Tuesday, Dec. 8th – Lincoln County
Summary: Strong winds and heavy rain pummeled our area again yesterday.
Past 24 Hours High/Low/Gust/Rain/Total…
Lincoln City: 59F/55F/55mph/2.15”/5.48”
Depoe Bay: 58F/54F/49mph/2.16”/4.97”
NOTE: The local Warnings, Watches and Advisories now in effect will again consume the bulk of today’s report. Those traveling away from the Central Coast can expect heavy rain, flooded roads in spots and windy conditions throughout all of Northwest Oregon with snow levels above the Cascade passes.
A High Wind Warning remains in effect for the Central Coast until 4:00am Wednesday. South winds 25-40 mph gusting 50-60 in coastal communities. Beaches and headlands will likely see stronger winds, 35-45 mph gusting 60-70 mph. The strongest winds will be during two periods, one from 10:00am to 5:00pm today, with another period later this evening into early tomorrow morning. These strong winds may make travel difficult for high profile vehicles, especially along Highway 101. Isolated power disruptions will be possible, along with localized blockage of roads due to damaged trees.
A Flood Warning remains in effect for the Siletz River at Siletz; this river will continue to subside early this morning before rising again late today. It is expected to rise above flood stage late tonight and to crest around 16 feet at that time.
A Flood Warning remains in effect for the Alsea River at Tidewater; this river will continue to subside today before rising again late today and overnight. It is expected to rise back above flood stage Wednesday morning and crest near 18 feet.
* For the latest river conditions, go here.
A Coastal Flood Advisory remains in effect from 8:00am to 1:00pm today and tomorrow.
A Coastal Flood Watch remains in effect from Thursday morning through Friday morning.
Tidal overflow Tuesday and Wednesday…
* Tides will run about 1 to 2 feet above the astronomical predicted values this week. The highest tides of the cycle will occur around 10:00am to 11:00am through Wednesday. Tides will increase a little each day.
* Rivers will be running high through Wednesday and will contribute to flooding.
* Tidal overflow impacts include flooding of low-lying areas and some roads prone to tidal flooding can be expected to flood an hour or two before and after the highest tides.
Coastal flooding possible Thursday and Friday…
* There is some uncertainty, but current models indicate much higher waves are possible Thursday. West swells could reach 30-40 feet offshore. This, in combination with higher tides and storm surge would cause large breakers that run up much farther on the beaches. During high tides sea water could inundate normally dry areas impacting roads and structures along the immediate coast.
* Rivers and streams will be running very high Thursday and Friday which will contribute to any flooding.
* Extremely dangerous breakers of 30-40 feet may impact the beaches. If these conditions occur, destructive waves will wash over jetties and other coastal structures. It is extremely dangerous to venture near the surf zone or onto jetties during these conditions as debris and logs will likely be thrown far onshore. Significant beach erosion will also be possible.
* A storm surge of 1-2 feet will contribute to higher than normal tides. The main flooding would occur around the times of the high tides:
12/08 Tue 09:47 AM 8.66′ High
12/09 Wed 10:24 AM 8.91′ High
12/10 Thu 11:01 AM 9.11′ High
12/11 Fri 11:38 AM 9.23′ High
Businesses and residents in and near the surf zone, and also near bays and estuaries should be alert for the possibility of flooding and very high water surging inland and inundating normally dry areas by taking precaution.
A Flood Watch remains in effect through Thursday afternoon for the Central Coast and most of Northwest Oregon. Additional flooding possible on rivers through Thursday afternoon. The next heavy rain will move in late this afternoon over far Northwest Oregon and spread over the entire area today night and Wednesday morning. Rainfall totals Tuesday afternoon through Wednesday morning are expected to be 4-7 inches on the Central Coast and 2.5 inches in the Willamette Valley and I-5 corridor. Landslides and debris flows are possible during this flood event. People, structures and roads located below steep slopes, in canyons and near the mouths of canyons may be at serious risk from rapidly moving landslides. More rain on Thursday may contribute to additional flooding later in the week.
A Gale Warning is in effect for offshore waters today as SW winds rise to 30-35 knots gusting 45 with very rough combined seas of 20 feet at 13 seconds. Strong winds and very large seas are expected all week. Always check the latest Marine Forecast and Bar Reports before you attempt to venture offshore.