UPDATE, 10:00 AM Monday: Snow continues to fall across the ArkLaMiss, but it has greatly decreased in intensity. Precipitation will continue through the rest of the morning and will begin to slowly wrap up through the afternoon. We will continue to track the last remain patches of snow and the dangerous cold that we will face tonight into Tuesday morning.
UPDATE, 8:00 AM Monday: Precipitation has mostly transitioned over to snow and is now starting to back off in intensity. We expect precipitation to continue for the next several hours, before diminishing after noon. Our focus will go from tracking precipitation to dangerous cold heading into tonight and Tuesday morning.
UPDATE, 6:00 AM Monday: Not much change in the last hour regarding precipitation type/intensity. We’re in the heart of this winter storm. We’ll continue to keep you updated on air and online.
UPDATE, 5:00AM Monday: Our winter storm is peaking at this time, as some of the heaviest precipitation is now moving into the ArkLaMiss. As if roads aren’t bad enough, conditions will rapidly deteriorate over the next several hours. Additional sleet/snow totals of up to 5-6″ will remain possible, especially where periods of moderate to heavy sleet/snow develop. Continue to stay updated with the latest information, and stay off the roads! (an updated radar image can be found below)
UPDATE, 3:27am Monday: Precipitation has become fairly light here in the short term across much of the ArkLaMiss, with the most widespread sleet/snow likely to set up across our area as we move into the daybreak hours. Additional sleet/snow totals of up to 5-6″ will remain possible, especially where periods of moderate to heavy sleet/snow develop. Road conditions are likely to remain poor through most of Monday.
UPDATE, 1:40am Monday: The next round of moderate to heavy sleet/snow is approaching the I-20 corridor at this hour. Expect road conditions to ice over quickly, especially now that traffic has become less frequent into the morning hours. Computer models (and a Mesoscale Discussion from the SPC) both indicate that a changeover to from sleet to snow is expected in the next few hours.
Some snowfall rates could average 1-1.5″ per hour through sunrise on Monday. Please exercise caution if you must travel, but many roads could become impassable over the next few hours.
UPDATE, 12:15am Monday: Waves of heavier sleet/freezing rain have started to cover many local roadways over the last hour. As precipitation rates increase, roads will deteriorate quickly overnight. Expect periods of sleet and freezing rain to continue, and eventually transition to snow as we move toward daybreak Monday.
WEST MONROE, La. — (2/15/2021) A Winter Storm Warning has been issued for the entire ArkLaMiss region ahead of an expected, early week winter system. A mixture of freezing rain, sleet, and snow could lead to significant accumulations for the entire region.
Waves of light precipitation will be possible through much of the weekend. Most of that precipitation would fall in the form of light freezing rain or sleet. A few snowflakes could mix in at times. Accumulations, if any, would likely remain light.
A strengthening shortwave trough will approach the region Sunday afternoon. A surface low is likely to develop across the western Gulf late Sunday night, providing overrunning moisture atop our continued cold air mass. Types of precipitation will vary from mainly snow in our northwestern counties/parishes, to freezing rain and sleet along the Mississippi River.
Regardless of precipitation type, local roadways are expected to be impacted by significant accumulations. Snow and sleet accumulations will vary depending on location, but it appears we could generally see anywhere from 3-7 inches of precipitation, with locally 8 inches or higher possible. Heaviest ice accumulations will remain south and east, with anywhere from a 0.25 to 0.5 inches possible.
Another possible winter weather scenario could develop for Wednesday and Thursday, but uncertainty remains regarding the types of precipitation much of our area will see. We will continue to update this forecast as details become more clear.
All ArkLaMiss residents should finalize preparations for sub-freezing temperatures and hazardous road conditions this weekend.