Apparently because of this:
EW6753>APRS,TCPXX*,qAX,CWOP-7:@250135z4511.58N/09316.80W_289/004g007t081r000p010P010h69b10093eCumulusDsVP
EW6753>APRS,TCPXX*,qAX,CWOP-5:!4511.58N/09316.79W_180/005g014t074r000P000p000h73b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-3:!4511.58N/09316.79W_293/001g008t070r000P003p003h90b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-7:!4511.58N/09316.79W_225/004g011t078r000P010p010h75b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-5:!4511.58N/09316.79W_203/003g011t084r000P010p010h65b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-2:!4511.58N/09316.79W_293/002g009t086r000P010p010h68b00304.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-3:!4511.58N/09316.79W_315/003g010t081r000P010p010h69b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-4:!4511.58N/09316.79W_290/002g002t081r000P010p010h69b00305.VWS-DavisVP2
EW6753>APRS,TCPXX*,qAX,CWOP-4:@250150z4511.58N/09316.80W_283/004g006t081r000p010P010h69b10095eCumulusDsVP
Is there some reason why VWS was reporting for some 15 minutes, or so, rather than Cumulus?