- Track temp
- 53°F11°C
- Rain chance
- 0%
- Wind
- 4mph7km/hNW
- Density alt.
- -354ft-108m
- Barometer 30.41 inHg1030 hPa steady
- Humidity 49%
- Cloud 21%
- UV 0
Forecast updated · Open-Meteo
Hour by hour
Mostly clearTemperature 53°11°Rain chance 0%Wind 4 mph7 km/hNWTrack temperature 53°11°Mostly clearTemperature 51°10°Rain chance 0%Wind 3 mph5 km/hNWTrack temperature 51°10°
Partly cloudyTemperature 49°9°Rain chance 0%Wind 3 mph4 km/hSWTrack temperature 49°9°
OvercastTemperature 49°9°Rain chance 0%Wind 4 mph6 km/hSWTrack temperature 49°9°OvercastTemperature 48°9°Rain chance 0%Wind 1 mph2 km/hWTrack temperature 48°9°OvercastTemperature 45°7°Rain chance 0%Wind 2 mph3 km/hNTrack temperature 45°7°OvercastTemperature 45°7°Rain chance 0%Wind 1 mph2 km/hSWTrack temperature 45°7°OvercastTemperature 44°7°Rain chance 0%Wind 1 mph2 km/hSETrack temperature 44°7°OvercastTemperature 43°6°Rain chance 0%Wind 1 mph1 km/hSSETrack temperature 43°6°OvercastTemperature 43°6°Rain chance 0%Wind 1 mph2 km/hSSETrack temperature 43°6°OvercastTemperature 42°6°Rain chance 0%Wind 1 mph1 km/hSSWTrack temperature 42°6°OvercastTemperature 42°5°Rain chance 0%Wind 0 mph1 km/hSSWTrack temperature 42°5°OvercastTemperature 41°5°Rain chance 1%Wind 1 mph2 km/hESETrack temperature 41°5°
OvercastTemperature 41°5°Rain chance 1%Wind 2 mph3 km/hETrack temperature 41°5°OvercastTemperature 43°6°Rain chance 1%Wind 2 mph4 km/hETrack temperature 47°8°OvercastTemperature 48°9°Rain chance 1%Wind 2 mph3 km/hETrack temperature 58°14°OvercastTemperature 54°12°Rain chance 1%Wind 5 mph8 km/hSSETrack temperature 68°20°OvercastTemperature 56°14°Rain chance 1%Wind 6 mph9 km/hSTrack temperature 75°24°OvercastTemperature 59°15°Rain chance 1%Wind 6 mph10 km/hSTrack temperature 78°25°OvercastTemperature 60°16°Rain chance 1%Wind 6 mph9 km/hSTrack temperature 79°26°OvercastTemperature 61°16°Rain chance 1%Wind 6 mph10 km/hSTrack temperature 77°25°OvercastTemperature 61°16°Rain chance 1%Wind 6 mph10 km/hSTrack temperature 71°22°OvercastTemperature 60°16°Rain chance 1%Wind 6 mph9 km/hSTrack temperature 66°19°OvercastTemperature 55°13°Rain chance 1%Wind 5 mph8 km/hSSETrack temperature 55°13°Hours in your time zone (the track's when they match). Track temperature is an estimate.
The racer numbers
Computed from the forecast air temperature, dew point and station pressure (NWS formulas). Track temperature is estimated from sun, wind and the surface; it is not a sensor reading. How these are figured.
Day by day
- TodayOct 3160°16° 40°4° 0%Green flag
- TomorrowNov 161°16° 41°5° 1%Green flag
- MonNov 265°18° 41°5° 2%Green flag
- TueNov 361°16° 45°7° 1%Green flag
- WedNov 471°22° 49°9° 9%Yellow flag
- ThuNov 571°22° 54°12° 45%Green flag
- FriNov 6
70°21° 62°16° 49%Red flagpartial
| Day | Flag | Sky | High / low | Rain | Gusts | Track temp | Density alt. | Sunrise · sunset |
|---|---|---|---|---|---|---|---|---|
| Today Oct 31 | Green flag | Overcast | 60°16° 40°4° | 0% | 12 mph19 km/h WNW | 78°26° | 134 ft41 m | 7:35 AM · 6:08 PM |
| Tomorrow Nov 1 | Green flag | Overcast | 61°16° 41°5° | 1% | 9 mph15 km/h S | 79°26° | 134 ft41 m | 6:36 AM · 5:07 PM |
| Mon Nov 2 | Green flag | Overcast | 65°18° 41°5° | 2% | 15 mph24 km/h S | 81°27° | 541 ft165 m | 6:37 AM · 5:05 PM |
| Tue Nov 3 | Green flag | Overcast | 61°16° 45°7° | 1% | 12 mph19 km/h S | 70°21° | 515 ft157 m | 6:38 AM · 5:04 PM |
| Wed Nov 4 | Yellow flaggusty wind | Overcast | 71°22° 49°9° | 9% | 27 mph44 km/h S | 85°29° | 1,309 ft399 m | 6:39 AM · 5:03 PM |
| Thu Nov 5 | Green flag | Overcast | 71°22° 54°12° | 45% 0.04 in0.9 mm | 23 mph38 km/h SSE | 82°28° | 1,516 ft462 m | 6:41 AM · 5:02 PM |
| Fri Nov 6 | Red flagrain | Drizzle | 70°21° 62°16° | 49% 0.67 in17 mm | 15 mph24 km/h SSE | 77°25° | 1,600 ft488 m | 6:42 AM · 5:01 PM |
Flags judge the racing hours, 9 am to 10 pm at the track. Days marked partial are at the edge of the forecast.
Every hour, every number
Today’s remaining 5 hours are free. Pro members get all seven days and the CSV.
| Hour | Air | Dew pt | Humidity | Barometer | Density alt. | Air density kg/m³ | Grains | Track temp (est.) | Wind | Rain |
|---|---|---|---|---|---|---|---|---|---|---|
| 53°11° | 34°1° | 49% | 30.41 inHg1030 hPa | -354 ft-108 m | 1.238 | 29 | 53°11° | 4 mph7 km/h NW | 0% | |
| 51°10° | 34°1° | 53% | 30.45 inHg1031 hPa | -527 ft-161 m | 1.244 | 29 | 51°10° | 3 mph5 km/h NW | 0% | |
| 49°9° | 34°1° | 56% | 30.46 inHg1032 hPa | -647 ft-197 m | 1.248 | 29 | 49°9° | 3 mph4 km/h SW | 0% | |
| 49°9° | 33°1° | 54% | 30.48 inHg1032 hPa | -668 ft-204 m | 1.249 | 27 | 49°9° | 4 mph6 km/h SW | 0% | |
| 48°9° | 32°0° | 54% | 30.49 inHg1033 hPa | -744 ft-227 m | 1.252 | 27 | 48°9° | 1 mph2 km/h W | 0% |
Every hour from the forecast, the same arithmetic as the pit box above (NWS density-altitude formula; track temperature is an estimate). Hours in your time zone, the track’s when they match.
Plan the whole week at Williams Grove
Pit box, all week
Every forecast hour for the next seven days at Williams Grove: density altitude, air density, grains, track temp and more, with a CSV for the tuning laptop.
Do the models agree?
ECMWF, GFS and ICON side by side for the next three racing days, so you know when the forecast is shaky.
Next 6 hours of rain
Rain in 15-minute steps for the next six hours at your tracks, refreshed every hour.
Alerts for your tracks
An email the morning a red or yellow flag is due at Williams Grove, and a heads-up three days out.
Getting to Williams Grove
1 Speedway Drive, Mechanicsburg, PA 17055
Parking
Free for ticket holders, in lots on the backstretch (turns 2 and 3) and front stretch (turns 1 and 4). Accessible parking on the front stretch and limited spots on Beer Hill. williamsgrove.com
Camping On site
Dry camping only for tents and campers, off Williams Grove Road and on Beer Hill (turn 3), from noon on race day. World of Outlaws shows: reserve by phone from February; opens 9 a.m. the day before. williamsgrove.com
Good to know
Cash only; ATM by the speedway office. Coolers up to 18 inches. Fans 21 and over may bring alcohol (none sold), no glass. williamsgrove.com
From the track’s own pages, checked October 2026. Prices and rules change by event, so confirm before you go.
Facts
- Location
- Mechanicsburg, Pennsylvania
- Layout
- Half-mile dirt oval
- Length
- 0.5 mi (0.80 km)
- Surface
- Dirt
- Banking
- semi-banked
- Opened
- 1939
- Series
- World of Outlaws, 410 Sprints
- Signature events
- National Open
- Time zone
- America/New York
- Elevation
- 440 ft (134 m)