468 ¢ U.S. Coast Pilot 7, Chapter 11 31 MAY 2020 Chart Coverage in Coast Pilot 7—Chapter 11 124° NOAA’s Online Interactive Chart Catalog has complete chart coverage 18480 http://www.charts.noaa.gov/InteractiveCatalog/nrnc.shtml 126° 125° Cape Beale V ANCOUVER ISLAND (CANADA) 18485 Cape Flattery S T R A I T O F Neah Bay J U A N D E F U C A Cape Alava 18460 48° Cape Johnson QUILLAYUTE RIVER W ASHINGTON HOH RIVER Hoh Head 18480 QUEETS RIVER RAFT RIVER Cape Elizabeth QUINAULT RIVER COPALIS RIVER Aberdeen 47° GRAYS HARBOR CHEHALIS RIVER 18502 18504 Willapa NORTH PA CIFIC OCEAN WILLAPA BAY South Bend 18521 Cape Disappointment COLUMBIA RIVER 18500 Astoria 31 MAY 2020 U.S. Coast Pilot 7, Chapter 11 ¢ 469 Columbia River to Strait of Juan De Fuca, Washington (1) This chapter describes the Pacific coast of the State (15) of Washington from the Washington-Oregon border at the ENCs - US3WA03M, US3WA03M mouth of the Columbia River to the northwesternmost Chart - 18500 point at Cape Flattery. The deep-draft ports of South Bend and Raymond, in Willapa Bay, and the deep-draft ports of (16) From Cape Disappointment, the coast extends Hoquiam and Aberdeen, in Grays Harbor, are described. north for 22 miles to Willapa Bay as a low sandy beach, In addition, the fishing port of La Push is described. The with sandy ridges about 20 feet high parallel with the most outlying dangers are Destruction Island and Umatilla shore. Back of the beach, the country is heavily wooded. Reef. A U.S. Navy operating/exercise area parallels the Numerous summer resorts and cottages are along the coastline from about 10 miles north of Point Brown to beach. Landmarks along this section of the coast are Cape Alava, extending from 3 miles offshore to about 50 few. The 10–fathom curve averages a distance of about miles offshore. 2.5 miles from the shore. There are no known offlying (2) The Olympic Coast National Marine Sanctuary, off dangers south of the Willapa Bay entrance bar. the Olympic Peninsula of Washington State, including the waters of the Strait of Juan de Fuca, extends from Koitlah (17) Point due north to the international boundary seaward to Weather, Columbia River to Strait of Juan De Fuca the 100 fathom isobath, thence southward to a point due (18) The weather along this coast is usually mild, windy west of the mouth of the Copalis River cutting across the and rainy in winter and cool and pleasant in summer, with heads of Nitnat, Juan de Fuca and Quinault Canyons. (See some periods of fog. Close to shore, and particularly in 15 CFR 922, Chapter 2, for limits and regulations.) Willapa Bay and Grays Harbor, wind and fog conditions are often local and different from conditions offshore. (3) Radiation fog often blankets these bodies of water, as well Area to be Avoided, Washington Coast as rivers and shore points, in fall and winter. It can form (4) The International Maritime Organization (IMO) any time when nights are clear and calm. has adopted the waters off the Washington Coast as an (19) Storms that move along this coast or a distance out to area to be avoided. (See IMO SN circular 309.) In order sea bring cloudy days with highs in the mid-forties (6.1° to reduce the risk of a marine casualty and resulting to 8.3°C) and lows in the middle to upper thirties (3.3° pollution and damage to the environment of the Olympic to 3.9°C). In winter, they cause rain on about 15 to 25 Coast National Marine Sanctuary, all ships and barges days per month and significant snow on 2 or 3 days. They that carry oil or hazardous materials in bulk as cargo or are responsible for predominantly east to southeast winds cargo residue and all ships 400 gross tonnage and above from October through March; these winds reach gale force solely in transit should avoid the area bounded by a line 3 to 6 percent of the time. In the intermittent periods of connecting the following points: settled weather, sound becomes an early morning hazard (5) 48°23.30'N., 124°38.20'W. over rivers and protected bays. Visibilities drop below 0.5 (6) 48°24.17'N., 124°38.20'W. mile (0.9 km) on 3 to 4 days per month, from October to (7) 48°26.15'N., 124°44.65'W. February. (8) 48°26.15'N., 124°52.80'W. (20) With the coming of spring, conditions improve. (9) 48°24.67'N., 124°55.71'W. Storms become less frequent. Winds diminish and blow (10) 47°51.70'N., 125°15.50'W. more from a west direction. Temperatures often rise into (11) 47°07.70'N., 124°47.50'W. the low to middle fifties (11° to 13°C) during the day and (12) 47°07.70'N., 124°11.00'W. fall to the low forties (5.0° to 5.6°C) at night. Visibilities (13) are usually good, and rain falls on just 8 to 15 days per COLREGS Demarcation Lines month. (14) The lines established for this part of the coast are (21) Summer is the true fog season along these shores. In described in 33 CFR 80.1370 through 80.1380, Chapter general, advection fog reduces visibilities to below 0.5 2. mile (0.9 km) on 3 to 10 days per month; up to 16 days per month at Tatoosh Island. Sound signals blow 15 to 30 percent of the time. Conditions are worst in Grays Harbor and near the entrance to the Strait of Juan de Fuca. Temperatures are often in the sixties (16.1° to 20.6°C) 470 ¢ U.S. Coast Pilot 7, Chapter 11 31 MAY 2020 (23) METEOROLOGICAL TABLE – COASTAL AREA OFF ASTORIA, OR Between 46°N to 48°N and 122°W to 127°W YEARS OF WEATHER ELEMENTS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC RECORD Wind > 33 knots ¹ 5.1 4.9 3.9 1.4 0.7 0.3 0.1 0.3 0.5 2.4 5.1 6.6 2.3 Wave Height > 9 feet ¹ 8.0 6.9 5.9 3.4 1.9 1.7 1.3 0.9 1.3 4.0 8.7 9.3 4.0 Visibility < 2 nautical miles ¹ 8.0 7.0 5.8 3.6 4.5 4.7 5.7 8.7 6.7 7.5 5.7 7.8 6.3 Precipitation ¹ 21.1 19.7 17.6 13.1 10.9 8.6 5.1 6.5 7.8 12.5 20.0 22.0 13.0 Temperature > 69° F 0.0 0.0 0.0 0.0 0.2 0.6 2.1 2.0 1.2 0.2 0.0 0.0 0.6 Mean Temperature (°F) 45.6 47.0 47.7 49.6 52.9 56.4 59.5 60.3 59.8 56.1 50.9 47.6 53.4 Temperature < 33° F ¹ 2.3 0.6 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 1.4 0.4 Mean RH (%) 84 84 82 82 84 84 85 87 85 84 83 84 84 Overcast or Obscured ¹ 46.4 43.7 38.4 35.0 36.3 41.5 42.1 41.9 32.3 35.4 41.7 45.6 39.9 Mean Cloud Cover (8ths) 6.0 5.9 5.6 5.6 5.7 6.0 5.6 5.5 4.8 5.2 5.8 6.0 5.6 Mean SLP (mbs) 1017 1016 1016 1018 1018 1018 1019 1018 1017 1017 1016 1017 1017 Ext. Max. SLP (mbs) 1045 1041 1058 1040 1050 1043 1038 1037 1049 1040 1042 1050 1058 Ext. Min. SLP (mbs) 970 975 974 978 985 988 991 991 978 980 964 963 963 Prevailing Wind Direction S S S NW NW NW NW NW N S S S NW Thunder and Lightning ¹ 0.2 0.3 0.3 0.1 0.2 0.1 0.1 0.2 0.3 0.3 0.5 0.3 0.2 ¹ Percentage Frequency during the day and around 50°F (10°C) at night. Winds In the daytime, scars on the cliffs often are visible before are from a west to northwest direction and usually less the light can be seen. The termination of the tree line on than 17 knots; calms occur up to 12 percent of the time. Leadbetter Point is sharply defined. It rains on about 5 to 10 days per month. (22) Fog remains a problem in autumn, although it is less (31) The entrance is in the north part of the bay and has frequent. Temperatures drop slowly with daytime two arms; the south arm is 18 miles long and the east readings often in the low to midsixties (16.1° to 19.4°C), is 10 miles long. Both arms are filled with extensive dropping to the upper forties (8.9° to 9.4°C) at night. Rain shoals; large areas that bare at low water. The south arm falls more often. Winds become stronger and return to an is separated from the ocean by a strip of low sand and east direction. sand dunes, averaging 1.5 miles in width and covered (25) with trees until within 2.2 miles of Leadbetter Point. ENCs - US5WA70M, US5WA70M Numerous cottages and summer resorts are along the Chart - 18504 seaward face of the narrow peninsula.