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1947 Project Cirrus hurricane
Category 1 hurricane (SSHWS/NWS)
FormedOctober 9, 1947 (1947-10-09)
DissipatedOctober 16, 1947 (1947-10-16)
Highest winds1-minute sustained: 85 mph (140 km/h)
Lowest pressure973 mbar (hPa); 28.73 inHg
Fatalities1 direct
Part of the 1947 Atlantic hurricane season

The 1947 Project Cirrus hurricane (unofficially designated Hurricane King)

Meteorological history

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Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
  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

The hurricane was first observed as a tropical low along the Intertropical Convergence Zone (ITCZ) as it relocated north of the Isthmus of Panama. The system was positioned east of Cabo Gracias a Dios on October 9,[1][2] near its development into a tropical storm around 0600 UTC. It initially meandered north-northwestward through the Caribbean, though it suddenly accelerated during the latter half of October 10 as it turned northward. The storm continued to intensify even as it crossed Cuba on October 11, and took a sudden turn northeast, subsequently entering the Gulf of Mexico while it approached the Florida Keys.[3]

Over the evening through the early hours of the following day, the tropical storm's winds further intensified to hurricane-force, but the wind field radius was compact;[1] by early morning, the hurricane had begun to cross southern Florida. Records indicate that the storm attained its peak intensity around this time, and started weakening later during the day.[3] It was reported that vivid lightning was sighted surrounding the eye at this point, with local meteorologists claiming the display was nearly the "most vivid they had ever seen".[2] It maintained the east-northeasterly track until the afternoon of October 13,[3] around the time when it was experimentally seeded by Project Cirrus with almost 80 pounds (36 kg) pounds of crushed dry ice along its rainbands.[4] The crew reported that there was a "pronounced modification of the cloud deck seeded," although it was unknown whether this was caused by the seeding.[5]

The hurricane subsequently weakened slightly as it took an abrupt turn west on October 14,[3]

References

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General
  • Sumner, H.C. (December 1947). "North Atlantic Hurricanes and Tropical Disturbances of 1947" (PDF). Monthly Weather Review. 75 (12). Washington, D.C.: American Meteorological Society. doi:10.1175/1520-0493(1947)075<0251:NAHATD>2.0.CO;2. ISSN 0027-0644. {{cite journal}}: Check date values in: |date= (help)
  • Jordan, C.R. (October 1947). "River Stages and Floods for October 1947" (PDF). Monthly Weather Review. 75 (10). American Meteorological Society. doi:10.1175/1520-0493(1947)075<0198:RSAFFO>2.0.CO;2. ISSN 0027-0644. {{cite journal}}: Check date values in: |date= (help)
  • Willoughby, H.E.; Jorgensen, D.P.; Black, R.A.; Rosenthal, S.L. (May 1985). "Project STORMFURY: A Scientific Chronicle — 1962–1983" (PDF). Bulletin of the American Meteorological Society. 66 (5). United States: American Meteorological Society: x–x. ISSN 1520-0477. {{cite journal}}: Check date values in: |date= (help)
  • Barnes, Jay (2007). Florida's hurricane history. Lyons, Steve (foreword) (2nd ed.). Chapel Hill, North Carolina: University of North Carolina Press. ISBN 978-0-8078-5809-7.
  • Whipple, A.B.C. (1982). Storm. Time-Life Books. ISBN 978-0809443147.
  • Davies, Pete (2000). Inside the Hurricane: Face to Face with Nature's Deadliest Storms. Henry Holt and Company. ISBN 978-0-8050-6574-9.
Specific
  1. ^ a b Sumner, p. 253
  2. ^ a b Barnes, p. 174
  3. ^ a b c d Hurricane Specialists Unit (August 2011). "HURDAT 1851 – 2010". Atlantic Oceanographic and Meteorological Laboratory. United States: Hurricane Research Division. Retrieved 2012-01-16. {{cite web}}: Check date values in: |date= (help)
  4. ^ Davies, p. 85
  5. ^ Whipple, p. 151