
Colorado snowpack sits below average entering March
Why it matters: Winter precipitation is crucial to the $17-billion outdoor industry — from skiing to rafting — and vital to taming wildfire threats in the hot, dry summer months.
State of play: The current statewide snowpack is 92% compared to the 30-year norm, which tracks with trendlines for La Niña years, according to U.S. Department of Agriculture data.
Yes, but: The northern half of the state — including the Colorado River headwaters — is at 100% or more, while the southern half of the state is as low as 64% of normal.
Catch up quick: Colorado started the winter season in the right direction with a late November storm, but then the spigot shut off with prolonged dry spells in December and January and milder temperatures, OpenSnow meteorologist Sam Collentine tells us.
The mid-February storm boosted the snowpack significantly, particularly along and north of Interstate 70.
What we're watching: March may be the make-or-break month, Collentine says. The snowpack will decline toward the end of February with higher sun and warmer temperatures, but multiple storms are in the forecast for March.

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The Hill
6 days ago
- The Hill
Have this giant, noxious weed in your yard? How to get rid of it — without burning yourself
(NEXSTAR) — The definition of a weed is relatively vague — a plant growing where you don't want it, experts explain — but some earn an extra adjective to describe them: noxious. That term has a federal definition, thanks to the Plant Protection Act: 'any plant or plant product that can directly or indirectly injure or cause damage to crops (including nursery stock or plant products), livestock, poultry, or other interests of agriculture, irrigation, navigation, the natural resources of the United States, the public health, or the environment.' One such massive, noxious weed may be growing in your yard, waiting to burn you if you try to remove it too quickly. Heracleum mantegazzianum, better known as giant hogweed, has been present in the U.S. for more than a century, according to the U.S. Department of Agriculture's National Invasive Species Information Center. Native to parts of Asia, researchers believe hogweed may have been brought to the U.S. as an ornamental garden option 'because of its extremely large size and impressive flower.' It's also possible its seeds, common in Middle Eastern cuisine, were among spice imports. Nonetheless, the giant hogweed has found its way around the country. The plant has been positively identified in several states, including Connecticut, Illinois, Indiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, Ohio, Oregon, Pennsylvania, Vermont, Virginia, Washington, and Wisconsin. The perennial plant lives up to its name, reaching heights of 20 feet with massive umbrella-like flowers that bloom between May and July. The flowers, which grow in clusters, can reach diameters of 2.5 feet, according to the Washington State Noxious Weed Control Board. Hogweed stems and stalks, reaching up to 4 inches in diameter, have purplish-red blotches and stiff hairs. The leaves have toothed edges and can grow to 5 feet wide. You can see photos of the stem, leaf and flower of a giant hogweed plant in the slideshow below. Hogweed is often found in moist areas, like along streams and rivers, where there is also shade. The massive plant is capable of causing soil erosion in these areas, which can give way for the seeds to be dispersed downstream to other areas, the Wisconsin Department of Natural Resources explains. It's not unlike cow parsnip, a plant native to the U.S. Cow parsnip can often appear tall, as seen in the photo below, with heads of white flowers and wide leaves. There are some notable differences between cow parsnip and giant hogweed, however. The New York Department of Environmental Conservation points to its size, for starters: Cow parsnip can reach roughly 6 feet in height, with flowers that are about a foot in diameter and leaves reaching 2 feet wide. That's all about half of the size that hogweed can reach. Officials also say cow parsnip's stems do not have the purple blotches found on hogweed. Despite their differences, both plants are capable of irritating your skin. Sap from cow parsnip leaves and stems can give you a 'blistery rash' if you have sensitive skin, officials in Maine explain. Giant hogweed sap, found on all parts of the plant, can lead to severe burns in as little as a day, Nexstar's WIVB reports. If you have sap on your skin and are in the sun, you can develop phytophotodermatitis, a skin condition brought on by chemicals found in certain plants and fruits, like citrus. 'The sap interferes with the skin's natural ability to protect itself from sunlight, resulting in severe burning and blistering,' according to an article from the University of Maryland Extension. 'If sap goes into the eyes, it can cause temporary or permanent blindness.' Phytophotodermatitis can appear like sunburn on your skin, the Mayo Clinic explains, and develop itchy patches like eczema. The condition can last for several months, with treatment limited to 'self-care measures, such as soothing the affected skin with a cool, wet cloth.' If you come in contact with giant hogweed sap, Supervising Park Ranger Chuck Bartlett of Erie County, New York, recommends washing your skin with soap and water 'as soon as absolutely possible' while avoiding sunlight. Managing hogweed in your yard or on your property can vary based on the size of the plant. As seedlings or young plants, Washington state officials say giant hogweed can be dug up or hand-pulled, as long as you're wearing protective gear to avoid contact with the sap. You can also cut back larger plants before digging them up, bagging the plant and its flowers for disposal. You may also require a herbicide treatment, which could require assistance from an expert, Minnesota officials explain. If you live in a state that has not yet confirmed the presence of hogweed and believe you have spotted the noxious weed, you may want to document the sighting and report it to agriculture or wildlife officials before removing it.


Boston Globe
15-07-2025
- Boston Globe
Tropical disturbance near Florida to dump extreme flooding rain along Gulf coast
What comes next remains to be seen, as the core of the storm will glide along the shallow waters of the Gulf, likely paralleling the coastline. There is a 40 percent chance that the storm will form a tropical depression and a lesser chance for winds to strengthen to what would be Tropical Storm Dexter. Essentially, a weak pocket of high pressure over the interior southeast may not be strong enough to direct the storm out to the Gulf, which is a good sign in terms of winds. Regardless, sea surface temperatures in the northern Gulf are running in the upper 80s, with the atmosphere already full of moisture. Heavy rain is a lock across the Gulf coast, bringing flooding chances along the Florida panhandle to Louisiana by later in the work week. Advertisement A 40 percent chance for a tropical system to develop exists, mainly over the Gulf. Model tracks show the storm paralleling the Gulf Coast. Boston Globe The highest risk for extensive flooding exists in portions of Louisiana on Thursday and Friday, where the low-lying plain will be doused with 6 to 12 inches of rain in a hurry. This may lead to numerous flooding events, with flooding emergencies possible across New Orleans and Baton Rouge. As of now, it appears this system will stall out over Louisiana and Mississippi, which can create a very dangerous scenario heading into the weekend. Advertisement There is a chance for parts of the Gulf, especially Louisiana, to see double-digit rainfall totals as the tropical system dumps extreme rainfall. Boston Globe Will New England see remnant impacts? In a way, yes. Most of the moisture will push north along the Mississippi River heading into the weekend and will begin to wring out as the western edge of that pocket of high pressure over the Southeast pulls some of the moisture toward the Northeast. The remnant moisture will marginally support a separate system that will lurk near New England this weekend, but it will be minimal and held mostly to the south of our region. How is Atlantic hurricane season shaping up The current season is pacing ahead of schedule. We've had three named storms already, and the third storm is typically named by an average date of Aug. 3. The first named hurricane typically forms by Aug. 11. So we're essentially about three weeks ahead of a typical year, which usually produces 14 named storms, seven hurricanes, of which three usually evolve into a major, Category 3 or higher, hurricane. The National Hurricane Center predicts an above-average season with 13 to 19 named storms, 6 to 10 hurricanes, and between 3 and 5 major hurricanes. Above-average sea surface temperatures, along with the absence of a formidable El Niño or La Niña, are behind the slight increase in forecast tropical activity this season. NOAA predicts an above-average hurricane season for the Atlantic basin. Boston Globe Ken Mahan can be reached at
Yahoo
11-07-2025
- Yahoo
Global climate pattern shows signs of shifting. What will happen in the US?
Early signs of a possible La Niña fall and winter are emerging in some climate models, federal forecasters announced July 10. La Niña is a part of a natural climate cycle officially known as El Niño – Southern Oscillation, called ENSO by scientists. The cycle swings between warmer and cooler seawater in a region along the equator in the tropical Pacific. La Niña is marked by cooler-than-average ocean water in the region. It is one of the main drivers of weather in the United States, especially during the late fall, winter and early spring. It's the opposite of the more well-known El Niño, which occurs when Pacific Ocean water is at least 0.9 degree warmer than average for three months. La Niña and El Niño typically have minimal impact on summer weather in the United States, other than some effects on hurricanes. Winter is the one season when they have the most impact. A typical La Niña winter in the United States brings cold and snow to the Northwest and unusually dry conditions to most of the Southern states, according to the Climate Prediction Center. The Southeast and mid-Atlantic also tend to see higher-than-average temperatures during a La Niña winter. Meanwhile, New England and the Upper Midwest, including New York, tend to see lower-than-average temperatures, the Weather Channel said. More: Will a hurricane impact your state in 2025? Odds get an update. The typical impacts of a La Niña winter in North America include a wetter, colder winter in parts of the northern United States and a drier, warmer winter in parts of the southern United States. La Niña is a natural climate pattern marked by cooler-than-average seawater in the central and eastern Pacific Ocean. When the water cools at least 0.9 degree Fahrenheit below average for three straight months, a La Niña is declared. "While this may sound like a small change in temperature, it can cause significant changes in the weather patterns around the globe," AccuWeather meteorologist Brian Lada said. In general, La Niña conditions favor hurricane development in the Atlantic basin, which includes the Caribbean Sea and the Gulf of America, formerly known as the Gulf of Mexico. This is because during La Niña, the strong storm-killing winds known as wind shear relax across the Atlantic basin, allowing hurricanes to more easily develop. Hurricane researcher Phil Klotzbach of Colorado State University, in a July 10 email to USA TODAY, explained that "while Caribbean shear has been quite strong in June and is likely to remain strong throughout most of July, the potential trend more towards cool neutral (or even weak La Niña) later in the season may result in lower shear in the Caribbean later in the season." The lower the wind shear, the greater the chance for hurricane development in the Atlantic basin. But the status of ENSO is only part of the hurricane puzzle: Twenty years ago, in 2005, for instance, ENSO-neutral conditions also occurred in the Pacific ‒ and that year spawned the infamously destructive hurricanes Katrina and Rita, the National Weather Service said in an online report. Right now, it appears to be a toss-up. While so-called "ENSO-neutral" conditions are most likely through the late summer, thereafter, chances of La Niña conditions increase into the fall and winter 2025-26, forecasters from the Climate Prediction Center (CPC) said July 10. In fact, one climate model used by the CPC – the North American Multi-Model Ensemble – "favors the onset of La Niña conditions during the Northern Hemisphere fall," the CPC said in its monthly update. Japan's weather bureau also announced July 10 that there is a 40% chance of La Niña emerging in the fall. Overall, the CPC said the chances for La Niña remain comparable to the likelihood of ENSO-neutral continuing. ENSO-neutral means neither El Niño (warmer waters) nor La Niña (cooler waters) conditions are dominant in the Pacific. While El Niño and La Niña have expected impacts on global seasonal weather and climate, what about neutral? "ENSO-neutral doesn't mean we expect upcoming seasonal rain, snow, and temperature to be close to average," writes Emily Becker in the CPC's ENSO blog. "Rather, during neutral, we don't have the same predictive information that El Niño and La Niña's atmospheric changes provide, making upcoming patterns harder to predict very far in advance." Contributing: Reuters This article originally appeared on USA TODAY: 2025 La Niña forecast says major shift may be brewing