National Weather Service United States Department of Commerce

Severe Thunderstorms Tonight in the Mid-Atlantic; Tropical Storm Bertha in the Gulf

Scattered thunderstorms with severe gusts, hail and a tornado risk are possible near a cold front from the Ohio Valley to the Mid-Atlantic tonight. Tropical Storm Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the panhandle of Florida into Louisiana through Wednesday. Read More >

National Weather Service Dissemination

National Program

NWR Coverage Maps

Weather.gov > National Weather Service Dissemination > NWR Coverage Maps

Click on a state to view coverage.

Coverage is affected by many factors.
Read the Coverage Map Notes below to understand these factors on the state and individual maps.
Map of USA

Link to Alabama Map Link to American Somoa Map Link to Washington Map Link to Idaho Map Link to Oregon Map Link to California Map Link to Nevada Map Link to Arizona Map Link to New Mexico Map link to Utah Map link to Colorado Map Link to Wyoming Map Link to Montana Map Link to Marianas Map Link to Guam Map Link to Hawaii Map Link to Puerto Rico MapLink to Virgin Islands Map Link to Texas Map Link to Oregon Map Link to Kansas Map Link to Nebraska Map Link to South Dakota Map Link to North Dakota Map Link to Minnesota Map Link to Iowa Map Link to Missouri Map Link to Arkansas Map Link to Louisiana Map link to Delaware Map Link to New Jersey Map Link to Wisconsin Map Link to Illinois Map Link to Mississippi Map Link to Tennessee Map Link to Kentucky Map Link to Indiana Map Link to Michigan Map Link to Ohio Map Link to Georgia Map Link to South Carolina Map Link to North Carolona Map Link to Virginia Map Link to West Virginia Map Link to Maryland Map Link to Delaware Map Link to Pennsylvania Map Link to New Jersey Map Link to New York Link to New York Link to Vermont Link to New Hampshire Link to Connecticut Link to Massachusetts Link to Rhode Island Link to Rhode Island Link to Maine Link to Alaska North Central Link to Alaska Link to Alaska South Central Link to Alaska South East Link to District of Columbia Link to Florida 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.
    • Signal level of greater than 18dBuV: Reliable coverage