| What it does | Predict school closures and delays with live weather for any US or Canadian location
| Construction calculators that show their math
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
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| Pricing | Not given
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| Key features | - Live weather data integration from OpenWeatherMap and Open-Meteo
- Multi-factor weather analysis including temperature, snowfall, wind, visibility, and ice risk
- Probability scoring with detailed factor breakdown
- Support for US ZIP codes and Canadian postal codes
- GPS location detection
- 50+ specialized winter calculators
- Mobile-responsive progressive web app design
- Local browser storage for recent searches with no account required
- Hourly forecast view
- Saved locations feature
| - Every constant cited to ASTM, CMHA, or datasheet
- Two calculation methods shown separately
- Free and private, no account required
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| What makes it different | - Explains the factors behind each prediction rather than showing an unexplained percentage
- Independent platform not affiliated with school districts or government agencies
- Continuous model refinement based on outcome review against reported closures
- Privacy-first architecture with no location data transmission or sale
- Accessible design with keyboard navigation and WCAG compliance
| - Every constant traced to named source and shown next to result
- Shows both methods when they disagree instead of averaging them
- Solves massive discrepancy in published block fill volumes
- Calculations run in browser with no data storage
- Built on version-controlled, auditable reference data modules
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 10 ● no change since last check | 8 ● no change since last check |
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| Trust Flow (Majestic) | 2 | 5 |
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| Citation Flow (Majestic) | 11 | 22 |
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| Referring domains (Majestic) | 29 | 7 |
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Snow Day Calculator
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