Ice Storms and Shreveport Trees: What Actually Breaks, and Why

Ask most people what threatens trees in Louisiana and they will say hurricanes. In Shreveport that answer is wrong, and the climate record says so plainly. The Southern Climate Impacts Planning Program's Shreveport profile lists two December ice storms as the events that did the most damage to this area's trees and power grid: December 1998, which left 250,000 customers without power and some of them without it for over a week, and December 2000, which caused $133 million in damage, killed two people, cut power to 235,000 customers, collapsed twenty-nine steel tower transmission lines, and blocked 205 streets in Shreveport-Bossier City with tree limbs.

That is the case for treating freezing rain as the main event here rather than a footnote to hurricane season. This guide covers why ice loads a canopy differently than wind does, which species the published lists already rate as weak, what is worth doing in the weeks before a freezing rain forecast, what nobody should attempt while the ice is still on, and the order the work goes in once the thaw comes. It is written for a homeowner deciding what to spend on trees this winter, not for an arborist.

Why does a quarter inch of ice do what a sixty mile per hour gust does not?

Wind is intermittent and directional. A healthy canopy bends, sheds air, and gets a break between gusts. Ice is neither of those things. Freezing rain plates every twig, every needle and every branch surface at once, then keeps adding while the temperature stays down, and the load never releases. It also lands on the parts of the tree with the most surface area and the least structural wood, so the leverage works against the tree from the outside in. That is why the accumulations that matter locally sound so small: the National Weather Service office in Shreveport recorded a quarter to a half inch of ice across deep East Texas and central Louisiana during the February 2021 outbreak, and as much as an inch in southwest Arkansas during the December 2000 storm.

The other difference is duration. A wind event is over in minutes and the tree either held or it did not. An ice event holds the load for as long as the temperature does, and limbs that survived the first night fail on the second. In February 2021 the Weather Service noted temperatures across many areas of the region staying below freezing from the 13th through the 18th, with some locations frozen until the 19th. Six days is a long time for a tree to carry weight it was never built for, and it is why the sound of an ice event is a slow, intermittent cracking rather than one loud night.

Which trees around Shreveport are already on the published weak list?

The LSU AgCenter's storm-tolerant tree guidance draws on University of Florida research into which species survive storms, and it names names. The species it places in the poor wind resistance column include laurel oak, southern red oak, water oak, pecan, Chinese elm, tulip poplar, spruce pine and Leyland cypress. The species it calls highly wind resistant are bald cypress, live oak and southern magnolia, with American holly and pond cypress showing good tolerance as well. Those are wind ratings rather than ice ratings, and the article says so, but weak wood and bad branch attachments do not become strong when the load turns static.

Two entries on that list deserve extra attention in Shreveport because they are everywhere here. The first is water oak, which the AgCenter describes as more weak-wooded than most oaks, prone to damage from wind, snow and ice, and poor at resisting decay, with the blunt note that trunks often rot by the time a water oak is fifty years old. The second is Bradford pear, which the same source explains breaks apart in storms because included bark in the narrow crotch angles between branches and trunk produces weak junctions. Neither observation tells you what to do about the specific tree in your yard. Both tell you where to look first.

• Rated poor for wind resistance by the LSU AgCenter: laurel oak, southern red oak, water oak, pecan, Chinese elm, tulip poplar, spruce pine, Leyland cypress.
• Rated highly wind resistant: bald cypress, live oak, southern magnolia, with American holly and pond cypress also showing good tolerance.
• Bradford pear is called out separately for included bark in narrow crotch angles, which produces weak junctions.
• Water oak carries a decay clock as well as weak wood: the AgCenter notes trunks often rot by age fifty.

What is worth doing before a freezing rain event shows up in the forecast?

Almost everything useful happens on a dry weekday, weeks ahead. Dead limbs are the first thing to come out, because deadwood has no flex left in it and it is the first material on the ground in any loading event. End weight is second: a long horizontal limb reaching over a roof or a driveway is a lever, and ice multiplies what that lever does. Reduction back to sound laterals is the fix, not topping. Late winter dormancy is the traditional window in Louisiana for structural work, which unfortunately overlaps with the ice season, so the honest version of this advice is to do it the winter before the one you are worried about.

The second half of preparation is knowing where your responsibility stops. Shreveport's Unified Development Code states plainly that nothing in its right-of-way tree section prohibits public utilities from pruning or removing trees that encroach upon electric, telephone or cable television transmission lines, or gas, sewer or water pipes. It also requires the electric utility provider to give the city a copy of the annual vegetation management plan it submits to the Louisiana Public Service Commission. Line clearance is a utility program with its own schedule. What is left for a homeowner is everything that is not touching a conductor.

• Take out deadwood first. It has no flex and it comes down first in any ice event.
• Reduce end weight on long limbs over roofs, driveways and parked cars, cutting back to sound laterals.
• Look at the base, not the crown: cavities, shelf fungus, loose bark plates and lifted soil are the findings that change the answer.
• Get the work booked on a dry week. Every crew in the parish is committed the morning after an event.
• Leave anything touching a service drop or a distribution line to the utility and report it instead.

What should nobody attempt while the ice is still on the tree?

Knocking ice off limbs with a rake or a broom is the most common instinct and one of the worst. Frozen wood is brittle, the impact adds a shock load to a branch already at its limit, and the person doing it is standing directly underneath. Ladders are worse. Nothing about a ladder works on a glazed lawn against a glazed trunk, and every winter produces injuries from exactly that combination. A limb that has broken but is hung up in the canopy is holding stored energy in a position nobody planned, and it comes down when it decides to, not when someone tugs on it.

Cutting is the other trap. A trunk or limb resting on a roof, a fence or another tree is loaded like a spring, and the wrong first cut releases that energy into whatever is nearest. Downed conductors get treated as live without exception, and so does any limb in contact with one. The useful moves during the event are small: get people and vehicles out from under loaded canopy, stay off the roof, keep the driveway clear if it is still clear, and write down what you see so the work can be scoped honestly once it thaws.

What order does the work go in once the thaw comes?

Triage first, and it is not a judgment call about which tree is prettiest. Anything resting on an occupied structure comes first, then blocked access and severed service drops, then hung-up limbs over places people walk, then yard debris. That sequence exists because the first two categories are life safety and the last one is housekeeping, and after a regional event there is not enough equipment in the parish to treat them the same. Expect honest arrival windows rather than promises during that week.

Then the rules, which surprise people. Inside Shreveport, the Unified Development Code says trees shall not be removed from a street right-of-way or other public grounds without approval from City Public Works or SPAR, and a tree removal permit is required to remove any tree thirty inches or larger in caliper. The same section makes it unlawful to top or cut back to stubs the crown of any tree in a street right-of-way or on other public grounds. There is a storm carve-out: trees severely damaged by storms or other accidental causes, where required pruning practices are impractical, are exempt from that article. The tree in your own yard is a different conversation from the one at the curb.

Debris is the last step and the one that decides whether you are still looking at a pile in March. Shreveport's bulky item program takes one pile per appointment, no larger than fifteen feet by six feet by six feet, with limbs no larger than eight inches in diameter or six feet in length, and it does not accept stumps or roots. Bossier City publishes its own limits: six feet long, eight inches in diameter, sixty-five pounds for a single item, and a stack no bigger than fifteen feet by four feet. A mature tree does not fit either program, which is what haul-off is for.

• Shreveport bulky item pickup: one pile per appointment, maximum fifteen by six by six feet, limbs no larger than eight inches in diameter or six feet long, no stumps or roots.
• Bossier City yard waste: limbs to six feet and eight inches in diameter, sixty-five pounds per item, stack no larger than fifteen feet by four feet, ten bags maximum.
• Keep piles clear of carts, mailboxes, fences, poles, parked cars, low limbs and power lines.
• If the tree was mature, plan on haul-off. Neither curbside program is built for a trunk.