General Drought Information
Current Weather and Satellite Imagery
Average Temperature Departure from Normal
Updated daily. Departure of average temperature from the 1981-2010
NCDC normal for the given time period.
Precipitation Percent of Normal
Updated daily. Percent of the 1981-2010 NCDC normal percipitation
value at each station for the given time period.
NWS Observations, Normals, and Records for Current Water Year
Updated daily. Station-based climate information for various
locations in the Great Basin. Extreme high and low temperature records
for a day of the year are indicated by the blue and red bars. The normal
range is shown in green. For precipitation, normal annual accumulations
are shown in light green. Actual water year-to-date precipitation is
shown in mint green. The deficit between the two is shown in brown.
Standardized Precipitation Index (SPI)
Updated daily. Standardized Precipitation Index (SPI) is a
probability index that considers only precipitation. The SPI is an index
based on the probability of recording a given amount of precipitation,
and the probabilities are standardized so that an index of zero indicates
the median precipitation amount (half of the historical precipitation
amounts are below the median, and half are above the median). The index
is negative for drought, and positive for wet conditions.
Snotel Basin Snowpack Summary Time Series
Updated daily. Time series of snow water equivalent in inches for
current water year, the past three water years, and the median of water
years 1981-2010. Updated daily, and based on provisional SNOTEL data.
NRCS Snotel Basin Graphics
Other Hydrologic Information