Emergency Managers Weather Information Network

Click for FAQ (Frequently Asked Questions)

The Emergency Managers Weather Information Network (EMWIN) is a service of the National Weather Service and the Federal Emergency Management Agency (FEMA). It began operation in Washington DC in 1994, with the mission of providing timely severe weather information to Emergency Managers. It has grown to be a significant tool for Emergency Managers in severe weather events across the United States. 

Detailed EMWIN network information is available at http://iwin.nws.noaa.gov/emwin/index.htm.

EMWIN Radio Coverage Map for North Texas. In north central Texas, EMWIN re-broadcast is a cooperative effort of the National Weather Service, the Motorola Amateur Radio Club of North Texas, and other supporting organizations. EWMIN broadcasts operate 24 hours a day, delivering information on severe weather in the area including forecasts, weather watches and warnings, and radar updates.

Four transmitter sites are located throughout the service area of the Fort Worth WFO. All sites transmit data at 1200 bits per second (1200, N, 8, 2). Coverage maps for the various sites are provided to assist in selecting the best transmitter frequency to use based on your location. Click the site names below for estimated coverage information.

Fig.1 Transmitter Coverage For N. Texas 

Site Power Level Data format Frequency

Site Power Level Data Format Frequency
Fort Worth 100 watts 1200,N,8,2 163.3250 MHz
Mesquite 100 watts 1200,N,8,2 168.8125 MHz
Denton 100 watts 1200,N,8,2 168.7125 MHz
Paris 100 watts 1200,N,8,2 168.7125 MHz

Other EMWIN broadcast sites in Northern Texas

Temple 100 watts 9600,N,8,1 163.3250 MHz

Generally, each site can cover up to a 40 mile radius, but beyond 10 miles, an outdoor antenna will be needed.

To use this service, you will need a few components: a receiver, a demodulator, a personal computer running Windows, specialized software and an antenna. The following diagram shows a typical setup.

See the EMWIN link [http://iwin.nws.noaa.gov/emwin/wintip.htm ] for more detailed technical requirements and a list of commercial vendors.

This service has been designed to provide a source of timely severe weather information for storm spotters, Emergency Operations Centers (EOC) and public safety organizations as well as the general public.

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