We’re starting to notice  increasing flooding issues in portions of North Texas.  The most recent reports have come out of Johnson County where  over two inches of rain  has fallen in the past few hours. Additional heavy showers and thunderstorms are developing around the D/FW Metroplex. This activity is occurring in a tropically-rich environment. As such, rainfall rates are uncharacteristically heavy  compared to radar representation. Rain drops are small but there are copious amounts of drops. The result is very  heavy rain rates while the radar looks  light. Ground observations are  confirming very heavy rains with lighter radar echoes – thus the heavier radar echoes are undoubtedly producing torrential rains. All activity this  afternoon is being caused by a slow-moving upper level low located across Central Texas. Several weak areas of low pressure have formed in the rain, which is helping to produce excessive rains. Since soils are saturated and creeks are high, it won’t take much additional rain to produce new flash flooding. This is a concern  both north  and south of the D/FW Metroplex. As the heavier rain rotates into D/FW from the north we’ll have to watch for issues in D//FW. Low-lying roads, construction zones, and typical trouble spots could all take on water in a hurry. Johnson County Emergency Management is reporting homes taking on water. Don’t expect issues to stop this afternoon and if anything we’ll see  them become more widespread as  additional rain continues to fall. One final note – with a tropical airmass in place, lightning is actually fairly  uncommon. So if you’re getting  lightning it means extremely heavy rains are in the area.