What is the Deception Index?

The Deception Index is a proprietary 0–10 score that measures how misleading current weather conditions are. A score of 0–2 means conditions feel exactly as they are — what you see is what you get. A score of 8–10 means the day is actively deceiving you: it may look mild or safe but is actually more dangerous than it appears. Inputs include the gap between actual and feels-like temperature, barometric pressure (below 1000 hPa signals instability), pressure trend, wind chill severity, and UV-to-cloud-cover mismatch. LOOK UP Sports shows this score with every weather read so athletes know when to be more cautious than the sky suggests.

What is wet bulb temperature and why does it matter for sports?

Wet bulb temperature (WBT) combines air temperature and humidity to measure how effectively the body can cool itself by sweating. Unlike heat index, wet bulb temperature accounts for evaporative cooling and is more directly tied to heat illness risk during exercise. Sports governing bodies use wet bulb globe temperature (WBGT) to set play/suspend thresholds: the ITF halts tennis at 38°C wet bulb, FIVB requires mandatory rest breaks in beach volleyball at 32°C, and USA Pickleball advises mandatory breaks at 32°C wet bulb. LOOK UP Sports calculates wet bulb temperature from live data and shows sport-specific heat alerts automatically.

Is it safe to play football in extreme heat?

Football heat safety is governed by the NFHS and NATA heat illness prevention guidelines. At a wet bulb globe temperature (WBGT) above 28°C (82°F), rest-to-activity ratios should be increased. Above 32°C WBGT, full-contact practice should stop. Above 35°C WBGT, all outdoor activity should be suspended. LOOK UP Sports calculates WBGT from live atmospheric data and shows a heat alert banner when conditions cross these thresholds, including a specific heat protocol recommendation for football players.

How does LOOK UP Sports work?

LOOK UP Sports uses your device's GPS to detect your location, then fetches live atmospheric data from Open-Meteo and the National Weather Service. That data — temperature, humidity, wind, UV index, barometric pressure, precipitation probability, and more — is sent to an AI model (Groq llama-3.3-70b) which generates a sport-specific weather interpretation. You select a sport persona (Football, Soccer, Golf, Tennis, Pickleball, etc.) and the AI tailors its read to what matters for that sport. Results include a headline, full atmospheric read, Deception Index score, sport-specific heat alert if applicable, and an AI-spoken audio summary.

What is the best weather app for golfers?

LOOK UP Sports includes a Golfer persona that interprets conditions specifically for golf: wind speed and direction relative to the course, optimal ball flight conditions, UV load and shade windows, lightning risk with USGA/PGA Tour protocols, and grip-moisture conditions. The AI reads barometric pressure trends to forecast afternoon instability and flags the Deception Index when a calm morning disguises incoming afternoon storms — a common hazard for golfers.

Can I play pickleball in 90-degree heat?

Whether 90°F (32°C) is safe for pickleball depends on humidity, not just temperature. USA Pickleball recommends mandatory rest and water breaks every 20 minutes when the wet bulb temperature exceeds 32°C. At wet bulb temperatures above 38°C, outdoor play should be suspended immediately. LOOK UP Sports calculates wet bulb temperature from live humidity and temperature data and automatically shows a pickleball heat alert if conditions cross these thresholds.

What wind speed is too windy for tennis?

Tennis becomes significantly affected by wind above 15 mph (24 km/h), where ball trajectory becomes unpredictable on serve and groundstrokes. Sustained winds above 25 mph (40 km/h) make play competitively unreliable. Wind gusts above 35 mph (56 km/h) are generally considered unsafe for outdoor tennis at any level. LOOK UP Sports' Tennis persona interprets wind conditions in terms of their impact on serve accuracy, ball movement, and match strategy.

How does weather affect baseball?

Weather affects baseball in several ways: high humidity increases ball drag and reduces home run distance; cold temperatures make the ball harder and reduce bat pop; wind direction relative to the outfield walls directly affects fly ball carry; barometric pressure at altitude (Denver vs sea level) significantly changes ball flight. LOOK UP Sports' Baseball persona reads atmospheric conditions in terms of how they affect pitching grip, bat-to-ball contact, outfield conditions, and infield surface playability.

Does LOOK UP Sports work without an account?

Yes. LOOK UP Sports requires no account, login, or personal information. Your GPS coordinates are used once per request to fetch weather data and are never stored. There are no cookies, no ads, and no tracking. The app is completely free and works instantly in any modern browser.

Which sports does LOOK UP Sports support?

LOOK UP Sports has 14 specialized sport personas: Football Player, Baseball Player, Soccer Player, Golfer, Racer (auto racing), Tennis Player, Track & Field Athlete, Beach Volleyball Player, Pickleball Player, Lacrosse Player, Softball Player, FlingGolfer, Kickballer, and Rodeo Cowboy. There is also an Everyone mode for general weather interpretation. Each persona applies sport-specific thresholds, governing-body protocols, and domain expertise to the AI weather read.

What is the heat alert feature in LOOK UP Sports?

Heat alerts in LOOK UP Sports are sport-specific warnings that appear when atmospheric conditions cross the thresholds set by each sport's governing body. For football, this uses NATA/NFHS WBGT guidelines. For tennis, the ITF Extreme Heat Rule. For beach volleyball, the FIVB heat protocol. For pickleball, USA Pickleball heat advisories. For soccer, track, and other sports, WBGT-based thresholds aligned with international sports medicine guidelines. The alert shows the condition level (warning or danger), the specific threshold crossed, and a recommended action — such as mandatory breaks, removing padding, or suspending play.

Is it safe to play soccer in the heat?

FIFA and international sports medicine guidelines recommend using wet bulb globe temperature (WBGT) to assess soccer heat safety. At 28–32°C WBGT, cooling breaks between halves are strongly recommended and substitutions should be increased. At 32–35°C WBGT, additional water breaks during play are required. Above 35°C WBGT, matches should be postponed or moved to cooler times of day. Heat risk compounds significantly in the second half as glycogen depletes and core temperature rises. LOOK UP Sports' Soccer persona calculates WBGT from live conditions and flags a heat alert when these thresholds are crossed, noting whether it's the first or second half risk window that's most dangerous.

How does weather affect auto racing and track conditions?

Weather has a direct impact on auto racing performance and safety. Track surface temperature affects tire compound selection — asphalt can reach 20–30°F hotter than ambient air, changing grip levels dramatically. High humidity reduces engine power output by reducing air density. Rain creates standing water risks and dramatically reduces braking performance. Wind speed above 40 mph can affect aerodynamic stability at high speeds on open circuits. Ambient air density altitude (affected by temperature, humidity, and barometric pressure) changes fuel mixture and horsepower. LOOK UP Sports' Racer persona interprets all of these atmospheric factors in terms of their direct effect on track conditions, tire strategy, and cockpit heat load.

What weather conditions are dangerous for track and field athletes?

Track and field athletes face heat illness risk at lower temperature thresholds than most sports because of sustained aerobic exertion. World Athletics (formerly IAAF) and sports medicine bodies recommend using WBGT: above 28°C WBGT, distance event performance declines significantly; above 32°C WBGT, events should be rescheduled or shortened. Wind is a significant factor for sprinters — a legal tailwind is capped at 2.0 m/s (4.5 mph) for record eligibility, and headwinds of 10+ mph measurably slow sprint times. For distance runners, dew point above 65°F (18°C) causes noticeable performance decline. LOOK UP Sports' Track & Field persona reads all of these factors and calculates the expected performance impact.

Is it safe to play beach volleyball in extreme heat?

The FIVB (beach volleyball's international governing body) uses wet bulb temperature as its primary heat safety metric. At 32°C wet bulb, mandatory hydration breaks and shade access between sets are required. At 38°C wet bulb, play should be suspended and the beach court cleared. Sand surface temperature is a compounding factor — dry sand in full sun can reach 130–160°F (54–71°C), creating foot burn risk even before heat illness becomes a concern. LOOK UP Sports' Beach Volleyball persona calculates wet bulb temperature from live humidity and temperature data and automatically shows a FIVB-aligned heat alert with the specific action required.

What weather conditions affect lacrosse players?

Lacrosse is a high-intensity full-pad sport played in a wide range of conditions. Heat illness risk is elevated because players wear shoulder pads and helmets that trap heat — effective WBGT for padded players is significantly higher than ambient conditions suggest. US Lacrosse follows NFHS heat guidelines: mandatory rest ratios begin at 28°C WBGT and play should stop above 32°C WBGT. Wet turf and natural grass create different footing conditions affecting cutting speed. Cold weather below 40°F (4°C) affects stick grip and glove dexterity. LOOK UP Sports' Lacrosse persona accounts for the pad-heat multiplier and field surface conditions in its weather read.

How does weather affect softball players and pitchers?

Weather significantly affects softball at multiple levels. High humidity increases ball drag slightly and makes grip management critical for pitchers — excessive sweat reduces spin rate on rise balls and drop balls. Cold temperatures below 50°F (10°C) harden the ball, reducing compression and making it play dead off the bat. Infield conditions matter: wet clay becomes slick and muddy while dry clay creates unpredictable bounces. Wind direction relative to the outfield fence changes fly ball carry meaningfully. ASA and NFHS apply standard WBGT heat guidelines: mandatory rest above 28°C, suspend above 32°C. LOOK UP Sports' Softball persona addresses all of these factors, including a pitcher-specific grip assessment based on humidity and temperature.

What weather conditions are best for Fling Golf?

FlingGolf uses a lacrosse-style stick instead of traditional clubs, making disc and ball flight physics different from conventional golf. Wind is the dominant variable — crosswinds above 15 mph significantly affect the parabolic arc of the flung ball, while headwinds reduce distance more sharply than in golf due to the lower launch angle. Temperature affects ball compression similarly to golf. Wet conditions make the grip and flinging motion less predictable. UV index matters for extended rounds played without shade. LOOK UP Sports' FlingGolfer persona reads wind speed and direction, UV index, humidity, and temperature in terms of their specific effect on the FlingGolf throw arc and course management strategy.

Does weather affect kickball games?

Weather affects kickball in several ways. Wet or muddy field conditions make the rubber ball unpredictable off the foot and reduce traction for base running. Wind direction affects long kicks similarly to soccer — a tailwind can carry a fly ball well beyond the outfield, while a stiff headwind cuts distance significantly. High heat and humidity affect player stamina in a sport typically played in recreational leagues without athletic training protocols, making heat awareness important for casual players. Cold temperatures below 45°F (7°C) make the rubber ball stiffer and harder to kick with precision. LOOK UP Sports' Kickball persona reads field conditions, wind, and heat in terms of their practical effect on game play.

How does weather affect rodeo events and cowboys?

Rodeo presents unique weather challenges because both riders and livestock are affected. High heat stress affects horse performance and cattle behavior significantly — livestock become more agitated and unpredictable in temperatures above 85°F (29°C) combined with high humidity. Arena surface conditions (wet vs. dry dirt) change how horses plant and turn, directly affecting barrel racing times and roping runs. Sun angle and glare affect a rider's visual tracking of cattle during roping and cutting events. Lightning protocols for outdoor arenas require clearing livestock and spectators — a complex operation that takes longer than clearing human athletes alone. LOOK UP Sports' Rodeo Cowboy persona reads heat stress for both rider and livestock, arena surface conditions, glare angle, and lightning risk.

What is WBGT and why does it matter for athletes?

WBGT (Wet Bulb Globe Temperature) combines air temperature, humidity, wind speed, and solar radiation into a single heat-stress index. It is the standard used by governing bodies including FIFA, ITF, NATA, and FIVB to determine when outdoor play or practice should be modified, suspended, or cancelled due to heat danger.

How do I use this WBGT calculator?

Enter the air temperature, relative humidity, and UV index for your location. The calculator instantly estimates WBGT using the Stull (2011) wet-bulb approximation and shows you the heat-safety threshold for your specific sport — color-coded green, yellow, orange, or red.

What WBGT level is dangerous for outdoor sports?

Most governing bodies trigger mandatory rest breaks above 28°C WBGT (82°F). Above 32°C WBGT (90°F) most sports should be suspended entirely. Your sport's specific thresholds are displayed automatically after you run the calculation.

How accurate is a calculated WBGT compared to a physical sensor?

This calculator uses the Stull (2011) wet-bulb approximation and estimates globe temperature from UV index. Results are accurate within approximately 1–2°C of a physical Black Globe sensor for typical outdoor conditions. For official competitions, always verify with a certified WBGT meter on-site.

Free WBGT Calculator — Wet Bulb Globe Temperature for Athletes

LOOK UP Sports is a free AI weather app that interprets conditions for your specific sport. Select from 14 sport personas including football, baseball, soccer, golf, tennis, pickleball, lacrosse, softball, beach volleyball, track and field, auto racing, fling golf, kickball, and rodeo. The Deception Index score tells you when conditions are more dangerous than they look. Heat alerts warn you when wet bulb temperature crosses governing-body thresholds for your sport.