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Groundhog Day Storm Snowfall Map

Groundhog Day Storm Snowfall Map. Laura Lenfest. Abstract.

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Groundhog Day Storm Snowfall Map

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  1. Groundhog Day Storm Snowfall Map Laura Lenfest

  2. Abstract The Groundhog Day Storm that took place on February 2-3, 2011 left behind lots of snow. Lyndon State College was closed the night before due to the anticipated magnitude of the storm. Data was acquired from the National Climate Data Center (NCDC) and used to create points on a map. Using the points and interpolation methods, a snowfall map was produced over Maine, New Hampshire, and Vermont. Using NED raster data, this snowfall map was compared to the terrain of the region. With knowledge of a northeasterly wind over the region for the majority of the 2nd, areas of orographic enhancement could be identified. The snowfall map was also compared to a model snowfall map released by the National Operational Hydrologic Remote Sensing Center (HOHRSC) to assess the credibility of the interpolation method and data used. Results showed that there may have been orographic enhancement but not in relation to the northeasterly flow. As well, comparisons to the model snowfall map show similarities in large snowfall regions.

  3. Import Data Into Excel http://www1.ncdc.noaa.gov/pub/data/snowmonitoring/fema/02-2011-dlysnfl.txt

  4. Raw Imported Data

  5. Final Spreadsheet

  6. Arc Catalog Add a new Personal Geodatabase Import a single table into geodatabase 1 2

  7. Creating Feature Classes 2 1 3

  8. Arc Map: Importing Data Red: Raw Data Blue: Filtered Data

  9. Interpolation

  10. Natural Neighbor

  11. Contours

  12. Natural Neighbor With Contours

  13. NED Raster Data NED= “National Elevation Dataset”

  14. Clipping Features

  15. Making a TIN TIN = “Triangulated Irregular Network”

  16. TIN: NED Contours

  17. Overlay Layers: NED TIN

  18. Analysis Northeasterly Flow

  19. Model Snowfall Map from NOHRSC

  20. Comparison

  21. Conclusions and Considerations Conclusions Considerations Some indication of orographic enhancement unrelated to northwesterly flow Snowfall map relates well to the modeled snowfall map from NOHRSC Use of more data could yield a better interpolation Use Google Earth to get a better look at the impact of terrain Note key locations and compare observed amounts to interpolated amount from map

  22. Final Product

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