The Current Temperature map shows the current temperatures color ... Many engineering fields in the U.S., especially high-tech ones, also use the kelvin and degrees Celsius scales.

Additionally, the USDA has created a free, easy-to-use interactive verison ... the USDA hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle.

These cold temperatures will spread to the East Coast on Monday, according to the NWS. Overall, about 300 million Americans are expected to be impacted by the vortex. A map shared by Jeff ...

A map from the NWS Weather Prediction Center shows the states expecting subzero wind chills. Cold air will arrive Friday and impact the U.S. through much of next week. A map from the NWS Weather ...