A broad low pressure trough has triggered thunderstorms and record rainfall in Darwin and surrounding suburbs overnight and into this morning. Darwin received 104.8mm to 9am, the heaviest 24 hour November rain since records began in 1941 and close to the monthly average. It was also the heaviest daily total since March last year. These falls were very heavy at times, with 21.2mm falling in only ten minutes early this morning. The surrounding areas of Middle Point and Dum In Mirrie gained 74.6mm and 51.2mm respectively. Middle Point's total was its heaviest November rain since 2006, when 112.4mm fell. For both locations, this was the heaviest rain since the start of the year. Adding to the heavy rainfall overnight was the light show. Almost 4000 lightning strikes have been recorded within 100km of Darwin since Monday afternoon. Showers and thunderstorms remain a risk each day this week as the low pressure trough lingers in the region. However, showers are not expected to be quite as heavy as last night's deluge.