Home : Media : News : News Article View
NEWS | Dec. 15, 2017

Joint Typhoon Warning Center Increases Warnings and Improves Graphics

By Lieutenant Caitlin Fine Joint Typhoon Warning Center

The first warning on a Southern Hemisphere tropical cyclone was issued Nov. 29, 2017 by the Joint Typhoon Warning Center (JTWC) in Pearl Harbor, Hawaii. Dahlia (Tropical Storm 01S) was the first Southern Hemisphere system where warnings were issued every six hours without higher authority request.

Previously, manpower constraints limited updating warnings to every 12 hours but with the training of two more typhoon duty forecasters and innovative internal business practices, JTWC is now capable of six-hourly warnings regardless of their location in the ocean.

"This periodicity change of warnings specifically enables the U.S. Pacific Command and its components greater fidelity of information on systems threatening their assets, enabling better informed decisions," said Cmdr. Jillene Bushnell, the commanding officer of JTWC. "The previous gap between warnings would regularly result in larger changes in tropical cyclone fix, intensity and forecast track based on a longer interval between forecasts in a chaotic environment. Matching our forecast accuracy and periodicity throughout our assigned Pacific and Indian Ocean regions is extremely important to me."

JTWC releases warnings on tropical cyclones above 35 knot (40 mph) wind speeds in the Pacific and Indian Oceans. Products include a graphic of the tropical cyclone depicting the historical and predicted track, wind speed, and the radius of gale (34 knot), destructive (50 knot), and typhoon (64 knot) strength winds. In addition to the graphic, the products include an explanation of the current environmental situation and forecast philosophy; a text product listing the track, wind speed, and wind radii information in six hour intervals; a satellite image showing the tropical cyclone's center position at the time of the warning; and a Google Earth overlay.

During the 2016 season, JTWC warned on 20 tropical cyclones in the Southern Hemisphere. During February 2016, the strongest Southern Hemisphere tropical cyclone on record, Severe Tropical Cyclone Winston, made landfall on the islands of Fiji with winds estimated up to 185 mph by JTWC. Winston caused almost $500 million in damage and 44 deaths in Fiji, and launched a multinational relief response to help 350,000 affected residents. Upon request, JTWC issued six-hourly warnings for Tropical Cyclone Winston as it approached the islands of Fiji, providing more detailed information that improved preparation, emergency management and follow-on humanitarian assistance and disaster relief operations.

Additionally, starting in 2018 JTWC will update its wind radii colors and graphic color scheme, change the historical track character to dashed and add clarifying information in the legend. The intent is to improve the user experience and first-use understanding. The modernized warning will be issued for tropical cyclones above 25 knots in the western North Pacific Ocean and above 34 knots in the Indian and southern Pacific Oceans.

JTWC provides tropical cyclone reconnaissance, forecast, safety warning and decision support services for operational advantage to U.S. government agencies operating in the Pacific and Indian Oceans.

JTWC also provides tsunami advisory information and recommendations to shore installations and afloat units, as well as maritime impact forecast and decision support services to U.S. Pacific Command subordinate commands, as directed.

JTWC is jointly staffed by U.S. Navy and Air Force personnel and falls under the operational control of Commander, Task Force 80.7-Commander, Naval Meteorology and Oceanography Command. U.S. Air Force personnel are sourced to JTWC by the 17th Operational Weather Squadron, a subordinate squadron of the 557th Weather Wing. 
CONNECT WITH USINDOPACOM
Facebook

Like Us
Twitter
324,276
Follow Us

ENGAGE & CONNECT MORE WITH PACOM

                                                 

IN THE USINDOPACOM NEWS
Coast Guard Cutter Steadfast Returns Home After 55-day Counter Narcotics Patrol
The crew of U.S. Coast Guard Cutter Steadfast takes a photograph in Manzanillo, Mexico, with two men they rescued during a deployment in the Eastern Pacific Ocean June 10, 2022. The men were lost at sea for 23 days after their vessel was beset by weather. (U.S. Coast Guard photo by Seaman Brad O'Brien)
June 24, 2022 - ASTORIA, Ore. — The United States Coast Guard Cutter Steadfast (WMEC 623) returned to homeport Saturday following a 55-day counter narcotics deployment to the Eastern Pacific Ocean.The 210-foot medium endurance cutter and...

Army Alaska National Guard, HHC 297th Regional Support Group Soldiers Contribute To Role Playing Operations During Khaan Quest 2022
On June 20, 2022, Khan Quest 2022 ended with the official closing ceremony. Over the past two weeks Mongolian Armed Forces (MAF) hosted 15 nations in this 18th iteration of the exercise. By participating in Khaan Quest, nations were able to showcase their resolve in peacekeeping missions around the world.

Soldiers, Spc. Hunter Mains and Spc. Kyle Johnson with the Army Alaska National Guard, Headquarters and Headquarters Company, 297th Regional Support Group contributed a major role in CPX operations which had them role play in several different scenarios. 

Both Soldiers also participated at the end of the exercise mock press conference. The press conference is designed to prepare peacekeepers and military leaders for questions that may be asked of them during stressful situations. Johnson and Mains roleplayed as journalists asking the questions. 

Pictured here the CPX participants listen to the news conference brief given by the military leadership in a role playing scenerio.
June 23, 2022 - Mongolia -- On June 20, 2022, Khan Quest 2022 ended with the official closing ceremony. Over the past two weeks Mongolian Armed Forces (MAF) hosted 15 nations in this 18th iteration of the exercise. By participating in Khaan...

Juneteenth Celebrated by Department of the Air Force Leaders in Pentagon’s First Official Ceremony
Air Force Chief of Staff Gen. CQ Brown, Jr., speaks to a crowd of attendees during a Juneteenth Celebration at the Pentagon in Arlington, Va., June 21, 2022. Brown’s message highlighted the importance of promoting an inclusive culture for all Airmen and Guardians to be able to serve to their fullest potential. (U.S. Air Force photo by Staff Sgt. Elora J. McCutcheon)
June 22, 2022 - ARLINGTON, Va. (AFNS) -- Hundreds gathered to celebrate the Juneteenth holiday through song, dance, poetry and storytelling at the first official Juneteenth ceremony held at the Pentagon June 21.  Attended by...

Pacific Partnership Kicks Off in Vietnam
PHU YEN, VIETNAM (June 20, 2022) – Captain Hank Kim, Pacific Partnership 2022 mission commander, left, delivers remarks during the Pacific Partnership Vietnam opening ceremony. Now in its 17th year, Pacific Partnership is the largest annual multinational humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Pacific. (U.S. Navy photo by Mass Communication Specialist 2nd Class Brandie Nuzzi)
June 21, 2022 - PHU YEN, Vietnam -- Now in its 17th year, Pacific Partnership is the largest annual multinational humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Pacific. In Vietnam, the Pacific...

SECNAV Visits Innovative Forward Deployed Marines and Sailors with MRF-D 22
U.S. Secretary of the Navy Carlos Del Toro greets U.S. Marine Corps Col. Christopher Steele, the commanding officer of Marine Rotational Force-Darwin (MRF-D) 22, during a visit with MRF-D 22 at Royal Australian Air Force Base Darwin, June 18, 2022. Secretary Del Toro visited Marines and Sailors with MRF-D 22 and Australian Defence Force personnel as part of the Indo-Pacific battlefield circulation. (U.S. Marine Corps photo by Cpl. Emeline Molla)
June 21, 2022 - DARWIN, AUSTRALIA. – The Honorable Carlos Del Toro, the 78th Secretary of the Navy, visited Marines and Sailors with the Marine Rotational Force-Darwin (MRF-D) on June 18.As part of a battlefield circulation tour in the...