potential for litigation.

We offer a range of trusted reports to help you resolve contractual disputes.

We have combined the historic gridded database of long term average values with a database of present observations used to drive the supercomputer forecasting models, to create our Location-based reports. Our system has been rigorously tested to ensure robustness and accuracy. Read our in depth technical report on how the testing was conducted.

For more information about our range of products for the construction industry, call our 24-hour customer centre 0370 900 0100 or email

Monthly downtime summaries

Monthly downtime summary reports provide you with detailed weather conditions experienced at your months of interest. These conditions can be compared to their corresponding long-term averages and 1-in-10 year values identifying weather conditions that fall outside of normal parameters which could not have been planned for.

Our downtime summary reports are suitable for guiding NEC and JCT contracts.
When you are looking to make a downtime claim, we produce reports suitable for NEC and JCT contracts, including NEC clause 60.1 (13).  'With solid statistical evidence derived from Met Office observations both parties can agree on whether a particular month contains a compensation event' (NEC). Learn more about NEC3 & NEC4.

Location based monthly downtime summaries:

  • Now uses weather data from more than 3,600 locations across the UK
  • Accurately reflects onsite weather conditions
  • Up to 16 weather parameters with wind as standard
  • 11 weather parameters with LTAs and 1-in-10 year values
  • Suitable for a variety of building contracts including NEC 60.1 (13) and JCT
  • Clear, easy to use format
  • Volume discounts available

Station based monthly downtime summaries:

  • Uses weather data from 100 weather stations across the UK
  • 3 different reports available:
    • Station based monthly downtime summary
    • Station based monthly downtime summary (incl. wind)
    • Station based monthly downtime summary (daytime)


See also Station based monthly downtime summary with daytime hours here

Bulk buy offers - Save up to 85%:  Subscribing to multiple reports, ideal for group purchasing and receive a substantial savings on the per report price of up to 85% with priced ranging from £21-£49 with 3 month to 12 month subscriptions available.

Historical National Severe Weather Warnings

We archive all of our issued National Severe Weather Warnings, which could be useful to corroborate project decisions. These contain:

  • The warning map and matrix
  • The Chief Forecaster's assessment
  • Dates of validity
  • Weather warning details
Yellow Amber Red

Please note that these alerts are general, and normally county based. They would not prove or disprove any specific weather activity a specific location. For more specific analysis you should consider our Downtime Summary Reports (above) and ClaimCheck Reports.

If you rely on National Severe Weather Warnings for business activity, it may be worth considering our range of Forecast Services which provide location-specific and timely alerting to the weather thresholds that affects you on-site activity.

To request a historical National National Severe Weather Warning alert please contact  

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