2023 Hurricane and Tropical Weather


After three consecutive years of an unusually stubborn pattern, La Niña has officially ended and El Niño is on the way,......

That could mean a less active Atlantic hurricane season, a more active season in the Pacific – and another spike in global temperatures, forecasters say.

The transition to El Niño during the later summer months could have major influence over the Atlantic and Pacific hurricane seasons.

“Tropical cyclone activity in the North Atlantic is more sensitive to El Niño influences than in any other ocean basin,”.....
 

National Oceanic and Atmospheric Administration’s Climate Prediction Center issued an “El Niño watch” Thursday morning, saying the climate pattern is expected to form sooner than previously anticipated.

After La Niña ended last month, we entered “ENSO-neutral” conditions, which means neither La Niña nor El Niño is present. Those neutral conditions were expected to end at some point in the summer or early fall.

But as of Thursday, it looks as though the timeline has moved up. Forecasters said there is a 62% chance El Niño will take over between May and July. The probability that El Niño will form by fall is even higher, between 80% and 90%.
 
Always something new on the horizon......


According to a new outlook out Thursday from the University of Pennsylvania, the 2023 Atlantic hurricane season is likely to feature between 12 and 20 named storms, with a "best guess" of 16.

  • This is slightly above the 30-year average of 14 named storms.
  • The outlook took into account unusually high ocean temperatures in the tropical Atlantic, the likelihood of at least a mild to moderate El Niño event during the summer and into the fall, among other factors.
  • A separate early outlook issued last month from forecasters at Colorado State University projects a slightly below average Atlantic hurricane season, citing a potential El Niño as the main reason.
 

WHAT'S NEW THIS SEASON?
This year, the hurricane center is rolling out a new storm surge model that Brennan said “helps push real-time storm surge prediction out to 72 hours in advance of the storm" in hopes of getting life-saving information to emergency managers regarding evacuation orders.

In addition, tropical weather outlooks have been extended from five days out to seven days, providing “an additional heads up” for residents to make decisions about whether to evacuate in advance of a storm, Brennan said.
 
From the National Hurricane Center:

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Thu Jun 1 2023

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

1. Northeastern Gulf of Mexico (AL91):
Showers and thunderstorms associated with an area of low pressure
over the northeastern Gulf of Mexico have increased and become
better organized during the overnight hours. Environmental
conditions appear marginally favorable for additional development
over the next day or so, and a short-lived tropical depression or
storm could form over that time span as the system meanders over the
northeastern Gulf of Mexico. However, by this weekend environmental
conditions are forecast to become unfavorable for additional
development as the system drifts southward, likely remaining
offshore over the Gulf of Mexico. An Air Force Reserve Hurricane
Hunter aircraft is scheduled to investigate the system later today,
if necessary.

Regardless of development, locally heavy rainfall could occur over
portions of the Florida Peninsula through this weekend. Additional
information on the rainfall and flooding potential can be found in
products issued by your local National Weather Service forecast
office and Excessive Rainfall Outlooks issued by the Weather
Prediction Center.
* Formation chance through 48 hours...medium...50 percent.
* Formation chance through 7 days...medium...50 percent.

(More at link)
 
Tropical Tidbits always has good pertinent info in an understandable way.


A tropical wave (dubbed "Invest #92L") is gradually becoming better organized in the eastern Atlantic. Thunderstorm activity remains disorganized and patchy, but broad rotation has become a bit better defined. Tropical storm formation in this area is rare in June, but conditions are favorable, and models indicate a strong likelihood of tropical cyclone formation early next week. National Hurricane Center predicted odds of formation have accordingly increased to 70%. It is too early to know whether 92L will impact the eastern Caribbean islands. Any impacts would still be 6-8 days away.
 

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