Lightning Delay Rules for Football, Golf and Youth Sports

At least 30 minutes after the last thunder heard or lightning seen — that is the wait every US body below agrees on, and each new flash or rumble restarts the count from zero. The count runs from the storm's last audible or visible moment, which is why a delay announced as half an hour often runs to two.

What is far less uniform is the other half of the rule: the threshold that starts the delay. There is no single national mileage number, and the table below shows why — one body sets none at all, another names 10 miles only as a cross-check on hearing thunder.

The 30 minutes exists for a physical reason, and the NCAA handbook states it plainly: "Electrical charges can linger in clouds after a thunderstorm has seemingly passed." A storm that looks finished can still put a flash several miles out from its trailing edge.

The restart rule is the part crowds get wrong. One more distant rumble at minute 28 does not shave two minutes off the wait — it starts a fresh 30. This is the same arithmetic as the personal 30-30 rule that the National Weather Service teaches for anyone outdoors; organized sports simply put a named official in charge of the stopwatch.

For US high school football, the NFHS publishes what it calls "a default policy" — its own word — and points schools at their state high school activities association and the nearest National Weather Service office for the policy that actually binds them. So there is no single national high-school lightning rule, and a Friday-night delay in one state can follow a different trigger than the one next door.

The NFHS default is straightforward: suspend on the first thunder or flash, wait 30 minutes, reset on anything new. It permits an independently validated detection device or phone app to suspend play when a strike is within 10 miles, with a caveat worth quoting — "you should never depend on the reliability of these devices," and hearing thunder or seeing lightning "should always take precedence."

The NCAA's current Sports Medicine Handbook (Guideline 2B) is notably quieter on numbers. It publishes no mileage trigger at all. Instead it tells schools that a lightning threat generally extends six to 10 miles from the storm base and that when to clear "depends on how long it will take for all individuals to evacuate the premises (including spectators)" — a stadium of 60,000 needs its call made earlier than a practice field of 40.

On authority, both the NWS and the NCAA are blunt: the watcher has to be someone with no game to run. The designated weather watcher "should not be a coach, umpire or referee, as they cannot adequately monitor the weather conditions given their other responsibilities," and the chain of command must include personnel with "unchallengeable authority to suspend activity."

Golf is the exception in this list. Lightning appears in the Rules of Golf themselves, carrying the same weight as any other playing rule. Under Rule 5.7a, a player may stop play when they believe there is danger from lightning, and must then report to the Committee — one of the few moments in the Rules where a player may walk off on their own judgment.

Rule 5.7b covers the other direction. When the Committee declares an immediate suspension for imminent danger, "you must not make another stroke until the Committee resumes play" — no finishing the hole, no finishing the shot. That is the difference between the immediate suspension used for lightning and an ordinary suspension for darkness, where a group already on a hole may choose to play it out.

What the Rules do not do is name a distance or a wait. Resumption is the Committee's call, informed by whatever monitoring the course has. In practice that is why two events in the same storm can restart 40 minutes apart.

Most lightning delays never reach a scoreboard. They happen at a practice, a middle-school game, a rec-league field with no PA system — and the adult who has to decide is often the only adult there. The NWS guidance is written for exactly this: have a plan, name the monitor in advance, and stop without waiting to feel foolish about it.

Two details from that guidance are worth committing to memory. Shelter means "substantial buildings with wiring and plumbing" or a hard-topped metal vehicle with the windows closed. Dugouts, rain shelters and equipment sheds are called out by name as NOT SAFE, capitals theirs. And there is no safe outdoor place while a thunderstorm is in the area.

For the parent stuck at work while practice runs across town, the useful thing is knowing a storm is closing on that field before the group text starts. StrikeCast will alert you when lightning is detected near a place you have saved — the field, the school, home — with the distance to the nearest strike and whether it is approaching or moving away. It does not make the call for the coach. It means the people away from the field learn about the storm when the people at the field do.

It depends which of four different things you are asking about, and most arguments on a sideline are really two people answering different questions.

The honest answer for a 15-mile alert: treat it as a heads-up to start watching. Under every body above, hearing thunder is enough on its own — and thunder generally carries about 10 miles, so if you can hear it, you are already inside the range that stops play.

To judge it without any app, count the seconds between the flash and the thunder and divide by five for the distance in miles.

A Friday-night game, kickoff 7:00 pm. How the delay actually runs:

Total elapsed: 79 minutes, from a delay that was announced as 30. This is why an athletic director's storm plan has to include the point at which the game gets called off — and it is why the trend matters as much as the distance. A storm moving away lets the clock run clean; one sitting over the county keeps restarting it.

The NFHS calls its document a default, and states take it from there. Kansas, for example, publishes its own guideline for member schools that uses a 30-second flash-to-bang count as the removal criterion — a stricter, more conservative trigger than "first thunder," and one that no national body in the table above states.

Practically, that means the number that governs your Saturday morning is whichever is strictest of: your state association's policy, your league's, and the venue's own emergency action plan. When they conflict, the strictest one wins. If you administer a venue, the NWS and NCAA both recommend writing the plan down, naming the monitor before the season, and reviewing it annually with everyone who might have to run it.

Safety note: lightning detection — satellite, ground network or app — has latency and location uncertainty, and reports strikes that have already happened. It does not forecast. The governing body of the event and its emergency action plan control the decision, and nothing here replaces an official National Weather Service warning.