USDA/NASS Disaster Analysis Web Page https://www.nass.usda.gov/Research_and_Science/Disaster-Analysis/index.php Metadata Event: Iowa Derecho - August 2020 Last Updated: August 28, 2020 ------------------------------------------------------------------------- ------------------------------------------------------------------------- File: Derecho_Iowa_082520_WindGust_Polygons.zip Description: This dataset is a 2020 vector layer created to estimate the extent of cropland affected by wind damage from the derecho on August 10, 2020 in Iowa, United States. Data represent estimated peak wind gust polygons over the region for this date. These polygons were derived by NASS from a combination of several wind input datasets listed below. Polygon data were intersected with the 2019 Cropland Data Layer (CDL) and compared with 2019 official NASS estimates. Projection: Albers Conical Equal Area Attribute Table Value WindGust Definition 1 60-79 mph Estimated Wind Gusts 60 mph or higher (includes 80-99 mph and 100+ mph area) 2 80-99 mph Estimated Wind Gusts 80 mph or higher (includes 100+ mph area) 0 100+ mph Estimated Wind Gusts 100 mph or higher ("Intermittent") -------------------- Wind Inputs Estimated Peak Wind Gust Data (data obtained August 25, 2020) derived from the NWS Des Moines and NWS Quad Cities Service areas, and was last updated on August 25, 2020, and subject to change. Obtained From: NOAA National Weather Service Website: https://www.weather.gov/dmx/2020derecho Wind Report Data Obtained From: NOAA Storm Prediction Center Website: https://www.spc.noaa.gov/exper/archive/event.php?date=20200810 -------------------- Agricultural Inputs NASS 2019 Official Estimates (planted acres) Obtained From: Quickstats Website: https://quickstats.nass.usda.gov/ NASS 2019 Cropland Data Layer (planted acres) Obtained From: CropScape Website: https://nassgeodata.gmu.edu/CropScape/ Disclaimer: These data are not official NASS estimates. -------------------- Processing Software Esri ArcGIS 10.3.1 http://www.esri.com/ --------------------