Severe Weather Expected for the South on Tuesday; Winter Weather Conditions for the West, Central Plains, and Upper Mississippi River Valley
Severe weather is forecast across the middle and lower Mississippi Valley Tuesday afternoon where tornadoes and damaging winds are expected. A strong cold front will track across the Intermountain West accompanied by strong winds, heavy snow and elevated fire weather conditions for portions of the western High Plains with heavy snow likely for Upper Mississippi Valley Tuesday.
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The gridded precipitable water plots (above) were created for the maximum, 99th percentile, 75th percentile, 50th percentile, and +2SD values. A separate GIS point shapefile was created for each of these categories, based on the latitude/longitude values of the sounding locations for each month. The point shapefiles were then interpolated to the gridded raster format using the following specifications:
a) Kriging interpolation method
b) Semivariogram: Circular
c) Number of points: 6
d) Grid resolution: 0.1 degrees
Due to increasing uncertainty in interpolated data at increasing distances from the point data source, caution should be used when taking a value from the precipitable water maps. Because of this, the border of the continentual Unites States was used to clip the completed grids.
The data on these plots has changed since the original plots were produced in 2011. This is due to a change in the interpolation method (to a geostatistical technique) as well as the additional of 3 more years of sounding data.
The data on these plots has changed since the original plots were produced in 2011. This is due to a change in the interpolation method (to a geostatistical technique) as well as the addition of 3 more years of sounding data.