Weather updates: Hurricane warning, thunderstorm for New Orleans; see predictions

Update, 8:10 p.m.: As heavy rain moved toward New Orleans, a hurricane warning was issued for Orleans Parish, and a severe thunderstorm warning was in effect for Orleans and parts of Jefferson parishes.

Forecasters said a hurricane warning would last until 8:30 p.m. in parts of East New Orleans. The metro area will be under a thunderstorm warning until 8:45 p.m.

Metairie, Kenner, and River Ridge are also under flash flood warning until 11:30 p.m.

The NWS said wind gusts in New Orleans reached 70 mph.

Update, 7:30 p.m.: A flash flood warning has been issued for Hammond, Mandeville and Covington until 10:30 p.m., according to the NWS.

A hurricane warning was also issued for parts of North Shore, including Mandeville and Abita Springs until 8 p.m., and Lacombe until 8:15 p.m.

In Baton Rouge, a flood warning was lifted around the same time.

Update, 6:45 p.m.: An hour of hurricane was canceled across much of southeastern Louisiana for eastern Baton Rouge and other nearby parishes. The clock is still in effect in the New Orleans area.

Around the same time, severe weather reached the North Shore, and officials issued a severe thunderstorm warning for Mandeville and Covington.

Power outage numbers dropped slightly to 27,000 customers, and the most outages were reported in East Baton Rouge Parish at 6,593 customers.

Update, 5:20 p.m.: Baton Rouge, Central, Zachary and some nearby parishes are under severe thunderstorm warning until 6 p.m., according to the NWS.

The weather agency reported winds of up to 60 mph in the area. Affected sites include: Baton Rouge, Zachary, Baker, Denham Springs, Port Allen, Clinton, Greensburg, Addis, Brosley, Slaughter, Montpellier, Meridel, Watson, Darlington, Pride, Brownfields, Greenwell Spring, Islirouge and Patton Airport.

As of 5:30 p.m., more than 39,000 Entergy customers were without power. The most power outages were reported in Jefferson Parish at 7,640.

A flash flood warning was also issued about 40 minutes after heavy rain reached Baton Rouge. The warning will remain in effect until 8 p.m., according to the NWS.

Update, 3:30 p.m.: According to Entergy’s Outage Map, more than 28,000 of its customers statewide have been without power. The majority of these customers were in East Baton Rouge Parish, with 4058 in the dark.

Update, 1:45 p.m.: The tornado watch is in effect throughout much of southeast Louisiana, including the Baton Rouge and New Orleans metros, until 9 p.m. Wednesday.

Another streak of thunderstorms is expected to hit southern Louisiana this Wednesday, just a week after the EF-3 hurricane made landfall in New Orleans and wreaked havoc on the town of Arabe in St. Bernard Parish.

Megan Williams, a meteorologist with the National Weather Service in Slidell, said new storm pattern winds would pose the biggest threat.

“The winds now look like they could be over 70 mph inside this line, which will pass on Wednesday,” Williams said. “There will be a chance of a hurricane or two, but mostly that will be included within the line.”

Besides strong storms within the system, a tweet from the NWS said residents should be wary Tuesday through Thursday of smaller winds of 30 to 40 mph and sustained winds of 25 to 30 mph.

A high wind warning was in effect Wednesday through 9 p.m., and a wind warning will follow until 1 a.m. Thursday in southeastern Louisiana and southern Mississippi.

Strong EF-2 tornadoes are also possible, the threat level increased on Tuesday. Baton Rouge is at moderate risk of severe weather threats, while New Orleans is just below that at an improved level as of Tuesday afternoon.

Like last week’s storm system, this week’s storms will approach Louisiana from the west. However, it will not originate from the Pacific Northwest like last week’s system; Rather, this storm will come to us from the Midwest and the High Plains.

Parts of the state north of the I-10/I-12 corridor are expected to get the worst effects of the system. New Orleans and Baton Rouge have a “slight” risk of severe weather, which means residents should expect scattered severe thunderstorms and high wind speeds.

During a briefing Wednesday morning, an NWS meteorologist said the Baton Rouge area will likely see severe weather effects between noon and 4 p.m. The storm system will then move into the New Orleans area sometime between 4 and 8 p.m. and then out of the state toward the Mississippi Gulf coast during the middle of the night.

Expected weather in Baton Rouge:

  • Tornado watch valid until 9 pm Wednesday
  • Wind alert in effect from 8am to 9pm on Wednesday
  • Wednesday’s temperature: the highest is 82 degrees, the lowest is 55 degrees
  • Thunderstorms likely to start in the middle of the afternoon and move east by 5 p.m.
  • Wind blows up to 50 miles per hour
  • Precipitation up to 1.5 inches, with higher amounts likely
  • Potential severe weather threats include hurricanes, hail and flooding in areas with poor drainage
  • Weather Thursday: 74°C, sunny, 5 to 15 mph winds with higher gusts potential, 50° low.

Expected weather in New Orleans:

  • Tornado watch valid until 9 pm Wednesday
  • Wind alert in effect from 8am to 9pm on Wednesday
  • Wednesday’s temperature: the highest is 82 degrees, the lowest is 60 degrees
  • Thunderstorms are most likely to start between 4 and 8 p.m.; Storms should wrap up after midnight on Wednesday
  • Wind blows up to 50 miles per hour
  • Up to an inch of rain, with higher amounts possible locally
  • Potential severe climate threats include hurricanes and major hail
  • Weather Thursday: 75°C Mostly sunny, 10-15mph winds with higher gusts potential, low 57°C.

Williams recommends that residents in the path of the storm system have multiple ways to receive weather warnings and have a plan for where to go if a severe weather warning is issued in their area.

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