NCEP/NCAR Reanalysis Data, Water vapor

Dataset Availability
1948-01-01T00:00:00 - 2021-03-02T00:00:00
Dataset Provider
Earth Engine Snippet
atmosphere reanalysis climate geophysical precipitable vapor ncep noaa


The NCEP/NCAR Reanalysis Project is a joint project between the National Centers for Environmental Prediction (NCEP, formerly "NMC") and the National Center for Atmospheric Research (NCAR). The goal of this joint effort is to produce new atmospheric analyses using historical data as well as to produce analyses of the current atmospheric state (Climate Data Assimilation System, CDAS). The NCEP/NCAR Reanalysis 1 project is using a state-of-the-art analysis/forecast system to perform data assimilation using past data from 1948 to the present. The data have 6-hour temporal resolution (0000, 0600, 1200, and 1800 UTC) and 2.5 degree spatial resolution.


2.5 arc degrees


Name Units Min Max Description
pr_wtr kg/m^2 -8.2* 89.8*

Total column water vapor

* estimated min or max value

Terms of Use

Terms of Use

There are no restrictions on the use of these datasets.


Explore in Earth Engine

var dataset = ee.ImageCollection('NCEP_RE/surface_wv')
                  .filter('2018-08-01', '2018-08-15'));
var totalColumnWaterVapor ='pr_wtr');
var totalColumnWaterVaporVis = {
  min: 0.0,
  max: 60.0,
  palette: ['0000ff', '00ffff', '008000', 'ffff00', 'ff0000'],
Map.setCenter(-158.2, 2.81, 2);
    totalColumnWaterVapor, totalColumnWaterVaporVis,
    'Total Column Water Vapor');