Heavy rains are falling in two areas... one over central and eastern SD... and the other over the SE states. The Deep south saw widespread heavy rains and eastern WY eastern MT western ND western SD and western NEB saw moderate rains. The SHORT TERM forecast is unchanged. In the MEDIUM RANGE forecast t models show front sweeping through the ECB and East Coast but now develop a wave of Low pressure on the front over MO that bring moderate to heavy rains on the 9th into early on the 10th over the ECB. Meanwhile the massive cold High drops out of NW Canada. The 6-10 day still shows the major cold air outbreak for Mid Oct is on track. Upper Teens are possible over MT and ND on the morning of the 9th 10th and 11th... with M and U 20s covering the rest of the Upper Plains into eastern COL NEB MN and northwest IA. And these forecast temps could drop even further as the models begin to see the actual cold air in greater detail.
By the morning of the 13th the High will be over MO and southern ILL Heading for the VA coast. I do NOT see the frost getting into the Lower Plains at this time and the 0z Monday GFS has backed away from that idea as well. Of course with all this High pressure covering the central and eastern CONUS the period from OCT 9-10 TO OCT 15 looks DRY.
In the 1-15 DAY The cold pattern rapidly falls apart as the powerful Pacific Jet stream blasts the Big west Canada ridge apart and floods the western... then central and eventually eastern CONUS with Mild air by OCT 15.