The standard rule for suspending play at the first sign of lightning is the 30-30 rule: count the seconds between the flash and the thunder, and if that gap is 30 seconds or less, get everyone off the field now. It's simple enough to teach a whole coaching staff in one sentence, and that simplicity is the point — lightning decisions happen fast, and a rule that requires judgment calls under pressure gets skipped.
What trips people up isn't the stop-play call, it's the details: how long to actually wait, who's allowed to make the call, whether the turf itself changes the risk, and where people are supposed to go if there's no building nearby. Here's the practical version.
Sound travels roughly one mile every five seconds, so counting the seconds between a lightning flash and the thunder that follows gives a rough distance to the strike. A 30-second gap corresponds to roughly six miles — close enough that the storm's leading edge, where lightning often strikes first, is already in range.
No — this is one of the more persistent myths among facility managers and parents. Turf fiber and infill (whether crumb rubber, sand, or organic material) aren't meaningful electrical conductors, and there's no data showing synthetic surfaces draw strikes more than natural grass. The actual risk factors are identical on turf and grass fields: metal goal frames, chain-link perimeter fencing, aluminum bleachers, light poles, and simply being the tallest object in an open, exposed area. A player standing near a goalpost on turf is at the same elevated risk as one standing near a goalpost on grass — the surface underfoot isn't the variable that matters.
Under most youth, scholastic, and recreational league rules, the referee or head official has unilateral authority to suspend play for weather, and that call shouldn't require agreement from coaches, spectators, or league administrators in the moment — seconds matter. For tournaments, camps, or facility-run events without a single head official across every field, that authority needs to be assigned to a specific person (often the tournament director or facility operator) and communicated to all officials and coaches before the event starts, not improvised when the sky turns dark. Our tournament setup service includes coordinating this kind of pre-event logistics, and our referee staffing officials are trained to make the stop-play call independently.
| Location | Safe? | Why |
|---|---|---|
| Fully enclosed building with wiring/plumbing | Yes | Provides a grounding path that redirects a strike away from occupants |
| Hard-topped vehicle, windows up | Yes (second choice) | The metal shell conducts a strike around the occupants to the ground |
| Open-sided pavilion or dugout | No | No grounding path; offers no real protection from a direct or nearby strike |
| Under a tree | No | Tall, isolated trees are common strike points, with risk of side flash to anyone nearby |
| Metal shed or storage structure | No | Metal walls without proper grounding can conduct a strike directly to occupants |
DreamFields builds weather contingency planning — including designated shelter locations and stop-play authority — into every tournament setup package we run across the Tri-State Area.
Get a QuoteOnce the 30-minute clock clears, don't assume the field is automatically ready. Standing water on turf can hide slick, compacted spots or drainage failures; downed branches and debris need clearing before players return; and fencing or goal anchors that took wind stress during the storm should get a quick visual check. A fast walk-through of the field and its equipment before whistling players back on is worth the extra five minutes. Our storm cleanup service handles debris and drainage recovery after severe weather, and our field inspection service covers a full post-storm safety check for schools and municipalities that need it documented.
Count the seconds between a lightning flash and the thunder. If the gap is 30 seconds or less, stop play immediately. Don't resume until 30 minutes have passed since the last flash or thunder.
A minimum of 30 minutes from the most recent flash or thunder — not from when the storm appears to pass. Any new strike during the wait resets the 30-minute clock.
No. Turf fiber and infill aren't significant conductors. The real risk factors — metal goals, fencing, bleachers, light poles — are the same on turf and grass fields.
Usually the referee or head official under league rules. For tournaments without a single official across all fields, the facility operator or tournament director should be designated in writing before the event.
A fully enclosed, hard-topped vehicle with windows up. Dugouts, open pavilions, sheds, and trees are not safe shelter despite being common instincts.
See also: Field Inspection Services · Referee & Umpire Staffing · Tournament & Event Setup · Storm Cleanup Services