Some of the FAA terminal Doppler radar products from a few of the locations will have up to 1 minute updates for the lowest elevation scans. This rapid scan modes, known as “Hazardous Weather Mode” is triggered when a 30dbz echo is detected aloft within 25 miles of the radar site or if there is wind shear detected. The following TDWR radar sites will begin to deliver 1 minute imagery when the radar is in “Hazardous Weather Mode”
TDAL DALLAS LOVE FIELD (DAL)
TDFW DALLAS/FT. WORTH (DFW)
TCLT CHARLOTTE (CLT)
TCMH COLUMBUS OH (CMH)
TCVG COVINGTON (CVG)
TDAY DAYTON (DAY)
TMDW CHICAGO MIDWAY (MDW)
TORD CHICAGO O’HARE (ORD)
TMKE MILWAUKEE (MKE)
TEWR NEWARK (EWR)
TJFK NEW YORK CITY (JFK)
For more information here is the Technical Implementation Notice 12-13
http://www.nws.noaa.gov/os/notification/tin12-13faa_doppler.htm
Here is a link to the Wright-Weather.com Doppler radar sites. The sites in Yellow are TDWR radars.
http://hp3.wright-weather.com/nids.shtml
