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02:45 PM
September 25, 2023

Significant damage
Baseball-sized hail in Central Texas

Severe storms embedded with large hail brought significant damage to parts of central Texas on Sunday night.

Williamson County in Texas was hard-hit by large hail Sunday night. Up to baseball-sized hail destroyed windshields, dented cars, damaged homes, and even caused power outages. The city of Round Rock, Texas, was particularly hard hit by hail.

Large hail also led to significant issues on I-35. Drivers took shelter from the large hailstones underneath overpasses. The Kia Dealership in Round Rock also experienced significant damage to the vehicles on its lot. The weather also delayed the Austin FC soccer game at Q2 Stadium for several hours.

According to the Storm Prediction Center, there were 27 filtered reports of hail, and 10 reports of large hail.

Mary Mays
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01:08 PM
September 25, 2023

Tropical update
Philippe churns central Atlantic

Tropical overview

Now that Ophelia is just a soggy memory, this week’s tropical focus shifts back to the far eastern and central Atlantic.

The only named storm in the Atlantic at this time is Philippe. This tropical storm formed Saturday afternoon over the central tropical Atlantic. It remains weak as mid-level wind shear, or changes in speed and direction of upper-level winds, make it hard for the system to organize the thunderstorms into a larger system.

Current forecasts call for this system to remain weak as it moves to the northwest. Although it is moving over very warm water, this system will still encounter wind shear for the next several days. Either way, Philippe will remain far from land.

Tropical Storm PhilippeTrack map for Tropical Storm Philippe

Meanwhile, another low-pressure system is located over the eastern Atlantic just west of the Cabo Verde Islands. This system could develop into the year’s next system later this week as it too takes a northwest track far from land.

Another weak low-pressure system is located over the southeastern Gulf of Mexico just north of Mexico’s Yucatan Peninsula. Additional development isn’t expected with this system as upper-level winds make it hard for additional development.

Central Atlantic troublePhilippe and another system trying to develop are being watched over the Atlantic.

Weather & Radar will be providing updates of the tropics all season long. Check back often for the latest details and track all about the storms’ developments using our WeatherRadar.

James West
07:00 PM
September 24, 2023

Autumn trees
Which trees produce vibrant autumn show?

Vermont foliageThis image shows some of the many colors associated with autumn in New England. (Michelle Raponi via Pixabay)

It is starting to feel and look like autumn across many parts of the U.S. The autumn foliage season is in full swing across the Upper Midwest and New England with the colors starting to change across the more populated Eastern Seaboard and lower Midwest.

As you go out for a walk or hike to explore the changing seasons, you’ll notice a wide array of colors as part of autumn palette. You will note a splotch of crimson and yellow mixed in with some orange, yellows, browns, and greens. It is an earth-tone spectacle.

Crimson leavesMaple leaves often produce vibrant oranges and reds. (Pixabay)

The variety of colors seen this time of year is due to the variety of trees in the forest. Different tree types are known to produce different colors.

Bright yellows and bronze leaves are produced by hickories, aspen, poplar, and black maples. Beautiful reds and crimsons are common among oak, dogwood, tupelo and red maples. Most of the oranges, mixed in with red, are from sugar maples. Trees stressed by drought or disease along with some types of elms will produce drag browns and shrivel off their tree.

Yellow leavesFoliage can produce yellow leaves. (pixabay)

Deciduous trees — ones that do not have needles — change colors and lose their leaves in autumn to prepare for the cold winter ahead. The color change from green to the common autumn colors occur when trees, sensing the shorter days and longer nights, stop producing chlorophyll in their leaves. The loss of chlorophyll —the catalyst used to convert sunlight and water into sugar in plants— causes other pigments in the leaves to show. This is when the reds, yellows and oranges really show up.

Eventually, the trees cut off water and nutrients to the leaves, and the leaves die and fall off the tree and forests turn a muted brown as trees become bare until spring.

As you head out this autumn, take a few pictures and share them with us here.

James West
01:00 PM
September 24, 2023

Arctic and Antarctic
Sea ice extent dropping at alarming rate

The partially melting glaciers as polar bears walk in Svalbard and Jan Mayen on July 15th 2023.The partially melting glaciers as polar bears walk in Svalbard and Jan Mayen on July 15th 2023. - © picture alliance

Both Arctic and Antarctic sea ice is dropping at an alarming rate, significantly lower than normal for the time of year.

During this time of the year, towards the end of summer in the Northern Hemisphere, and the end of winter in the Southern Hemisphere, sea ice usually reaches its lowest extent.

However, what is unsettling, is that this current extent is unprecedented when comparing to previous averages or record lows, across both sides of the globe.

In the Arctic, sea ice is 6th lowest on record, behind 2012, 2020, 2007, 2016 and 2019. It is still declining despite the start of the northern hemisphere autumn.

Antarctica

Melting icebergs on Horseshoe Island, Antarctica.Melting icebergs on Horseshoe Island, Antarctica. - © picture alliance

Antarctica is experiencing an alarming decline in sea ice levels during its winter months, with measurements now reaching historic lows.

The once-stable sea ice surrounding Antarctica, which plays a crucial role in cooling the Earth, has dwindled to less than 17 million square km.

This figure represents a staggering 579 million square miles less than the average sea ice extent for September, and it falls well below the previous record lows ever observed during winter.

Sea ice extent in 2023 comparable to previous years and the average.Sea ice extent in 2023 comparable to previous years and the average. - © National Snow and Ice Data Center (NSIDC).

Such a dramatic reduction in sea ice has significant implications for global climate dynamics, as Antarctica transitions from being Earth's refrigerator to becoming a radiator of heat.

Experts are not optimistic about the possibility of a substantial recovery in sea ice levels. This trend is exacerbated by a recent extreme heatwave that struck East Antarctica in March 2022.

During this anomalous event, temperatures in East Antarctica reached around -10°C, a stark contrast to the typical -50°C temperatures expected there during that time of year.

Weather & Radar USA editorial team
02:27 PM
September 23, 2023

Tropical Update
Tropical Storm Ophelia makes landfall

Tropical Storm Ophelia made landfall near Emerald Isle, N.C., Saturday morning with sustained winds of 70 mph and higher gusts. Flooding rainfall, storm surge, and gusty winds continue to impact the Carolinas through the Mid-Atlantic this weekend.

Afternoon update

Ophelia has weakened as it has moved inland through eastern North Carolina. Winds are sustained at 45 mph with higher gusts and the wind field still extends as far as 320 miles from the center.

Multiple flood watches and warnings have been issued as the heavy rain continues, and storm surge and tropical storm warnings are still in effect Saturday afternoon.

Watch the live update!

Ophelia is churning in far eastern North Carolina this morning and it is moving north at 13 mph. Winds have come down a bit since landfall with 65 mph sustained winds, with higher gusts. More than 42,000 people are without power in North Carolina with almost 14,000 without power in Virginia.

Being so close to the coast kept Ophelia from strengthening further, even though it was technically just 4 mph away from becoming a category one hurricane. All hurricane watches have been discontinued but tropical storm warnings stretch from southern North Carolina to the Chesapeake Bay and southern Delaware.

Tropical Storm Ophelia's forecast track.Tropical Storm Ophelia's forecast track.

Ophelia will track northward into Virginia today before making a northeast turn overnight into Sunday toward southern New Jersey. Rainfall amounts as high as six inches are expected through Sunday night across the eastern Carolinas and the Mid-Atlantic. More widespread totals could reach four inches.

Storm surge along the North Carolina coast is still expected today, on top of high tide levels. Between one and four feet of storm surge is possible as Ophelia moves north into the Potomac River, Chesapeake Bay, the Delaware Bay, and through the central New Jersey coastline. Storm surge warnings have been issued.

The WeatherRadar shows rains from Opehlia extending northward into New England through Maryland and West Virginia Saturday morning and it will continue spreading through the Mid-Atlantic and Northeast this weekend. Be mindful of flooding due to the constant rainfall and have at least three ways to receive a weather warning.

Meanwhile in the eastern Atlantic, a disturbance, known as Invest 90L, that has good potential of becoming Philippe is being monitored.

No threat to land is expected at this time as forecasts note that it will stay in the central Atlantic.

Becca Parker