• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Weatherboy

Weatherboy Weather News, Maps, RADAR, Satellite, and Forecasts.

  • Local
  • Earth Science News
  • RADAR
  • Current Warnings
  • Satellite
  • Current Maps
  • Forecast Maps
  • Video

Severe Turbulence Alert Issued for Much of California & Nevada

by Weatherboy Team Meteorologist - January 10, 2023

A Severe Turbulence Alert has been issued for much of California and Nevada along with portions of Utah and Arizona, as depicted by the brown shaded region on this map.  Image: NWS/AWC
A Severe Turbulence Alert has been issued for much of California and Nevada along with portions of Utah and Arizona, as depicted by the brown shaded region on this map. Image: NWS/AWC



The National Weather Service’s Aviation Weather Center (AWC) has issued an alert flagging the presence of severe turbulence in the air over a large part of California and Nevada as well as parts of Utah and Arizona. An onslaught of stormy weather which continues to batter the West Coast with storm after storm in an ongoing Atmospheric River event has produced a variety of hazards. Conditions were even ripe last night for tornadic thunderstorms, which triggered the issuance of Tornado Warnings for portions of California east of San Francisco’s Bay Area. Now the same atmospheric set-up is creating severe turbulence in the air, making air travel hazardous for those flying through the warning area.

Air travel in and out of Los Angeles Airport (LAX) and Las Vegas’s Harry Reid International Airport (LAS)  are two examples of many airports being impacted by this alert.  Air travelers coming from the east into west coast cities such as San Francisco (SFO)  and San Diego (SAN) would also be impacted by this alert as well as all east-bound flights from those cities.

 

The National Weather Service's Aviation Weather Center issues SIGMETs for significant meteorological events unfolding in airspace around the U.S. Image: NWS AWC
The National Weather Service’s Aviation Weather Center issues SIGMETs for significant meteorological events unfolding in airspace around the U.S. Image: NWS AWC

 

A United 767-300, like this one photographed on an inaugral Newark-Nice, France flight, encountered severe turbulence near Cancun, Mexico on Monday. Image: United
A United 767-300, like this one photographed on an inaugural Newark-Nice, France flight, encountered severe turbulence near Cancun, Mexico last Monday. Image: United Airlines

Specifically, SIGMET ROMEO 18  has been issued through at least 2203 UTC tonight.

According to the AWC, there is occasional severe turbulence below 20,000 feet due to strong low level winds, mountain waves,  strong updrafts and downdrafts, and low-level wind shear.  Wind shear is a difference in wind speed and/or direction over a very short distance in the atmosphere. Airline pilots generally regard significant wind shear to be a horizontal change in airspeed of 30 knots (15 m/s or 34 mph) for light aircraft and 45 knots (23 m/s or 51 mph) for traditional airliners flying at flight altitude.

Flying through turbulence can be dangerous. In recent weeks, two U.S. airline flights encountered severe turbulence which landed dozens of crew and passengers into the hospital.

In the days before Christmas,  a United Airlines 767 jet encountered severe turbulence on its flight to Houston, Texas. Due to that encounter with rough air, 3 crew members and 2 passengers had to be rushed to the hospital for care upon landing.




A Hawaiian Airlines Airbus 330 aircraft, such as this one pictured, encountered extreme turbulence in the last half hour of its flight from Phoenix to Honolulu today. Image: Hawaiian Airlines
A Hawaiian Airlines Airbus 330 aircraft, such as this one pictured, encountered extreme turbulence in the last half hour of its flight from Phoenix to Honolulu today. Image: Hawaiian Airlines

The day before, on December 18 , Hawaiian Airlines Flight 35 flew through severe turbulence before landing at Honolulu International Airport after originating in Phoenix, Arizona. A Mass Casualty Emergency Event was declared, with dozens of passengers needing care for injuries sustained in the violent ride. Officials with Honolulu Emergency Medical Services and American Medical Response say the flight encountered the extreme turbulence about 30 minutes prior to landing; they treated 36 patients at the airport. 20 patients, ranging from a 14-month old toddler to older adults, were transported to hospitals near the airport, some with serious injuries.

Known as a SIGMET, short for Significant Meteorological Information, the severe weather advisory issued by the AWC contains weather-related information concerning the safety of all aircraft passing through a specific zone. Sometimes AIRMETs are issued too; an AIRMET consists of turbulence, visibility, and icing-related warnings that are less severe than those in a SIGMET.

Primary Sidebar

Sponsored Ad

Search

Latest News

  • Tropical Storm Watches Issued for East Coast as Tropical Depression Forms
  • System to Impact Southeast U.S. This Weekend Says National Hurricane Center
  • Hurricane Center Says East Coast System Likely to Develop
  • National Hurricane Center Increases Odds of Cyclone Development Near Florida
  • Severe Weather Outbreak Likely in Mid Atlantic
  • July to Start with Severe Weather Event in New Jersey, Pennsylvania, Delaware, & Maryland
  • Tropical Storm Barry Forms; Additional Storm Possible Near Florida
  • Severe Weather Threat & Tornado Risk Returns to Northeast Today
About | Careers | Contact | Contests
Terms | Privacy | Ad Choices
Weatherboy is a (R) Registered Trademark of isarithm LLC, All Rights Reserved.
All content herein is Copyright by Isarithm LLC 1997-2022