NowOvercastTemperature 66°19°Rain chance 4%Wind 6 mph9 km/hESETrack temperature 73°23°
OvercastTemperature 64°18°Rain chance 2%Wind 4 mph6 km/hENETrack temperature 69°20°
OvercastTemperature 61°16°Rain chance 3%Wind 5 mph8 km/hENETrack temperature 61°16°
OvercastTemperature 59°15°Rain chance 5%Wind 4 mph7 km/hENETrack temperature 59°15°
OvercastTemperature 58°14°Rain chance 5%Wind 5 mph8 km/hENETrack temperature 58°14°
OvercastTemperature 57°14°Rain chance 3%Wind 4 mph7 km/hENETrack temperature 57°14°
OvercastTemperature 57°14°Rain chance 4%Wind 3 mph5 km/hNETrack temperature 57°14°
OvercastTemperature 56°14°Rain chance 8%Wind 4 mph6 km/hNETrack temperature 56°14°
OvercastTemperature 56°13°Rain chance 12%Wind 6 mph10 km/hENETrack temperature 56°13°
OvercastTemperature 55°13°Rain chance 21%Wind 4 mph6 km/hNNETrack temperature 55°13°
OvercastTemperature 55°13°Rain chance 10%Wind 3 mph5 km/hNTrack temperature 55°13°
OvercastTemperature 55°13°Rain chance 11%Wind 2 mph4 km/hESETrack temperature 55°13°
OvercastTemperature 54°12°Rain chance 8%Wind 3 mph5 km/hNETrack temperature 54°12°
OvercastTemperature 54°12°Rain chance 7%Wind 4 mph6 km/hNETrack temperature 54°12°
OvercastTemperature 53°12°Rain chance 7%Wind 2 mph4 km/hNETrack temperature 53°12°
OvercastTemperature 53°12°Rain chance 8%Wind 4 mph6 km/hNETrack temperature 53°12°
OvercastTemperature 53°12°Rain chance 11%Wind 4 mph6 km/hNETrack temperature 54°12°
OvercastTemperature 57°14°Rain chance 15%Wind 1 mph2 km/hESETrack temperature 61°16°
OvercastTemperature 59°15°Rain chance 17%Wind 4 mph6 km/hSETrack temperature 62°17°
OvercastTemperature 60°16°Rain chance 17%Wind 4 mph6 km/hSETrack temperature 64°18°
OvercastTemperature 62°16°Rain chance 17%Wind 7 mph12 km/hSSETrack temperature 65°18°
OvercastTemperature 62°17°Rain chance 22%Wind 7 mph10 km/hSSETrack temperature 66°19°
OvercastTemperature 62°16°Rain chance 24%Wind 6 mph10 km/hSTrack temperature 64°18°
OvercastTemperature 62°17°Rain chance 17%Wind 5 mph8 km/hSSETrack 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 altitude944ft288mField elevation 587 ft
Air density1.192kg/m³97.3% of standard (RAD)
Water grains54grgrains per lb of dry air
Track temp (est.)73°F23°CDirt in 211 W/m² sun
Dew point50°F10°C56% humidity
Barometer30.26inHg1025hPaFalling over 3 h
SurfaceDryDry, likely dusty: little rain in 48 h
Rain, last 48 h0.03in0.7mmat 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 3166°19°51°11° 51%Green flag
TomorrowNov 162°17°53°12° 24%Green flag
MonNov 264°18°54°12° 34%Yellow flag
TueNov 371°22°58°14° 70%Yellow flag
WedNov 465°19°52°11° 44%Green flag
ThuNov 561°16°50°10° 23%Green flag
FriNov 654°12°51°11° 23%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Green flag
Overcast
66°19°51°11°
51% 0.03 in0.7 mm
17 mph27 km/h E
80°27°
961 ft293 m
7:25 AM · 5:54 PM
Tomorrow Nov 1
Green flag
Overcast
62°17°53°12°
24%
19 mph31 km/h ESE
66°19°
679 ft207 m
6:26 AM · 4:53 PM
Mon Nov 2
Yellow flaggusty wind
Overcast
64°18°54°12°
34%
37 mph60 km/h SSE
68°20°
1,210 ft369 m
6:27 AM · 4:51 PM
Tue Nov 3
Yellow flaggusty wind
Drizzle
71°22°58°14°
70% 0.08 in2 mm
45 mph72 km/h SSW
80°27°
1,845 ft562 m
6:29 AM · 4:50 PM
Wed Nov 4
Green flag
Overcast
65°19°52°11°
44%
24 mph39 km/h WSW
78°25°
1,398 ft426 m
6:30 AM · 4:49 PM
Thu Nov 5
Green flag
Overcast
61°16°50°10°
23%
15 mph23 km/h N
75°24°
934 ft285 m
6:31 AM · 4:48 PM
Fri Nov 6
Green flag
Light drizzle
54°12°51°11°
23% 0.02 in0.6 mm
17 mph27 km/h N
56°13°
557 ft170 m
6:32 AM · 4:47 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
66°19°
50°10°
56%
30.26 inHg1025 hPa
944 ft288 m
1.192
54
73°23°
6 mph9 km/h ESE
4%
64°18°
51°10°
61%
30.27 inHg1025 hPa
834 ft254 m
1.195
55
69°20°
4 mph6 km/h ENE
2%
61°16°
50°10°
66%
30.31 inHg1026 hPa
592 ft180 m
1.204
53
61°16°
5 mph8 km/h ENE
3%
59°15°
50°10°
72%
30.31 inHg1026 hPa
447 ft136 m
1.209
54
59°15°
4 mph7 km/h ENE
5%
58°14°
49°9°
73%
30.30 inHg1026 hPa
349 ft106 m
1.212
52
58°14°
5 mph8 km/h ENE
5%
57°14°
49°9°
74%
30.29 inHg1026 hPa
336 ft102 m
1.213
52
57°14°
4 mph7 km/h ENE
3%
57°14°
48°9°
73%
30.31 inHg1026 hPa
292 ft89 m
1.215
51
57°14°
3 mph5 km/h NE
4%
56°14°
48°9°
72%
30.31 inHg1026 hPa
268 ft82 m
1.215
49
56°14°
4 mph6 km/h NE
8%
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 LaSalle
Pit box, all week
Every forecast hour for the next seven days at LaSalle: 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 LaSalle, and a heads-up three days out.
OvercastTemperature 61°16°Rain chance 3%Wind 5 mph8 km/hENETrack temperature 61°16°
71°22° 58°14° 70%Yellow flag