Climatological Peak Arrives With The Atlantic Bubbling
Posted: 02:10 PM 29 August 2014 | | Add Comment
Invest 99L which made its way from the Caribbean across the Yucatan and into the extreme southwestern Gulf of Mexico has become the fifth tropical cyclone of the 2014 Atlantic Hurricane Season.
Tropical Depression Five presently consists of a well defined surface circulation with a curved band of hearty convection wrapping around to the south and east of the center, and maximum sustained winds of 30 MPH. Five is forecast to become Dolly and make landfall well south of The Texas/Mexico border around mid-week as a low-end tropical storm.
The end of August comes with entering the climatological peak for activity in the Atlantic basin, and it appears it could be coming right on schedule with no less than five areas of disturbed weather in the Atlantic. Should any of these disturbances become better defined and/or they are issued Invest tags, we will set up individual Forecast Lounges, as warranted.
Closest to home, the broad low of old Invest 98L, which moved inland near Brownsville, Tx late yesterday, has subsumed a strong tropical surge that ran up behind it.
This merged feature is presently producing widespread tropical showers and some thunderstorms along the Gulf of Mexico from the Mexico/Texas border all the way to the west coast of Florida. Gusts of up to 50 MPH are occuring offshore, and as a westerly wind component already exists, despite the old center of 98L now being just inland, it may be wise to keep tabs on this throughout this holiday weekend, just in case. Sometimes inland centers can reform offshore, if given the chance. Either way, some on again/off again squally weather is a safe bet for much of the gulf coast today, and possibly into the rest of the weekend.
Below: Invest 98L 12:15PM CDT 8/29/2014
Texas Gulf Coast Links Texas/South Plains Valley Composite Radar Loop (Latest Static) East to West:
Caribbean Broadcast Corporation (TV/Radio from Antilles)
DR1 Dominican Republic Hurricanes
Tropical Depression Five Event Related Links
SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page
Clark Evans Track Model Plot of TD#5 (Animated!) Model Plots in Google Earth - In Google Maps
Clark Evans Intensity Model Plot of TD#5 (Animated!)
End of an Era
Posted: 02:40 PM 01 September 2014
In the 45 seasons from 1950-2014 there were 17 seasons that only had three named storms by August 31st, so its not an unusual event, but it is unusual that the last one was 20 years ago. At the other end of the activity spectrum, in 1995, 2005, 2011 and 2012 there were 12 named storms by August 31st. Here are the previous 16 seasons since 1950 with three or less named storms prior to September 1st along with activity totals for those years, totals for the following year, and hurricane landfall statistics for the 16 seasons:
Year - # by 8/31 - total activity - following year - U.S. landfalls - FL landfalls
1952 2 6/6/3 13/6/4 1 0
1956 3 8/4/2 7/3/2 1 1
1957 2 7/3/2 10/7/5 1 0
1961 1 11/8/7 5/3/1 2 0
1962 2 5/3/1 9/7/2 0 0
1963 2 9/7/2 12/6/6 1 0
1965 3 6/4/1 11/7/3 1 0
1967 1 8/6/1 8/4/0 1 0
1977 1 6/5/1 12/5/2 1 0
1980 3 11/9/2 12/7/3 1 0
1982 3 6/2/1 4/3/1 0 0
1983 2 4/3/1 13/5/1 1 0
1987 3 7/3/1 11/5/3 1 1
1991 2 8/4/2 7/4/1 1 0
1992 2 7/4/1 7/3/1 1 1
1994 3 7/3/0 19/11/5* 0 0
Average 2 7/5/2 9/5/2 1 0
(*1995 was not included in the 'following year' average since 1995 was the start of the active cycle.)
Note that although these were all slow starting years (and mostly quiet years), every season except 1994 had at least one major hurricane. Although these were mostly quiet years, only three of them did not have a U.S. landfalling hurricane, while in Florida only three seasons had a landfalling hurricane. In the following year, one season had normal activity while seven seasons were above normal and seven seasons had below normal named storm activity, i.e., no correlation to the previous year. On average, based on the 16 seasons that started with three named storms (or less) by August 31st, this season would be expected to have four more named storms - with a minimum of one more and a maximum of eight more.
Since the lack of activity cannot be blamed on an El Nino event (it has not yet started), it is increasingly likely that the period of Atlantic high tropical cyclone activity has ended. However, it is important to remember that the likelihood of a U.S. hurricane landfall is about the same (approximately 22%) during a 'quiet cycle' era as it is during an 'active cycle' era - and that is also true for a Florida hurricane landfall (about 5%).