Update - Thursday, September 15, 2011 - 5PM
At the the historical peak of hurricane season, Maria has been upgraded to a hurricane, with hurricane watches up for the Eastern portion of Newfoundland in Canada. Particularly, the Avalon Peninsula, Arnolds Cove to Brigus South.
ENVIRONMENT CANADA HAS ISSUED A HURRICANE WATCH FOR THE AVALON
PENINSULA OF NEWFOUNDLAND FROM ARNOLDS COVE TO BRIGUS SOUTH AND A
TROPICAL STORM WARNING FOR THE ENTIRE AVALON PENINSULA FROM ARNOLDS
COVE TO JONES HARBOR.
Update - Wednesday, September 14, 2011 - 9PM
Although still a sheared system, Recon indicates that TS Maria is a little stronger and moving a little faster to the north northeast. In addition to the Tropical Storm Warning, a Hurricane Watch has been issued for Bermuda. The center of Maria should pass west of Bermuda late Thursday morning and start a more northeastward movement as the storm becomes post-tropical on Friday.
A tropical wave south of the Cape Verde Islands may merge with a stronger wave exiting the west coast of Africa tonight. Windshear in that area is still light, so some development of this system is possible in a couple of days.
Another interesting feature is a strong cut-off upper level low that has been moving to the west southwest for the past 24 hours. At 15/00Z the ULL was located at 22N 51W and it should be near 20N 60W by 16/12Z (Friday morning). This low has popped some limited convection near the center from time to time - at the moment its nothing more than an interesting feature to watch.
Update - Wednesday, September 14, 2011 - 530AM
Maria remains a sheared tropical storm located south southwest of Bermuda. Maria is expected to move north and eventually north northeast with no significant change in intensity and become post-tropical near Newfoundland, Canada, by late Thursday. Tropical Storm Warnings are in effect for Bermuda.
Beyond Maria, no other immediate activity is likely (at least for a few days).
Update - Monday, September 12, 2011 - 1205AM
Nate moved inland near Poza Rica de Hidalgo, Mexico, on Sunday as a 35-40 knot Tropical Storm and is now a remnant inland low.
Maria is north of Puerto Rico and didn't make much western progress at all Sunday evening under the onslaught of strong southwesterly wind shear. The shear, along with some entrainment of dry air to the west has again significantly disrupted the structure of the tropical cyclone. Center location is difficult but trajectory analysis on cloud particles suggest that the NHC position on Maria is probably close - perhaps a tad further south or perhaps just a center that has become elongated by the shear. With no new data, the intensity was generously maintained. Maria will face a hostile upper air environment for the remainder of the week which makes opportunities for additional intensification rather slim.
Update - Sunday, September 11, 2011 - 1245AM
Just a short update to note that Nate may be weakening again. The pressure at Veracruz has increased quite a bit and the wind is Calm. At Poza Rica de Hidalgo the pressure is also up and the wind is east at 8knots. The wind field must be quite small and decreasing.
Maria on the other hand is still under considerable shear but, at least visually, seems to be getting stronger. Tropical storm force winds are expected to remain well to the northeast of the Islands.
Original Post - Saturday, September 10, 2011 - 1028AM
At the statistical height of the season we still have three storms in progress - barely! Cat I Hurricane Katia in the northern Atlantic is becoming a strong extratropical low pressure system heading toward the northern United Kingdom at a brisk pace. Additional information on this storm is available from the
U.K. Met Office .
Tropical Storm Maria near the northern Leeward Islands is moving northwest and continues to be disrupted by windshear. Its status as a Tropical Storm is likely to change to a Tropical Depression or even an open wave since there is only a suggestion of a weak circulation to the northeast of the northern islands. Gusty winds and heavy showers are likely in the Windward and Leeward Islands today and tonight. Its possible that the system may relocate/reform a center more to the south.
Tropical Storm Nate has finally started a westward movement along/near 20N in the southern Bay of Campeche. On Friday dry air to the northwest made its way into the center of the cyclone and the storm weakened. A large center is now surrounded by convection. While NHC still suggests intensification, the development of this storm has not progressed as anticipated. Since northerly shear and dry air entrainment are still probable, at best, some modest intensification is possible as Nate heads for a Monday landfall in the area north of Veracruz. At 10/15Z the following Watches/Warning were still in effect:
A HURRICANE WATCH IS IN EFFECT FOR...
* MEXICO FROM TAMPICO TO VERACRUZ
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* MEXICO FROM TAMPICO TO PUNTA EL LAGARTO
A couple of tropical waves are noted in the central tropical Atlantic and a third wave is about to exit the west African coast.
Guadelopue/Leewards Radar recording for Maria's approach
Long term Central Atlantic wide area Water Vapor Satellite for Hurricane Season Peak flhurricane)
Long term West Atlantic wide area Water Vapor Satellite for Hurricane Season Peak flhurricane)