Download and process the Montana SNOTEL site inventory from the NRCS National Water and Climate Center

Download and process the Montana SNOTEL site inventory from the NRCS National Water and Climate Center

mco_get_snotel_data(
  stations = c("1040:CO:SNTL", "619:OR:SNTL", "1048:NM:SNTL"),
  variables = c("stationId", "WTEQ::value"),
  start_date = "POR_BEGIN",
  end_date = "POR_END"
)

Arguments

stations

A character vector of station identifiers in trinomial format (e.g., '1040:CO:SNTL').
variables

A character vector of variables to request. Variables and their associated values are in variable/value pairs in the format "VARIABLE::value" (for example, "WTEQ::normal_1981" will give the 1981--2010 normal value for Snow Water Equivalent). Possible variables include:

  • TAVG --- Daily average air temperature (ºF)

  • TMAX --- Daily maximum air temperature (ºF)

  • TMIN --- Daily minimum air temperature (ºF)

  • TOBS --- Instantaneously observed air temperature at start of day (ºF)

  • BATT --- Battery voltage at start of day (volts)

  • BATX --- Daily maximum battery voltage (volts)

  • PREC --- Water year accumulated precipitation at start of day (inches)

  • PRCP --- Daily total precipitation (inches)

  • PRCPSA --- Daily total precipitation, snow-adjusted (inches)

  • SNWD --- Total snow depth at start of day (inches)

  • WTEQ --- Snow water equivalent at start of day (inches)

  • WTEQX --- Daily maximum snow water equivalent (inches)

  • SNDN --- Snow density at start of day (percent)

  • SNRR --- Daily snow rain ratio (unitless)

Not all values are available for all variables. Possible values include:

  • value --- The measured value

  • qcFlag --- Quality control flag

  • qaFlag --- Quality assurance flag

  • prevValue --- Previous year's value

  • delta --- Delta, change from previous year's value

  • collectionDate --- Collection date

  • normal_1981 --- Normal (1981-2010)

  • pctOfNormal_1981 --- % of normal (1981-2010)

  • average_1981 --- Average (1981-2010)

  • pctOfAverage_1981 --- % of average (1981-2010)

  • median_1981 --- Median (1981-2010)

  • pctOfMedian_1981 --- % of median (1981-2010)

  • normal_1971 --- Normal (1971-2000)

  • pctOfNormal_1971 --- % of normal (1971-2000)
start_date

A Date object as the start date. Defaults to period of record.
end_date

A Date object as the end date. Defaults to period of record.

Value

A data frame containing the requested variables.

Examples

if (FALSE) {
mco_get_snotel_data()
}