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<\/a><\/p>\nWe are always interested in putting numbers<\/a> into perspective<\/a>, so we were interested in this article in which they put the Hurricane Harvey’s rain into perspective<\/a>.<\/p>\n They’re predicting 30-40 inches of rain in a few days in Texas. They asked an expert to put that into perspective and he said:<\/p>\n Let\u2019s put it in context. Much of the Northeast Corridor \u2014 Washington to New York and Boston \u2014 maybe receives maybe between 40 and 45 inches of rain a year. Think of all the rain you get in July through Christmas and put that in a couple days. It\u2019s a lot of rain.<\/p><\/blockquote>\n It’s easy for us to think in terms of New York City, so we looked up some weather data<\/a>. See the table at the top of this post (all figures are in inches).<\/p>\n First thing we can notice is that the expert understated things, for New York at least. Thirty five inches would be equivalent to all the rain in NYC from April<\/strong> (not July) to December, inclusive. <\/p>\n But we agree that it’s a lot of rain.<\/p>\n We’ve always had trouble putting rain forecasts into perspective, so here are some rules of thumb we figured out from the data that we’re going to memorize. If you live in the corridor from DC to Boston, you may find these useful.<\/p>\n Here’s R-markdown<\/a> code if you want to play around:<\/p>\n\n