WSR-57 radars were the USA's main weather surveillance radar for over 35 years.  The National Weather Service operated a network of this model radar across the country, watching for severe weather.
 Under the Joint Electronics Type Designation System (JETDS), all U.S. military radar and tracking systems are assigned a unique identifying alphanumeric designation. The letters “AN” (for Army-Navy) are placed ahead of a three-letter code.
 Thus, the AN/FPS-41 represents the 41th design of an Army-Navy “Fixed, Radar, Search” electronic device.
 The WSR-57 (Weather Surveillance Radar - 1957) was the first 'modern' weather radar. Initially commissioned at the Miami Hurricane Forecast Center, the WSR-57 was installed in other parts of the CONUS (continental United States).  The WSR-57 was the first generation of radars designed expressly for a national warning network.
 The WSR-57 was designed in 1957 by Dewey Soltow using World War II technology.  It gave only coarse reflectivity data and no velocity data, which made it extremely difficult to predict tornadoes.  Weather systems were traced across the radar screen using grease pencils.  Forecasters had to manually turn a crank to adjust the radar's scan elevation, and needed considerable skill to judge the intensity of storms based on green blotches on the radar scope.
 The military designation for the WSR-57 is AN/FPS-41.
 NOAA has pictures of the Charleston, SC, WSR-57 radar image of the 1989 Hurricane Hugo. A WSR-57 dish, located on the roof of the National Hurricane Center (NHC), was blown away by Hurricane Andrew. The NHC report on Hurricane Andrew shows its last radar image, as well as images from nearby WSR-88D radars. As the network of WSR-57 radars aged, some were replaced with WSR-74S models of similar performance but with better reliability.  WSR-57 operators sometimes had to scramble for spare parts no longer manufactured in this country.  128 of the WSR-57 and WSR-74 model radars were spread across the country as the National Weather Service's radar network until the 1990s.  The WSR-57 radars were gradually replaced by the Weather Surveillance Radar - 1988, Doppler, WSR-88D, which NOAA named the NEXRAD network.
 The last WSR-57 radar in the United States was decommissioned on December 2, 1996.
 The 66 former sites of the WSR-57 include the following:
 Moved to Coral Gables in 1967.
 1st
 Destroyed during Hurricane Andrew.
 The dome used to reside downtown on the old Federal Building at 911 Walnut Street
per SPC history
 2nd
Replaced a WSR-1
 Serial model 16
 Replaced a WSR-1
About 16th
 Serial model 19
 Among first 31
 Replaced by a WSR-74S.
 Among first 31
Replaced a WSR-3
 (Covington, KY) at the Greater Cincinnati Airport.
 About 16th
 Among first 31
Replaced a WSR-1
 Among first 31
 Serial model 20
Moved to Ruskin, FL May 1, 1975 to June 1, 1975
 2nd commissioning June 1, 1975
Among first 31
Replaced a WSR-1
 Final decommissioning November 9, 1995
 On top of the Post Office Building
 Among first 31
Replaced a WSR-1
 About 16th
Replaced a WSR-1
 Stephenville, TX (SEP) September 10 to October 28, 1973.
 Among first 31
Replaced a WSR-1
 Among first 31
Replaced a WSR-3
 Among first 31
Replaced a WSR-1
 Research radar; not part of the national operational network. Originally located at NSSL facility on the University of Oklahoma - Norman's North Research Campus near 35.23807,-97.46264 and later relocated to Woodward, OK in the 1980s as an off-network radar operated to support local emergency management and ARES services in an area of poor network radar coverage. Radar tower and antenna remains in place at 36.44133,-99.37137
 Probably not counted among first 31
 a.k.a. Santa Catalina - atop Blackjack Mountain.
 Among first 31
 Station closed
 Among first 31
 Among first 31
 At Washington Dulles International Airport, Dulles, VA.
 Among first 31
 Replaced by a WSR-74S at Patuxent River, MD.
 Among first 31
 Among first 31
 Among first 31
Replaced a WSR-1
 Moved to Marseilles, IL (MMO) June 1, 1972 to April 5, 1973
A WR100-5 was leased during the move to Marseilles, IL
 Second commissioning April 5, 1973
Among first 31
Replaced a WSR-3
 Final decommissioning February 28, 1983
Replaced by a WSR-74S
 Serial model 8
Was located at 38.03565,-87.53854
 Among first 31
 Serial model 2
 Among first 31
Replaced a WSR-1
 Originally on roof of Federal Building in New Orleans
before moving to 1120 Old Spanish Trail in Slidell, LA
 Among first 31
Replaced a WSR-1
 At the airport
 Among first 31
 At Point Six Mountain
 Among first 31
 Among first 31
 At 30 Rockefeller Plaza.
 Among first 31
 Was located at 35.40159,-97.60149
 Among first 31
Replaced a WSR-1
 Transferred to NOAA
December 5, 1969
 Replaced by a WSR-74S in Portland, ME (PWM).
 At Jackson International Airport at Thompson Field.
 Replaced a WSR-3
 Has been torn down to make way for a new airport terminal
 (OHX is the WSR-88D)
At Old Hickory Lake
 Replaced a WSR-3
 (MEG is the WSR-88D)
At the Millington Naval Air Station (NQA).
Moved to Memphis (MEM)
 Operations transferred to NOAA
February 1, 1971
 Replaced by a WSR-74S.
 8 miles southwest of Brent, AL
 2nd commissioning August 10, 1973
 Final decommissioning June 27, 1995
 At what is now 47730 Buxton Back Road
 Replaced a SP-1M
 (PBZ is the WSR-88D)
 Located at 6247 Panhandle Road atop Holston Mountain near Elizabethton
 Replaced a WSR-1
 At 3009 Fairview Road
 66th and final WSR-57
 Located at 3258 Farm Road 1090 south of Monett
 Transfer of operations from the SP-1M at Nantucket, MA