Gradient is increasing rapidly this evening with gusts to around 40 mph already at Troutdale and Corbett. I noticed the 12z WRF-GFS showed about 6 millibars at 10pm and that’s about where we are. Colder and drier air is coming south down the east slopes of the Cascades and Central Basin of Washington too. The main issue this evening for the Gorge is whether there is even any moisture left for freezing rain or snow by 4am or so. I notice our model and WRF-GFS dry out quickly after daybreak, so this may just be an event where we see very light amounts of snow and freezing rain out there and it really doesn’t turn into a big deal.
I see the NWS evening discussion mentioned the possibility of freezing rain even to the Metro area Thursday night or Friday. It’s definitely something to watch, but I’m not to excited about it since we don’t get a nice period of cold/clear nights to cool the valleys down.
Next week is looking a bit wetter, but not much cooler in the mountains. I see Timberline has seen well over 3″ of rainfall in the last 30 hours or so. We haven’t seen such a dump of rain at that elevation in midwinter for 2 winters!
Chief Meteorologist Mark Nelsen