Cape Flattery to Cape Shoalwater WA between 150 and 250 NM Offshore Forecast
| Today...Sw Winds Less Than 10 Kt, Becoming S. Seas 6 To 8 Ft. Chance Of Rain. |
| Tonight...S To Se Winds 10 To 20 Kt. Seas 6 To 7 Ft. Chance Of Rain. |
| Thu...Sw Winds 5 To 15 Kt, Becoming W 10 To 20 Kt. Seas 5 To 8 Ft. Chance Of Rain. |
| Thu Night...W Winds 15 To 25 Kt, Becoming N To Nw. Seas 6 To 10 Ft. |
| Fri...N To Nw Winds 15 To 25 Kt. Seas 7 To 10 Ft. |
| Fri Night...W To Nw Winds 5 To 15 Kt, Becoming Sw. Seas 7 To 9 Ft. |
| Sat...S To Sw Winds 15 To 25 Kt. Seas 7 To 8 Ft. |
| Sat Night...W Winds 15 To 25 Kt. Seas 7 To 12 Ft. |
| Sun...W To Sw Winds 15 To 20 Kt. Seas 8 To 12 Ft. |
| Sun Night...W Winds 15 To 20 Kt, Becoming Sw. Seas 10 To 12 Ft. |
| Area Forecast Discussion National Weather Service Seattle WA 901am PDT Wednesday April 24 2024 Surface observations have the front from just east of Bellingham to just east of Hoquiam at 8 am this morning. Front will continue to move slowly east today moving into the Cascades this afternoon. Rainfall amounts along the north coast were around a tenth of an inch with just a few hundredths in the Northwest Interior. Weakening front combined with westerly flow aloft will create a rain shadow over the Central Puget Sound but even outside of the Central Puget Sound rain amounts with the front expected to be 0.05 inches or less. Main weather story today is the cooler temperatures with highs in the 50s. Today will be the first day of at least the next 7 days with highs in the 50s for Western Washington. Forecast on track this morning. Previous discussion follows plus updated aviation and marine sections. Synopsis Weak front moving inland today. This will mark the beginning of a cool and wet last week of April with an upper level trough over the area and a couple of systems moving through over the weekend and Monday. Snow levels will lower over the weekend to near 2500 feet Monday for possible snow on all the mountain passes the first part of next week. Short Term - Today through Friday A pattern change brings cooler and wetter weather back to western WA starting today. This is due to an upper low moving through B.C. while dragging a weak front over the region. KLGX is picking up on light rain along the coast this morning. Rain will spread into the interior this afternoon with light amounts expected - trace to 0.05" along I-5. With onshore flow and cloudier conditions temperatures will track closer to average and in the 50s. Wet weather continues on Thursday with an upper level trough crossing the area. Precipitation totals, overall, are greater compared to Wednesday with measurable rain expected across all lowlands. Showers linger into Friday with a deep trough across the West. Widespread measurable rain is expected again across the area. Three-day rainfall totals are around 0.50-1" in the interior with 1-2" along the coast. Snow levels are around 4500' for mainly rain at the Cascade highway passes. 33 Long Term - Saturday Through Tuesday Upper level troughing over the Pac NW continues into this weekend for more rain and (high elevation) mountain snow. There's little break in the action with a pair of frontal systems pushing inland, thus maintaining moist S/SW flow over the area. A deep upper low wobbles overhead as we move into next week, keeping the air mass cool and showery. Lows will track cooler than average and in the mid to upper 30s to lower 40s. The cool spots will be over the south sound. Highs will also be a few degrees below average and in the mid 50s. Snow levels will lower to around 2500' on Monday and the mountain highway passes may see a few inches of snow. Overall, a cool and wet end to the month. 33 Marine A weak frontal system is approaching the area from the northwest. Winds through the Strait of Juan de Fuca have diminished, allowing the Small Craft Advisory to expire this morning. A more substantial system will move through the area waters on Thursday. Some uncertainty remains in how strong this winds will be along the coastal waters. With probabilities of seeing SCA (Small Craft Advisory) winds highest in the waters south of Point Grenville (from 50-75%), a Small Craft Advisory has been issued for Thursday. A weak surface ridge will momentarily ease wind speeds for Saturday before an active pattern re-emerges Sunday. Seas look to remain 4 to 6 feet at about 10 seconds through the rest of the week and into Saturday. McMillian/LH Hydrology No river flooding expected in the next 7 days. Heavier rain over the south slopes of the Olympics Thursday and Thursday night could push the Skokomish River in Mason county NOAA Seattle WA Office: Watches - Warnings - Advisories WA...None. PZ...Small Craft Advisory from 5am to 5pm PDT Thursday for Coastal Waters From Point Grenville To Cape Shoalwater 10 To 60 Nm- Coastal Waters From Point Grenville To Cape Shoalwater Out 10 Nm. |
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