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NWS New Orleans Profile picture
@NWSNewOrleans
Aug 28, 2021 • 6 tweets • 3 min read • Read on X
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We continue to monitor Ida as it approaches, expected to make landfall Sunday afternoon/evening. A hurricane Warning is in effect for areas of southern/central LA. A Tropical Storm Warning is in effect for parts of coastal/southern MS and western LA. #LAwx #MSwx
We want to continue to stress that this WILL be a DANGEROUS and LIFE-THREATENING storm. There WILL be significant wind damage. Prepare for widespread power outages and tree/structural damage in these purple/red areas on the graphic below.
Hurricane Ida is expected to deliver LIFE-THREATENING Flash Flooding for portions of Louisiana and coastal MS. 8-16 inches of rainfall is possible and a Flash Flood Watch is in effect due to this.
DEVASTATING storm surge is expected in purple highlighted areas in the graphic below. EXTENSIVE storm surge in red/orange areas. A Storm Surge Warning is in effect for southern LA and coastal MS. A Storm Surge Watch is in effect for parts of the AL border and western LA coast.
We also have the potential to see isolated tornadoes across southern/eastern Louisiana and coastal Mississippi.
Please finish up all preparations by SUNSET this evening. Tropical storm force winds could arrive as early as overnight. If you are leaving you need to do so TODAY. If you wait until Sunday morning it will be too late.

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More from @NWSNewOrleans

NWS New Orleans Profile picture
Jan 22
Now that the winter storm has passed, the big story today will be the lingering impacts (ice covered roads) and extremely cold temperatures!

Please, follow along as we break it all down with what to expect today thru the weekend...#lawx #mswx

(1/6)
⚠️ Today: Ice covered roadways from yesterday's snow will continue to impact travel, as temps will struggle to reach above freezing for most areas. Travel is NOT RECOMMENDED but if you must travel, check road conditions and plan accordingly! #lawx #mswx (2/6) Stay off the roads today! For more tips, visit www.ready.gov
➡️ Outside of icy roads, temperatures are downright FRIGID this morning with many areas in the teens (and yes, even a few single digits!) PLEASE dress accordingly if you go outside for ANY duration. These temperatures are NOT what we are used to!! #lawx #mswx (3/6) Prepare for Extreme Cold today! Whether it's the wind chill or air temperature. Extreme cold is dangerous! Take it seriously!
Read 6 tweets
NWS New Orleans Profile picture
Jan 20
(1/4)⚠️ 5PM Update:

We still have a Winter Storm Warning across all of the area for tonight through Tuesday Evening. Roads will be dangerous, so consider delaying travel tomorrow, if possible. If you do have to travel, use extreme caution. Prepare for Winter Weather. Winter Storm Warning and Winter Weather Advisory in effect Late tomorrow night through Tuesday evening. SAFETY: Monitor the latest forecasts for updates. Consider delaying all travel. Use extreme caution if travel is absolutely necessary.
(2/4)🥶 There now is also an Extreme Cold Warning for the entire area Tuesday night and Wednesday morning for wind chills ranging from 8-15 degrees.

Make sure to protect the 4 P's: people, pets, plants, and pipes! A graphic from the National Weather Service New Orleans/Baton Rouge, LA, titled "Dangerous Cold Tomorrow Night!" highlighting an Extreme Cold Warning for southeastern Louisiana and southern Mississippi. The map shows affected areas in dark blue, including cities such as McComb, Baton Rouge, Hammond, Slidell, New Orleans, and Gulfport. Key information includes the warning period from 6 PM Tuesday to 9 AM Wednesday. The dangers of extreme cold, such as hypothermia and ruptured water pipes, are emphasized. Safety tips include checking on vulnerable individuals, preventing water pipes...
(3/4)❄️In terms of snowfall, amounts have increased and shifted southward slightly today with widespread amounts of 5-7 inches across the I-10/12 corridor.

Due to the cold temps, even during the day Wednesday, the snow might be slow to melt off, making travel difficult. A graphic from the National Weather Service New Orleans/Baton Rouge, LA, titled "Most Likely Snow Totals," showing forecasted snow accumulation for southeastern Louisiana and southern Mississippi. The map displays snowfall estimates ranging from 2-3 inches in McComb to 5-6 inches in areas like Baton Rouge, Hammond, Slidell, and New Orleans. Heavy snow is expected late Monday night through Tuesday evening, with slow melting due to temperatures remaining near freezing on Wednesday. Hazardous travel conditions could persist into Thursday in some areas.
Read 4 tweets
NWS New Orleans Profile picture
Jan 19
A Winter Storm Warning in now in effect for SE Louisiana as well as SW &coastal Mississippi.

Moderate to major impacts are expected & travel should be avoided if at all possible Tuesday & Wednesday as snow will likely not have a chance to melt during the day Wednesday.

(1/4) Prepare for Winter Weather. Winter Storm Warning Late tomorrow night through Tuesday evening. SAFETY: Monitor the latest forecasts for updates. Consider delaying all travel. Use extreme caution if travel is absolutely necessary.
Heavy snow is forecast to affect the area, with 4-6" of snow for areas generally north of I-10/12 and 1-3" south of I-10/12, including the New Orleans metro area.

The heaviest snow will fall during the day Tuesday and hazardous travel conditions are expected.

(2/4) Heavy snow forecast indicating most likely snow amounts of 4-6 inches for areas north of interstate 10 and 12 and 1-3 inches for areas south of interstate 10 and 12. A few places could see totals as high as 8-12 inches.
The bulk of the precipitation should fall as snow, but a light glaze of ice (less than one tenth of an inch) is also forecast for areas along and south of the interstate corridor. There is a low chance (10%) of totals approaching one quarter inch for some areas SW of NOLA.

(3/4) Ice forecast indicating less than one tenth inch of ice for areas along and south of the interstate corridor with a low chance (10 percent) of seeing up to one quarter inch for some areas southwest of the new orleans metro area.
Read 4 tweets
NWS New Orleans Profile picture
Jan 18
Here's the latest on the upcoming winter storm. Cold weather impacts will be greatest Monday through Thursday, but hazardous travel is also expected Tuesday due to wintry precipitation.

(1/ ) Timeline of winter weather impacts across southeastern Louisiana and southern Mississippi Sunday through Friday. The main impacts are Monday through Thursday with the greatest impacts on Tuesday due to snow.
With the cold temperatures and wind chills, a Cold Weather Advisory is in effect for the entire area tomorrow night and then again Monday night through Tuesday. Extreme Cold Watches/Warnings will likely be needed for Tues/Wed.

(2/ ) Cold weather advisory graphic indicating wind chills of 10-15 degrees in northern areas and 15-25 degrees in southern areas Sunday night and again Monday night through Tuesday. Safety: Wear appropriate clothing. Keep pets indoors as much as possible. Ensure portable heaters are used correctly.
Focusing on the wintry precipitation, confidence continues to increase that there will be at least moderate impacts from winter weather. A Winter Storm Watch remains in effect with snow totals of 3-6" of snow forecast for northern areas & 1-3" forecast in southern areas.

(3/ ) Winter Storm Watch graphic indicating hazardous winter precipitation late Monday night through Tuesday evening. Safety: Monitor the latest forecasts for updates. Consider delaying all travel. Use extreme caution if travel is absolutely necessary.
Read 5 tweets
NWS New Orleans Profile picture
Jan 17
⚠️👉 An active weather pattern is on the horizon, with major to extreme impacts expected in the days ahead. Here's a day-by-day breakdown, starting with this evening - Sat:

Scattered rain/storm chances tonight thru Saturday. Warm highs Saturday in the 70's. #lawx #mswx (1/7) Frigid Cold Weather on the Way! Overview of What to Expect Next Week + Winter Weather Potential? Saturday, Periods of scattered showers and storms. Some heavy. Sunday, Colder & Breezy! Wind chills 20-30F in the AM. Monday, Hard freeze areas along and north of I-10/12. AM wind chills upper 10s to 20s. Tuesday, Another hard freeze – same areas. Frigid Wind Chills! Snow for most areas? Wednesday, Hard Freeze – same areas. Frigid Wind Chills! Lingering impacts from snow! Thursday, Hard Freeze: I-10/12 N. Frigid Wind Chills! Friday, Near/around freezing temps AM. Sunshine returns?
A strong, arctic front blows through Sat PM/Sun AM. It'll be chilly & sunny Sunday but dry. Then, our first in a series of extremely cold nights arrives Sun night/Monday morning. #lawx #mswx (2/7) Widespread Freeze/Hard Freeze Monday Morning. Frigid Temperatures Monday Morning. Temperatures in the low to mid 20’s for a large majority of the area. Now is the time to Prepare. Have in plan a place for the elderly and those who don’t have reliable access to warm shelter. Plan to bring animals in or prepare a shelter for them to stay warm. Make sure there is a way to get fresh unfrozen water. Check and protect pipes. Replace old and damaged insulation if needed.
Forecast duration of below freezing temperatures will range from 10 to 17 hours for northern areas, to 3 to 10 hours for southern areas Monday morning. Dangerously cold minimum wind chills are expected to be in the teens for all areas Monday morning.
🥶 Monday: Will be frigid! Highs in the upper 30's with even colder wind chills. Clouds increase late. Then, another hard freeze Monday night into Tuesday morning will be likely for a large majority of the area. #lawx #mswx (3/7) Widespread Freeze/Hard Freeze Tuesday Morning. Frigid Temperatures Tuesday Morning. Temperatures in the low to mid 20’s for a large majority of the area. Now is the time to Prepare. Have in plan a place for the elderly and those who don’t have reliable access to warm shelter. Plan to bring animals in or prepare a shelter for them to stay warm. Make sure there is a way to get fresh unfrozen water. Check and protect pipes. Replace old and damaged insulation if needed.
Forecast duration of below freezing temperatures will range from 16 to 24 hours for northern areas, to 8 to 13 hours for southern areas Tuesday morning. Dangerously cold minimum wind chills are expected to be in the teens for all areas Tuesday morning.
Read 7 tweets
NWS New Orleans Profile picture
Jan 17
👉 There's plenty to discuss in the in the medium-to-extended forecast time range for the next 3-7 days. Let’s break it down day by day in this 🧵 thread with everything we know (1/7)... #lawx #mswx
But first, looking at the forecast Friday through Saturday

Overall nice Friday! Rain/storm chances increase Fri night. Rain could be heavy at times. Storms continue Saturday mainly for areas along/south of I-10/12 then clears out Saturday night, turning colder! #lawx #mswx (2/7) Friday & Saturday Forecast. Mainly mild Friday with no rain. Rain chances increase Friday Night with lows in the 50’s. Rain and storm chances continue Saturday mainly for central/southern areas with highs in the upper 60’s to low 70’s. Clearing out and much colder Saturday night with lows in the low to mid 30’s for northern areas Sunday morning, 40’s southern areas.
A strong arctic cold front will swing through the area late Sat/early Sunday, delivering frigid temperatures late this weekend into early/middle next week 🥶

The first very cold morning will be Monday morning, with dangerously cold temps/wind chills expected! #lawx #mswx (3/7) Widespread Freeze/Hard Freeze Monday Morning. Frigid Temperatures Monday Morning. Temperatures in the low to mid 20’s for a large majority of the area. Now is the Time to Prepare. Have in plan a place for the elderly and those who don’t have reliable access to warm shelter. Plan to bring animals in or prepare a shelter for them to stay warm. Make sure there is a way to get fresh unfrozen water. Check and protect pipes. Replace old and damaged insulation if needed.
Forecast duration of below freezing temperatures will range from 10 to 17 hours for northern areas, to 3 to 10 hours for southern areas Monday morning. Dangerously cold minimum wind chills are expected to be in the teens for all areas Monday morning.
Read 7 tweets

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