- #It is raining outside 2.0 what does that mean how to#
- #It is raining outside 2.0 what does that mean software#
- #It is raining outside 2.0 what does that mean download#
The last thought to add to this note is the concept of a rain intensity called Violent Rain, which is >2"/hr. To follow up on this we have purchased an even cheaper rain gauge from Timexweather. These instruments would then show a dynamic hourly rate based on fluctuations in the actual rate.
#It is raining outside 2.0 what does that mean software#
In other words, there are some rain gauges alone that cost 500 to 800$, so these would presumably be more accurate in their tips and also have software that actually computes a live hourly rate based on the actual time rate it collects rain. I suspect that a higher quality instrument would do this differently. I still have no idea how accurate that would be.
#It is raining outside 2.0 what does that mean download#
In fact, even with a cheap one like this you can download the data and deduce the rate after about 15 min or so. If you were really-really into this, you could time the clicks yourself and compute the rate before the hour.
So you do not really know what the hourly rate is from the read out alone until it has collected rain for an hour or more. It just counts the clicks and even looking out the window to see this is indeed a steady rain fall, your gauge will show a building rain rate for the first hour. That is, in principle, after the second click 6 min later, it might guess that the actual hourly rate is 0.10"/hr, even though it has only collected two clicks over a 6-min period, but that is not the way this one works. As far as i can tell from the LaCrosse instrument, it is just accumulating the clicks and not computing an hourly rate based on what it knows. The assumption might be that if you did get 10 clicks per hour with the onset of a new steady rain that these would be 10 more or less evenly spaced clicks, namely 60 min/10 clicks, or one click every 6 min or so.īut now we run up against the programming limits of an inexpensive device. Get 10 clicks in an hour and you have 0.10"/hr which is the top of Light Rain or the bottom of Moderate Rain. Get 1 click in an hour (0.01") and you have barely measurable drizzle. It honestly tipped at the right time, to the drop! All crude stuff, but it does show how it works and that it works about right. At the end of the video it looks like I knocked the bucket over with the teaspoon to make my point, but that is not the case. Thus each half teaspoon of collected water should give a tip, as indeed it does. Thus a cylinder of water 0.01" tall on it would include 0.153 inches cubed of water (pi x r^2 x h), which is 2.50 cc, which turns out to be about 0.5 teaspoons. This one has a cone collector with diameter of 4.41 inches (112 mm). As you see below this is a pretty simple device. Violent Rain, the next and last category after Heavy Rain.
The latter (2"/hr) is the defining point for An expensive US model that sells for $500 promises 2% up to 1"/hrĪnd 3% up to 2"/hr.
I have just ordered another one online, looks the same as this one, wireless, for $32 including shipping. Making all of them, so I would guess they have homed in on theĭimensions and engineering pretty well. Inexpensive unit, but it seems that there is some factory in China I am not at all sure what their accuracy is. Was in that category not long ago ) here is a short crude demo of how For those who have not thought of such matters ( I Violent Rain = > 2.0 (This is new a category not mentioned till now in this series, discussed more below))Ĭommonly measured is 0.01" corresponding to one tip of a tippingīucket rain gauge. Light Rain = 0 to 0.10 (There can be distinctions between low level light rain and drizzle) Varies my orders of magnitudes–not factors of 2 or 3, but factors of 10 Logarithmic scale, meaning the range we can detect and be subject to Interesting to note that rain fall rates are often presented on a This probably makes sense from some basic hydrological reasoning. Land, but it clearly shows that their are more rain clouds over the water than over the land. This is not just because there is more ocean than Is Light Rain, meaning below 0.10"/hr, and most of the world's rainįalls into the oceans. Think we see from any of these TRMM images that most rain by area Part 2 gives an example of rain at the border between Light Rain and Moderate Rain.
#It is raining outside 2.0 what does that mean how to#
Recall, I am trying to understand rain rates and how to interpret what we see when it rains. Below is a near-real-time (3-hr) image of rainfall, worldwide, from the TRMM satellite.
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