Several Atmospheric Rivers (ARs) are set to influence the coasts of Washington, Oregon, and Northern California starting Friday, October 13, 2023, and lasting through the following week. This sequence of weather events is forecasted to bring considerable rain, though no rivers are expected to exceed flood levels.
Over the next couple of days, the focus of impactful weather in the United States will shift into the northeastern region where a deepening upper-level trough is forecast to interact with the circulation associated with Tropical Storm “Philippe” currently moving northward across the western Atlantic toward Bermuda.
A storm system exiting the West will trigger widespread severe thunderstorms across the Plains on Tuesday. These storms are expected to produce large hail, damaging winds, heavy rain, possible flooding and a couple of tornadoes across the region. Ahead of this sprawling system, a number of record high temperatures are possible from the Upper Mississippi Valley and Great Lakes into the Northeast.
Record-breaking rainfall submerged streets and disrupted travel across the New York City metropolitan area on September 29, 2023. The deluge set new daily records and made this month the wettest September in New York City’s recorded history.
Tropical Storm “Ophelia” made landfall near Emerald Isle, North Carolina, around 10:15 UTC on September 23, 2023, with maximum estimated winds of 110 km/h (70 mph). The storm has since weakened into a post-tropical low but continued to pose a flooding risk across the Mid-Atlantic.
Meteorologists are closely monitoring a low-pressure system currently situated off the southeastern coast of the United States. Currently known as Potential Tropical Cyclone Sixteen, the system is expected to strengthen into a full-fledged tropical storm by the time it makes landfall in North Carolina on Saturday, September 23, 2023.
As per the National Hurricane Center’s latest advisory at 12:00 UTC (8:00 AM AST) on September 15, 2023, Hurricane Lee, currently over the western Atlantic Ocean, is anticipated to bring tropical storm conditions across parts of coastal New England by this afternoon.
Idalia has strengthened into a Category 2 hurricane and is expected to become a major hurricane tonight before it reaches the Big Bend coast of Florida. It is likely to still be a hurricane while moving across southern Georgia, and possibly when it reaches the coast of Georgia or southern South Carolina on Wednesday.
Tropical Storm “Harold” — the first Atlantic tropical cyclone to make landfall in the US for 2023, hit South Texas on Tuesday, August 22, 2023, delivering torrential rains and localized flash floods in areas along the Mexico border. This sudden impact came mere hours after its upgrade from a tropical depression on its trajectory across the Gulf of Mexico.
Tropical Storm “Hilary” — previously a Category 4 hurricane — reached California on August 20, 2023, marking its position as one of the rare storms to maintain integrity upon reaching the state. The storm, with surface winds over 80 km/h (50 mph), brought with it record-breaking rainfall and caused widespread flooding and power outages across the region.
