Wind blowing out: MLB today

What the research says

• MLB Wind Direction and Scoring Study

  Six seasons of outdoor games matched to game-window wind and each park's own field bearing — what wind blowing out, in and across is actually worth in runs and home runs.

• Wind Blowing Out vs the Betting Line

  Wind out is no Over signal — the closing total already accounts for it: 597 Overs, 612 Unders at 10+ mph.

• MLB Ballpark Wind Sensitivity Study

  Park by park: at Wrigley Field wind out vs in is worth about four runs; at most parks it is a run or less.

• Windiest MLB stadiums, ranked

  Which parks get the most wind, and which ones it actually changes scoring at.

• Wrigley wind history

  Which wind blows out at Wrigley Field and what it has been worth, by direction, speed and month.

• MLB Temperature and Scoring Study

  How cold and heat move run scoring and home runs, season-adjusted across every outdoor park.

• Coors Field humidor and altitude effect

  The one scoring factor that is not weather: 471 Coors games averaged 2.43 more runs than other parks, but only 0.25 more home runs — and the closing total already prices it in.

• MLB retractable roofs: rules and scoring impact

  Who decides if the roof opens, when it can close mid-game, and why open vs closed makes no measurable difference to scoring.

• All weather research

  Every published study, with sample sizes, t-statistics and the corrections log.

Common questions

Which MLB parks have the wind blowing out today?

This page lists every ballpark on today's slate grouped by the game-time wind, measured against each park's own centre-field bearing. Parks in the 'wind blowing out' group have at least 4 mph of wind carrying out toward centre field at first pitch.

How much does wind blowing out increase home runs?

Published batted-ball research puts a steady wind blowing out at roughly 3 to 5 feet of extra carry per mph on a well-struck fly ball, which turns a small number of warning-track outs into home runs. Our own MLB Wind Direction and Scoring Study, which matched six seasons of outdoor games to game-window wind against each park's field bearing, found the same direction-dependent pattern in actual run and home-run totals. The effect is largest in parks with short power alleys and negligible below about 5 mph.

What wind speed actually matters at a ballpark?

Below about 5 mph out to centre the effect is inside the noise. Around 10 mph it is measurable, and 15 mph or more out to centre is the level at which run environments shift noticeably. Direction matters more than raw speed: 15 mph across the field is not the same as 15 mph out.

Are domed and closed-roof parks included?

Yes, but listed separately. When the roof is shut the outside wind does not reach the field, so those games are shown as weather-neutral rather than being dropped from the slate.