Greater Vancouver Area Severe Watches & Warnings NOAA Weather Radio

Areal Flood Watch
Statement as of 8:21 AM PST on December 20, 2014

...Flood Watch remains in effect from 4 PM PST this afternoon through Monday afternoon for southwest Washington and northwest Oregon...

The Flood Watch continues for southwest Washington and northwest Oregon from 4 PM PST this afternoon through Monday afternoon.

A classic atmospheric river type precipitation event is setting up over the Pacific northwest today...which will continue to impact the region into early Monday. A very long fetch of moisture with origins west to the South China Sea is feeding into this system...bringing the potential for very large rainfall totals across the region. A deep and moist westerly flow will develop today and continue through Sunday. With the flow forecasted to remain perpendicular to the Coast Range and Cascades for an extended period of time...expect strong orographic enhancement to lead to the highest rainfall totals over the mountains. The Coast Range...foothills and Cascades are expected to see in the range of 6 to 12 inches of rain...with locally higher amounts possible. Lower but still significant totals are expected for the lower terrain. Projected rainfall along the coast is forecasted to be around 4 to 8 inches. The interior lowlands should see 1 to 4 inches...with the highest amounts closer to the Cascade foothills.

Given the latest forecasted rainfall totals...it appears that there is the strong potential for flooding over the weekend on numerous rivers and tributaries draining the Coast Range and Cascades. A few rivers may even reach major flood stage. The Current River stage forecasts indicate that the faster responding rivers could reach flood stage as early as tonight. There are also likely to be impacts from Urban and Small Stream flooding and flooding along low lying pasture land.

In addition to the flooding concerns...excessive rainfall has the potential to create landslides...debris flows...and excessive runoff in the vicinity of recent wildfire burn scars. Burn scars from two large fires this Summer...the 36 pit fire in the Clackamas river basin near Estacada and the deception complex near Oakridge...will be particularly vulnerable.

Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on current forecasts.

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.

You should monitor later forecasts and be alert for possible flood warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

The next update for this watch will be issued by 10 PM Saturday night.

Public Information Statement
Statement as of 5:12 PM PST on December 20, 2014

...Latest and heaviest 24 hour rainfall reports by region...

Location amount time/date lat/Lon

...South Washington coast... 1 N Klipsan Beach (36 ft) 1.79 in 0438 PM 12/20 46.48n/124.05w Long Beach 1.70 in 0418 PM 12/20 46.35n/124.05w 1 ENE Long Beach (6 ft) 1.67 in 0436 PM 12/20 46.36n/124.03w

...North Oregon coast... Tillamook (11 ft) 4.01 in 0412 PM 12/20 45.46n/123.80w Tillamook Airport (36 ft) 3.41 in 0355 PM 12/20 45.42n/123.82w Wilson r at Tillamook (10 ft 2.80 in 0400 PM 12/20 45.48n/123.81w W f Satsop river (300 ft) 2.44 in 0430 PM 12/20 46.18n/123.56w Pacific City (27 ft) 2.40 in 0438 PM 12/20 45.20n/123.97w 3 SW Sandlake (13 ft) 2.39 in 0428 PM 12/20 45.26n/123.95w Astoria Airport (9 ft) 2.35 in 0355 PM 12/20 46.16n/123.88w 2 E Oceanside (1420 ft) 2.24 in 0437 PM 12/20 45.47n/123.92w 1 WSW Astoria (240 ft) 1.98 in 0400 PM 12/20 46.18n/123.84w Knappa (104 ft) 1.71 in 0429 PM 12/20 46.17n/123.58w 1 ESE Pacific City (252 ft) 1.68 in 0438 PM 12/20 45.18n/123.93w Oceanside (21 ft) 1.64 in 0433 PM 12/20 45.46n/123.97w Cannon Beach (22 ft) 1.59 in 0430 PM 12/20 45.89n/123.96w

...Central Oregon coast... 1 NW Yachats (32 ft) 3.30 in 0439 PM 12/20 44.32n/124.11w 1 se Florence (45 ft) 3.18 in 0432 PM 12/20 43.98n/124.09w 2 NNE Yachats (81 ft) 2.77 in 0438 PM 12/20 44.34n/124.09w 1 NNE Lincoln Beach (72 ft) 2.70 in 0433 PM 12/20 44.87n/124.04w dunes (120 ft) 2.65 in 0404 PM 12/20 43.96n/124.12w 1 S Otter Rock (141 ft) 2.32 in 0440 PM 12/20 44.72n/124.06w Newport Muni ap 2.30 in 0355 PM 12/20 44.58n/124.05w Newport (127 ft) 2.29 in 0438 PM 12/20 44.64n/124.06w 2 N Lincoln City (88 ft) 2.18 in 0438 PM 12/20 45.01n/124.01w Waldport (164 ft) 1.80 in 0432 PM 12/20 44.42n/124.07w

...Willapa Hills... Abernathy mtn (2000 ft) 2.72 in 0401 PM 12/20 46.35n/123.10w Rock Creek (1445 ft) 2.46 in 0430 PM 12/20 46.53n/123.40w Huckleberry Ridge (2424 ft) 2.39 in 0411 PM 12/20 46.50n/123.38w Brooklyn (1036 ft) 1.80 in 0430 PM 12/20 46.73n/123.55w Frances (231 ft) 1.40 in 0230 PM 12/20 46.54n/123.50w

...Coast Range of northwest Oregon... Tillamook 8 ENE (71 ft) 5.03 in 0430 PM 12/20 45.48n/123.72w Lees Camp (654 ft) 5.00 in 0400 PM 12/20 45.59n/123.52w 4 E Hebo (3160 ft) 4.93 in 0439 PM 12/20 45.21n/123.75w 4 ESE Hebo (2220 ft) 4.82 in 0410 PM 12/20 45.21n/123.77w Rye Mountain (2000 ft) 4.65 in 0414 PM 12/20 45.22n/123.53w South Fork (2256 ft) 4.11 in 0412 PM 12/20 45.60n/123.48w Nehalem river nr Foss (40 ft 3.46 in 0400 PM 12/20 45.70n/123.75w 1 WNW Jewell (569 ft) 3.30 in 0400 PM 12/20 45.94n/123.53w Tidewater (2035 ft) 3.06 in 0414 PM 12/20 46.01n/123.56w Miller (1030 ft) 1.75 in 0412 PM 12/20 46.02n/123.27w Nehalem river nr Vernonia 1.23 in 0415 PM 12/20 45.81n/123.28w

...Central Coast Range of western Oregon... 2 NNW Mapleton (41 ft) 3.80 in 0230 PM 12/20 44.06n/123.88w Cannibal Mountain (1939 ft) 3.53 in 0403 PM 12/20 44.35n/123.89w Summit (746 ft) 3.10 in 0400 PM 12/20 44.63n/123.58w grande ronde (395 ft) 2.90 in 0400 PM 12/20 45.05n/123.62w Village Creek (1565 ft) 2.72 in 0353 PM 12/20 44.25n/123.47w Wilkinson Ridge (1346 ft) 2.37 in 0357 PM 12/20 44.33n/123.72w High Point (1935 ft) 1.97 in 0353 PM 12/20 43.91n/123.40w

...Lower Columbia and I - 5 corridor in Cowlitz County... Castle Rock (212 ft) 1.42 in 0409 PM 12/20 46.27n/122.89w 2 WNW Longview (22 ft) 1.02 in 0440 PM 12/20 46.15n/122.98w Kelso-longview Airport 0.98 in 0355 PM 12/20 46.12n/122.89w 1 SSW Woodland (35 ft) 0.95 in 0433 PM 12/20 45.90n/122.75w Saint Helens (79 ft) 0.85 in 0439 PM 12/20 45.85n/122.82w

...Greater Vancouver area... Larch Mountain (1149 ft) 1.76 in 0409 PM 12/20 45.72n/122.35w 1 ESE Heisson (534 ft) 1.12 in 0424 PM 12/20 45.81n/122.46w Battle Ground (346 ft) 1.09 in 0438 PM 12/20 45.79n/122.54w 1 NE Lacamas Lake (387 ft) 1.08 in 0440 PM 12/20 45.62n/122.41w 1 se Orchards (254 ft) 1.04 in 0434 PM 12/20 45.65n/122.53w Lacamas Lake (331 ft) 1.02 in 0426 PM 12/20 45.61n/122.43w 1 NNW Lacamas Lake (246 ft) 1.01 in 0436 PM 12/20 45.62n/122.44w

...Greater Portland Metro area... scoggins crk blo Henry hagg 2.27 in 0400 PM 12/20 45.47n/123.20w 4 WSW Scappoose (1430 ft) 2.10 in 0345 PM 12/20 45.71n/122.96w Tualatin r nr Gaston (170 ft 1.93 in 0415 PM 12/20 45.44n/123.17w 1 NW Forest Grove (200 ft) 1.92 in 0430 PM 12/20 45.54n/123.13w 2 WNW Forest Grove (262 ft) 1.64 in 0428 PM 12/20 45.53n/123.14w Tualatin (241 ft) 1.52 in 0440 PM 12/20 45.37n/122.76w Scappoose Industrial Airpark 1.45 in 0353 PM 12/20 45.77n/122.86w 4 WNW Farmington (482 ft) 1.41 in 0440 PM 12/20 45.47n/123.02w Sherwood (176 ft) 1.36 in 0428 PM 12/20 45.35n/122.84w Cornelius (170 ft) 1.29 in 0347 PM 12/20 45.51n/123.06w 1 NW West Linn (649 ft) 1.28 in 0438 PM 12/20 45.38n/122.66w Tigard (220 ft) 1.26 in 0440 PM 12/20 45.41n/122.77w King City (175 ft) 1.20 in 0433 PM 12/20 45.40n/122.80w

...Central Willamette Valley... 6 SW Pike (755 ft) 4.00 in 0430 PM 12/20 45.31n/123.35w Falls City (419 ft) 3.80 in 0345 PM 12/20 44.88n/123.46w Rockhouse 1 (1797 ft) 3.14 in 0412 PM 12/20 44.92n/123.47w 4 SSW Dallas (459 ft) 2.83 in 0437 PM 12/20 44.86n/123.34w 1 WSW Dallas (436 ft) 2.40 in 0441 PM 12/20 44.92n/123.33w 1 NW Rickreall (205 ft) 2.11 in 0346 PM 12/20 44.95n/123.25w 3 WSW Scholls (1348 ft) 2.02 in 0428 PM 12/20 45.36n/123.01w 1 ESE Dallas (282 ft) 1.86 in 0440 PM 12/20 44.92n/123.30w 1 W Newberg (177 ft) 1.72 in 0440 PM 12/20 45.30n/122.99w 2 ENE Yamhill (666 ft) 1.64 in 0432 PM 12/20 45.35n/123.14w MC Minnville Municipal airpo 1.47 in 0353 PM 12/20 45.19n/123.13w Salem ap (mcnary field) 1.47 in 0358 PM 12/20 44.91n/123.00w 1 S Salem (319 ft) 1.46 in 0435 PM 12/20 44.90n/123.03w 1 NW Dallas (413 ft) 1.34 in 0438 PM 12/20 44.93n/123.33w Marion (308 ft) 1.32 in 0428 PM 12/20 44.75n/122.93w 1 WSW Salem (295 ft) 1.31 in 0439 PM 12/20 44.92n/123.06w 1 SSE Aumsville (377 ft) 1.30 in 0424 PM 12/20 44.83n/122.86w

...South Willamette Valley... Corvallis (308 ft) 1.89 in 0345 PM 12/20 44.42n/123.33w 1 S North Albany (207 ft) 1.73 in 0437 PM 12/20 44.65n/123.12w Monroe (401 ft) 1.61 in 0440 PM 12/20 44.32n/123.31w 2 S Philomath (308 ft) 1.60 in 0433 PM 12/20 44.50n/123.35w 2 NW Lacomb (534 ft) 1.29 in 0440 PM 12/20 44.61n/122.76w Eugene-Mahlon Sweet Field 1.28 in 0354 PM 12/20 44.13n/123.22w 2 SW Corvallis (238 ft) 1.14 in 0431 PM 12/20 44.55n/123.29w 7 ESE crow (810 ft) 1.12 in 0438 PM 12/20 43.94n/123.22w Santa Clara (380 ft) 1.11 in 0433 PM 12/20 44.11n/123.15w Eugene (1200 ft) 1.02 in 0439 PM 12/20 44.05n/123.11w

...South Washington Cascade foothills... Cougar (540 ft) 3.54 in 0434 PM 12/20 46.06n/122.29w 1 WSW Yale (462 ft) 3.27 in 0431 PM 12/20 46.00n/122.40w Canyon Creek (2500 ft) 1.73 in 0352 PM 12/20 45.92n/122.30w

...South Washington Cascades... Cougar 6 E (659 ft) 2.95 in 0220 PM 12/20 46.06n/122.20w Dry Creek (2700 ft) 2.26 in 0425 PM 12/20 45.94n/121.99w 1 NW Northwoods (1100 ft) 1.62 in 0438 PM 12/20 46.07n/122.02w Buck Creek (2690 ft) 1.37 in 0425 PM 12/20 46.06n/121.54w Elk Rock (2500 ft) 1.36 in 0401 PM 12/20 46.31n/122.39w

...Northern Oregon Cascade foothills... Yellowstone mtn (3080 ft) 3.16 in 0417 PM 12/20 44.59n/122.43w Horse Creek (3402 ft) 2.08 in 0427 PM 12/20 44.95n/122.40w pebble (3450 ft) 2.01 in 0353 PM 12/20 44.23n/122.99w 6 ENE Silver Falls (2315 ft) 1.80 in 0400 PM 12/20 44.95n/122.52w 2 NE Cherryville (1250 ft) 1.72 in 0431 PM 12/20 45.39n/122.11w 4 SSW Estacada (1079 ft) 1.00 in 0431 PM 12/20 45.23n/122.35w

...Northern Oregon Cascades... log creek (2800 ft) 2.86 in 0406 PM 12/20 45.50n/121.90w Jump Off Joe (3500 ft) 2.60 in 0300 PM 12/20 44.39n/122.17w South Fork Bull Run (2630 ft 2.10 in 0300 PM 12/20 45.45n/122.03w Boulder Creek (3570 ft) 2.05 in 0358 PM 12/20 44.72n/122.00w Santiam Junction (3750 ft) 2.00 in 0300 PM 12/20 44.44n/121.95w Wanderers Peak (4350 ft) 1.54 in 0407 PM 12/20 45.11n/122.20w Red Box (3250 ft) 1.48 in 0407 PM 12/20 45.03n/121.92w Three Lynx (1120 ft) 1.40 in 0415 PM 12/20 45.13n/122.07w

...Cascade foothills in Lane County... Trout Creek (2319 ft) 1.87 in 0414 PM 12/20 44.11n/122.58w Brush Creek (2130 ft) 1.48 in 0414 PM 12/20 44.28n/122.85w 2 W Walterville (595 ft) 1.13 in 0436 PM 12/20 44.07n/122.85w 2 W Walterville (574 ft) 1.03 in 0433 PM 12/20 44.07n/122.83w 2 WNW Disston (3064 ft) 0.96 in 0413 PM 12/20 43.73n/122.81w

...Cascades in Lane County... Emigrant (3840 ft) 1.20 in 0353 PM 12/20 43.48n/122.23w fields (3373 ft) 0.90 in 0417 PM 12/20 43.68n/122.30w

...Western Columbia River gorge... locks (127 ft) 2.33 in 0408 PM 12/20 45.67n/121.88w Prindle (239 ft) 1.40 in 0400 PM 12/20 45.59n/122.16w 2 SSE Rooster Rock state par 1.27 in 0431 PM 12/20 45.52n/122.22w 1 E Corbett (839 ft) 1.08 in 0438 PM 12/20 45.53n/122.27w

...Central Columbia River gorge... Hood River (698 ft) 1.27 in 0437 PM 12/20 45.70n/121.54w Hood River-Tucker bridge 1.20 in 0430 PM 12/20 45.65n/121.55w 3 WSW Hood River (698 ft) 1.03 in 0435 PM 12/20 45.69n/121.57w 1 WSW Hood River (465 ft) 0.93 in 0440 PM 12/20 45.70n/121.54w 1 ENE Underwood (406 ft) 0.93 in 0436 PM 12/20 45.73n/121.53w

...Upper Hood River Valley... 3 E Dee (1542 ft) 1.18 in 0434 PM 12/20 45.57n/121.55w middle mtn (2544 ft) 1.15 in 0414 PM 12/20 45.58n/121.60w

Observations are collected from a variety of sources with varying equipment and exposure. Not all data listed are considered official.