NowOvercastTemperature 49°9°Rain chance 3%Wind 5 mph7 km/hETrack temperature 50°10°
OvercastTemperature 48°9°Rain chance 7%Wind 3 mph6 km/hESETrack temperature 49°10°
OvercastTemperature 48°9°Rain chance 9%Wind 3 mph5 km/hENETrack temperature 48°9°
OvercastTemperature 47°9°Rain chance 15%Wind 5 mph7 km/hESETrack temperature 47°9°
OvercastTemperature 47°9°Rain chance 7%Wind 5 mph8 km/hESETrack temperature 47°9°
OvercastTemperature 47°9°Rain chance 10%Wind 4 mph7 km/hSETrack temperature 47°9°
OvercastTemperature 47°9°Rain chance 7%Wind 3 mph5 km/hESETrack temperature 47°9°
OvercastTemperature 48°9°Rain chance 3%Wind 4 mph6 km/hSETrack temperature 48°9°
Light drizzleTemperature 48°9°Rain chance 3%Wind 4 mph6 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 3%Wind 4 mph6 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 2%Wind 3 mph5 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 3%Wind 3 mph6 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 3%Wind 3 mph4 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 4%Wind 4 mph6 km/hSSETrack temperature 48°9°
FogTemperature 50°10°Rain chance 4%Wind 5 mph9 km/hSSWTrack temperature 50°10°
FogTemperature 49°10°Rain chance 4%Wind 5 mph8 km/hSSETrack temperature 49°10°
FogTemperature 50°10°Rain chance 4%Wind 6 mph9 km/hSTrack temperature 50°10°
FogTemperature 51°10°Rain chance 4%Wind 6 mph9 km/hSTrack temperature 51°10°
FogTemperature 52°11°Rain chance 5%Wind 6 mph9 km/hSSETrack temperature 54°12°
OvercastTemperature 55°13°Rain chance 5%Wind 8 mph12 km/hSSETrack temperature 60°16°
OvercastTemperature 57°14°Rain chance 5%Wind 7 mph12 km/hSTrack temperature 63°17°
OvercastTemperature 59°15°Rain chance 4%Wind 9 mph15 km/hSTrack temperature 64°18°
OvercastTemperature 59°15°Rain chance 5%Wind 9 mph15 km/hSSETrack temperature 61°16°
OvercastTemperature 58°14°Rain chance 4%Wind 9 mph14 km/hSSETrack temperature 59°15°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude259ft79mField elevation 827 ft
Air density1.216kg/m³99.2% of standard (RAD)
Water grains45grgrains per lb of dry air
Track temp (est.)50°F10°CDirt in 42 W/m² sun
Dew point45°F7°C87% humidity
Barometer30.14inHg1021hPaFalling over 3 h
SurfaceDryDry, likely dusty: little rain in 48 h
Rain, last 48 h0.0in0mmat 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 3149°10°26°-3° 15%Yellow flag
TomorrowNov 159°15°48°9° 5%Green flag
MonNov 257°14°48°9° 95%Red flag
TueNov 348°9°41°5° 87%Yellow flag
WedNov 453°11°43°6° 37%Yellow flag
ThuNov 552°11°39°4° 8%Green flag
FriNov 658°15°45°7° 5%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Yellow flagcold
Overcast
49°10°26°-3°
15%
11 mph18 km/h E
59°15°
307 ft94 m
8:10 AM · 6:13 PM
Tomorrow Nov 1
Green flag
Drizzle
59°15°48°9°
5% 0.07 in1.9 mm
22 mph35 km/h SSE
64°18°
1,053 ft321 m
7:11 AM · 5:12 PM
Mon Nov 2
Red flagrain, gusty wind
Rain
57°14°48°9°
95% 1.67 in42.4 mm
38 mph60 km/h ENE
55°13°
1,350 ft411 m
7:13 AM · 5:10 PM
Tue Nov 3
Yellow flaggusty wind
Drizzle
48°9°41°5°
87% 0.26 in6.7 mm
40 mph65 km/h NW
48°9°
1,019 ft311 m
7:14 AM · 5:08 PM
Wed Nov 4
Yellow flaggusty wind
Overcast
53°11°43°6°
37% 0.06 in1.5 mm
38 mph61 km/h NNW
56°13°
872 ft266 m
7:16 AM · 5:07 PM
Thu Nov 5
Green flag
Overcast
52°11°39°4°
8%
24 mph39 km/h SSE
65°18°
543 ft166 m
7:17 AM · 5:05 PM
Fri Nov 6
Green flag
Partly cloudy
58°15°45°7°
5%
26 mph42 km/h S
70°21°
1,258 ft383 m
7:19 AM · 5:04 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
49°9°
45°7°
87%
30.14 inHg1021 hPa
259 ft79 m
1.216
45
50°10°
5 mph7 km/h E · gusts 11 mph18 km/h
3%
48°9°
46°8°
92%
30.14 inHg1021 hPa
225 ft69 m
1.217
47
49°10°
3 mph6 km/h ESE · gusts 11 mph17 km/h
7%
48°9°
46°8°
94%
30.15 inHg1021 hPa
162 ft49 m
1.219
47
48°9°
3 mph5 km/h ENE
9%
47°9°
46°8°
96%
30.16 inHg1021 hPa
135 ft41 m
1.220
47
47°9°
5 mph7 km/h ESE
15%
47°9°
46°8°
96%
30.14 inHg1021 hPa
166 ft51 m
1.219
48
47°9°
5 mph8 km/h ESE
7%
47°9°
47°8°
97%
30.13 inHg1020 hPa
185 ft56 m
1.218
48
47°9°
4 mph7 km/h SE
10%
47°9°
47°8°
97%
30.12 inHg1020 hPa
187 ft57 m
1.218
48
47°9°
3 mph5 km/h ESE
7%
48°9°
47°8°
97%
30.11 inHg1020 hPa
212 ft65 m
1.217
49
48°9°
4 mph6 km/h SE
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 Grand Forks
Pit box, all week
Every forecast hour for the next seven days at Grand Forks: 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 Grand Forks, and a heads-up three days out.
OvercastTemperature 47°9°Rain chance 15%Wind 5 mph7 km/hESETrack temperature 47°9°
Light drizzleTemperature 48°9°Rain chance 3%Wind 4 mph6 km/hESETrack temperature 48°9°
FogTemperature 48°9°Rain chance 3%Wind 4 mph6 km/hESETrack temperature 48°9°
57°14° 48°9° 95%Red flag
58°15° 45°7° 5%Green flagpartial