Upper Air (sounding) codes:

ALB - Albany, NY
AMA - Amarillo, TX
BIS - Bismarck, ND
BNA - Nashville, TN
CHH - Chatham, MA
CRP - Corpus Christi, TX
DDC - Dodge City, KS
DRT - Del Rio, TX
DTX - Detroit, MI
DVN - Davenport, IA
FFC - Peachtree City (Atlanta), GA
FWD - Dallas/Ft. Worth, TX
GRB - Green Bay, WI
GSO - Greensboro, NC
ILN - Wilmington, OH
ILX - Lincoln, IL
JAN - Jackson, MS
JAX - Jacksonville, FL
LBF - North Platte, NE
LCH - Lake Charles, LA
LZK - Little Rock, AR
MAF - Midland, TX
MFL - Miami, FL
MPX - Minneapolis, MN
OAX - Omaha, NE
OUN - Oklahoma City/Norman, OK
PIT - Pittsburgh, PA
SGF - Springfield, MO
SHV - Shreveport, LA
TOP - Topeka, KS
WAL - Wallops Island, VA