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Track Hurricane Danny (or any other Unisys-data-available-tropical storm)
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library(leaflet) | |
library(stringi) | |
library(htmltools) | |
library(RColorBrewer) | |
# get tracks | |
danny <- readLines("http://weather.unisys.com/hurricane/atlantic/2015/DANNY/track.dat") | |
# extract data | |
danny_dat <- read.table(textConnection(gsub("TROPICAL ", "TROPICAL_", danny[3:length(danny)])), | |
header=TRUE, stringsAsFactors=FALSE) | |
# make storm type names prettier | |
danny_dat$STAT <- stri_trans_totitle(gsub("_", " ", danny_dat$STAT)) | |
# make column names prettier | |
colnames(danny_dat) <- c("advisory", "lat", "lon", "time", "wind_speed", "pressure", "status") | |
# assign colors | |
danny_dat$color <- as.character(factor(danny_dat$status, | |
levels=c("Tropical Depression", "Tropical Storm", | |
"Hurricane-1", "Hurricane-2", "Hurricane-3", | |
"Hurricane-4", "Hurricane-5"), | |
labels=rev(brewer.pal(7, "YlOrBr")))) | |
# draw the map | |
leaflet() %>% | |
addTiles() %>% | |
addPolylines(data=danny_dat[danny_dat$advisory<=9,], ~lon, ~lat, color=~color) %>% | |
addCircles(data=danny_dat[danny_dat$advisory>9,], ~lon, ~lat, color=~color, fill=~color, radius=25000, | |
popup=~sprintf("<b>Advisory forecast for +%dh (%s)</b><hr noshade size='1'/> | |
Position: %3.2f, %3.2f<br/> | |
Expected strength: <span style='color:%s'><strong>%s</strong></span><br/> | |
Forecast wind: %s (knots)<br/>Forecast pressure: %s", | |
htmlEscape(advisory), htmlEscape(time), htmlEscape(lon), | |
htmlEscape(lat), htmlEscape(color), htmlEscape(status), | |
htmlEscape(wind_speed), htmlEscape(pressure))) %>% html_print |
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