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Hurricane Debby (1982)

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Hurricane Debby
Category 4 major hurricane (SSHWS/NWS)
Hurricane Debby antecedent to peak intensity on September 17
FormedSeptember 13, 1982
DissipatedSeptember 20, 1982
Highest winds1-minute sustained: 130 mph (215 km/h)
Lowest pressure950 mbar (hPa); 28.05 inHg
FatalitiesNone reported
Areas affectedPuerto Rico, Hispaniola, Turks and Caicos Islands, Bermuda, East Coast of the United States, Atlantic Canada, Europe
Part of the 1982 Atlantic hurricane season

Hurricane Debby was the strongest tropical cyclone of the 1982 Atlantic hurricane season, with winds peaking at 130 mph (215 km/h). The fourth named storm, second hurricane, and the only major hurricane on the season, Debby developed near the north coast of Hispaniola from a westward moving tropical wave on September 13. Forming as a tropical depression, it headed northwestward, and eventually strengthened into Tropical Storm Debby the following day. Thereafter, Debby rapidly intensified into a hurricane early on September 15. The hurricane then curved northeastward and grazed Bermuda as a Category 2 hurricane on September 16. It continued to strengthen, and by September 18, Debby briefly peaked as a Category 4 hurricane on the Saffir–Simpson Hurricane Scale, with winds at 130 mph (215 km/h) and a minimum pressure of 950 mbar (hPa; 28.05 inHg).

After reaching peak intensity, Debby slowly weakened, and was between Category 2 and 1 when it passed south of Newfoundland early on September 19. Thereafter, the storm accelerated and was moving at roughly 60 mph (95 km/h) towards the east. Debby was rapidly approaching the British Isles on September 20, shortly before it transitioned into an extratropical cyclone. Overall, impact was minor in the Lesser Antilles, with only light to moderate rainfall in Dominican Republic, Puerto Rico, and the United States Virgin Islands. On Bermuda, high winds caused some power outages and knocked over trees, though damage on the island was minimal. In addition, Debby dropped rainfall and produced moderately strong winds on Newfoundland.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
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
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

A weather system moved off the coast of Africa on September 3. The disturbance was small and became unidentifiable within 24 hours of formation. Satellite imagery indicated that the disturbance may have acquired a circulation on September 7, but the circulation was gone by the next day. The remaining tropical wave moved into the Lesser Antilles on September 11 and a reconnaissance aircraft was deployed. The aircraft found circulation; however, by the next day, only a strong wave was detected. Atmospheric conditions became more favorable for development, yielding lower wind shear near Hispaniola for several days. The system moved into this area as the latest Reconnaissance aircraft was deployed, declaring it a tropical depression on September 13 near the Dominican Republic.[1]

The next Reconnaissance aircraft that investigated the system discovered a minimal pressure of 1005 mbar (28.67 inHg) and winds of 45 mph (70 km/h) in the depression's center, prompting an upgrade to Tropical Storm Debby on the morning of September 14. Uncertainty arose as to whether Debby would interact with an approaching trough or enter the influence of a ridge over the southeastern United States. The storm was later picked up by the trough, moving away from land and moved to the north. Debby strengthened further, becoming a minimal hurricane late on September 14. The hurricane deepened further, reaching maximum winds of 110 mph (180 km/h), a Category 2 storm. Debby approached Bermuda in this time, and on September 16, Debby passed 80 miles (130 km) west of the island and continued north.[1]

Hurricane Debby at peak intensity on September 18

Debby began to slow down to 5 mph (10 km/h) early on September 17 as another trough in the westerlies arrived and the system entered it.[1] As the hurricane entered the trough, its forward speed picked up from 5 mph (10 km/h) to 30 mph (50 km/h). During this time, Debby reached Category 4 strength, reaching a peak intensity of 130 mph (215 km/h) and a minimal pressure of 950 mbar (28.05 inHg).[1] Early on September 19, Debby passed just south of Cape Race, Newfoundland and started accelerating to the east at 60 mph (100 km/h) on the following day.[2] Debby remained a tropical cyclone while crossing the North Atlantic Ocean and weakened to a tropical storm at 0600 UTC September 20. Debby was rapidly approaching the British Isles on September 20 shortly before it transitioned into an extratropical cyclone.[3]

The remains of Debby maintained plenty of intensity over northern Europe, and on September 21 it struck northern parts of Finland (where it was named storm Mauri)[4] as one of the most powerful windstorms in the country's recorded history. Winds over 85 mph (137 km/h) felled millions of cubic miles of forest, and a storm surge severely damaged the cities of Kemi and Tornio, claiming two lives.[5]

Starting in the 1982 season (with Debby), the Hurricane Hunter Aircraft (also known as P-3s) began running a new mission for NOAA's Hurricane Research Division. The mission was to drop dropwindsondes that deployed very-low Omega frequency signals. These signals were to estimate the sonde's motion compared to the aircraft in certain areas in a storm.[6]

Preparations and impact

Debby rainfall

Rainfalls from Debby in Puerto Rico ranged between 3 inches (76 mm) around the northern end of the island to 10 inches (250 mm) in the southern ridge of the island. Rains on the island peaked at 12.86 inches (326 mm) in Penuelas. The U.S. Virgin Islands reported rain of about 3 inches (76 mm), while about 5 inches (130 mm) of precipitation fell in Dominican Republic.[7] The United States Navy removed its 700 personnel on Bermuda's Air Force Base, placing them in a gymnasium nearby. Thousands of tourists took last-minute flights out of Bermuda on September 16 as Debby drew near. Some of the airlines had pulled back the number of flights going in and out of the island. Eastern Airlines dropped from five flights to two, with them going to only New York City, Newark, New Jersey and Boston, Massachusetts.[8]

The storm had sustained winds of 110 mph (180 km/h) winds, and forecasters were predicting that the hurricane's eye would be over the island the next day.[9] Airlines canceled flights, buildings boarded up, and cruise liners were hurried out of their harbors in the time before Debby arrived.[10] Rescue teams evacuated workers from Mobil oil rigs in Debby's path as it neared.[10] Bermuda experienced heavy gusts of wind, which caused minor damage with no injuries or fatalities. Power outages were reported on the island, though electricity was quickly restored.[9] Numerous trees were knocked down on the island due to high winds.[11] As the storm was approaching Canada, some oil rigs offshore of Newfoundland were evacuated and a science expedition off Grand Banks was discontinued. Onshore, Debby produced light rainfall in the southeastern portions of Newfoundland, with precipitation peaking at approximately 3.5 inches (89 mm). In addition, a few areas experienced tropical storm forces winds, though damage was minimal.[12]

See also

References

  1. ^ a b c d "Hurricane Debby Preliminary Report (Page 1)". National Hurricane Center. 1982. Retrieved 2007-04-05.
  2. ^ "Hurricane Debby Preliminary Report (Page 2)". National Hurricane Center. 1982. Retrieved 2012-01-01.
  3. ^ "Hurricane Debby Preliminary Report (Page 5)". National Hurricane Center. 1982. Retrieved 2012-01-01.
  4. ^ "Mauri-hirmumyrsky riehui Lapissa 1982" (in Finnish). Yle. 22 September 2009. Retrieved 4 December 2015.
  5. ^ "Is Finland hurricane-proof?". Yleisradio. 2012. Retrieved 2013-12-13.
  6. ^ National Oceanic and Atmospheric Administration (2007). "NOAA's Gulfstream-IV Jet Takes Hurricane Track Predictions to New Heights". National Oceanic and Atmospheric Administration. Retrieved 2012-01-01.
  7. ^ David M. Roth (2007-06-20). "Incipient Stage of Debby - September 12–14, 1982". Hydrometeorological Prediction Center. Retrieved 2012-01-01.
  8. ^ Associated Press (1982-09-16). "Debby passes Bermuda isles". The Courier. Retrieved 2012-01-01.
  9. ^ a b United Press International (1982-09-16). "Crowds Flee Bermuda With Hurricane Near". The New York Times. Retrieved 2012-01-01. Cite error: The named reference "Bermudaevac1" was defined multiple times with different content (see the help page).
  10. ^ a b The Daily Intelligencer (1982-09-16). "Hurricane Debby Gains Strength". The Daily Intelligencer. {{cite web}}: |access-date= requires |url= (help); Missing or empty |url= (help) Cite error: The named reference "Bermudaevac2" was defined multiple times with different content (see the help page).
  11. ^ Associated Press (1982-09-18). "Hurricane Debby Heads North After Brushing by Bermuda". New York Times. Retrieved 2012-01-01.
  12. ^ "1982-Debby". Environment Canada. 2010-09-14. Retrieved 2012-01-01.
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