October 2021 nor'easter

Last updated

Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On October 24‍–‍25, a non-tropical mid-level trough moved across the Southern United States and out into the Atlantic, where a well defined area of low pressure formed. [1] The National Hurricane Center (NHC) began monitoring the disturbance on October 24, noting that it could potentially develop into a subtropical or tropical cyclone several days later. [7] The extratropical low that produced the nor'easter (which later transitioned into Tropical Storm Wanda) formed on October 25, about 140 mi (220 km) southeast of Cape Fear, North Carolina, when the eastern part of the trough began interacting with the warm waters of the Gulf Stream. The following day, the low proceeded to move northeastward along the U.S. East Coast, ahead of another trough. There it deepened, and its structure improved, as it absorbed another extratropical low over the Northeastern United States, which was located to the west. [1] The nor'easter became a bomb cyclone [8] on October 26‍–‍27, when its central barometric pressure dropped from 996 mbar (29.41 inHg) to 973 mbar (28.73 inHg) over a 24 hour period. During this time, at 00:00  UTC on October 27, the system also reached its peak strength with sustained winds of 70 mph (110 km/h), while located about 125 mi (205 km) east-southeast of Nantucket, Massachusetts. [1]

Tropical Storm Wanda over the North Atlantic on November 3 Wanda 2021-11-03 1530Z.jpg
Tropical Storm Wanda over the North Atlantic on November 3

The nor'easter was making a counterclockwise loop while rapidly intensifying, and when completed, it gradually weakened while moving out to sea. Embedded within a trough as it began moving eastward late on October 27, the NHC rated the five-day probability of it becoming subtropical as low (less than 40%). Late on October 29, the system began acquiring subtropical characteristics, following a flare-up of convection in its northern region. Then, at 12:00 UTC on October 30, Subtropical Storm Wanda formed about 595 mi (955 km) south-southeast of Cape Race, Newfoundland. That same day, Wanda's generally eastward movement came to an abrupt stop, and the sheer decreased, which provided an opportunity for it to gain strength. Consequently, it was able to reach its peak intensity with maximum sustained winds of 60 mph (95 km/h) and a minimum central pressure of 983 mbar (29.03 inHg) at 12:00 UTC on October 31. [1]

Though Wanda moved over slightly warmer waters on November 1, it was weakened some by renewed sheer and entrainment of dry air. Nonetheless, the system transitioned into a fully-tropical storm at 12:00 UTC that day, about 950 mi (1,530 km) west-southwest of the Azores. After turning east, then northeast early on November 2, the storm produced a large burst of convection. Several hours later, however, Wanda entrained more dry air, which degraded the convection. On the next day, now following a northerly track, Wanda generated another burst of convection. This brought the storm over cooler 68–70 °F (20–21 °C) waters, where its sustained winds fluctuated between 45 and 50 mph (75 and 85 km/h) into November 4. Even so, Wanda was able to maintain some convection around its center during this time. Wanda turned southward on November 5, due to a narrow, strengthening ridge to the northwest. [1]

Late on November 6, Wanda began accelerating northeastward, as it began interacting with a larger extratropical cyclone approaching from the west over the northern Atlantic. The resulting wind shear stripped away Wanda's remaining convection, and it became a post-tropical cyclone by 12:00 UTC on November 7, while located about 430 mi (695 km) west-northwest of the Azores. Several hours later, the cyclone merged with an approaching frontal system and dissipated. [1]

Preparations

October 2021 nor'easter
Late October 2021 nor'easter 2021-10-27 1743Z.jpg
The nor'easter near peak intensity off the coast of the Northeastern United States, on October 27

Northeastern United States

More than 100 schools closed in Cape Cod, Massachusetts in advance of the nor'easter. [8] The Governors of New Jersey and New York declared states of emergency, with the National Weather Service issuing flash flood watches and flash flood warnings across the Northeastern United States. [9] New York City Mayor Bill de Blasio had storm drains cleared and sandbags deployed. Multiple school districts closed across New Jersey, in anticipation of the flooding. [10] Phil Murphy, the Governor of New Jersey, declared a state of emergency for the storm early on October 25. As a precaution, schools were shuttered, and flash flood warnings were issued across the state. [11]

Impact

According to Aon Benfield, damage from the nor'easter was estimated at over $200 million across the Northeastern United States. [2] Additionally, two storm-related deaths were reported. [4] At the height of the storm, over 600,000 customers lost power in the Northeastern United States. [1] [12] [13]

New Jersey

New Jersey recorded a rainfall amount of 5 inches (130 mm) by 15:00 UTC on October 27. [14] Many places around the state experienced flash floods as a result of the rain, while the Saddle River overflowed its banks, generating six to seven feet (1.83 to 2.13 meters) of water near the basin. [15] The southbound lanes of New Jersey Route 17 closed as a result. [16] In Union Beach, more than a dozen water rescues were executed after vehicles were trapped by floodwaters. [14] Trees were also felled by strong winds across the area, with one instance in Morris County killing a woman and wounding another. A tree also fell on a house, causing minor damage. [17]

Massachusetts

Over 500,000 customers lost electricity in Massachusetts, due to the nor'easter. [12] A peak wind gust of 113 mph (182 km/h) was recorded in Truro, along with 103 mph (166 km/h) in Duxbury, and 97 mph (156 km/h) in Wellfleet. [3] [18] [19] [20] Martha's Vineyard, Massachusetts reported a wind gust to 94 mph (151 km/h) and Scituate reported a gust of 87 mph (140 km/h). [8] Unofficial wind gusts of 110 mph in Wellfleet and 107 mph in Provincetown were recorded at exposed coastal locations. [21] [22] The system also brought heavy rainfall to the state, causing flooding. Its subsequent wind gusts felled trees, blocking several roadways and causing the widespread power outage. [12] Small boats were also washed ashore by the storm, and the nor'easter brought strong seas to the state. Some homes were also damaged as trees fell on them. [23] A plane was damaged at the New Bedford Regional Airport after being blown off the runway. In Hingham, a large tree brought down wires. [8] Brockton also received over 300 calls for help, along with its mayor declaring a state of emergency starting on October 27. Shelters were also opened to accommodate potential evacuees. Ferry services were affected, with very restricted operations permitted. [24]

New York

In New York State, the body of a missing kayaker was found, after he tried to cross Long Island Sound ahead of the nor'easter. [25] A flash flood emergency was issued for the Finger Lakes region of New York. Delaware, Otsego, and Sullivan counties experienced flooding. Peak winds of 52 mph (84 km/h) and 60 mph (97 km/h) were recorded in New York State and Connecticut, respectively. [14] The storm dropped a maximum total of 8.69 in (221 mm) of rain in Baiting Hollow, New York. Other daily rainfall records were set in Islip, New York at 4.47 inches (114 mm), JFK Airport at 3.24 inches (82 mm), and Bridgeport, Connecticut at 2.87 inches (73 mm). [26] Portions of the Bronx River Parkway closed due to the flooding, [27] and the Staten Island Railway was suspended for 3 hours between Huguenot and Tottenville. [28]

Elsewhere

In Rhode Island, the storm cut the power to 92,000 customers. [3] In Maine, over 25,000 customers experienced power outages. [13]

See also

Related Research Articles

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References

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  2. 1 2 Masters, Jeff; Henson, Bob (October 31, 2021). "Subtropical Storm Wanda forms, exhausting the Atlantic list of storms". New Haven, Connecticut: Yale Climate Connections. Retrieved October 31, 2021.
  3. 1 2 3 Adriana Navarro; Alyssa Smithmyer (October 27, 2021). "Nor'easter sends enormous waves crashing over homes". AccuWeather. Retrieved November 2, 2021.
  4. 1 2 Hughes, Clyde; Uria, Daniel (October 27, 2021). "Deadly nor'easter knocks out power for more than 500,000 in N.Y., New England". United Press International. Retrieved July 27, 2023.
  5. ↑ Harrison, Andrew (October 26, 2021). "Nor'easter does not cause severe issues across Hopewell Valley" . Retrieved October 28, 2021.
  6. ↑ Cappucci, Matthew; Samenow, Jason (October 26, 2021). "Intensifying nor'easter lashing Northeast with flooding rain and high winds". The Washington Post . Retrieved October 28, 2021.
  7. ↑ Zelinsky, David (October 24, 2021). Five-Day Graphical Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved July 27, 2023.
  8. 1 2 3 4 Cappucci, Matthew; Samenow, Jason (October 27, 2021). "'Bomb cyclone' brings 90 mph gusts to New England; hundreds of thousands without power". The Washington Post . Retrieved October 28, 2021.
  9. ↑ Steve Almasy (October 26, 2021). "New Jersey and New York issue states of emergency ahead of nor'easter". Cable News Network. Retrieved November 4, 2021.
  10. ↑ "Tri-state region feeling effects of heavy rain, high winds powerful Nor'easter". abc7NY. October 26, 2021. Archived from the original on October 31, 2021. Retrieved November 4, 2021.
  11. ↑ Jeff Goldman (October 26, 2021). "Fierce nor'easter to soak N.J. with up to 6 inches of rain. Flooding, gusty winds in latest update". nj.com. Retrieved November 5, 2021.
  12. 1 2 3 Emily Shapiro and Max Golembo. "Deadly Nor'easter's heavy rain and wind knocks out power to nearly 600,000". ABC News. Retrieved November 5, 2021.
  13. 1 2 Kevin Bryne, Nicole LoBiondo. "Major nor'easter clobbering Eastern Seaboard with heavy rain and wind". Accuweather. Retrieved November 5, 2021.
  14. 1 2 3 Monica Garrett, Jason Hanna and Dave Hennen (October 26, 2021). "As nor'easter drenches the East Coast, thousands have lost power and high winds threaten more outages". CNN. Retrieved November 5, 2021.
  15. ↑ "Roads Flood, Rivers Overflow As Nor'easter Dumps Heavy Rain On New Jersey". CBS New York. October 26, 2021. Retrieved November 5, 2021.
  16. ↑ "Flooding Closes Route 17 South In Saddle River: Police". Patch. October 26, 2021. Retrieved November 16, 2023.
  17. ↑ "Nor'easter Topples Trees In New Jersey And New York City, Residents Worried About Others Coming Down". CBS New York. October 27, 2021. Retrieved November 5, 2021.
  18. ↑ "Powerful Nor'easter Delivers Damaging Winds and Heavy Rain to New England and Beyond". BreakingWeather. October 28, 2021. Retrieved November 2, 2021.
  19. ↑ Weather Conditions for F6034 (Report). University of Utah. October 27, 2021. Retrieved November 2, 2021.
  20. ↑ Shea Gibson [@WeatherFlowCHAS] (October 27, 2021). "Wow! Strongest gusts at our sensors: Duxbury, MA: 103mph at 5:15AM. Height = 40ft AGL. Wellfleet, MA: 92mph at 4:10AM. Height = 20ft AGL, 88ft ASL. Scituate, MA: 97mph at 5:37AM. Height = 34ft AGL. Block Island Jetty, RI: 85mph. Height = 35ft AGL/ASL. @NWSBoston @NWSNewYorkNY" (Tweet). Retrieved November 2, 2021– via Twitter.
  21. ↑ October 2021 Nor'easter Special Wind Reconnaissance Mission (Report). Maravelias Extreme Performance Anemometry Mesonet (MAREPAM). October 27, 2021. Retrieved November 2, 2021.
  22. ↑ Full tabular data for XMRPMSPECI10262100 (Wellfleet, MA) (PDF) (Report). Maravelias Extreme Performance Anemometry Mesonet (MAREPAM). October 27, 2021. Retrieved November 2, 2021.
  23. ↑ Mihiro Shimano and Mia McCarthy. "Photos: See the aftermath of Massachusetts' first nor'easter of the season". www.boston.com. Retrieved November 5, 2021.
  24. ↑ John R. Ellement, Martin Finucane, Jeremy C. Fox, Colleen Cronin, Travis Andersen, Emily Sweeney, Tonya Alanez, Andrew Brinker, Julia Carlin, Jenna Russell and Shannon Larson. "'If you need to go out, be careful': After nor'easter blasts coast, thousands may wait days for electricity". BostonGlobe.com. Retrieved November 5, 2021.{{cite web}}: CS1 maint: multiple names: authors list (link)
  25. ↑ Matt Spillane; Eduardo Cuevas (October 27, 2021). "UPDATE: Body of missing Mamaroneck kayaker found as nor'easter whips through New York". Lohud. Retrieved November 5, 2021.
  26. ↑ "How much rain did NY, NJ, CT get from nor'easter?". FOX5NY. October 27, 2021. Retrieved July 4, 2021.
  27. ↑ Storm Wreaks Havoc On Westchester County Parkways, But Oft-Impacted Mamaroneck Escapes Mostly Unscathed, CBS News, October 26, 2021
  28. ↑ Rain Leaks Into Rockefeller Center Station, Riders Call On MTA To Invest In Subway Station Upgrades, CBS News, October 26, 2021
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