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**Severe Thunderstorms, a tornado, snow and flash flooding all expected after 12am tonight through SundayMorning*** After mainly light rain avriss the region the past 24 hours, the 1st sigba of a much lote intense, slow moving and significant band of flooding rains and possibke Severe Thunderstorms cam be seen...

16,955 Aufrufe • vor 8 Monaten •via X (Twitter)

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Major Storm to Impact Southern California As of Wednesday, February 12, 2025, at 6:50 PM PDT, the latest infrared satellite imagery confirms that the incoming storm system is fully developed and on track to deliver severe weather across Northern and Central California tonight into early Thursday afternoon. The system is intensifying rapidly, with a powerful surface cold front expected to sweep through San Luis Obispo to San Diego counties, bringing damaging winds, torrential rainfall, and the potential for severe thunderstorms. Key Storm Impacts: "Big Thursday" – A Major Weather Event • Extreme Rainfall Rates – 0.50 to 1.5 inches per hour, increasing the risk of urban flooding, flash floods, and mudslides, particularly in burn scar areas of Los Angeles County. • Damaging Winds – Southerly gusts of 45-65 mph, capable of toppling trees, damaging weak structures, and causing widespread power outages. • Severe Thunderstorm & Weak Tornado Potential – The latest HRRR model data (18Z, 0Z) indicates the presence of a squall line, increasing the risk of isolated severe thunderstorms and weak tornadoes between 12 PM and 10 PM Thursday. • Scattered to Widespread power Outages – Areas at risk include the San Fernando Valley, Santa Clarita Valley, Ventura County, and portions of Los Angeles County, where infrastructure could be severely impacted. • Urban Flooding Concerns – Locations such as Downtown Los Angeles, Pasadena, Altadena, and Pacific Palisades will experience rapid runoff and potential roadway flooding, creating hazardous travel conditions. The Seriousness of the Situation This storm is shaping up to be one of the most intense weather events of the season, posing a significant threat to life and property. Residents in Los Angeles County and surrounding areas must prepare for prolonged heavy rainfall, high winds, possible power outages, and dangerous road conditions. Authorities urge residents to stay indoors, avoid unnecessary travel, and prepare emergency supplies. Those in flood-prone and burn scar areas should be especially vigilant for potential debris flows and flash flooding. This is a rapidly evolving situation and further updates in the next 24 to 30 hours. #CAwx #CaliforniaStorms

Jason D Farhang

30,044 Aufrufe • vor 1 Jahr

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 Aufrufe • vor 6 Monaten

Wednesday, April 3, 2024, 5:42 PM PDT: All systems are a go for a cold and unseasonable Gulf of Alaskan April storm. Strong thunderstorms have already developed near Redding, California, and a series of embedded impulses are rotating around the main low axis off the coast of Humboldt County this afternoon. This storm system will undergo a brief 12 to 24-hour intensification process before hitting San Francisco, Santa Rosa, and Sacramento late Thursday afternoon. It will bring isolated strong to severe thunderstorm conditions. A large surface cold front will develop late Friday morning as the low axis trajectory slides down the coast towards Pismo Beach, California by Friday at dawn. Severe Weather Risk In Central And Southern California on Friday. The atmospheric conditions will become increasingly unstable, giving way to thunderstorms from central California to San Diego. The cold pool of air aloft, at minus 28 Celsius above 25,000FT, will create volatile weather conditions with the possibility of pea-sized hail and brief heavy rainfall in some areas. The air mass will be very cold, supporting a dusting of snow near the Grapevine and Cajon Pass. Temperatures will drop into the 40s and 50s, and the 30s near the mountains by Friday midday. As snow levels have been trending downward and hit rock bottom, there may be some isolated areas at 2,000-foot elevation along the San Gabriel’s and parts of the San Bernardino mountains that could see a dusting of snow. Even some dusting of snow in the high desert cannot be ruled out. There is a high confidence of elevated water spouts developing from San Luis Obispo to San Diego coastal zones, especially since one of the embedded disturbances will arrive on Friday from 11 AM to 7 PM. This is also the best opportunity for ample early April sun angle, which will give way to stronger convection across our region. I'm closely monitoring this developing situation in the next 24 hours. #Californiastorms #ElNiño #April2024

Jason D Farhang

23,214 Aufrufe • vor 2 Jahren

❄️ SNOWFALL REPORT: Week of 1/18 – 1/25 ❄️ This is a another BIG one. A HIGH IMPACT Winter Storm could develop late this upcoming week, with the potential to bring Heavy Snow and Ice to parts of the country. 🌨️ The heaviest Snow will likely fall on the north side of this storm Friday - Sunday, wherever it ultimately tracks. As we move through the week, I would not be surprised to see Winter Storm Watches and Warnings issued as it becomes more clear where this storm will setup. ❄️When it comes to exact locations and Snow totals, we are still WAY too far out to pin that down. That said, the most likely SNOW ZONE appears to be somewhere within the Tennessee and Ohio Valleys, though this will almost certainly shift as we get closer. ❄️Elsewhere, the Midwest will see a few rounds of light to moderate Snow Monday through Wednesday as a series of Alberta Clippers pass through. These should be minor systems, generally producing a few inches. ❄️ Boston, NYC, and parts of the Northeast will start the week with a healthy dose of Snow, with 4-5 inches possible by Monday morning. 🏔️ Out West, the Rocky Mountains from Colorado through Wyoming, Montana, and Idaho should pick up significant Mountain Snow, with over a foot possible in higher elevations. 🏔️The Cascades in Washington and Oregon will also see Snowfall, with a few feet possible in favored areas. ❄️The MAIN THING to remember this week: whoever gets hit by the late week Winter Storm could get A LOT of Snow, but there will also be plenty of busts nearby. That’s the nature of these storms. 👀 I’ll be watching this late week storm LIKE A HAWK 🦅and will post updated maps as details become clearer. ❄️ Get ready, my brotheren. This is shaping up to be an exciting week of weather tracking. May the odds of Snow be ever in your favor

Brady Harris

642,270 Aufrufe • vor 5 Monaten

SIGNIFICANT SNOWFALL POTENTIAL FRIDAY NIGHT ******1ST CALL MAP****** 🎄 Merry Christmas to YOU!!! A pretty sizable snowstorm is expected across the region Friday night, with snow developing as early as Friday evening. I am very confident in a widespread 6–10" snowfall for a large portion of the Tri-State area, with lower confidence closer to NYC, Long Island, and the Jersey Shore where mixing remains a concern. At this time, I am keeping some mixing in play in central NJ/Long Island, but I’m not totally sold on how aggressive it becomes. While 4–6" looks like a very solid floor, several areas could easily boom to 6"+ if colder air locks in faster and holds longer than currently modeled. ZONE 1 – 6–10" OF SNOW This is the zone where cold air damming will be most prevalent, allowing snow to remain all snow for the duration of the event. Expect higher snow ratios, which could allow many areas to push toward double-digit totals, especially under any persistent banding. I could easily pull this zone into NYC and Nassau County as we see more model data. ZONE 2 – 4–6" OF SNOW This zone will likely start with heavy, wet snow, before transitioning to a lighter, fluffier snowfall as colder air works in. Some compaction is expected with lower snow ratios, but additional snow and mesoscale banding could still drive totals toward or above 6" in spots. ZONE 3 – 2–4" WITH MIXING This zone remains VERY uncertain. I could make a strong argument that cold air advection dominates, keeping this mostly snow and allowing totals to reach 4–6". However, low-level warm air transport on an easterly wind may introduce sleet, especially along the Jersey Shore (east of GSP) and into Suffolk County, which would eat into accumulations. I’ll be watching trends closely as this is shaping up to be a sharp cutoff storm where small shifts could have big impacts. 📺 On TV now with the latest on PIX11 News

Mike Masco

242,183 Aufrufe • vor 6 Monaten

SUNDAY SNOWFALL — 2ND CALL ❄️ This setup shares similarities with today’s event, where lift and timing matter more than storm track of the coastal. While the primary coastal low stays offshore, a secondary zone of strong dynamics along the leading edge of arctic air will be the driver for snowfall Sunday. That zone favors Long Island and central NJ Sunday afternoon into the evening, supporting a widespread 2–4” snowfall. The BOOM potential remains over LI if the trough axis can swing from neutral toward slightly negative tilt — a signal consistently shown by the AI guidance, which has been notably steady with this idea. In this scenario your moisture transport off the Atlantic Ocean can be enhanced causing more surprises. I am being cautious on that. ❄️ZONE 1 | NW NJ / Hudson Valley Snow arrives earlier here with colder air already in place. Snow ratios will be higher, allowing coating–2” in most spots. With the front nearby at onset, isolated 3” totals can’t be ruled out, especially near I-87 and areas just east. ❄️ZONE 2 | Interior NJ, NYC, SE NY, CT (away from the immediate coast) This is the core 2–4” zone. While that sounds modest, this is a dynamic-driven snow, meaning totals could fluctuate sharply over short distances. I believe most of NE NJ, NYC, SE NY, and much of CT reach at least 2”, with localized overachievers possible. ❄️ZONE 3 | Coastal NJ & Southern Long Island Mixing remains the wildcard here. Small temperature and wind shifts will have an outsized impact, making this zone highly volatile and lower confidence overall. ⚠️ BOOM POTENTIAL: ALL OF LONG ISLAND & SE CT If snow banding locks in Sunday evening, this area could see an extended period of steady snow. In a perfect scenario, 4–6” is achievable, but confidence in that outcome is still low. More on the PIX11 News at 10pm

Mike Masco

20,050 Aufrufe • vor 5 Monaten

Monday, July 21, 2025 at 12:20 AM PDT: Southern California's weather this week remains relatively quiet compared to the extreme flooding impacting other parts of the country. However, eyes are now turning toward a developing tropical system off the coasts of Acapulco and Baja California. This system has the potential to enhance monsoonal moisture and influence our region between July 29 and August 6, with the most likely impacts occurring in early August. This period typically marks a westward shift in the monsoonal high-pressure axis, allowing deeper moisture to funnel into Southern California. Our region already saw a brief surge of monsoonal activity late last week (Thursday and Friday), signaling that the pattern may be primed for additional stronger robust events trending. What makes this setup notable is the potential interaction between monsoonal flow and tropical moisture, which could lead to a stronger and more sustained influx of moisture than we've seen so far this season and the escalation of warming of the Pacific Ocean continues. The latest forecast models in the last 72 hours have had consistent and comprehensive satellite trends that continue to be monitored closely as more details emerge over the coming days. Further updates will be issued as confidence increases regarding the track and strength of the strong monsoonal inverted influx and its potential impacts on the region. #CAwx #Monsoon2025 #HurricaneSeason

Jason D Farhang

11,792 Aufrufe • vor 11 Monaten

*SEVERE geomagnetic storm possible with U.S. aurora borealis display* *Northern lights possible at mid-latitudes early Sunday morning or Sunday night* *Specifics TBD – map coming later today* On Friday evening Eastern time, a major solar flare occurred from sunspot #4100. A sunspot is a bruise-like discoloration on the sun that throbs and pulsates with energy. Following the solar flare, which is a flash of light and radiation, a significant CME — or coronal mass ejection — was hurled directly toward Earth. Imagine a shockwave of magnetism and high-energy particles rippling through space like an interstellar tsunami. It’s heading for us at speeds around 1,200 miles per second — that’s very fast! We know it’s Earth-directed because our sensors indicate a “full halo” CME. See the solar material appearing to fan out in all directions? That’s an indicator it’s Earth-bound. It’s like if a train is coming right at you — you’d only see the train getting bigger. Once this electromagnetic shockwave reaches Earth, the energy will be absorbed and dissipated by our magnetic field. It will be transformed into visible light — the aurora. Since there’s a LOT of energy, we’ll probably get the aurora borealis (the northern lights) down to the mid latitudes. This could mean parts of the central United States, the Midwest, the Mid-Atlantic and perhaps as far south as northern California. There’s even a chance that parts of the Mid-South could see the aurora IF a direct impact occurs and the orientation of Earth’s magnetic field cooperates. Scientists at the Space Weather Prediction Center in Boulder, Colorado are working to iron that out.

Matthew Cappucci

10,381 Aufrufe • vor 1 Jahr