Categories
Environment

2021 Atlantic Hurricane Season Forecast

2021 is likely to be “near normal” in terms of tropical activity, though there is more risk of an active season. Impacts from landfalling hurricanes could shift eastward this season toward the U.S. East Coast and the Leeward Islands. 

The forecast for the 2021 Atlantic Hurricane Season from June-November shows the likelihood for a near normal season, with 

  • tropical cyclone activity at ~107% of normal anticipated 
  • range of activity from 97-119% of normal 
  • 17 named storms (average 14)
  • 8 hurricanes  (average 7)
  • 3 major hurricanes (average 3)

Unlike last season, the 2021 outlook does not include a hyperactive season within the expected range of outcomes, though there is very little chance for below normal activity this season. It should be noted that a “normal hurricane season” now represents higher levels of tropical activity in all aspects because of the climatology update uses 1991-2020 as the baseline instead of 1981-2010 period used previously. If 2021 outlook was issued based on the previous climatology, the forecast would call for an active season instead of a near normal one. 

2021 Storm Forecast (red) compared to normal (blue)
2021 Storm Forecast (red) compared to normal (blue)

The Greek alphabet will no longer be used to extend the named storms’ list. If all names in the first list have been used, a supplemental list will begin.

Background:
The major ocean basins’ data support a near to above normal season of tropical activity once again. Beginning with ENSO (El Niño Southern Oscillation), there is an 80% chance of neutral or La Niña conditions being in place by the August-October peak of hurricane season, with only a 20% chance of El Niño. 

La Niña is the most favorable state for active Atlantic seasons as it supports low vertical wind shear needed for tropical cyclone formation and intensification, so the strong likelihood of neutral or La Niña conditions in 2021 suggests an active year while the slight El Niño chance reduces that potential. 

The Atlantic Multi-decadal Oscillation (AMO) shows an 80% chance to be in its favorable warm Sea Surface Temperature (SST) phase for Atlantic tropical activity. 

The largest question is the Indian Ocean Dipole (IOD), which has a connection to Atlantic occurrence of dry air that suppresses tropical cyclone formation. In 2021, there are questions about the state of the IOD by August-October, which supports a nearer to normal hurricane season. 

The most reliable forecast variable is Accumulated Cyclone Energy (ACE), which is widely viewed as the best measure of cyclone activity instead of the total named storm number and hurricane number. Since tropical cyclones vary wildly in duration from 1-10+ days, similar numbers of storms in different years can still represent very different levels of activity. 

The spread among the storms is relatively narrow, with 20% of the years showing below normal activity while the other 80% showed above normal activity. Due to the narrow range among prior years relative to the new normal level of activity, 100% of the prior years used in the forecast are in the “near normal” range. This results in a high confidence outlook for near to above normal activity in 2021, with the direction of ENSO and the IOD being the key issues to monitor.  

The data used in the forecast and current SST anomalies both indicate the U.S. East Coast being at the greater risk for higher impacts than usual, based on warm ocean waters off the coastline. If the model holds, any developing tropical cyclone that moves across the Western Atlantic approaching the U.S. will have ample energy to become a high-impact hurricane if other environmental conditions allow. There is also a consensus for slightly warmer than normal SST around the Leeward Islands of the Caribbean Sea, making that another area to watch for high-end impacts this season. Gulf of Mexico SST is not low but  not near the record warmth of last year. 

Annual Atlantic seasonal  tropical cyclone activity from 1982-2021, with 2000, 2008, 2011, 2012, and 2018 highlighted in red for active, green for inactive seasons (June-November), and the 2021 forecast highlighted in purple.
Annual Atlantic seasonal  tropical cyclone activity from 1982-2021, with 2000, 2008, 2011, 2012, and 2018 highlighted in red for active, green for inactive seasons (June-November), and the 2021 forecast highlighted in purple.
Categories
Environment

Hazardous Waste and E-Scrap Collection

Anna Maria Island residents in Holmes Beach, Bradenton Beach, and Anna Maria City can dispose of household hazardous waste at a collection station to be set up January 30, 2021,  by Manatee County. Hours will be 9am – 3pm on the Gulf side parking lot of Coquina Beach Park.

Coquina Beach, Manatee County E-Scrap Hazardous Waste Collection Coquina Beach, Manatee County E-Scrap Hazardous Waste Collection

Accepted items include:

  • Solvents, paints, household chemicals, pesticides, oil
  • Ammunition, flares, propane tanks, batteries, fluorescent lamps
  • Mercury containing devices, computer components, televisions, copiers
  • Video and audio equipment, and small household appliances

Unacceptable items include:

  • Radioactive items such as smoke detectors
  • Bio-hazard materials such as needles

For more information see mymanatee.org/hhw or mymanatee.org/escrap or call Manatee County Utilities Operations Department at 941-798-6761

Map image

Categories
Environment

2020 Atlantic Hurricane Season Review

Summary:

An active 2020 summer storm season passed by Anna Maria Island with minor effects. Hurricane Eta caused a surprisingly high storm surge and flooding overnight coinciding with a high tide. A local business man died from electrocution after touching a flooded appliance.

  • Above average storm activity
  • No Anna Maria Island evacuations
  • 2 landfalls on Florida Gulf Coast, Sally and Eta
  • Minor damage from Eta 2′ surge, which flooded some low-lying Anna Maria Island properties. Minor squalls and rainfall.
Fastest growing storms of 2020
US Mainland landfalls 2020

“I think really what stood out to me about 2020 was the extremely active late season. October and November were extremely active with seven storms and a whopping four major hurricanes (Delta, Epsilon, Eta and Iota).” said Phil Klotzbach, lead author of the forecast at CSU.

The causes of the active year, according to NOAA’s lead seasonal hurricane forecaster Gerry Bell, included warmer-than-average Atlantic sea-surface temperatures and a stronger west African monsoon, along with wind patterns coming off Africa that were more favorable for storm development. 

“These conditions, combined with La Niña, helped make this record-breaking, extremely active hurricane season possible.”

While it’s clear warmer ocean temperatures make storms stronger, there’s still vigorous debate among top climate scientists on the question of whether warmer waters lead to a greater number of tropical systems. 

 “My colleagues and I feel that the jury is very much out on the topic of global tropical cyclone frequency,” said Dr. Kerry Emanuel from MIT, a leading researcher on how climate change affects hurricanes. While this Atlantic season was extreme, he points out that what we see in the Atlantic Basin is not representative of the rest of the globe. “Only about 12 percent of the world’s tropical cyclones occur in the Atlantic, and globally it has not been a very exceptional year.”


Atlantic Hurricane Season
 April 2020 forecast 2020 Actual
Named storms (>35mph)       13  30
Hurricanes (>72mph)        8  13
Major hurricanes (>111mph)        4  9
US landfall likelihood    55%  40% (12)
Gulf Coast landfall    32%  30% (9)
Florida landfall 7% (2) Keys and panhandle

The Named Storms of 2020:

NameActive PeriodPeak Strength
mph
TS ArthurMay 16-1960
TS BerthaMay 27-2850
TS CristobalJune 1-1050
TS DollyJune 21-2445
TS EdouardJuly 4-645
TS FayJuly 9-1160
TS GonzaloJuly 21-2565
Hurricane HannaJuly 23-2790 (Cat 1)
Hurricane IsaiasJul 28-Aug 585 (Cat 1)
TS JosephineAug 11-1645
TS KyleAug 14-1650
Hurricane LauraAug 20-29130 (Cat 4)
Hurricane MarcoAug 20-2575 (Cat 1)
TS OmarAug 31-Sep 540
Hurricane NanaSep 1-475 (Cat 1)
Hurricane PauletteSep 7-23105 (Cat 2)
TS ReneSep 7-1450
Hurricane SallySep 11-18105 (Cat 2)
Hurricane TeddySep 12-24140 (Cat 4)
TS VickySep 14-1750
TS BetaSep 17-2560
TS WilfredSep 18-2140
TS AlphaSep 18-1950
TS GammaOct 2-670
Hurricane DeltaOct 4-12145 (Cat 4)
Hurricane EpsilonOct 19-26115 (Cat 3)
Hurricane ZetaOct 24-29110 (Cat 2)
Hurricane EtaOct 31-Nov 13150 (Cat 4)
TS ThetaNov 10-1570
Hurricane IotaNov 13-18160 (Cat 5)
Hurricane Laura track
Hurricane Laura track August 20 – 29, 2020, becoming Cat 3 near landfall
Tropical Storm Isaias July 28 – August 5, 2020
Hurricane Delta October 4 – 12, 2020
Hurricane Zeta October 24 – 29, 2020
Hurricane Zeta wind field October 28, 2020
Tropical Storm Eta tracked west into central America causing widespread damage then returned east to cause havoc to Cuba, the Keys, and then north off the Florida west coast as Cat 4 hurricane October 24 – 28, 2020, weakening at time of landfall.

For detailed discussion of factors contributing to 2020 storm weather, see CSU meteorology (pdf).

Categories
Sports

Surf Report from White Ave, Holmes Beach

Live beach cam: http://amipost.com/surf-cam-holmes-beach/

Holmes Beach, Anna Maria Island, Florida. Small surf as Tropical Storm Marco crosses Gulf of Mexico to Louisiana.
Tropical Storm Marco crossing western Gulf of Mexico, August 23, 2020.
Tropical Storm Marco, August 24, 2020, pushing out some swells.
Categories
Health Wildlife

Donate Blood

This year 2020, Sunday, August 23, 8 am to 4 pm at Waterline Marina Resort, 5325 Marina Drive, Holmes Beach.

Donate blood this weekend and help people and animals. Wildlife Inc. is asking for your help in raising money to operate their education and rehabilitation center on Anna Maria Island.

If you have had COVID-19 (SARS-CoV-2) and made antibodies, your donated blood plasma could save lives.

The special blood drive is sponsored by Suncoast Blood who offer a free COVID-19 antibody test, a free T-shirt, and Waterline Resort who are offering a chance to win a weekend stay at the Marina Resort and Beach Club. $100 will be donated to one of three charities that you choose.

Your participation helps fund the non-profit organization Wildlife Inc., which rescues and treats more than 3000 birds, mammals, and reptiles each year and releases as many as possible back into the wild.

For more information see suncoastblood.org or call 866-972-5663