We're still on track for a major rain event. The 4 km (36-72) hour forecast shows rain continuing on Monday, with especially heavy amounts near Ashekelon, Mitzpe Ramon, and the Dead Sea Basin. Totals may be greater than 50 mm from the area of Jerusalem south to Beer-Sheva, including within the Dead Sea Basin itself. Heavy rain is also forecast in the Arava, as well as the mountains east of Eilat.
While I can't provide specific details about river flow, this does seem to be potentially very dangerous situation, which should evolve from early afternoon until evening from the eastern Sinai/western Arava through the center and into the Dead Sea area by mid to late afternoon, and then continue through the night, affecting all parts of the country.