Which is true concerning the radar weather report (SD) for KOKC?

KOKC 1934 LN 8TRW++/+ 86/40 164/60 199/115 15W L2425 MT 570 AT 159/65 2 INCH HAIL RPRTD THIS CELL

Terminal Aerodrome Forecasts (TAF) are issued how many times a day and cover what period of time?