Louisiana
A little water makes a lot of snow. Why future snow melt won’t lead to floods.
If you’ve been a weather nerd and checking the National Weather Service’s hourly precipitation tallies, you might have noticed something appears to be off with the measurements of Tuesday’s snowstorm.
Precipitation measurements are in the tenths and hundreds of an inch, though widespread measurements of the blanket of snow falling across the state are in the several inches.
Baton Rouge, for instance, had a reported 6 inches of snow by midday Tuesday, though hourly measurements from Baton Rouge Metropolitan Airport only measured 0.27 inches of precipitation.
What’s the deal?
Vincent “Vinny” Brown, an LSU climatologist, said those National Weather Service precipitation measurements are in liquid amounts, not snow accumulation totals.
The ice crystals that make up snow take up more volume than liquid water, but exactly what that ratio is in any given snowstorm can involve a number of factors.
One old rule of thumb is 10-to-1, or 10 inches of snow for every 1 inch of liquid, but forecasters have developed other ways to predict snow accumulations.
The Kuchera snow ratio, for example, is a widely used statistical method that relies on the warmest temperatures in the air column to try to estimate snowfall.
But it can be a difficult task. According to the National Weather Service, factors such as the amount of ice in a snow cloud, the types of snowflakes being formed, how warm it is between the snow cloud and the surface of the Earth, and windiness can all increase or decrease the amount of snow hitting the ground.
Deep cold can push the snow-to-water ratio to as much as 20-to-1, the Weather Service says. Some academic papers published by the American Meteorological Society say that ratio can range from 3-to-1 to 100-to-1.
Phil Grigsby, a forecaster with the National Weather Service in Slidell, said published snowfall tallies are measurements of actual accumulations on the ground or other surfaces that the service’s network of observers are reporting.
“Those are actual people going out and measuring them … on patio tables and decks and things like that,” he said.
He added that this difference between snow volume and water volume means the eventual melting of south Louisiana’s coating of snow is unlikely to have much of an impact on local waterways.
Grigsby added that the snow falling across south Louisiana is on the dry side and that means the snow-to-water ratio is even wider than the typical rule of thumb.
That means even less water will ultimately run off once the snow melts.
“This won’t cause any flooding issues at all,” Grigsby said.
Louisiana
Central Louisiana residents delight in a rare snow day Tuesday
Snow is not something that you see very often in Central Louisiana.
Central Louisiana woke up to a blanket of snow, and several Pineville residents were out Tuesday morning enjoying it while it lasted.
“We love it,” said Nikita Rackley, who was outside on Myrtle Street with Jayden Deslatte, 10, and his uncle Wesley Deslatte enjoying the rare snowfall.
Chris Jasper, 20, and Corneilous Hughes, 12, donned a pair of Louisiana mittens (socks) on their hands as they pelted each other with snowballs on Barrett Street. Jasper said the socks did help keep their hands warm a little bit.
“I hadn’t seen snow in years,” Jasper said.
It was the first time Hughes has seen snow in Louisiana but has seen it in Houston. He expected it to snow here on Christmas.
“It’s a lot of fun,” said Jaden Wells, a Louisiana Christian University freshman psychology major from Mandeville.
The campus was closed Tuesday due to the weather, but Wells and Noah Nava, a junior education major from Newton, Texas, were outside throwing snowballs at each other and attempting to build a snowman.
The snow was not sticky enough for the snowman, so they ended up with a small mound.
“It’s perfect for snowballs though,” said Nava, showing one he just made.
“We don’t get this a lot so you’ve got to get outside and enjoy it as much as you can,” said Wells.
The National Weather Service in Lake Charles issued a Winter Storm Warning from midnight Tuesday until midnight Wednesday. A low of 14 degrees is expected for Tuesday night. Wednesday’s high is expected to be 30, with a low of 19.
Louisiana
See first photos of snowfall in Baton Rouge, from the Capitol to LSU Tiger stadium
Snow began to blanket Baton Rouge around 4 a.m. Tuesday as a winter storm moves over Louisiana.
Potentially historic snowfall is in the forecast, with up to 7 inches or more possible in Louisiana’s capital city today.
Here’s a first look at photos and videos of snowfall from around the city, including at the Louisiana State Capitol building and LSU Tiger Stadium.
Louisiana
Shoppers hurry for last-minute groceries, supplies before Louisiana’s winter storm
METAIRIE, La. (WVUE) — On the day before a forecasted winter storm is expected to hit Southeast Louisiana, the most dominant grocery chain in the region saw shoppers descending on its various locations.
Karah Smith was shopping at the Rouses Supermarket on Airline Highway in Metairie. It was her second visit to the store in recent days.
“I was picking up for a mix of things, like we would normally cook for dinner. But I also wanted to have some non-perishable food for backup, if we lose power,” she said.
For many in Louisiana, this week will be the first time they’ve seen snow in years, for some maybe ever. That’ll certainly be the case for Smith’s daughter. She’s only 2 months old.
“I’m excited for her,” Smith said. “We’ll have pictures of her in her little snowsuit, outside hopefully.”
Marc Ardoin manages the Rouses on Airline Highway. He said workers stayed busy keeping shelves full. It’s a drill they have down pat from similar years of hurricane preparations.
“There’s definitely the water and those kinds of items we buy during hurricane season, but people are looking for a lot more cold weather items,” Ardoin said. “So, you’re seeing stew meat, and that kind of stuff. People are getting what they need to make gumbo.”
Former actor and radio personality John “Spud” McConnell was one of the customers near the freezer aisle. He said he’s unsure what the winter storm will bring, but his household will be fed.
“I got a couple of big Boston butts and I’m going to put them in the oven tomorrow when it’s really cold,” he said. “I’m going to bake them bad boys all day and I’m going to be eating pig like the pig that I am.”
Preparing for wintry weather also requires warm gear.
“People have definitely been coming out and stocking up on gloves, hats for the kids, anything that’s going to keep them warm,” said Bubba Henry, a sales associate at Massey’s Outfitters in Mid-City.
The store on Carrollton Avenue had a shipment of gloves arriving a few hours before closing time Monday. Henry expected the gloves to move quickly. He advised anyone planning to be out in the winter conditions to dress in layers.
“If they have base layers, that would be great,” Henry said. “If they have athletic wear similar to when they go play soccer — that stretchy spandex — something like that.”
Even for customers who’ve spent time in cold climates, there’s no such thing as being overly prepared. Arturo Peal visited Massey’s Outfitters on Monday for one essential. After that, he felt ready for the forecasted freeze.
“Oh yeah, the only thing I needed was wool socks, because I have no idea where my wool socks are. I haven’t seen them. They’re buried somewhere in storage,” Peal said.
Most businesses, schools and government offices will be closed Tuesday.
While Southeast Louisiana is unfamiliar with winter storms, the region’s next collective step resembles what many communities take during hurricane season: Waiting for the storm to pass.
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