Post-Tropical Alberto
batters Nova Scotia

Here is the latest update from Environment Canada....


WOCN31 CWHX 151800
Post-tropical storm Alberto information statement issued by the canadian hurricane centre of Environment Canada at 3.00 PM ADT Thursday 15 June 2006.
The next statement will be issued by 9.00 PM ADT
... The intense storm that formed from Alberto batters Nova Scotia...

1. Current position, strength, central pressure and motion
At 3.00 PM ADT... Post-tropical storm Alberto was located near Latitude 42.6 N and longitude 63.9 W... About 120 nautical miles Or 220 km southeast of Yarmouth. Maximum sustained winds are Estimated at 55 knots... 102 km/h... And central pressure at 970 MB. Alberto is moving east northeast at 25 knots... 46 km/h.

2. Forecast position, central pressure and strength
Date time lat lon MSLP Max wind
ADT MB kts kmh
Jun 15 3.00 PM 42.6N 63.9W 970 55 102 post-tropical
Jun 16 3.00 AM 45.4N 57.8W 976 55 102 post-tropical
Jun 16 3.00 PM 48.6N 51.8W 986 45 83 post-tropical
Jun 17 3.00 AM 52.0N 42.3W 990 40 74 post-tropical

3. Public weather impacts and warnings summary Heavy rain and storm force winds continue buffeting portions of Nova Scotia as the storm system passes by south of the province.
Rainfall accumulations in excess of 10 mm per hour were reported Over western Nova Scotia this morning while winds along the atlantic coast of western Nova Scotia were gusting to more than 100 km/h.
The atlantic storm prediction centre is maintaining wind and heavy rain warnings for portions of Nova Scotia and will be issuing a wind warning for portions of southern Newfoundland. Details can be found in the bulletins issued by the atlantic storm prediction centre.

4. Marine weather impacts and warnings summary The atlantic storm prediction centre is maintaining storm and gale warnings for many maritime and Newfoundland marine areas and will Be extending the storm warnings to areas south of Newfoundland.
Details can be found in the bulletins issued by the atlantic storm prediction centre.

5. Technical discussion
A. Analysis
For continuity we are continuing to refer to this storm as post- tropical Alberto however it has no tropical chartacteristics left when looking at the satellite signature. It is simply a mature extratropical cyclone. The fact that it is this deep in June is Quite rare and likely owes its strength... In part... To the ripe ingredients that it ingested from Alberto overnight.
The storm continues deepening this afternoon with a central pressure In the low 970S at forecast time. The gem initialized too high...
As did other models... However all models recognize that an intense low is in maritime waters.
Dry air has wrapped around the low and significant convection has been evident for many hours just north of the low. Lightning continues being reported west of the low centre over the marine district.
B. Prognostic
The gem regional appears reasonable regarding the track and pressure Tendency for central pressure... Apart from initializing too high.
Between a good satellite and marine data fix on the low centre at 15Z and the gem prog we are content to maintain a similar track to what we issued earlier.
C. Public weather
Nova Scotia rainfall totals up to 17Z include 41 mm at Lunenburg and Western Head.. And 38 mm at Yarmouth. The strongest coastal winds Reported have been peak winds of 119 km/h at Baccaro Point...
Marginal hurricane force. We expect that 40-60 mm rainfall totals will have occurred by the time that this system is in the books.
D. Marine weather
Storm force winds at the Georges Bank buoy were reported well behind the storm so it continues deepening. Wave heights also reached 7 m At that location before they started dropping. A very tight gradient behind the storm is being exaccerbated by strong isallobarics so storm force winds should be expected both ahead of and behind this system for at least the next 12 hours.