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Here's a loop of the wind gust forecast from Mon PM to Wed night. Localized gusts are expected to be higher; strongest expected overnight Tuesday into Wednesday morning, when gusts 50-70 mph possible. Be prepared for impacts. Details: #wawx #idwx

10,740 просмотров • 8 месяцев назад •via X (Twitter)

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BC, here’s the next update on the unusual bomb cyclone situation, on Nov 19th. (Scroll for wind forecast) The low pressure system - which is currently roughly 3,200 km SSW of Vancouver island - will race southeast over the pacific during the next 36 hours, while growing rapidly. But the weather system truly becomes problematic as it turns northeast Tuesday morning, where it will completely devour the low in the gulf of Alaska. The storm will explode in intensity, and as pressures plummet near the centre of the storm, winds will explode to numbers more typically seen in tropical cyclones. At this point the storm will be a major bomb cyclone, and will obtain peak intensity by late afternoon or early evening, roughly 400 km west of Vancouver Island. Peak intensify: • Max wind gusts: 185km/h • Min pressure: 944mb Yet the low casts uncertainty over parts of the BC south coast. Northern and western Vancouver island are likely to be impacted with very high southeasterly winds, but southern and eastern sections lay in a zone filled with possibilities. Despite that, I have gathered together the latest data, to create this forecast ⬇️ • Western Vancouver Island: Peak wind gusts 80 to 110km/h, except up to 140km/h near Brooks peninsula provincial park. Timeframe: Tuesday afternoon, through Wednesday. • Northern Vancouver Island: Peak wind gusts of 90 to 120km/h. Timeframe: Tuesday afternoon through Wednesday night. • Eastern Vancouver Island: Peak gusts of 70 to 100km/h. Timeframe: Tuesday evening, again gusting up to 90km/h near Comox on Wednesday. • Southern Vancouver Island: Peak gusts of 70 to 100km/h Tuesday evening, highest winds over western sections. Timeframe: Tuesday evening, with winds reaching-strengthening early Wednesday near the Haro Strait. • Sunshine Coast - Sechelt to Powell River: Peak gusts ranging 70 to 100km/h. Timeframe: Later Tuesday evening lasting into Wednesday. • Lower Mainland: Peak easterly wind gusts of 40 to 70km/h except southeast up to 90km/h near the Strait Of Georgia. Timeframe: Tuesday night - and into Wednesday near the coast. Prepare for power outages and travel delays. Secure lose objects. Another update will be posted Monday, Nov 18th. #BCStormWatch #BC #BCWind #Storm #BombCyclone #BCBombCyclone

Andrew Van Gameren

35,122 просмотров • 1 год назад

Christmas Eve and Christmas Day feature the most impressive severe thunderstorm setup I’ve seen along the California coastline in at least a decade. The first round of isolated severe thunderstorms will come ashore tonight, bringing the threat of a isolated tornado and severe wind gusts over 60 mph from the Central Coast up to Humboldt County. The severe weather threat then expands into the Central Valley during the afternoon, California’s tornado alley, with the potential for isolated tornadoes, damaging winds, and even large hail. The threat then shifts south into Southern California tomorrow, where isolated severe wind gusts and a brief tornado will be possible. However, Christmas Eve into Christmas morning features the most potent severe weather environment of the week and could lead to a severe thunderstorm outbreak along the coastline from the Central Coast up to the North Coast. The combination of strong low-level and deep-layer shear with sufficient instability is rarely seen in this part of the world. I seriously cannot recall seeing Significant Tornado Parameter (STP) values exceed 3 along the California coastline. The peak threat window appears to be from 10 PM Thursday to 8 AM Friday. It would not be out of the question to see a Severe Thunderstorm Watch issued Christmas Eve night with the potential for a couple tornadoes and scattered severe wind gusts. I also believe this may be the first time on record that San Francisco has been placed under a Marginal Risk for severe thunderstorms in the Day 1–3 NWS Storm Prediction Center Convective Outlooks.

Colin McCarthy

68,544 просмотров • 7 месяцев назад