Typhoon 101 Asia August 2019 Lekima.
- 2019 Aug Super Typhoon Lekima develops.
- Lekima System path Non-Retouched.
- Lekima System Path Retouch.
- What caused the northern move?.
- Overview.
- Path Project Aug 2019.
From the Asian years of 2019 to 2020 certain typhoon events within the South East Asia area then went on to defy the normal convention and move the systems further north and north west of there normal southern positioning and paths.
In todays article we will look into why this may have happened in order to understand the concepts of Deep Layer Wind Shear, The Factors that contribute to storm creation, The steering winds concepts, Monthly/Yearly variability and how they interact to determine the type and path of typhoons and storms in Asia.
We look into one typhoon system in particular in Asia in August 2019 that allows further inspection into what may allow systems to develop further north - north west from the Phllipinnes Sea and how early warning may assist the public in preperation. This system is the August 2019 Super Typhoon Lekima that affected East Asia.
Typhoon 101 Asia August 2019 Lekima.
Forming to the east of the Phillipinnes as a tropical disturbance the system drew the attention of JMA, PAGASA and the JTWC who then officially recognised the storm and then labelled this system as 10w to then be named Lekima in early August of 2019.
Above we see the natural form and power of Super Typhoon Lekima on satellite imagery in Aug 2019 not long after.
The system then underwent numerous changes over the next few days as a Disturbance/Storm/Typhoon not long after early August 2019 steered into place after this event by the North East Sub Tropical High in East Asia that sent the system North West to East Asia via the Phillipinnes Nth East Waters.
The main factors that contributed to the system developing into a Super Typhoon by the 8th of August 2019 was weak deep layer wind shear in the area the storm arrived in and ingredients favoured for Rapid System Intensification in other words in a short amount of time on 8th August the system became very powerful and also reached the designation of a Asian Tropical Cyclone with the distinctive Doughnut shape containing intense convection and surface winds up to 121mph before entering East asian authority (China/Korea).
On reaching the East Asia area near Shanghai Lekima then gradually weakened into a Typhoon at later 8th of August as the system left the care of PAGASA. On Early Morning CST 1:45am the system arrived in Wenling Zeijiang CH on the 10th of August 2019. Here the system encountered non-favourable conditions and then weakened. The system then veered north from this position weakened to arrive in the Yellow seas and Xihaian Shandong at 8:50 pm CST around the 11th Aug 2024.
As the system was tracked by various weather services in East Asia in Early August 2019 in preperation up to and over 1 million people where evacuated to shelters in the East Asia area (Shanghai Vicinity and North).
Flights/Civil events/Shipping/Rail/Schools/Mall Shopping/Beauty Saloon Visits where postponed until after the storm exited the regions as part of the East Asia National Response to the weather hazard.
Path of Lekima Non Retouch.
Original Path of Super Typhoon Lekima in early-mid August of 2019.
Path of Lekima Retouch.
Image of the Aug 2019 path of Lekima to East Asia retouched by our weather experts.
From Aug 2nd 2019 the triggering mechanism being a tropical disturbance set the stage for the stormto grow far east of the Phillipinnes that is crucial in how the storm moves northward-nth west.
Then as the system encountered weak deep layer wind shear in the West Pacific guided by now from a East Asia high system at the steering winds level conditions became ripe in the rapid intensification area east of Taiwan for the System Designated Super Typhoon Lekima by the 8th August 2019 to develop. The system here would have been super powerful.
The system then continued North West to the Shanghai area CN to become influenced there by the EAT and dispruptive wind shear on the 10th Aug 2019 and afterwards that tore the system down to a Mild Storm and then as the system travelled north to the Yellow seas became a Tropical Depression.
In this Aug 10th 2019 area near Shanghai the system had stored large amounts of rain clouds and then dumped this in the area of Shanghai causing flooding and landslides as sadly a water dam became overwhelmed and burst the water banks near Wenling Zeijiang CH.
The early morning arrival of the system led to around 200 - 500mm of town flooding that is enough to semi-submerge cars and flood lowlands. The evacuation and forecasting is vital to allow precautions. Winds where strong enough to uproot grown trees here and there probably funnelled by the street design and buildings.
Despite the deluge staff and citizens worked around the problem and lastly at Wenling city situated the centre of the storms arrival on 1:45am 10th Aug 2019 in east CN so being precise with the system landfall is very important.
Super Typhoon Lekima What causes the North Shift?.
We now look into some of the scientific reasonings as to why the Super Typhoon Lekima ended up drifting Nth West/North in east Asia that is a far departure from some other path scenarios.
Our weather scientific reasonings conclude that in August of 2019 the following factors contributed to the movement of the Super Typhoon Lekima away from the usual south east asia regions and created the heavy rain event and winds on Aug 10th 2019 in Wenling city CN.
- Weak wind shear and favourable development (Rapid Intensification) around the 8th of August 2019 east of Taiwan for Lekima allows the system to build vertically and achieve high rotational strength.
- A steep lapse rate in the area of intensification warm air parcels quickly drifting into cold mid and upper levels.
- The system path and triggering event further East in the Phillipinnes waters then usual.
- An influence of the East Asian Sub Tropical High system that steered the storm Nth West towards Shanghai CN by 10th August 2019 at 500mb from East Phillipinnes.
- The avoidance of the South East Asia Nape North Phillipinnes sea/South West Taiwan channel by the storms path.
- Possibly weakened Trade winds around the North of the Phillipinnes around Aug 4th to 7th 2019.
- Mid Latitude winds/Shear encountered by the Typhoon on reaching the area of Shanghai by 10th of Aug 2019.
- Mid Latitude 500mb winds determining the land based path of the system after Aug 10th 2019 in East Asia.
Super Typhoon Lekima Overview Aug 2019.
Citizens of East Asia prepare to evacuate early August 2019 in East Asia.
So overall in the East Asia area in August of 2019 being also a neutral ENSO summer the above factors contributed to the Development of the Super Typhoon Lekima that also moved the system into the alternate northern route into East Asia. We have ascertained what may influence the movement of the system in this time frame.
Early forecasting and continual monitoring of these systems is also now joined by Cassavaweather who are adept at classification location and weather updates of such phenomena and to issue temporal warnings at the East Asian spatial range. As such we are not consigned to areas of responsibility but tap into each system in Asia to ascertain and interpret information dynamically and to inform stakeholders accordingly on a large Spatial East Asian area that becomes prominent in Summer.
We are always on the lookout for potential sponsors-investors in the Asian area who may provide funding to continue the work we are undertaking if so please email us.
Path Project East Asia Aug 2019.
