Here's this month's update on the status of the North American "Coming Soon" superchargers as updated by Tesla in April. Eight new superchargers opened in North America in the last month, with about 7 more already built but awaiting transformer / power connection / testing. About 10 should be opening this month.

Location Site Known? Status
San Diego, CA
yes operational
Bishop, CA no unknown
Mountain View, CA
yes operational
Pendleton, OR
yes
operational
Baker City, OR
yes operational
Boise, ID yes under construction
Sheridan, WY yes awaiting power on / testing
Albuquerque, NM yes awaiting power on / testing
Tucumcari, NM
yes operational
Amarillo, TX yes in permitting
Oklahoma City, OK yes under construction
Perry, OK
yes operational
Denton, TX yes in permitting
Houston, TX yes under construction
Plantation, FL yes permitting complete
Nashville, TN yes awaiting power on / testing
Knoxville, TN
yes
operational
Cincinnati, OH
yes operational
Ann Arbor, MI yes waiting for transformer
Grand Rapids, MI
yes operational
Norfolk, VA yes in permitting
Joyce Kilmer Service Area, NJ
yes operational
Molly Pitcher Service Area, NJ yes awaiting transformer
Ocean Township area, NJ no unknown
Newburgh, NY
yes operational
Clarence (Buffalo), NY
yes operational
Seabrook, NH yes in permitting
West Lebanon, NH yes awaiting power on / testing
Following are additional sites not on the Coming Soon list:
Crescent City, CA yes in permitting
Dublin, CA yes in permitting
Napa, CA yes construction imminent
San Mateo, CA yes awaiting power on / testing
Seaside, CA yes in permitting
Las Vegas, NM yes in permitting
Trinidad, CO yes in permitting
Price, UT yes in permitting
Gillette, WY yes in permitting?
Duluth, MN yes under construction
Sheboygan, WI yes in permitting
Strasburg, VA yes in permitting
Dedham, MA yes under construction
Rivière-du-Loup, QC yes in permitting