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Other systems

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Louisiana flood system

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The system responsible for the floods over Louisiana on August 12. Notice that it has somewhat of a circulation center.

In mid-August, an area of low pressure helped spawn a mesoscale convective system over the state of Louisiana which dumped historic amounts of rainfall over the affected areas, with several picking up over 2 feet (24 in) of rainfall. Although it was never classified as a tropical cyclone, many believed that it had characteristics of one, mainly while it existed on August 12.[1]

The system was, for a few days, monitored by the National Hurricane Center (NHC) in their respective Tropical Weather Outlooks (TWO). It was initially first monitored for potential tropical cyclogenesis on August 5 while it was in the northeastern Gulf of Mexico.[2] Over the next day or two, the low meandered erratically while slowly drifting northwards towards the Florida Panhandle without development. It was later dropped from the outlook on August 7 as it moved inland, as development was not expected.[3] The low slowed down and turned west as it hugged the Gulf Coast. Despite not being anticipated to develop, the NHC again monitored the system, this time for unknown reasons on August 9.[4] By August 12, a weak surface circulation became visible and the system was described in a statement by the Weather Prediction Center (WPC) as a "sheared inland tropical depression".[5][1] Eventually, the system dissipated on August 15.

In total, the system caused between $10–15 billion (2016 USD) in damages, making it one of the most costly natural disasters to occur in the United States in 2016, with the other being Hurricane Matthew.

Bay of Biscay cyclone

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The Bay of Biscay cyclone on September 15

On September 15, Météo-France began monitoring a cyclone in the Bay of Biscay that they claimed was subtropical, having apparently possessing an asymmetric wind field of tropical-storm force winds and a warm thermal core.[6][7] The system drifted southeastwards, attaining a peak intensity of 996 millibars (29.4 inHg),[7] and eventually made landfall near the border of Spain and France, rapidly weakening and eventually dissipating shortly thereafter early on September 16.[8] In some areas along the coastline, winds gusted up to 120 km/h (75 mph), however damage was relatively minimal.[citation needed]

The Free University of Berlin, in accordance with their naming of cyclones that affect their area, named the cyclone "Stephanie".[9]

"69L.NEWTEST"

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Invest "69L.NEWTEST" on November 3

On November 1, the National Hurricane Center (NHC) began to monitor an area of low pressure a few hundred miles east-northeast of the Lesser Antilles until it dropped the low from its Tropical Weather Outlook (TWO) on November 3.[10] Although the disturbance never developed into a tropical cyclone, the system was apparently assigned the investigation name "69L.NEWTEST". Normally, invests are numbered by the NHC from 90 to 99, respectively.[11] However, the reason for the naming is currently unknown at this time.

  1. ^ a b "Why the Louisiana Flood Happened, And 4 Other Things to Know". The Weather Channel. 15 August 2016. Retrieved 14 February 2017.
  2. ^ "Tropical Weather Outlook". National Hurricane Center. 5 August 2016. Retrieved 14 February 2017.
  3. ^ "Tropical Weather Outlook". National Hurricane Center. 7 August 2016. Retrieved 14 February 2017.
  4. ^ "Tropical Weather Outlook". National Hurricane Center. 9 August 2016. Retrieved 14 February 2017.
  5. ^ https://twitter.com/StuOstro/status/764115735941640192?ref_src=twsrc%5Etfw
  6. ^ BFMTV. "Une dépression subtropicale dans le Golfe de Gascogne: " Un phénomène inédit "". bfmtv.com. Retrieved 6 February 2017.
  7. ^ a b "Current ESTOFEX Convective Forecasts - ESTOFEX". estofex.org. Retrieved 6 February 2017.
  8. ^ Barbery, Mathieu. "Archives - résultat de la recherche - Météo60". meteo60.fr. Retrieved 6 February 2017.
  9. ^ http://www.met.fu-berlin.de/de/wetter/maps/Prognose_20160912.gif
  10. ^ "Tropical Weather Outlook". National Hurricane Center. 2 November 2016. Retrieved 13 February 2017.
  11. ^ Franklin, James (July 31, 2014). "Investing for Meteorologists". Miami, Florida: United States National Oceanic and Atmospheric Administration's National Weather Service's National Hurricane Center. Retrieved 1 August 2014.