Search Results

You are looking at 21 - 26 of 26 items for :

  • Tornadogenesis x
  • Bulletin of the American Meteorological Society x
  • Refine by Access: All Content x
Clear All
Lanqiang Bai
,
Zhiyong Meng
,
Ling Huang
,
Lijun Yan
,
Zhaohui Li
,
Xuehu Mai
,
Yipeng Huang
,
Dan Yao
, and
Xi Wang

about 2.5 km to the north of camera 5. ENVIRONMENTAL FEATURES. TC environment. When Typhoon Mujigae made landfall around 1.5 h before the genesis of the Foshan tornado, it was quite strong with the maximum wind speed of greater than 50 m s −1 ( Zhao et al. 2017 ), which was favorable for tornadogenesis according to McCaul (1991; showing a mean intensity of 47.1 m s −1 for hurricanes that produced more than eight tornadoes). Located ∼350 km northeast of the TC center, the Foshan tornado was spawned

Open access
David A. Peterson
,
Edward J. Hyer
,
James R. Campbell
,
Michael D. Fromm
,
Johnathan W. Hair
,
Carolyn F. Butler
, and
Marta A. Fenn

evaluation results . J. Geophys. Res. Atmos. , 119 , 803 – 816 , doi: 10.1002/2013JD020453 . Cunningham , P. , and M. J. Reeder , 2009 : Severe convective storms initiated by intense wildfires: Numerical simulations of pyro-convection and pyro-tornadogenesis . Geophys. Res. Lett. , 36, L12812 , doi: 10.1029/2009GL039262 . Damoah , R. , and Coauthors , 2006 : A case study of pyro-convection using transport model and remote sensing data . Atmos. Chem. Phys. , 6 , 173 – 185 , doi: 10

Full access
Andrew L. Molthan
,
Lori A. Schultz
,
Kevin M. McGrath
,
Jason E. Burks
,
J. Parks Camp
,
Kelsey Angle
,
Jordan R. Bell
, and
Gary J. Jedlovec

using Landsat-5 imagery, applying PCA across the six Thematic Mapper bands at 28.5 m spatial resolution with their algorithm scoring as high as 98% accuracy against specific F-scale values. Remote sensing and aerial imagery have been used in combination with available radar data to help diagnose tornadogenesis locations and relationships to convective structure ( Skow and Cogil 2016 ). Jedlovec et al. (2006) used the MODIS aboard NASA’s Terra and Aqua , the NASA/JAXA ASTER aboard Terra , and

Free access
Ryohei Misumi
,
Yoshinori Shoji
,
Kazuo Saito
,
Hiromu Seko
,
Naoko Seino
,
Shin-ichi Suzuki
,
Yukari Shusse
,
Kohin Hirano
,
Stéphane Bélair
,
V. Chandrasekar
,
Dong-In Lee
,
Augusto Jose Pereira Filho
,
Tsuyoshi Nakatani
, and
Masayuki Maki

EnKF and ensemble-based sensitivity analysis . Mon. Wea. Rev. , 144 , 3133 – 3157 , https://doi.org/10.1175/MWR-D-15-0365.1 . 10.1175/MWR-D-15-0365.1 Yokota , S. , H. Niino , H. Seko , M. Kunii , and H. Yamauchi , 2018 : Important factors for tornadogenesis as revealed by high-resolution ensemble forecasts of the Tsukuba supercell tornado of 6 May 2012 in Japan . Mon. Wea. Rev. , 146 , 1109 – 1132 , https://doi.org/10.1175/MWR-D-17-0254.1 . 10.1175/MWR-D-17-0254.1 Yoshii , M

Free access
Bogdan Antonescu
,
David M. Schultz
,
Alois Holzer
, and
Pieter Groenemeijer

tornadoes in the United States between 1890 and 1999 and shown that damages from individual tornadoes have not increased in time, except only as result of the increasing cost of goods and accumulation of wealth. Thus, this increase in tornado damage in the recent period in Europe is likely not associated with changes in the frequency or characteristics of the environments leading to tornadogenesis, but likely due to the increase in the number of reports. However, even without significant changes in the

Full access
Amy McGovern
,
Ryan Lagerquist
,
David John Gagne II
,
G. Eli Jergensen
,
Kimberly L. Elmore
,
Cameron R. Homeyer
, and
Travis Smith

layer downsamples feature maps to half resolution, thus halving the spatial dimensions. Other convolutional and pooling layers perform similar operations. Feature maps from the last pooling layer are flattened into a length-6,400 vector (5 × 5 × 256 = 6,400), which is transformed by the three dense layers into vectors of length 404, then 20, and then 1. The sigmoid activation function of the final dense layer forces the output (tornadogenesis probability) to the range [0, 1]. During training

Full access