Aircraft Triggered Lightning Caused by Winter Thunderclouds in the Hokuriku Coast, Japan -A Case Study of a Lightning Strike to Aircraft below the Cloud Base-

Kobayashi, Fumiaki; Shimura, Takatsugu; Masuda, Keisuke

doi:10.2151/sola.2007-028

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…In all cases, the number of sferics was much lower than that which would be seen for a typical summertime thunderstorm. In the majority of cases, it appears that helicopter‐triggered lightning strikes have occurred in cold air convective outbreaks or in cold air situations. This is in agreement with the case of fixed‐wing aircraft‐triggered lightning described by Kobayashi et al (). A typical North‐Sea cold air outbreak is described in Section…”

Section: Synoptic Analysis Of Helicopter Triggered Lightning Striksupporting

confidence: 92%

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Investigation and prediction of helicopter‐triggered lightning over the North Sea

Wilkinson¹,

Wells²,

Field³

et al. 2012

Meteorological Applications

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Helicopter-triggered lightning is a phenomenon which affects operations over the North Sea during the winter. It is thought that the presence of the helicopter triggers the majority of lightning strikes, since there is generally little or no natural lightning activity in the area in question prior to or following the strike, and strike rates are much higher than would be expected if due purely to chance. However, there has been little progress to date in the ability to predict triggered lightning strike occurrence with NWP data. Previous attempts have resulted in forecasts which are insufficiently discriminating (i.e. high false alarm rate) to be of practical use.In this study, previous work on triggered lightning is reviewed and case studies are examined in order to identify common meteorological conditions for helicopter-triggered lightning strikes. Using forecast data from the Met Office Unified Model, an algorithm for triggered lightning risk was produced based on outside air temperature and precipitation rate. Evaluation against past helicopter strike cases has demonstrated that the new algorithm successfully forecasts lightning risk on 80% of occasions when triggered lightning occurred. In addition, the algorithm correctly forecast 8/9 natural lightning strikes which were observed in the operating area during winter 2010-2011. The areas of risk highlighted are usually small, which should allow helicopter operators to plan flights around high risk regions. The information in this study can also be used to inform helicopter operators of the likely conditions in which triggered lightning strikes occur.

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Section: Synoptic Analysis Of Helicopter Triggered Lightning Striksupporting

confidence: 92%

“…The algorithm has the potential to warn of Cb activity for other purposes (e.g. to limit take‐off of at airfields such as Komatsu airbase, in Kobayashi et al , ), but this has not been tested in the present paper.…”

Section: Discussionmentioning

confidence: 99%

Investigation and prediction of helicopter‐triggered lightning over the North Sea

Wilkinson¹,

Wells²,

Field³

et al. 2012

Meteorological Applications

View full text Add to dashboard Cite

show abstract

“…Over 95% of the total cases occurred from May to September with a peak in July to August. Although winter lightning sometimes causes damage to outdoor equipment and aircraft (Kobayashi et al, 2007), it appears to be of a lesser threat to life. This may be because of low outdoor activity in winter, as well as the sparsity of flashes in winter thunderstorms (Hayashi and Marui, 2016; Fig.…”

Section: Fig7mentioning

confidence: 99%

Long-term Change in Lightning Mortality and Its Relation to Annual Thunder Days in Japan

Fujibe

2017

Journal of Natural Disaster Science

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Long-term variations in annual lightning deaths in Japan were examined in relation to the number of thunder days, on the basis of death statistics for 1909 to 2014, and police data for 1968 to 2009. The number of lightning deaths was mostly 20 to 60 people without a remarkable trend before World War II, while it rose to over 100 just after the war, and then decreased during the latter half of the 20th century to less than 10 in recent decades. For the period before 1970, the number of annual lightning deaths was positively correlated with that of warm-season thunder days (averaged over 39 stations) with a correlation coefficient exceeding 0.5. The correlation became low and insignificant after the 1980s as lightning mortality decreased, although a high correlation of 0.6-0.8 was maintained between lightning damages and thunder days. There was also a positive correlation of 0.4-0.6 between lightning deaths and warm-season mean temperature until the 1980s, corresponding to a weak correlation between thunder days and temperature.

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Long term statistics of aircraft lightning strikes and thunder days at Komatsu airport

Suzuki,

Hirano,

Taniguchi

et al. 2022

JAE

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Aircraft Triggered Lightning Caused by Winter Thunderclouds in the Hokuriku Coast, Japan -A Case Study of a Lightning Strike to Aircraft below the Cloud Base-

Cited by 3 publications

References 6 publications

Investigation and prediction of helicopter‐triggered lightning over the North Sea

Investigation and prediction of helicopter‐triggered lightning over the North Sea

Long-term Change in Lightning Mortality and Its Relation to Annual Thunder Days in Japan

Long term statistics of aircraft lightning strikes and thunder days at Komatsu airport

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