Football Weather Indices — Snow Bowl, Swamp Monster & More

The Weather Football Index says how much weather matters. These say in what way — each a 0–100 score computed from the same live inputs, so they render on any weather map and feed downstream data. Drag the dials, or hit a preset.

Temperature

Wind (sustained)

Gust

Humidity

Rain rate

Snow rate

The Family

v0.1 · map-ready

0–100 · wind-first

🥅 Field Goal Shank

How likely a kick sails wide. Driven by wind & gust, then cold (range) and a wet ball. High = book the miss.

0–100 · playcalling

🏈 Don't Throw It / Run It

How hard the conditions push a team to the ground. Wind and precipitation dominate; the label runs "Air it out" → "Ground & pound."

0–100 · lights up in snow

❄️ Snow Bowl

A genuine snow game — snowfall rate × cold × wind. Zero unless it's actually snowing, so it flags the real thing on a map.

0–100 · hot & humid

🐊 Swamp Monster

Wet, humid, hot misery — heat index × mugginess × tropical rain. The September-in-Miami index; zero below 78°F.

Umbrella: Weather Football Impacts returns all four plus the dominant regime (Snow Bowl · Swamp Monster · Windswept · Deep Freeze · Flurries · Slop · Muggy · Breezy · Fair) — the label & color a map cell gets. Definitions in data/indices.py & assets/indices.js (identical math), ready for weather.city grids.

Index Leaderboards

all-time

Each index is a mini-tool. Pick one to see the games in our record that most set it off — the roughest kicking days, the true snow games, the swampiest afternoons.

🎯 Field Goal Shank — Wind and cold that bend field goals — the games where kickers had no chance.

#	Matchup	Season	Air	Wind	WFI	shank risk
1	NO @ CLE FirstEnergy Stadium	2022 w16	6.0°	27.0 mph	85	75
2	HOU @ CHI Soldier Field	2004 w15	12°	21 mph	68	74
3	LV @ PIT Acrisure Stadium	2022 w16	9.0°	21.0 mph	68	74
4	GB @ CHI Soldier Field	2007 w16	16.0°	22.0 mph	85	72
5	PIT @ CLE Cleveland Browns Stadium	2009 w14	15.0°	25.0 mph	70	72
6	JAX @ CIN Paul Brown Stadium	2000 w16	9°	20 mph	66	71
7	ATL @ PHI Lincoln Financial Field	2004 w20	17°	26 mph	70	71
8	MIA @ KC Arrowhead Stadium	2008 w16	10.0°	20.0 mph	66	71
9	BUF @ CIN Paul Brown Stadium	2004 w15	19°	22 mph	67	70
10	SD @ CLE Cleveland Browns Stadium	2004 w15	18°	30 mph	85	70
11	CIN @ CLE Cleveland Browns Stadium	2008 w16	18.0°	26.0 mph	70	70
12	TEN @ CLE Cleveland Browns Stadium	2000 w16	20°	35 mph	85	69
13	PIT @ CLE FirstEnergy Stadium	2013 w12	20.0°	31.0 mph	80	69
14	JAX @ CLE Cleveland Browns Stadium	2009 w17	16.0°	20.0 mph	64	68
15	DEN @ NE Gillette Stadium	2013 w12	22.0°	22.0 mph	62	68

On the Weather Map

regime choropleth mock

This is how the family renders downstream: color every grid cell by its dominant regime. A schematic CONUS mock (synthetic weather) with the NFL stadiums overlaid — swap the scenario to watch the map flip.