NWS Nashville: "A sprawling 600+ decameter high pressure system centered over Missouri will result in heat headlines through the week from the Gulf Coast to the Upper Ms Valley." #TNwx #heatwave #heat https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=AFDOHX&e=202308212328
IEM :: AFD from NWS OHX

AFD issued by NWS OHX at 21 Aug 2023 23:28 UTC

@ai6yr for those not familiar with the metric system, 600 decameters is about 30 furlongs.