A disorganized sub-tropical disturbance monitored by the National Hurricane Center for possible development brought severe thunderstorms and gales to the island for Father’s day.
Father’s day started out with a moist easterly flow as a subtropical disturbance was expected to pass just to our south. However, afternoon heating allowed a strong convective shower to develop on the north side of the disturbance which allowed a small scale low level circulation to develop underneath it – tapping into the broad circulation of the disturbance to do so. The complex of convective showers was noted by the Bermuda Weather Service and a Severe Weather Warning was issued at 2:30pm just as the system moved into the western parishes. The core of heavy rain passed over the western half of the island as it tracked north-northeastward, this made rainfall totals vary 0.30″-1.00″.
The Severe Weather Warning was issued calling for wind gusts over 50kts and the potential for funnel clouds/tornadoes. Radar showed rotation, but it didn’t match the signature of a tornado, more that of a mesocyclone – warnings were there to be safe, and rotation was reported in some low hanging clouds in the central parishes.
Because this was not a fully tropical system, the temperatures plummeted in this convective shower as it mixed down rain cooled air and a new record low was observed at the Bermuda Weather Service (66.7F, breaking the old record of 69F in 1950). About half an inch of rain fell across the island, and despite the severe winds, there have been few reports of any damage.
Here are some observations from around the island on June 17th:
|Location||Lo temp (F)||Rainfall||peak gust (mph)|
|BWS, St. Georges||66.7||0.49″||64|
|Magnolia Hall, Smiths||69.0||–||53|
|Knapton Hill, Devonshire||66.6||0.36″||31|
|Moore’s Lane, Pembroke||68.0||1.23″||29|
|George’s Bay, Sandys||67.0||1.09″||28|
In the afternoon of June 19th, the National Hurricane Center named this same system – Tropical Storm Chris. As of the latest advisory:
“…Chris Heading Towards Cooler Waters, Has Probably Reached Its Peak Intensity…
Summary of 500pm AST (2100 UTC) Information:
Location: 38.5N, 49.0W
About 605mi (970km) SSE of Cape Race, Newfoundland
Maximum Sustained Winds: 60mph (95km/h)
Present Movement: East or 85 Degreees at 21mph (33km/h)
Minimum Central Pressure: 997mb (29.44 inches)”
The storm is expected to continue moving eastward into the open North Atlantic where it will eventually succumb to baroclinic processes and become a post-tropical storm. Chris is not expected to affect further land aside from the large swells that it is generating.