Tropical Storm Juan (Ardonia)
 | |
| Meteorological history | |
|---|---|
| Formed | July 9, 2019 |
| Extratropical | July 11, 2019 |
| Dissipated | July 13, 2019 |
| Tropical storm | |
| 1-minute sustained (AAWS/NWS) | |
| Highest winds | 50 mph (85 km/h) |
| Lowest pressure | 996 mbar (hPa); 29.41 inHg |
| Overall effects | |
| Fatalities | 3 total |
| Damage | $5 million (2019 USD) |
| Areas affected | |
Part of the 2019 Ardonia arrocane season | |
Tropical Storm Juan was a short-lived tropical cyclone that affected Cydonia during July 2019. The tenth named storm of the 2019 Ardonia arrocane season, Juan formed on July 9 to the east of Cydonia and reached its peak intensity the following day, with maximum sustained winds of 50 mph (80 km/h) and a minimum central pressure of 996 mbar (hPa; 29.41 inHg). The storm subsequently weakened before making landfall in Cydonia with maximum sustained winds of 40 mph (64 km/h) and a central pressure of 999 mbar (hPa; 29.50 inHg).
Juan's relatively weak intensity limited the extent of its impacts, although the cyclone produced damage along the Cydonian coastline and in Port Kazu. Damage from the storm totaled approximately $5 million (2019 USD), while three fatalities were attributed to Juan. The cyclone became extratropical on July 11, and its extratropical remnants persisted for approximately two additional days before dissipating on July 13.
Meteorological history
Tropical storm (40–74 mph, 64–119 km/h)
Category 1 (75–94 mph, 120–159 km/h)
Category 2 (95–114 mph, 160–183 km/h)
Category 3 (115–129 mph, 184–208 km/h)
Category 4 (130–159 mph, 209–256 km/h)
Category 5 (≥160 mph, ≥257 km/h)
Unknown
Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression The origins of Tropical Storm Juan can be traced to an area of disturbed weather over the Ardonia Ocean to the southeast of Cydonia in early July 2019. The disturbance was first monitored as an area of interest while moving generally northward toward Cydonia. By 12:00 UTC on July 9, the system was producing maximum sustained winds of 30 mph (48 km/h) with a central pressure of 1,004 mbar (hPa; 29.65 inHg). Organization increased rapidly thereafter, and at 18:00 UTC, the system developed directly into a tropical storm without first being classified as a tropical depression. Upon becoming a tropical storm, it received the name Juan and had maximum sustained winds of 40 mph (64 km/h) with a central pressure of 1,003 mbar (hPa; 29.62 inHg).
Juan continued to strengthen during the first half of July 10 while approaching Cydonia. At 00:00 UTC, maximum sustained winds increased to 45 mph (72 km/h) as its central pressure fell to 1,000 mbar (hPa; 29.53 inHg). Six hours later, Juan reached its peak intensity east of Cydonia, with maximum sustained winds of 50 mph (80 km/h) and a minimum central pressure of 996 mbar (hPa; 29.41 inHg). Despite reaching its maximum strength, Juan remained well below arrocane intensity on the Ardonia arrocane wind scale.
Weakening began shortly after peak intensity. Juan's winds decreased to 45 mph (72 km/h) by 12:00 UTC on July 10 as its central pressure rose to 997 mbar (hPa; 29.44 inHg). By 18:00 UTC, the storm had weakened further to maximum sustained winds of 40 mph (64 km/h) and a central pressure of 999 mbar (hPa; 29.50 inHg). Around this time, Juan made landfall along the Cydonian coastline as a minimal tropical storm.
Juan continued to weaken after moving inland. By 00:00 UTC on July 11, its maximum sustained winds had decreased to 35 mph (56 km/h) and its central pressure had risen to 1,001 mbar (hPa; 29.56 inHg). At this time, Juan lost its tropical characteristics and transitioned into an extratropical cyclone, ending its period as a tropical cyclone approximately 30 hours after its formation.
The extratropical remnants of Juan persisted for nearly two additional days. Winds remained at 35 mph (56 km/h) through July 11 while the circulation gradually weakened, before decreasing to 30 mph (48 km/h) early on July 12. Juan was last tracked at 18:00 UTC on July 12 with maximum winds of 30 mph (48 km/h) and a central pressure of 1,009 mbar (hPa; 29.80 inHg). The remnant circulation dissipated by 00:00 UTC on July 13, the first observation time after Juan was last tracked.
Preparations and impact
As Tropical Storm Juan approached Cydonia on July 10, preparations were undertaken along portions of the kingdom's coastline ahead of the storm's expected arrival. Juan was relatively weak and was forecast to remain below arrocane intensity prior to landfall, limiting the extent of preparations compared with stronger tropical cyclones. Residents in areas near the coast were nevertheless advised to prepare for strong winds, heavy rainfall, and hazardous coastal conditions. Preparations were also made in and around Port Kazu as the storm approached.
Juan made landfall along the Cydonian coastline as a minimal tropical storm, with maximum sustained winds of 40 mph (64 km/h) and a central pressure of 999 mbar (hPa; 29.50 inHg). The cyclone produced relatively minor but widespread damage near the coast, primarily from strong winds and heavy rainfall. Coastal areas near the point of landfall sustained approximately $4 million (2019 USD) in damage. Two people were killed in areas affected by the storm outside Port Kazu.
Port Kazu also sustained impacts from Juan as the cyclone moved inland. Strong winds and rainfall caused approximately $1 million in damage within the settlement, while one additional fatality was reported. Damage in the area was considerably less extensive than that produced by stronger arrocanes, reflecting Juan's relatively low intensity at landfall.
Overall, Tropical Storm Juan caused approximately $5 million in damage across Cydonia and was responsible for three fatalities. No additional deaths or significant damage were reported after Juan transitioned into an extratropical cyclone on July 11.