Tropical Depression Josie

{{Infobox weather event

| name = Tropical Depression 13W (Josie)

| image = 13W 2018-07-21 0531Z.jpg

| caption = 13W impacting Luzon on July 21

| formed = July 20, 2018

| dissipated = July 23, 2018

}}{{Infobox weather event/JMA

| winds = 30

| pressure = 996

}}{{Infobox weather event/JTWC

| winds = 35

| pressure = 995

}}{{Infobox weather event/Effects

| year = 2018

| fatalities = 16 total

| areas = Philippines, Taiwan

| damage = 87400000

| ibtracs = 2018202N18116

}}{{Infobox weather event/Footer

| season = 2018 Pacific typhoon season

}}

Tropical Depression Josie was a weak tropical system that impacted the Philippine archipelago of Luzon in late-July 2018, bringing widespread flooding. The tropical depression was classified in the South China Sea on July 20, and steadily moved eastward while gradually intensifying. The storm reached its peak intensity of 1-minute sustained winds of 65 km/h (40 mph) while nearing the northern tip of the Ilocos Region. By July 22, the system moved northward and rapidly weakened. The system was last noted on July 23 to the northeast of Taiwan.

While a relatively weak system, Josie was known for actively enhancing the southwest monsoon in Luzon, which was already prevailing since the passages of Son-tinh and Ampil just a few days prior. The monsoon rains, along with Josie, resulted in ₱4.66 billion (US$87.4 million) worth of damages in the country, while also killing a total of 16 people. Despite the high economic toll, the name Josie was not retired from the local naming list.

Meteorological history

On 06:00 UTC of July 20, the Joint Typhoon Warning Center (JTWC) began tracking a tropical disturbance that had developed about 402 km (250 mi) south-south east of Hong Kong.{{Cite web |url=http://gwydir.demon.co.uk/advisories/ABPW10-PGTW_201807200600.htm |title=Archived copy |access-date=2018-07-20 |archive-date=2024-05-22 |archive-url=https://archive.today/20240522205128/https://www.webcitation.org/713RBQEVQ?url=http://gwydir.demon.co.uk/advisories/ABPW10-PGTW_201807200600.htm |url-status=dead }} Operationally, the Japan Meteorological Agency (JMA) classified the system as a weak tropical depression around that same time,{{Cite web |url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201807200600.htm |title=Archived copy |access-date=2018-07-21 |archive-date=2024-05-22 |archive-url=https://archive.today/20240522192249/https://www.webcitation.org/714rn4WfQ?url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201807200600.htm |url-status=live }} however, post-analysis showed that the system strengthened into a weak tropical depression six hours later.{{cite web|title=Digital Typhoon: List of weather charts on July 20, 2018 (Fri)|url=http://agora.ex.nii.ac.jp/cgi-bin/weather-chart/search_day.pl?lang=en&year=2018&month=7&day=20|publisher=Digital Typhoon|date=March 2019|access-date=July 1, 2020|archive-date=August 23, 2019|archive-url=https://web.archive.org/web/20190823152633/http://agora.ex.nii.ac.jp/cgi-bin/weather-chart/search_day.pl?lang=en&year=2018&month=7&day=20|url-status=live}} Later that day, the JTWC issued a Tropical Cyclone Formation Alert after the system gradually organised.{{Cite web |url=http://gwydir.demon.co.uk/advisories/WTPN21-PGTW_201807201630.htm |title=Archived copy |access-date=2018-07-21 |archive-date=2024-05-22 |archive-url=https://archive.today/20240522205450/https://www.webcitation.org/714tCT3U1?url=http://gwydir.demon.co.uk/advisories/WTPN21-PGTW_201807201630.htm |url-status=live }} Animated enhanced infrared satellite imagery showed that the system had flaring convection wrapping into its Low-level circulation center.{{cite web|title=Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning Nr 01|url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807202100.htm|date=July 20, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205408/https://www.webcitation.org/714sNXJV5?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807202100.htm|url-status=dead}} The storm's location over favourable environments with low wind shear and warm sea-surface temperatures prompted the JTWC to upgrade the system to a tropical depression and initiate advisories, receiving the designation of 13W.{{cite web|title=Tropical Depression 13W (Thirteen) Warning Nr 001|url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201807202100.htm|date=July 20, 2018|archive-date=May 22, 2024|access-date=July 1, 2020|archive-url=https://archive.today/20240522205244/https://www.webcitation.org/714sG1j0t?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201807202100.htm|url-status=dead}} On 00:00 UTC of July 21, the JMA began issuing advisories on the tropical depression, meaning that the system is expected to strengthen to a tropical storm within the next 24 hours.{{cite web|title=RSMC Tropical Cyclone Advisory TD|url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807210000.htm|date=July 21, 2018|archive-date=May 22, 2024|agency=Japan Meteorological Agency|access-date=July 1, 2020|archive-url=https://archive.today/20240522205208/https://www.webcitation.org/714riaxNt?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807210000.htm|url-status=dead}} Three hours later, the PAGASA began issuing advisories on the tropical depression, giving the local name Josie.{{cite web|title=Severe Weather Bulletin #1 Tropical Depression "JOSIE"|url=https://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin/SWB%231.pdf|agency=PAGASA|date=July 21, 2018|archive-date=July 22, 2018|access-date=July 1, 2020|archive-url=https://www.webcitation.org/716vYEWZz?url=https://pubfiles.pagasa.dost.gov.ph/tamss/weather/bulletin/SWB%231.pdf|url-status=dead}}

Around the time the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) started tracking the storm, Josie was located in an area of low vertical wind shear of 5-10 knots.{{cite web|title=Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning Nr 03|url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807210900.htm|date=July 21, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205329/https://www.webcitation.org/714sMnZZz?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807210900.htm|url-status=dead}} This helped organise the storm more as a "compact system" with deep convection, despite remaining at tropical depression intensity. However, in a post-analysis report after the season, the JTWC classified Josie as a tropical storm with 1-minute sustained winds of 65 km/h (40 mph).{{cite web|title=JTWC Annual Tropical Cyclone Report 2018|url=https://www.metoc.navy.mil/jtwc/products/atcr/2018atcr.pdf|publisher=Joint Typhoon Warning Center|access-date=2020-07-01|archive-date=2020-09-11|archive-url=https://web.archive.org/web/20200911044118/https://www.metoc.navy.mil/jtwc/products/atcr/2018atcr.pdf|url-status=live}} The JMA only remained the system as a tropical depression with a minimum barometric pressure of 996 hPa (29.41 inHg).{{cite web|title=RSMC Tropical Cyclone Advisory|url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807211200.htm|date=July 21, 2018|archive-date=May 22, 2024|agency=Japan Meteorological Agency|access-date=July 1, 2020|archive-url=https://archive.today/20240522205531/https://www.webcitation.org/716Bp9tmM?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807211200.htm|url-status=dead}} As Josie neared the northern tip of Luzon, vertical wind shear gradually increased, maintaining the storm's intensity.{{cite web|title=Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning Nr 06|url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807220300.htm|date=July 22, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205656/https://www.webcitation.org/716C075N8?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807220300.htm|url-status=dead}} By 09:00 UTC of July 22, Josie curved northward, and animated satellite imagery showed the storm's structure began to deteriorate. The storm's center became really disorganised.{{cite web|title=Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning Nr 07|url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807220900.htm|date=July 22, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205614/https://www.webcitation.org/716Bzj961?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807220900.htm|url-status=dead}} Twelve hours later, the JMA issued its final advisory on Josie, meaning that the JMA no longer expects the system to intensify into a named tropical storm.{{cite web|title=RSMC Tropical Cyclone Advisory TD|url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807222100.htm|date=July 22, 2018|archive-date=May 22, 2024|agency=Japan Meteorological Agency|access-date=July 1, 2020|archive-url=https://archive.today/20240522205806/https://www.webcitation.org/717wagExQ?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201807222100.htm|url-status=dead}} By the next day, the storm's center became exposed with its last remaining convection being sheared.{{cite web|title=Prognostic Reasoning for Tropical Depression 13W (Thirteen) Warning Nr 11|url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807230900.htm|date=July 23, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205847/https://www.webcitation.org/717wslCLG?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201807230900.htm|url-status=dead}} Hence, the JMA fully stopped tracking the system on 12:00 UTC of July 23.{{Cite web |url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201807231200.htm |title=Archived copy |access-date=2018-07-24 |archive-date=2024-05-22 |archive-url=https://archive.today/20240522192534/https://www.webcitation.org/7198xHtRy?url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201807231200.htm |url-status=live }} The JTWC issued their final advisory on the system three hours later.{{cite web|title=Tropical Depression 13W (Thirteen) Warning Nr 012|url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201807231500.htm|date=July 23, 2018|archive-date=May 22, 2024|publisher=Joint Typhoon Warning Center|access-date=July 1, 2020|archive-url=https://archive.today/20240522205927/https://www.webcitation.org/7199XCVjr?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201807231500.htm|url-status=dead}}

Preparations and impact

On July 21, as soon as PAGASA began tracking Tropical Depression Josie, Tropical Cyclone Warning Signal (TCWS) #1 was issued for the Ilocos Region (Region I), northern Cagayan and the Babuyan Islands.{{cite web|title=Advisory on Severe Weather Bulletin No. 01 re Tropical Depression JOSIE|url=http://www.ndrrmc.gov.ph/attachments/article/3373/Advisory_SWB_No_01_re_Tropical_Depression_JOSIE_issued_on_21JUL2018_1100H.pdf|date=July 21, 2018|publisher=NDRRMC|access-date=July 1, 2020|archive-date=July 29, 2018|archive-url=https://web.archive.org/web/20180729034739/http://www.ndrrmc.gov.ph/attachments/article/3373/Advisory_SWB_No_01_re_Tropical_Depression_JOSIE_issued_on_21JUL2018_1100H.pdf|url-status=live}} This also meant that local government officials within the area banned sea travel in the eastern seaboards of Luzon, and advised residents to take appropriate actions against flooding and landslides.{{cite web|title=Josie gains speed, threatens Babuyan Islands: PAGASA|url=https://news.abs-cbn.com/news/07/21/18/josie-gains-speed-threatens-babuyan-islands-pagasa|date=July 21, 2018|agency=ABS CBN News|access-date=July 1, 2020|archive-date=July 1, 2020|archive-url=https://web.archive.org/web/20200701090932/https://news.abs-cbn.com/news/07/21/18/josie-gains-speed-threatens-babuyan-islands-pagasa|url-status=live}} At that time, the PAGASA warned that light to moderate rainfall was expected in most of Central Luzon, the rest of Mountain Province and the province of Pangasinan, while majority of the country will experience light rainfall with scattered thunderstorms within the next 12 hours.{{cite web|title=Josie batters north; storm signals raised|date=July 22, 2018|author=Rhodina Villanueva|publisher=Philstar|url=https://www.philstar.com/headlines/2018/07/22/1835709/josie-batters-north-storm-signals-raised|access-date=July 1, 2020|archive-date=July 2, 2020|archive-url=https://web.archive.org/web/20200702153006/https://www.philstar.com/headlines/2018/07/22/1835709/josie-batters-north-storm-signals-raised|url-status=live}} They also warned that all residents residing near creeks, rivers and channels must evacuate, and hence, all bridges and roads were closed in Northern Luzon and in the Cordilleras. The PAGASA later issued a yellow rainfall warning for Batangas, which meant that flooding was possible with a continuous intense rainfall of about 15–30 mm (0.6–1.2 in) being observed in an hour.{{cite web|title=Tropical Depression Josie brings more rains to Luzon|url=https://cnnphilippines.com/news/2018/07/21/Inday-PAGASA-LPA.html|date=July 21, 2018|publisher=CNN Philippines|access-date=July 1, 2020|archive-date=July 1, 2020|archive-url=https://web.archive.org/web/20200701114717/https://cnnphilippines.com/news/2018/07/21/Inday-PAGASA-LPA.html|url-status=dead}} On 5:00 pm local time (09:00 UTC) of the same day, the National Disaster Risk Reduction and Management Council (NDRRMC) issued a "red alert" to all member and government agencies towards the areas that are affected, mainly in the northern provinces.{{cite web|title=NDRRMC issues red alert status due to TD 'Josie'|url=https://news.mb.com.ph/2018/07/21/ndrrmc-issues-red-alert-status-due-to-td-josie/|date=July 21, 2018|publisher=Manila Bulletin|access-date=July 1, 2020|archive-date=July 21, 2018|archive-url=https://web.archive.org/web/20180721121844/https://news.mb.com.ph/2018/07/21/ndrrmc-issues-red-alert-status-due-to-td-josie/|url-status=live}} This red alert means that all member agencies must take action towards immediate help from affected families from torrential rains.

Later that day, Pangasinan was under a state of calamity due to widespread flooding,{{cite web|title=Tropical Depression Josie crossing Babuyan Islands|url=https://www.rappler.com/nation/special-coverage/weather-alert/207888-tropical-depression-josie-pagasa-forecast-july-22-2018-2am|date=July 22, 2018|publisher=Rappler|access-date=July 1, 2020|archive-date=July 1, 2020|archive-url=https://web.archive.org/web/20200701013533/https://www.rappler.com/nation/special-coverage/weather-alert/207888-tropical-depression-josie-pagasa-forecast-july-22-2018-2am|url-status=live}} where 1,291 families (or 5,067 individuals) have been temporarily evacuated.{{cite web|title='Josie' exiting; 'habagat' causes calamitous flooding in Luzon|url=https://news.mb.com.ph/2018/07/22/josie-exiting-habagat-causes-calamitous-flooding-in-luzon/|date=July 23, 2018|publisher=Manila Bulletin|access-date=July 1, 2020|archive-date=July 23, 2018|archive-url=https://web.archive.org/web/20180723023843/https://news.mb.com.ph/2018/07/22/josie-exiting-habagat-causes-calamitous-flooding-in-luzon/|url-status=live}} In Calatagan, Batangas, a boat got capsized due to rough seas spawned by the enhancement of the monsoon and rescued the 57 passengers and 10 crew members safely. More than 250,000 houses were affected in seven different regions, where a total of 14,551 families (61,674 individuals) were escorted to 302 evacuation centres.{{cite web|title=NDRRMC: Over 250,000 families affected by days of rain, flooding|url=https://www.philstar.com/headlines/2018/07/24/1836381/ndrrmc-over-250000-families-affected-days-rain-flooding|date=July 22, 2018|publisher=Philstar|access-date=July 1, 2020|archive-date=July 2, 2020|archive-url=https://web.archive.org/web/20200702210402/https://www.philstar.com/headlines/2018/07/24/1836381/ndrrmc-over-250000-families-affected-days-rain-flooding|url-status=live}}

References

External links

[http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/best_tracks/2018/2018s-bwp/bwp132018.dat JTWC Best Track Data]{{dead link|date=April 2025|bot=medic}}{{cbignore|bot=medic}} of Tropical Depression 13W (Thirteen)
[https://web.archive.org/web/20211117102848/https://www.nrlmry.navy.mil/tcdat/tc18/WPAC/13W.THIRTEEN/ 13W.THIRTEEN] from the U.S. Naval Research Laboratory

13W 2018

Category:2018 in the Philippines