Fireworks and drone light show companies: the wind call, at your height

As a show producer, lead pyrotechnician, or chief drone pilot, you frequently face the critical decision to launch, hold, or cancel a display. This decision is made for each show and often hourly on the evening of the event, especially when managing drone swarms with tight wind limits. A wrong call can have significant consequences, including client refunds, wasted crew time for a cancelled show, or, more critically, the loss of drones over spectators.

Your responsibility is to assess the wind conditions at the working height of 120 metres, considering both the mean wind speed and gusts. This assessment informs your decision, which must align with manufacturer limits and your show's risk assessment. The cost of a wrong call extends beyond immediate financial losses, affecting your reputation and future opportunities.

Having clear, precise wind data for the specific height of your display helps you make informed decisions. This is not about simply knowing the wind at ground level, but understanding its behaviour at the altitude where your equipment will encounter. The ability to make the correct call, even under pressure, is central to successful event delivery and managing risk.

Your drone light shows and pyrotechnic displays typically operate at heights up to 120 metres. Wind conditions at this altitude can differ significantly from those measured at ground level. The instrument provides wind data specifically at 10, 80, 120, and 180 metres, and interpolates to your exact working height, giving you a precise understanding of the environment your equipment will encounter.

For your work, it is important to consider both the mean wind speed and the gusts at the show height. Your operational limits, set by the drone manufacturer or your own risk assessment, will specify thresholds for both. For example, a commonly cited limit for drone shows is 7 metres per second at 120 metres. The instrument displays gusts alongside the mean wind, allowing you to compare both directly against your specified limits.

Understanding the wind profile from the ground up to your operating height helps you anticipate changes and potential issues. This specific data ensures you are making decisions based on the actual conditions where your display will perform, not just a general forecast for the area.

The instrument provides P(above your limit) by the hour, which is the fraction of ensemble members that predict wind speeds exceeding your set limit at your working height. This gives you a clear hourly indication of the probability that conditions will be unsuitable for your display. For example, if your limit is 7 m/s at 120 m, this feature shows the chance of that threshold being exceeded.

This is not a measure of model disagreement. Instead, the Agreement Spine feature shows where the various weather models agree or disagree on the forecast. This distinction is important: P(above your limit) quantifies risk, while the Agreement Spine indicates forecast certainty. When 20 per cent of ensemble members show winds above your limit, you might begin to prepare contingency plans. At 50 per cent, you would likely be in active discussions with clients about potential delays or cancellations.

If 80 per cent or more of the ensemble members indicate winds above your limit, you would typically make the call to cancel or postpone the display. This probabilistic approach helps you manage client expectations and operational planning by providing a quantified risk assessment for each hour of your event.

Imagine it is 20:00 on the evening of your show, and you are preparing for a 22:00 launch. Your limit is 7 m/s at 120 m for drone operations.

• 20:00: The instrument shows a mean wind of 5 m/s with gusts to 6.5 m/s at 120 m, well within your limits. P(above your limit) is 10% for 22:00.
• 20:30: The forecast updates. Mean wind is now 6 m/s, gusts to 7.5 m/s. P(above your limit) for 22:00 rises to 30%. You start to monitor conditions more closely and brief your team.
• 21:00: Mean wind at 120 m is 6.8 m/s, gusts to 8.2 m/s. P(above your limit) for 22:00 is now 60%. You inform the client of a potential delay or cancellation due to increasing wind risk.
• 21:30: The forecast holds. Mean wind is 7.2 m/s, gusts to 8.8 m/s. P(above your limit) is 85%. You make the decision to hold the launch and reschedule, documenting the conditions and your call.
• 22:00: The instrument records observed wind at 120 m as 7.5 m/s with gusts to 9.0 m/s. Your decision to hold was justified by the conditions.

Your operational limit for wind speed is a critical parameter, typically derived from your drone manufacturer's specifications or your company's risk assessment document. For drone shows, a common limit is 7 metres per second at 120 metres. You input this specific limit directly into the instrument. The instrument's preset for drone operations is 120 metres height, with a limit of 15.7 miles per hour (7 m/s) for mean and gust at show height.

This limit is not set by the instrument itself, but by your own documents and operational guidelines. The instrument then uses this value to compute probabilities and display relevant data, ensuring that all forecasts and observations are presented in the context of your specific operational thresholds. This allows you to quickly assess whether conditions are within acceptable parameters for your display.

It is important to review and confirm your limits periodically, especially as new equipment or operational procedures are introduced. The instrument serves as a tool to help you adhere to these self-imposed or manufacturer-imposed limits, providing the data needed for informed decision-making.

Maintaining a dated record of wind conditions, forecasts, and your decisions is essential for show producers, lead pyrotechnicians, and chief drone pilots. Should an incident occur, such as drone loss over spectators, or a client dispute over a cancelled show, this record serves as proof that you exercised due diligence in assessing weather risks.

The instrument provides a dated record page that logs what was forecast, what was observed, the wind limit you used, and the call you made. This 'frozen record' is invaluable for post-event analysis, insurance claims, or regulatory inquiries. For example, after a cancelled show, this record can be presented to the client to transparently demonstrate the meteorological basis for your decision.

In the event of an incident, authorities or insurers will often ask for documentation of your pre-launch checks. A clear, time-stamped record from the instrument provides objective evidence of your decision-making process, demonstrating that you actively monitored conditions against your established limits, protecting your operation and providing accountability.

Ireland's location on the Atlantic seaboard means that wind conditions can be highly dynamic, particularly during the storm season from October to March. This seasonality significantly impacts the planning and execution of outdoor events, including drone and fireworks displays, which are popular during summer, Halloween, and New Year. The prevailing westerly winds can bring rapid changes, making accurate forecasting at specific heights even more critical for your operations.

Irish Halloween and New Year displays typically operate under council event licences, which often include specific requirements regarding public order and operational limits. Met Éireann, as the national forecaster, provides general meteorological information, but your need is for precise wind data at your specific operating height, not just regional forecasts. Relying solely on ground-level observations can lead to misjudgements when operating at 120 metres.

The variability of Irish weather, with its potential for strong winds and sudden gusts, makes accurate, height-specific wind forecasting crucial. Being able to monitor conditions at 120 metres, rather than relying on ground-level observations, is particularly important for managing the risks associated with drone swarms in this environment. This precise data allows you to make informed decisions that consider the unique challenges of the Irish climate.