Bloom-time cold snap
Input: Low -1.5°C / High 14°C / RH 72% / Wind 1.5 m/s / Sun Low / Stage Bloom
Output: Overall: Warning, frost alert is high and the bloom-time cold snap is the main driver
Orchard Frost and Heat Alert Checker (Quick Check)
See frost and heat alert levels from forecast low/high, humidity, wind, sun exposure, and stage.
This is a quick check, not a precise forecast service.
Minimal input
Separate frost and heat
Shareable URL and restore
Built for multiple languages
Notice
This tool is a quick check. Use local official forecasts and orchard rules first.
How to use
- Enter the forecast low, forecast high, humidity, and wind speed.
- Choose sun exposure and growth stage.
- Check the unit system and switch if needed.
- Review the overall, frost, and heat cards.
- Copy the result or create a share URL.
Examples
Fruit growth heat wave
Input: Low 22°C / High 38°C / RH 28% / Wind 4 m/s / Sun High / Stage Fruit Growth
Output: Overall: Critical, heat alert is high and dry air plus strong sun are the main drivers
Glossary
Forecast low / forecast high
The lowest and highest temperatures in the forecast window.
Relative humidity
The amount of water vapor in the air, shown as percent.
Sun exposure
A rough level of clear sky or strong sun in the same forecast window.
Growth stage
The orchard stage that changes how sensitive the tree is to frost and heat.
Calculation formulas
- Overall alert = max(frost alert, heat alert)
- Frost alert = base + stage + wind + sun + humidity
- Heat alert = base + stage + wind + sun + humidity
How the check works
Frost and heat are calculated separately, so the main driver stays obvious.
- Show frost and heat separately so the main driver is obvious.
- Treat sun exposure and wind as secondary factors; temperature and stage drive the score.
- Keep unknown stage usable with neutral sensitivity.
FAQ
Is this an official forecast service?
No. It only turns your forecast values into a quick orchard alert level.
Why do I need both forecast low and high?
Frost and heat risks come from different parts of the day.
How much do wind and humidity matter?
They are secondary factors. Temperature and stage drive the main score.
Can I use Fahrenheit and mph?
Yes. Switching the unit system updates both display and saved values.
Notice
- If official frost or heat alerts exist, follow them first.
- Thresholds vary by cultivar and region. Use the result as a guide.
- If night and day conditions differ a lot, recheck the more severe side. Decide frost or heat actions by your own orchard rules.