About the weather data
The numbers in this app are forecasts from weather models, not values measured in your plot.
Choose a place first to see where its data comes from and when it was issued
More details
Data sources
Hourly forecast: MET Norway (ECMWF model · CC BY 4.0) blended with the Thai Meteorological Department model for the first 48 hours · Map: NOAA GFS · Observed rain: National Hydroinformatics Data Center (thaiwater.net)
Data times
All times are Thai time · "Data as of" is when the provider issued that forecast run, not when you opened the page · The app says so if it is older than 3 hours
Rain chance vs rain amount
Rain chance (%) = probability of at least 0.1 mm of rain — the current sources don't provide it, so it shows "No data" · Rain amount (mm) = expected rain in that hour · Beyond about 2–3 days the forecast comes in 6-hour blocks averaged per hour, so short heavy showers look lighter
Wind and gusts
Measured at a height of 10 metres per meteorological standard. Near the ground or at nozzle height, wind is usually weaker · A gust is the peak instantaneous wind · Wind direction is the direction the wind blows "from"
Forecast resolution
Models compute on grid cells several kilometres wide. Choosing a plot does not make the forecast as fine as the plot's edge. Nearby plots may get the same value.
When there is no data
A field the provider did not send shows "No data", not 0 · Days with missing hours carry a "Data for this day is incomplete" label · If new data cannot be fetched, the app shows the saved run with its original time
Spray planning criteria
These are criteria to help pick time windows, as used by the drone booking system (wind at nozzle height, rain, air dryness). They are not a flight approval and do not replace the chemical label or an on-site check.
Uncertainty
The current sources have no multi-run (ensemble) forecast, so confidence is judged from lead time — the further ahead, the less certain · This is not an accuracy percentage
Technical details
MET Norway Locationforecast 2.0: air_temperature · relative_humidity · wind_speed · wind_from_direction · cloud_area_fraction · precipitation_amount · symbol_code (hourly for about the first 2.5 days, then 6-hour blocks) · Thai Meteorological Department NWP API: tc · rh · rain · ws10m · wd10m · cond (first 48 h) · Map: NOAA GFS 0.25° grid over Thailand–Laos + 1° worldwide, following the 6-hourly model runs