National Weather Service United States Department of Commerce

Ice and Heavy Rain in the Southern States; Upcoming Arctic Blast for Northeast

The epic ice storm across a portion of the Southern U.S. will come to an end on Thursday. A system tracking near the Gulf Coast will clear-out the frozen mess, while also producing heavy rain and perhaps a severe thunderstorm for the Gulf Coast states. Meanwhile, a glancing shot of arctic air will sweep through the Northeastern U.S. on Friday to produce very dangerous wind chills through Saturday. Read More >

NWR Coverage

 

 


USA MAP


 
Coverage Map Notes
The coverage statistics and maps are calculated using a computer model and station data assuming ideal conditions. Coverage may be 5 to 10 percent below the computer predicted coverage for the following reasons:
  • The computer model is sensitive to antenna performance. Antenna performance is a function of local conditions, causing signals to be stronger signal level in some directions than others.
  • Placement of NWR antennas is dictated by the tower owner, which may result in a less than ideal set up.
  • The antenna may be affected by nearby structures or bodies of water.
  • In some special instances, the antenna may have been intentionally adjusted to be "directional" and provide better coverage to a specific area to the detriment of other areas.
  • Because of variations in local site conditions, the performance of an individual transmitter and antenna may be less than predicted or expected.
  • Seasonal environmental conditions, such as icing or heavy rain, affect performance of a transmitter station and its various components, particularly those subject to continuous weather exposure.
  • The coverage maps are shown in a single color format, which relates to an estimated signal level.
    • White: Signal level of greater than 18dBuV: Reliable coverage