Wind on the strip—The strip’s direction is not mapped
Computed from the forecast air temperature, dew point and station pressure (NWS formulas; the correction factor by SAE J1349 and the older 60 °F STD standard). 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
TodayNov 852°11°42°6° 39%Yellow flag
TomorrowNov 948°9°42°6° 26%Yellow flag
TueNov 1059°15°39°4° 3%Yellow flag
WedNov 1156°13°41°5° 16%Green flag
ThuNov 1245°7°42°5° 69%Red flag
FriNov 1345°7°36°2° 60%Red flag
SatNov 1436°2°34°1° 31%Red flagpartial
Day
Flag
Sky
High / low
Rain
Gusts
Track temp
Density alt.
Sunrise · sunset
Today Nov 8
Yellow flaggusty wind
Overcast
52°11°42°6°
39%
41 mph66 km/h WSW
61°16°
779 ft237 m
6:56 AM · 4:59 PM
Tomorrow Nov 9
Yellow flaggusty wind
Light drizzle
48°9°42°6°
26% 0.1 in2.5 mm
34 mph55 km/h WNW
50°10°
116 ft35 m
6:58 AM · 4:58 PM
Tue Nov 10
Yellow flaggusty wind
Overcast
59°15°39°4°
3%
34 mph54 km/h WSW
71°22°
1,071 ft326 m
6:59 AM · 4:57 PM
Wed Nov 11
Green flag
Overcast
56°13°41°5°
16%
10 mph16 km/h SW
73°23°
805 ft245 m
7:00 AM · 4:56 PM
Thu Nov 12
Red flag60% chance of rain, gusty wind
Heavy drizzle
45°7°42°5°
69% 0.7 in17.8 mm
37 mph60 km/h ENE
46°8°
398 ft121 m
7:02 AM · 4:55 PM
Fri Nov 13
Red flagsnow, 31% chance of showers
Light snow
45°7°36°2°
60% 0.32 in8.2 mm
37 mph59 km/h NNE
42°5°
296 ft90 m
7:03 AM · 4:54 PM
Sat Nov 14
Red flagsnow, cold
Snow
36°2°34°1°
31% 0.29 in7.3 mm
26 mph41 km/h NW
39°4°
-26 ft-8 m
7:04 AM · 4:53 PM
Flags judge the racing hours: 9 am to 10 pm at the track for a drag strip. National Weather Service alerts raise them. Days marked partial are at the edge of the forecast. How the flags work
Today’s remaining 10 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
51°11°
40°4°
64%
29.76 inHg1008 hPa
718 ft219 m
1.200
37
59°15°
20 mph33 km/h WSW · gusts 34 mph55 km/h
2%
52°11°
40°5°
64%
29.75 inHg1007 hPa
770 ft235 m
1.198
38
57°14°
20 mph32 km/h WSW · gusts 36 mph57 km/h
2%
52°11°
41°5°
66%
29.75 inHg1008 hPa
779 ft237 m
1.197
39
55°13°
21 mph34 km/h WSW · gusts 41 mph66 km/h
3%
52°11°
42°5°
68%
29.75 inHg1007 hPa
764 ft233 m
1.198
40
52°11°
19 mph30 km/h WSW · gusts 39 mph63 km/h
2%
51°11°
40°5°
67%
29.76 inHg1008 hPa
681 ft208 m
1.201
38
51°11°
16 mph25 km/h W · gusts 32 mph51 km/h
4%
50°10°
41°5°
72%
29.77 inHg1008 hPa
597 ft182 m
1.204
39
50°10°
15 mph24 km/h W · gusts 30 mph49 km/h
2%
49°10°
41°5°
73%
29.76 inHg1008 hPa
563 ft172 m
1.205
39
49°10°
14 mph23 km/h WSW · gusts 29 mph47 km/h
3%
49°10°
42°6°
77%
29.76 inHg1008 hPa
589 ft180 m
1.204
41
49°10°
13 mph20 km/h W · gusts 29 mph46 km/h
8%
49°9°
43°6°
81%
29.76 inHg1008 hPa
557 ft170 m
1.205
43
49°9°
12 mph19 km/h W · gusts 27 mph44 km/h
13%
48°9°
44°6°
85%
29.75 inHg1007 hPa
512 ft156 m
1.207
43
48°9°
14 mph22 km/h W · gusts 32 mph51 km/h
39%
Every hour from the forecast, the same arithmetic as the pit box above (NWS density-altitude formula; track temperature is an estimate). Hours are track time.
Raceway Weather Pro
Plan the whole week at Lancaster
Pit box, all week
Every forecast hour for the next seven days at Lancaster: 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 Lancaster, and a heads-up three days out.
Typical for November here: highs around 48°9°, lows 34°1°, rain on 45% of days.
Month by month
Average highs and lows, rain days, gusty days, freezing and hot days for all twelve months at Lancaster, from 5 years of records. Part of Raceway Weather Pro.
OvercastTemperature 52°11°Rain chance 2%Wind 19 mph30 km/hWSWTrack temperature 52°11°Density altitude 764 ft233 m
Partly cloudyTemperature 49°9°Rain chance 13%Wind 12 mph19 km/hWTrack temperature 49°9°Density altitude 557 ft170 m
DrizzleTemperature 44°7°Rain chance 17%Wind 12 mph19 km/hWNWTrack temperature 44°7°Density altitude 98 ft30 m
Light rainTemperature 44°7°Rain chance 26%Wind 12 mph19 km/hWNWTrack temperature 44°7°Density altitude 53 ft16 m
45°7° 36°2° 60%Red flag