|Webcam image looking across Hood Canal to the west on Sept. 14, 2011. From Dr. Dale Ireland's page.|
However, we haven't seen rain with this onslaught of cloudiness. In fact, Seattle hasn't had any rain for a while. We've been enjoying the usual summer "drought".
|Climatological norms, records, and observed values for temperature and rainfall year-to-date at KSEA.|
That may be about to change, though. Here's the UW-WRF 12-km extended forecast image showing 24-hour accumulated precipitation as of next Sunday evening:
|108-hour UW-WRF 12-km forecast of previous 24-hour accumulated precipitation, valid 00Z, Monday, Sept. 19, 2011.|
The trend in most of the major models has been to slowly increase our precipitation amounts this weekend. Some factors seem to support this. For instance, water vapor imagery shows a nice plume of upper-level tropical moisture headed our way over the next few days.
|GOES-W water vapor imagery at 18Z, Sept. 14, 2011.|
|108-hour UW-WRF 12 km forecast of 300mb winds and heights, valid 00Z, Monday, Sept. 19, 2011.|
|87-hour UW-WRF 12 km forecast of 500mb absolute vorticity and heights, valid 03Z, Sunday, Sept. 18, 2011.|
And the forecast rainfall amounts in the models just keep growing...