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= Precipitation measurement and Cumulus = | = Precipitation measurement and Cumulus = | ||
Cumulus processes rainfall in one of two [[cumulus.ini| units]] (millimetres and inches). Most processing by Cumulus is based on the total rainfall count output by a weather station, see [[FAQ#My_station_invented_some_rain_that_didn.27t_really_occur.2C_and_I_want_to_set_it_to_zero_.28or_some_other_figure.29 | FAQ]] for more. The rainfall observations output by different weather stations varies, see [[ | |||
Cumulus processes rainfall in one of two [[cumulus.ini| units]] (millimetres and inches). | |||
Most processing by Cumulus is based on the total rainfall count output by a weather station, see [[FAQ#My_station_invented_some_rain_that_didn.27t_really_occur.2C_and_I_want_to_set_it_to_zero_.28or_some_other_figure.29 | FAQ]] for more. | |||
The rainfall observations output by different weather stations varies, see [[Standard_log_files]] for the parameters that Cumulus tracks. Cumulus can also read rainfall from a separate RG11 optical gauge. | |||
== Rain day == | == Rain day == | ||
The threshold value which the daily rainfall has to equal or exceed for the day to be considered a 'rain day' is set in [[Cumulus.ini#Section:_Station | RainDayThreshold]] and has a default value of ''-1'' that means 0.2mm or 0.01in. Alternative thresholds can be used by specifying a number in the units your configuration uses. | The threshold value which the daily rainfall has to equal or exceed for the day to be considered a 'rain day' is set in [[Cumulus.ini#Section:_Station | RainDayThreshold]] and has a default value of ''-1'' that means 0.2mm or 0.01in. Alternative thresholds can be used by specifying a number in the units your configuration uses. | ||
== Cumulus View Menu == | == Cumulus View Menu == | ||
Cumulus 1 provides a number of ways to view derived rainfall. | |||
=== Highs and Lows === | === Highs and Lows === | ||
On the Cumulus '''View''' ''Highs and lows'' screens you can see those of the following appropriate to the chosen period: | On the Cumulus '''View''' ''Highs and lows'' screens you can see those of the following appropriate to the chosen period: | ||
* Highest Hourly/Daily/Monthly Rainfall | * Highest Hourly/Daily/Monthly Rainfall | ||
* High | * High [[#Rain_Rate|rainfall rate]] | ||
* Longest wet period (count of consecutive days with rainfall above configured threshold) | * Longest wet period (count of consecutive days with rainfall above configured threshold) | ||
* Longest dry period (count of consecutive days with rainfall below configured threshold) | * Longest dry period (count of consecutive days with rainfall below configured threshold) | ||
All of these values are also available from [[Webtags]]. | |||
=== ''This month/period/year'' screens === | === ''This month/period/year'' screens === | ||
A number of values are shown for rainfall, these are calculated by summing field 14 (total rain today) from relevant rows in [[dayfile.txt]] (so will exclude the current meteorological day): | A number of values are shown for rainfall, these are calculated by summing field 14 (total rain today) from relevant rows in [[dayfile.txt]] (so will exclude the current meteorological day): | ||
# Total rainfall | # Total rainfall | ||
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==[[Webtags]] report == | ==[[Webtags]] report == | ||
* For current, | |||
* Annual rainfall web tag reports total for ''rainfall season'' year i.e. starting month set on Configuration | station screen | Annual rainfall frame; | * For current, last 24 hours, yesterday (<#rfallY>), and this month; | ||
* For today, yesterday, this month, this rainfall season, month-by-month, and all time; hourly | **totals (<#rfall>, <#r24hour>, <#rmonth> all include rainfall so far today) | ||
* Annual rainfall web tag <#ryear> reports total for ''rainfall season'' year i.e. starting month set on Configuration | station screen | Annual rainfall frame; includes rainfall so far today, same figure as shown for 'This year' on main Cumulus screen) | |||
* For today, yesterday, this month, this rainfall season, month-by-month, and all time; | |||
** hourly rainfall highs and timestamp, | |||
** daily rainfall highs and timestamp, | |||
**rain rate high | |||
* Snow depth for current [[Weather_Diary#How_do_I_change_the_time_a_diary_day_begins.2Fends.3F|day]] | * Snow depth for current [[Weather_Diary#How_do_I_change_the_time_a_diary_day_begins.2Fends.3F|day]] | ||
* Longest wet period (count of consecutive days with rainfall above configured threshold) | * Longest wet period (count of consecutive days with rainfall above configured threshold) |
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