- Track temp
- 70°F21°C
- Rain chance
- 0%
- Wind
- 14mph22km/hW
- Density alt.
- 1,107ft337m
- Barometer 29.84 inHg1011 hPa falling
- Humidity 45%
Forecast updated · Open-Meteo
Hour by hour
ClearTemperature 55°13°Rain chance 0%Wind 14 mph22 km/hWTrack temperature 70°21°Density altitude 1,107 ft337 mClearTemperature 55°13°Rain chance 0%Wind 13 mph22 km/hWTrack temperature 66°19°Density altitude 1,126 ft343 mClearTemperature 54°12°Rain chance 0%Wind 11 mph17 km/hWSWTrack temperature 60°15°Density altitude 1,083 ft330 m
ClearTemperature 50°10°Rain chance 0%Wind 7 mph11 km/hWTrack temperature 50°10°Density altitude 771 ft235 mClearTemperature 47°8°Rain chance 1%Wind 5 mph8 km/hWTrack temperature 47°8°Density altitude 559 ft170 mMostly clearTemperature 45°7°Rain chance 2%Wind 5 mph8 km/hWSWTrack temperature 45°7°Density altitude 478 ft146 mClearTemperature 46°8°Rain chance 1%Wind 6 mph9 km/hWSWTrack temperature 46°8°Density altitude 481 ft147 m
Partly cloudyTemperature 47°8°Rain chance 0%Wind 6 mph10 km/hWTrack temperature 47°8°Density altitude 544 ft166 mClearTemperature 46°8°Rain chance 0%Wind 9 mph15 km/hWSWTrack temperature 46°8°Density altitude 494 ft151 mClearTemperature 44°7°Rain chance 0%Wind 6 mph10 km/hWSWTrack temperature 44°7°Density altitude 428 ft130 mClearTemperature 43°6°Rain chance 0%Wind 6 mph10 km/hWTrack temperature 43°6°Density altitude 357 ft109 mMostly clearTemperature 43°6°Rain chance 1%Wind 6 mph9 km/hWSWTrack temperature 43°6°Density altitude 376 ft115 mClearTemperature 42°6°Rain chance 1%Wind 7 mph11 km/hWSWTrack temperature 42°6°Density altitude 296 ft90 mClearTemperature 41°5°Rain chance 1%Wind 5 mph9 km/hWSWTrack temperature 41°5°Density altitude 253 ft77 mClearTemperature 40°5°Rain chance 1%Wind 5 mph8 km/hSWTrack temperature 40°5°Density altitude 212 ft65 mMostly clearTemperature 40°5°Rain chance 2%Wind 6 mph10 km/hWSWTrack temperature 40°5°Density altitude 235 ft72 m
OvercastTemperature 40°5°Rain chance 3%Wind 7 mph11 km/hWTrack temperature 40°5°Density altitude 205 ft62 m
OvercastTemperature 42°6°Rain chance 7%Wind 8 mph13 km/hWTrack temperature 42°6°Density altitude 279 ft85 mOvercastTemperature 45°7°Rain chance 7%Wind 11 mph17 km/hWTrack temperature 48°9°Density altitude 432 ft132 m
Partly cloudyTemperature 47°8°Rain chance 8%Wind 17 mph27 km/hWNWTrack temperature 50°10°Density altitude 567 ft173 mOvercastTemperature 48°9°Rain chance 4%Wind 18 mph28 km/hWNWTrack temperature 52°11°Density altitude 605 ft184 mOvercastTemperature 49°10°Rain chance 5%Wind 18 mph29 km/hNWTrack temperature 55°13°Density altitude 678 ft207 mOvercastTemperature 50°10°Rain chance 4%Wind 18 mph30 km/hNWTrack temperature 55°13°Density altitude 710 ft216 mOvercastTemperature 51°11°Rain chance 2%Wind 19 mph30 km/hNWTrack temperature 59°15°Density altitude 757 ft231 mHours are track time (EST). Track temperature is an estimate. DA is density altitude.
The racer numbers
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.
Day by day
- TodayNov 855°13° 43°6° 2%Green flag
- TomorrowNov 951°11° 39°4° 8%Yellow flag
- TueNov 1059°15° 35°2° 1%Yellow flag
- WedNov 1156°14° 38°3° 1%Green flag
- ThuNov 12
56°14° 45°7° 76%Red flag - FriNov 13
49°9° 39°4° 71%Red flag - SatNov 1441°5° 36°2° 33%Yellow flagpartial
| Day | Flag | Sky | High / low | Rain | Gusts | Track temp | Density alt. | Sunrise · sunset |
|---|---|---|---|---|---|---|---|---|
| Today Nov 8 | Green flag | Overcast | 55°13° 43°6° | 2% | 29 mph46 km/h W | 71°22° | 1,126 ft343 m | 6:43 AM · 4:55 PM |
| Tomorrow Nov 9 | Yellow flaggusty wind | Overcast | 51°11° 39°4° | 8% | 33 mph53 km/h WNW | 59°15° | 757 ft231 m | 6:44 AM · 4:54 PM |
| Tue Nov 10 | Yellow flaggusty wind | Overcast | 59°15° 35°2° | 1% | 26 mph41 km/h WSW | 75°24° | 1,330 ft405 m | 6:46 AM · 4:53 PM |
| Wed Nov 11 | Green flag | Overcast | 56°14° 38°3° | 1% | 8 mph13 km/h WSW | 78°25° | 1,106 ft337 m | 6:47 AM · 4:52 PM |
| Thu Nov 12 | Red flag76% chance of rain | Heavy drizzle | 56°14° 45°7° | 76% 0.28 in7 mm | 36 mph58 km/h SE | 65°18° | 1,463 ft446 m | 6:48 AM · 4:51 PM |
| Fri Nov 13 | Red flagrain | Showers | 49°9° 39°4° | 71% 0.98 in24.8 mm | 24 mph38 km/h NNE | 49°9° | 1,338 ft408 m | 6:49 AM · 4:50 PM |
| Sat Nov 14 | Yellow flagcold | Overcast | 41°5° 36°2° | 33% 0.02 in0.5 mm | 29 mph47 km/h WNW | 46°8° | 577 ft176 m | 6:51 AM · 4:49 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
Every hour, every number
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 55°13° | 34°1° | 45% | 29.84 inHg1011 hPa | 1,107 ft337 m | 1.186 | 30 | 70°21° | 14 mph22 km/h W | 0% | |
| 55°13° | 34°1° | 44% | 29.83 inHg1010 hPa | 1,126 ft343 m | 1.185 | 29 | 66°19° | 13 mph22 km/h W · gusts 20 mph33 km/h | 0% | |
| 54°12° | 34°1° | 46% | 29.80 inHg1009 hPa | 1,083 ft330 m | 1.187 | 30 | 60°15° | 11 mph17 km/h WSW · gusts 23 mph36 km/h | 0% | |
| 50°10° | 32°0° | 51% | 29.83 inHg1010 hPa | 771 ft235 m | 1.198 | 28 | 50°10° | 7 mph11 km/h W · gusts 17 mph27 km/h | 0% | |
| 47°8° | 31°0° | 55% | 29.84 inHg1011 hPa | 559 ft170 m | 1.205 | 27 | 47°8° | 5 mph8 km/h W | 1% | |
| 45°7° | 31°-1° | 57% | 29.83 inHg1010 hPa | 478 ft146 m | 1.208 | 26 | 45°7° | 5 mph8 km/h WSW | 2% | |
| 46°8° | 30°-1° | 55% | 29.83 inHg1010 hPa | 481 ft147 m | 1.208 | 25 | 46°8° | 6 mph9 km/h WSW · gusts 20 mph32 km/h | 1% | |
| 47°8° | 30°-1° | 53% | 29.84 inHg1011 hPa | 544 ft166 m | 1.206 | 26 | 47°8° | 6 mph10 km/h W · gusts 20 mph33 km/h | 0% | |
| 46°8° | 30°-1° | 54% | 29.84 inHg1011 hPa | 494 ft151 m | 1.207 | 25 | 46°8° | 9 mph15 km/h WSW · gusts 23 mph36 km/h | 0% | |
| 44°7° | 31°-1° | 59% | 29.82 inHg1010 hPa | 428 ft130 m | 1.210 | 26 | 44°7° | 6 mph10 km/h WSW · gusts 21 mph33 km/h | 0% |
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.
Plan the whole week at Numidia
Pit box, all week
Every forecast hour for the next seven days at Numidia: 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 Numidia, and a heads-up three days out.
A year at Numidia
Typical for November here: highs around 50°10°, lows 34°1°, rain on 29% of days.
5-year averages from the Open-Meteo archive at the track's coordinates.
Getting to Numidia
Catawissa, Pennsylvania
No street address published; directions go to the track itself.
We have not checked parking and camping here yet. The track’s own site has them: official site.
Facts
- Location
- Catawissa, Pennsylvania
- Layout
- Quarter-mile drag strip
- Length
- Quarter mile (1,320 ft)
- Opened
- 1964
- Series
- NHRA
- Time zone
- America/New York
- Elevation
- 951 ft (290 m)