Questions tagged [rainfall]
The rainfall tag has no usage guidance.
100
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How to convert precipitation rate from kilogram per square meter per second (kg m-2 s-1) to millimeter per hour (mm h-1)?
I need some guidance or clarification regarding the units for precipitation rate or precipitation intensity (esp. for rainfall). I'm used to precipitation intensity being expressed in millimeters per ...
- 21
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1
answer
256
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Why are eastern Oregon and southeastern Washington so dry?
Why are eastern Oregon, southeastern Washington and southern Idaho so arid, as compared to the humid and lush western Oregon and Washington? In Oregon and Washington there is quite an abrupt boundary ...
user29677
3
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0
answers
191
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Investigating the "Leesburg split" rainfall anomaly
I've spent some time in the Leesburg, Virginia (USA) area and I've noticed that whenever a line of thunderstorms approaches the area, it frequently splits and goes around a particular spot just ...
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2
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2
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71
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Is 1 inch of rain in an hour enough to damage growing crops?
An odd discussion came up on a role-playing game forum recently. Some people were speculating about how a mediaeval society would be different if it had wizards, with the spells described in the game ...
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615
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Why is the eastern United States green if the wind moves from west to east?
I was always under the impression that evaporated water from the Atlantic Ocean traveled west to hydrate the eastern U.S. and that not only did the western U.S. have to deal with rain shadows from ...
- 201
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63
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Is good rainfall in the UK the result of being a small island surrounded by large moving seas, having mountains and trapped salt [closed]
If the mountains were levelled and salt removed would the country experience as much rainfall?
Context
Damp in houses:
Salt absorbs moisture: think of plaster walls that grow mould from proximity to a ...
- 113
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0
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18
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compute joint probability of two variables with out using copulas
I have two timeseries one for a daily rainfall and another one for a daily storm surge height. I would like to calculate the probability of a certain rainfall depth with a certain storm surge height. ...
3
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48
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Where does the water in the Euphrates and Tigras rivers come from?
The research I've done says that the rivers are fed by alpine snow, lakes and rains in the Taurus mountains but I'm specifically interested in whether the rains/snows and the water that feeds the ...
- 31
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43
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Map showing the change in precipitation intensity
Hi I need a map for the North American region that shows the change in rainfall intensity. Unfortunately, I can only find maps like this map
Unfortunately, these are not detailed to use.
- 1,906
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13
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Empirical adjustment factors for generating sub-daily precipitation values (for IDF curves)
I am trying to generate an Intensity-Duration-Frequency (IDF) curve using 6-hourly precipitation data. These curves are used to estimate the return period for a rain event with a specific intensity (...
- 21
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111
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Would the Climate change in Southern Africa by Filling Lake Makgadikgadi Evaporation Pans with water from the Zambezi and Chobe Rivers?
I have Macro question, and have enquired and discussed this topic with numerous people. My background is more in Economics and Finance, and read a very interesting article if I am not mistaken 10-15 ...
- 13
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58
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Where can I live if I like long periods of consistent rain?
Let me elaborate on what I mean by "long periods of consistent rain".
I currently live in London and contrary to popular belief, it's not rainy. When it rains, it's usually only for 20 ...
- 151
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677
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Calculating total daily rainfall from a tipping bucket rain gauge
I am trying to calculate total daily rainfall based on data from a tipping bucket rain gauge which is calibrated to a tip of 0.2mm. I have data giving the exact time that a tip is recorded and have ...
- 13
4
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1
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62
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Easiest way to visualize precipitation drainage using raster elevation files in R?
As a non-specialist, enviro-enthusiast, I am curious about visualizing post-precipitation run-off in my local area. I have been able to access and download appropriate elevatio rasters for my local ...
5
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81
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How common are volcanic-induced rain events?
Last year I did an online summer course on remote sensing of volcanoes held by the University of Hawaii at Hilo. During the course, we had a presentation about the monitoring campaign during the 2018 ...
- 153
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164
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Does global warming inhibit transport of moisture?
This northern summer, 2021, there were wildfires in Southern Europe and floods in Germany nearly at same time, also, floods and wildfires in different parts of Turkey, and floods in Far East of Russia ...
- 199
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81
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Why is equatorial Africa wetter in the west than the east? [duplicate]
Looking at equatorial Africa in Google Maps, the western part – Guinea, the Congo – is the dark green of tropical rain forest that I would expect of a wet equatorial region, by analogy with the Amazon ...
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834
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Are terms like "Extremely Torrential Rain" (>500 mm/24 hours) universal in meteorology?
Meteorological phenomenon can span large ranges in size and strength and categorizations exist based on thresholds, One example is the Saffir–Simpson hurricane wind scale (SSHWS) (see also NOAA)
...
- 7,074
17
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8
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5k
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Ways to make a "How hard is it raining?" detector for personal use?
Is there a consensus on the "heaviness" of rain? and Relationship between Probability of Precipitation and Predicted Amount of Rain remind me of a gedankenexperiment of mine. I like to ...
- 7,074
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1
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415
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Relationship between Probability of Precipitation and Predicted Amount of Rain [duplicate]
If a popular website provides an hourly forecast, and it states at 12:00pm there will be a 20% chance of precipitation and 2.5 mm of rain...
What does the "2.5 mm of rain" mean?
(A) ... If ...
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279
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Is there a consensus on the "heaviness" of rain?
As part of the home dashboard I am developing, I get information about incoming rain. It is given in mm/min.
Is there a consensus on the precipitation rate that is called "light rain", or &...
- 279
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3
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331
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Why are rain weather predictions (apparently) so unreliable still in the year 2021?
A year or so ago, I finally implemented a little mechanism which, every five minutes, fetches weather data from SMHI (Swedish official organization, having kept track of temperatures and stuff since ...
- 51
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147
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Find optimum number and location of rain gauges
Is there any recommended method for finding the optimum number and location of rain gauges over a region based on the data from existing rain gauges. There is one Isohyetal method that does not give ...
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45
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How to calculate change in volume of a container using rainfall data
I have 2 data. A container data, 3 containers(A1,A2 and A3) all are the same height, but each have varying water volume, the table consist of change of water volume (hourly) for the weeks 1 and 2.
.. ...
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78
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How to define high frequency rainfall?
I have a rainfall data set from a weather station where the data was collected at 20 minutes intervals for 10 years. I would like to peak up the high frequency rainfall cases.
What are such rainfalls? ...
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1k
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Calculating Stream Flow from Rainfall Data
I have been given the following data:
Month
N
T (degrees C)
Monthly Rainfall (mm)
1
0.68
1.12
391.1
2
0.82
1.40
163.1
3
0.98
3.04
296.5
4
1.15
4.77
157.7
The list goes on.
From this and using ...
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1
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2
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106
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Relationship between rainwater and solar radiation
I am an enthusiast in this area and reading some scientific articles on precipitation forecasting and solar irradiation, I was wondering if these two variables have any direct correlation or ...
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162
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Free historical weather data API
Where can I find a free Python API that provides historical weather data (temperature, rainfall)? I'd need data of an Italian city, at least with hourly granularity.
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399
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Tipping bucket rain gauge measurement, normalizing
I have bought this cheap rain gauge (only the rain gauge, not the other parts) for measuring rainfall with a Raspberry Pi. It works as far as I can tell, every bucket swing will result in an interrupt ...
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342
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Can they still not predict rain even one week in advance?
Every ten minutes, I make an API call to the SMHI's API with the GPS coordinates less than 1 km from here (which cannot possibly matter for accuracy, but does for privacy). SMHI is the Swedish weather ...
1
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1
answer
2k
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Rainfall units conversion from depth to rate/intensity
Given 6-hour rainfal data with units in meters(m), how can one convert the 6-hourly rainfall depth in meters(m) to ...
- 113
3
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1
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577
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Are weather changes periodic? (Do the same weather patterns repeat over years?) (Cycles) (Journal paper suggestion)
I am wondering if there is long term (10 year, 7 year, 20 year) periodic patterns Similar to short term seasonal and periodic patterns in weather such as sea/land wind, monsoon, ENSO, ocean sea-saw, ...
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47
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Is there an index that evaluate how even temporal rainfall distribution is?
Like some biodiversity indices that account for species evenness (whether it is dominated by a few species), I am wondering do meteorologists use an index to describe how even a temporal rainfall ...
- 704
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36
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How to choose "relevant" precipitation durations for flash flood modelling?
For my thesis, I model flash floods in urban areas. A book with recommended practices says to use events with a recurrence interval of 30 and 50 years. Regarding the duration of the precipitation ...
- 341
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53
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Rainfall guage stations outside the watershed
How can I determine the rainfall depth for an event over the watershed, if I just have two stations, S1 and S2, that are outside the catchment?
Methods I have thought of were to take the average of ...
1
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0
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73
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Short-term forecast of Europe by using synoptic charts
I should make a short-term forecast of Europe by using synoptic charts. I'm finding it really hard so I'd be glad if you help me.
'В' means high atmospheric pressure
I'm trying to figure out the ...
- 111
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2
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436
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Deserts and Humidity
How is that a general rule of thumb that less humidity equals more rain? Deserts don’t get much rain and humidity is also very low. Rainforests get a lot of rain when the humidity is very high so how ...
- 411
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1
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Humidity and Rainfall
Usually the higher the humidity the more rainfall we get like in the summer here in Asheville, North Carolina we get a lot of showers and thunderstorms in the summer from the high humidity but I saw ...
- 411
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3
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212
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How to recharge ground water directly from river water
I am not sure if I am asking it on a correct platform or not.
A rainy river passes through my village. We suffer both in summer and in rainy seasons due to this. Could anyone explain how to recharge ...
The PowerHouse
2
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1
answer
47
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Discrete distribution of daily rainfall [closed]
How can I estimate the rainfall rate every ten minutes during a day having the total amount of rainfall during that day ?
- 21
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2
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1k
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Is there a way to approximate the density of air during rain?
Given a rate of precipitation (in mm3/hour), and average droplet diameter, is is it possible to calculate (or even ballpark) the density of the air+rain droplets at time of rainfall?
What I mean is, ...
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7
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Using salinity to predict rainfall
Recently, a new method has been proposed by Ray Schmitt (WHOI) and collaborators to use salinity patterns in the ocean to predict weather events (more specifically, rainfall) at scales from weeks to ...
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Roughly what proportion of a cloud does 'rain out'?
What proportion of the water in a cloud will 'rain out'?
Or, comparing the cloud before and after it has rained, what proportion of the water is left afterwards?
I really have no idea so am just ...
- 151
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65
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Do daily operations (max, min etc) on climate model data reference different periods because of UTC?
If I calculate daily accumulated precipitation or daily maximum temperature from global climate data, will I be getting statistics over different local times, because the operation uses the climate ...
- 31
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1
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65
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Artefacts in PERSIANN-CCS data
I downloaded PERSIANN-CCS for the region of Pawlowdar, Kazakhstan and this has stripes all over my downloaded data.
For another AOI in Kazakhstan I do not have this problem.
Does anyone of you have ...
- 101
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1
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1k
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Why is there no desert in Southeast China?
Arabia, Sahara and Southeast China and India all are on the tropic of Cancer yet Southeast China and India are not deserts. I know that India is not a desert because of monsoon wind which causes heavy ...
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2
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3k
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Why do rivers sometimes travel down the opposite side of the mountains from where the rain happens?
My teacher explained that when wind coming from the ocean gets blocked by a mountain it makes rain on one side of the mountain, like in the image below. This rain leads to the creation of rivers.
(...
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What does a mm of rain mean?
Lots of people have explained it over many sites but I still can not confidently say that I know what it means when they say Hong Kong experienced 3mm of rainfall last Friday.
Does it mean that 3mm ...
- 491
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63
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Estimating Average Rainfall
In a question related to my previous one. I am in the process of building a fantasy world. I have the landmasses with elevation worked out along with the air/wind directions at the various latitudes ...
- 71
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monthly temperatue by state
I am trying to find out monthly average temperature and average rainfall for states of USA from 2015 to 2017. To my surprise I am not able to find it anywhere. Please help.
I could find this link - ...
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