#weather-forecasting

#weather-forecasting

Parts of Los Angeles will probably see rain after 11 p.m. Saturday, with scattered showers anticipated on Sunday afternoon before 2, and a potential for thunderstorms in some parts of the city.

After 21 hours of talks, US and Iran did not reach a deal to end the war, as Vice President JD Vance said talks stalled after the US made a final offer pushing for stronger guarantees that Iran won't develop nuclear weapons.

Snow will reach Tasmania first on Friday night, then spread into Victoria overnight, and finally reach New South Wales resorts on Saturday, tapering off by Sunday evening.

Kennedy predicts hot and dry conditions from the west will shift eastward later this week, allowing for a noticeable warm-up and shift towards spring-like conditions.

"This is going to help fill that gap in minutes to hours lead time that's vital to know where the heaviest rain is going to hit," Ralph said. "And when and what communities are going to be affected so people in the preparedness community and water resource management community can take action to help protect people's lives and property."

The storm from Sunday into Monday has the potential to become a bomb cyclone, which occurs when central pressure drops at least 0.71 inches of mercury (24 millibars) in 24 hours or less. That rapid strengthening would generate an expansive and intense wind field.

A 30% chance of rain means that there is a small chance - three times out of 10 - that it will rain, but seven times out of 10, it will stay dry. And that 30% could still mean a heavy downpour for the full length of time covered by the forecast, or a brief five-minute shower right at the end.

Google tasked Gemini with sorting through 5 million news articles from around the world and isolating flood reports. It transformed this data into a geo-tagged series of chronological events. Next, researchers trained a model to ingest current weather forecasts and leverage the Groundsource data to determine the likelihood of a flash flood in a given area.

When scientists applied a new model of human survivability that takes into account the body's ability to function and stay cool depending on age, they found all six events had seen non-survivable periods for older people who could not find shade.

Successive punches of snow, wind and severe weather are "going to impact the eastern half of the United States," AccuWeather senior meteorologist Tyler Roys said in an interview. Beyond the threat to lives and property, "whether it's wind gusts from a squall line, blizzard or snow, or just wind because of the storm, you're looking at several major airports being impacted."

While humans have assembled a lot of weather data, flash floods are too short-lived and localized to be measured comprehensively, the way the temperature or even river flows are monitored over time. That data gap means that deep learning models, which are increasingly capable of forecasting the weather, aren't able to predict flash floods.

Met Éireann is progressing in the area of more localised weather warnings, via the use of polygons to represent areas under warnings. This will mean a move away from county-based warnings to a sub-county-based warning approach, which will identify where the expected impacts will be in the county.

When I spoke with emergency management officials last year, they all mentioned the same frustrating scenario. People ignore storm warnings until the precipitation starts falling, then suddenly everyone rushes out at once. The roads become congested with anxious drivers, accidents spike, and stores run out of essentials just when people need them most. But here's what really gets meteorologists worked up about this pattern. Modern weather forecasting has become incredibly accurate, especially for major winter storms.

In November 2025, a massive storm rolled across the lower Mekong River delta, dumping multiple inches of rain onto the wide, flat river plain that covers much of Cambodia. The river rose and rose. The force of the water churned up mud from the river bottom. The muddy water flowed downstream and rushed into the many farming and fishing towns that line the Mekong's banks.

Growing up outside Manchester, I spent countless summer holidays at my grandparents' farm in the Yorkshire Dales. My grandfather would step outside each morning, scan the sky, and announce with absolute certainty what the weather would do that day. No smartphone apps, no weather channel, just decades of observation. I used to think it was nonsense. How could watching birds or looking at clouds possibly compete with satellite technology? But here's the thing: he was almost always right.

The pattern change began Monday when the barometric pressure surrounding the region started to fall gradually. That increase in low pressure is coming from the southwest and the air is flowing north, opposite of many winter low-pressure systems that dip in from the Pacific Northwest. As a result, light but steady rain is expected to start in Monterey County and the Central Coast late Tuesday morning. The rain is expected to reach the region closer to San Francisco sometime Tuesday night, Murdock said.