FD70 uses the following limits in precipitation type reporting.
| Description | Default | Unit |
|---|---|---|
|
Uses visibility for intensity classification of snow precipitation type codes (OFF = intensity; available later) |
ON = visibility |
− |
| Intensity limit for moderate drizzle | 0.1 | mm/h |
| Intensity limit for heavy drizzle | 0.5 | mm/h |
| Intensity limit for moderate freezing drizzle | 0.1 | mm/h |
| Intensity limit for heavy freezing drizzle | 0.5 | mm/h |
| Intensity limit for moderate rain | 2.5 | mm/h |
| Intensity limit for heavy rain | 10.0 | mm/h |
| Intensity limit for violent rain | 50.0 | mm/h |
| Intensity limit for moderate freezing rain | 2.5 | mm/h |
| Intensity limit for heavy freezing rain | 10.0 | mm/h |
| Intensity limit for moderate drizzle and rain | 0.1 | mm/h |
| Intensity limit for moderate rain and snow | 1.0 | mm/h |
| Intensity limit for moderate snow | 1.0 | mm/h |
| Intensity limit for heavy snow | 5.0 | mm/h |
| Visibility limit for moderate snow | 1000 | m |
| Visibility limit for heavy snow | 400 | m |
| Intensity limit for moderate ice pellets | 1.0 | mm/h |
| Intensity limit for heavy ice pellets | 5.0 | mm/h |
| Minimum intensity reported | 0.01 | mm/h |
| Visibility limit for reporting mist in SYNOP | 10000 | m |
| Visibility limit for reporting mist in METAR | 5000 | m |