A slow-moving trough has been generating thunderstorms over much of northern, central and southern NSW, and the east will get its share during Friday afternoon. Heavy showers, mostly associated with thunderstorms, have brought some very good rain totals to many parts of NSW, on and west of the divide. Cabramurra, Wagga Wagga and Corowa all had their biggest rain in nine months, with Wagga Wagga's 26mm being over half its monthly average for September. Gundagai and Cootamundra had their wettest 24 hours in eight months, Bathurst in six months, Parkes in four months, whilst Walgett, parts of the Hunter Valley and some western Sydney suburbs collected their best days rain in 2-3 months. The clouds have not completed their work just yet, with showers and thunderstorms, some likely to be severe, set to continue during Friday afternoon. Parts of the North West Slopes and Plains, Northern and Central Tablelands, Hunter Valley, Greater Sydney and the Illawarra should see some healthy rainfall totals by midnight Friday, with pockets likely to see well over 30mm. Thunderstorms are a high risk for many areas, and severe storms could be triggered anywhere from the North West Slopes to the South West Slopes, and areas east to the coast, including the Sydney Basin. Damaging winds, heavy rainfall and large hail are all risks with the types of storms brewing on Friday. The worst of the storms should fizzle out by around mid-evening Friday, with some lingering showers hanging around overnight and into Saturday morning. Should severe storms affect your area, stay up to date with warnings at http://www.weatherzone.com.au/warnings.jsp