Area forecast discussion National Weather Service Tulsa OK 617 am CDT Wednesday Jun 19 2013 Aviation... concerning taf sites ktul/krvs/kbvo/kmlc/kxna/kfyv/kfsm. VFR conditions are expected through the forecast period. Thunderstorm chances appear too low to mention at NE OK taf sites at this time. && Previous discussion... /issued 303 am CDT Wednesday Jun 19 2013/ Discussion... a ridge of high pressure aloft will begin to nudge into the area from the southwest today. Before we get into something of a dry period...the area will have to contend with a couple of thunderstorm complexes. This morning there is thunderstorm complex that extends from southwest Kansas into the Texas Panhandle. The latest hrrr shows this complex moving into central Oklahoma this morning as it decays. Have left probability of precipitation out of the forecast for today but not feeling overly confident about this decision. Could see some redevelopment on the outflow boundary created by this complex this afternoon. Another thunderstorm complex is expected to develop across western Kansas again this afternoon/evening and make a run at northeast Oklahoma and northwest Arkansas late tonight into Thursday. Do have probability of precipitation in the forecast to account for this feature as the models have been consistently showing this for several runs. The upper level ridge will continue to build over the area through the weekend. There are some signs that there may be enough weakness in the ridge that some isolated thunderstorms will be possible Saturday and Sunday afternoons in the favored terrain areas of southeast Oklahoma into northwest Arkansas. && Tsa watches/warnings/advisories... OK...none. Arkansas...none. && $$ Aviation...12