NowOvercastTemperature 63°17°Rain chance 6%Wind 7 mph12 km/hSETrack temperature 69°21°
OvercastTemperature 62°16°Rain chance 10%Wind 5 mph8 km/hSETrack temperature 62°17°
OvercastTemperature 60°16°Rain chance 11%Wind 7 mph12 km/hSETrack temperature 60°16°
Partly cloudyTemperature 58°15°Rain chance 8%Wind 7 mph11 km/hSETrack temperature 58°15°
ClearTemperature 57°14°Rain chance 12%Wind 7 mph12 km/hSETrack temperature 57°14°
Mostly clearTemperature 56°13°Rain chance 13%Wind 5 mph8 km/hSSETrack temperature 56°13°
OvercastTemperature 55°13°Rain chance 14%Wind 5 mph8 km/hSETrack temperature 55°13°
OvercastTemperature 54°12°Rain chance 9%Wind 3 mph5 km/hSETrack temperature 54°12°
OvercastTemperature 53°12°Rain chance 14%Wind 1 mph2 km/hENETrack temperature 53°12°
OvercastTemperature 53°12°Rain chance 5%Wind 2 mph4 km/hENETrack temperature 53°12°
OvercastTemperature 52°11°Rain chance 3%Wind 5 mph7 km/hESETrack temperature 52°11°
OvercastTemperature 52°11°Rain chance 3%Wind 5 mph8 km/hESETrack temperature 52°11°
Mostly clearTemperature 51°11°Rain chance 4%Wind 4 mph6 km/hSETrack temperature 51°11°
Partly cloudyTemperature 51°11°Rain chance 4%Wind 4 mph6 km/hSETrack temperature 51°11°
OvercastTemperature 58°15°Rain chance 4%Wind 7 mph12 km/hSETrack temperature 58°15°
OvercastTemperature 59°15°Rain chance 5%Wind 9 mph14 km/hSSETrack temperature 59°15°
OvercastTemperature 59°15°Rain chance 4%Wind 8 mph12 km/hSSETrack temperature 60°15°
OvercastTemperature 60°16°Rain chance 3%Wind 11 mph17 km/hSTrack temperature 65°18°
OvercastTemperature 61°16°Rain chance 3%Wind 10 mph16 km/hSTrack temperature 67°19°
OvercastTemperature 63°17°Rain chance 3%Wind 10 mph15 km/hSTrack temperature 72°22°
OvercastTemperature 63°17°Rain chance 2%Wind 10 mph16 km/hSTrack temperature 69°20°
OvercastTemperature 64°18°Rain chance 2%Wind 10 mph15 km/hSTrack temperature 71°22°
OvercastTemperature 64°18°Rain chance 2%Wind 10 mph15 km/hSSETrack temperature 71°22°
OvercastTemperature 64°18°Rain chance 2%Wind 10 mph17 km/hSETrack temperature 74°23°
Hours in your time zone (the track's when they match). Track temperature is an estimate.
Pit box
The racer numbers
Density altitude1,634ft498mField elevation 1,194 ft
Air density1.167kg/m³95.3% of standard (RAD)
Water grains70grgrains per lb of dry air
Track temp (est.)69°F21°CDirt in 187 W/m² sun
Dew point56°F14°C78% humidity
Barometer30.19inHg1022hPaRising 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 3165°18°55°13° 50%Green flag
TomorrowNov 164°18°51°11° 17%Yellow flag
MonNov 268°20°60°15° 99%Yellow flag
TueNov 364°18°47°8° 78%Yellow flag
WedNov 462°17°48°9° 28%Green flag
ThuNov 554°12°49°9° 11%Green flag
FriNov 656°13°51°11° 10%Green flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Oct 31
Green flag
Overcast
65°18°55°13°
50%
16 mph26 km/h SSE
79°26°
1,732 ft528 m
7:50 AM · 6:18 PM
Tomorrow Nov 1
Yellow flaggusty wind
Drizzle
64°18°51°11°
17% 0.03 in0.7 mm
27 mph43 km/h SSE
74°23°
1,758 ft536 m
6:52 AM · 5:17 PM
Mon Nov 2
Yellow flaggusty wind
Drizzle
68°20°60°15°
99% 0.29 in7.5 mm
49 mph78 km/h S
68°20°
2,699 ft823 m
6:53 AM · 5:16 PM
Tue Nov 3
Yellow flaggusty wind
Overcast
64°18°47°8°
78% 0.01 in0.2 mm
34 mph54 km/h W
70°21°
1,627 ft496 m
6:54 AM · 5:15 PM
Wed Nov 4
Green flag
Overcast
62°17°48°9°
28%
29 mph47 km/h WNW
76°24°
1,875 ft571 m
6:55 AM · 5:13 PM
Thu Nov 5
Green flag
Overcast
54°12°49°9°
11%
13 mph22 km/h NNE
57°14°
1,173 ft358 m
6:57 AM · 5:12 PM
Fri Nov 6
Green flag
Overcast
56°13°51°11°
10%
8 mph13 km/h NE
62°16°
1,354 ft413 m
6:58 AM · 5:11 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 7 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
63°17°
56°14°
78%
30.19 inHg1022 hPa
1,634 ft498 m
1.167
70
69°21°
7 mph12 km/h SE
6%
62°16°
57°14°
85%
30.22 inHg1023 hPa
1,501 ft458 m
1.172
72
62°17°
5 mph8 km/h SE
10%
60°16°
57°14°
88%
30.23 inHg1024 hPa
1,406 ft429 m
1.175
71
60°16°
7 mph12 km/h SE
11%
58°15°
56°13°
91%
30.22 inHg1023 hPa
1,304 ft397 m
1.179
69
58°15°
7 mph11 km/h SE · gusts 15 mph24 km/h
8%
57°14°
55°13°
93%
30.22 inHg1023 hPa
1,228 ft374 m
1.182
67
57°14°
7 mph12 km/h SE · gusts 15 mph24 km/h
12%
56°13°
54°12°
92%
30.23 inHg1024 hPa
1,096 ft334 m
1.186
63
56°13°
5 mph8 km/h SSE · gusts 15 mph24 km/h
13%
55°13°
52°11°
91%
30.22 inHg1023 hPa
1,046 ft319 m
1.188
60
55°13°
5 mph8 km/h SE · gusts 13 mph22 km/h
14%
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 Harlan
Pit box, all week
Every forecast hour for the next seven days at Harlan: 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 Harlan, and a heads-up three days out.
IMCA Late Models, IMCA Stock Cars, IMCA Hobby Stocks, IMCA Northern SportMods, IMCA Sport Compacts, World of Outlaws Late Models, High Limit Racing, Lucas Oil Late Model Dirt Series
OvercastTemperature 60°16°Rain chance 11%Wind 7 mph12 km/hSETrack temperature 60°16°
Partly cloudyTemperature 58°15°Rain chance 8%Wind 7 mph11 km/hSETrack temperature 58°15°
ClearTemperature 57°14°Rain chance 12%Wind 7 mph12 km/hSETrack temperature 57°14°
64°18° 51°11° 17%Yellow flag