NowOvercastTemperature 64°18°Rain chance 27%Wind 11 mph18 km/hSTrack temperature 72°22°
OvercastTemperature 62°17°Rain chance 17%Wind 8 mph13 km/hSSETrack temperature 66°19°
OvercastTemperature 62°17°Rain chance 12%Wind 6 mph10 km/hSETrack temperature 64°18°
OvercastTemperature 61°16°Rain chance 8%Wind 4 mph6 km/hSETrack temperature 61°16°
Partly cloudyTemperature 60°16°Rain chance 3%Wind 8 mph12 km/hSSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 4%Wind 7 mph10 km/hSSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 4%Wind 5 mph8 km/hSTrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 3%Wind 6 mph9 km/hSSETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 4%Wind 5 mph7 km/hSSETrack temperature 60°16°
Partly cloudyTemperature 59°15°Rain chance 5%Wind 3 mph4 km/hETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 2%Wind 2 mph4 km/hESETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 4%Wind 3 mph5 km/hESETrack temperature 59°15°
OvercastTemperature 60°15°Rain chance 2%Wind 3 mph5 km/hSSETrack temperature 60°15°
OvercastTemperature 60°15°Rain chance 1%Wind 3 mph4 km/hSSETrack temperature 60°15°
OvercastTemperature 60°15°Rain chance 1%Wind 2 mph3 km/hSETrack temperature 60°15°
OvercastTemperature 57°14°Rain chance 1%Wind 3 mph4 km/hSETrack temperature 57°14°
OvercastTemperature 58°15°Rain chance 1%Wind 5 mph8 km/hETrack temperature 58°15°
OvercastTemperature 59°15°Rain chance 1%Wind 7 mph11 km/hETrack temperature 60°16°
OvercastTemperature 60°16°Rain chance 1%Wind 7 mph11 km/hESETrack temperature 67°19°
OvercastTemperature 62°17°Rain chance 1%Wind 6 mph10 km/hSSETrack temperature 72°22°
OvercastTemperature 63°17°Rain chance 1%Wind 6 mph9 km/hSSETrack temperature 75°24°
OvercastTemperature 64°18°Rain chance 1%Wind 7 mph11 km/hSSETrack temperature 71°22°
OvercastTemperature 64°18°Rain chance 1%Wind 8 mph13 km/hSTrack temperature 70°21°
Light rainTemperature 63°17°Rain chance 2%Wind 10 mph16 km/hSTrack temperature 65°18°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude2,006ft611mField elevation 1,385 ft
Air density1.155kg/m³94.3% of standard (RAD)
Water grains74grgrains per lb of dry air
Track temp (est.)72°F22°CDirt in 287 W/m² sun
Dew point58°F14°C81% humidity
Barometer30.11inHg1020hPaFalling over 3 h
SurfaceTackyTacky: some moisture in the top layer
Rain, last 48 h0.15in3.7mmat the track
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.
This week
Day by day
TodayOct 3165°18°60°16° 59%Green flag
TomorrowNov 164°18°57°14° 5%Red flag
MonNov 274°24°61°16° 68%Yellow flag
TueNov 363°17°54°12° 59%Yellow flag
WedNov 470°21°51°11° 5%Green flag
ThuNov 562°17°52°11° 9%Green flag
FriNov 661°16°48°9° 3%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Green flag
Overcast
65°18°60°16°
59%
20 mph33 km/h SE
75°24°
2,066 ft630 m
7:52 AM · 6:33 PM
Tomorrow Nov 1
Red flagrain
Light rain
64°18°57°14°
5% 0.06 in1.4 mm
25 mph40 km/h SSE
75°24°
2,076 ft633 m
6:53 AM · 5:32 PM
Mon Nov 2
Yellow flaggusty wind
Light drizzle
74°24°61°16°
68% 0.06 in1.4 mm
45 mph72 km/h S
84°29°
3,265 ft995 m
6:54 AM · 5:31 PM
Tue Nov 3
Yellow flaggusty wind
Overcast
63°17°54°12°
59%
31 mph50 km/h NW
79°26°
2,037 ft621 m
6:55 AM · 5:29 PM
Wed Nov 4
Green flag
Partly cloudy
70°21°51°11°
5%
13 mph21 km/h S
91°33°
2,589 ft789 m
6:57 AM · 5:28 PM
Thu Nov 5
Green flag
Light drizzle
62°17°52°11°
9% 0.01 in0.3 mm
19 mph30 km/h ENE
73°23°
2,036 ft621 m
6:58 AM · 5:27 PM
Fri Nov 6
Green flag
Overcast
61°16°48°9°
3%
17 mph27 km/h N
76°24°
1,942 ft592 m
6:59 AM · 5:26 PM
Flags judge the racing hours, 9 am to 10 pm at the track. Days marked partial are at the edge of the forecast.
Today’s remaining 8 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
64°18°
58°14°
81%
30.11 inHg1020 hPa
2,006 ft611 m
1.155
74
72°22°
11 mph18 km/h S
27%
62°17°
58°14°
85%
30.12 inHg1020 hPa
1,903 ft580 m
1.158
74
66°19°
8 mph13 km/h SSE
17%
62°17°
59°15°
90%
30.12 inHg1020 hPa
1,894 ft577 m
1.159
78
64°18°
6 mph10 km/h SE · gusts 13 mph22 km/h
12%
61°16°
58°14°
90%
30.15 inHg1021 hPa
1,775 ft541 m
1.163
75
61°16°
4 mph6 km/h SE · gusts 12 mph19 km/h
8%
60°16°
58°14°
91%
30.15 inHg1021 hPa
1,743 ft531 m
1.164
74
60°16°
8 mph12 km/h SSE · gusts 16 mph26 km/h
3%
60°16°
58°14°
92%
30.15 inHg1021 hPa
1,726 ft526 m
1.164
74
60°16°
7 mph10 km/h SSE · gusts 16 mph25 km/h
4%
60°16°
58°15°
94%
30.15 inHg1021 hPa
1,718 ft524 m
1.165
75
60°16°
5 mph8 km/h S · gusts 14 mph22 km/h
4%
60°16°
59°15°
95%
30.16 inHg1021 hPa
1,720 ft524 m
1.165
77
60°16°
6 mph9 km/h SSE
3%
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.
Raceway Weather Pro
Plan the whole week at 81 Speedway
Pit box, all week
Every forecast hour for the next seven days at 81 Speedway: 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 81 Speedway, and a heads-up three days out.
OvercastTemperature 61°16°Rain chance 8%Wind 4 mph6 km/hSETrack temperature 61°16°
Partly cloudyTemperature 60°16°Rain chance 3%Wind 8 mph12 km/hSSETrack temperature 60°16°
Light rainTemperature 63°17°Rain chance 2%Wind 10 mph16 km/hSTrack temperature 65°18°
74°24° 61°16° 68%Yellow flag
70°21° 51°11° 5%Green flag