Search Results

You are looking at 1 - 10 of 1,033 items for :

  • Operational forecasting x
  • Journal of Atmospheric and Oceanic Technology x
  • Refine by Access: All Content x
Clear All
Kyoung-Ho Cho, Yan Li, Hui Wang, Kwang-Soon Park, Jin-Yong Choi, Kwang-Il Shin, and Jae-Il Kwon

1. Introduction Operational oceanographic systems have been developed to accurately predict both present and continuous future conditions for the marginal seas of the northwestern Pacific Ocean, including the Yellow Sea, the East and South China Seas, and the East/Japan Sea ( Kagimoto et al. 2008 ; Miyazawa et al. 2008 ; You 2010 ; Dombrowsky 2011 ; Lim et al. 2011 ; Zhu 2011 ). Ocean forecast information obtained from operational forecasting systems is provided to marine industries

Full access
Nicholas J. Elmer, Emily Berndt, Gary Jedlovec, and Kevin Fuell

limb correction of MODIS and VIIRS infrared channels led to improved RGB composites, allowing for accurate interpretation by operational forecasters. The research described in this paper extends Elmer et al. (2016) to demonstrate that the same limb correction algorithm can be applied to SEVIRI, AHI, ABI, and FCI infrared imagery in order to create limb-corrected Air Mass RGB composites. 2. Data and methodology This study uses satellite imagery from the Meteosat-10 SEVIRI, Himawari-8 AHI, and

Full access
Nicholas J. Elmer, Emily Berndt, and Gary J. Jedlovec

1. Introduction Real-time visible and infrared satellite imagery provide timely information about atmospheric processes and surface conditions, making them useful tools for enhancing situational awareness in an operational forecast setting. However, the limited number of spectral channels on most operational weather satellites precludes their use for more comprehensive applications conducted with multispectral imagery from research satellites such as the Moderate Resolution Imaging

Full access
Richard M. Yablonsky, Isaac Ginis, Biju Thomas, Vijay Tallapragada, Dmitry Sheinin, and Ligia Bernardet

1. Introduction The U.S. National Oceanic and Atmospheric Administration (NOAA) Environmental Modeling Center provides real-time tropical cyclone (TC) track and intensity forecast guidance to NOAA’s National Hurricane Center. NOAA’s Hurricane Weather Research and Forecast Model (HWRF), which is a regional, dynamical TC model, became operational in 2007 after 5 years of development at the Environmental Modeling Center, in collaboration with NOAA’s Geophysical Fluid Dynamics Laboratory (GFDL) and

Full access
Scott Longmore, Steven Miller, Dan Bikos, Daniel Lindsey, Edward Szoke, Debra Molenar, Donald Hillger, Renate Brummer, and John Knaff

such as the following: Will spotter network input be included? How timely will the PRs be? How will PRs time match with radar, satellite, and observations? How will AWIPS display performance be affected during high PR-volume severe weather events? The scope of detailed feedback suggests that there exists a genuine forecaster interest for such a PR system as an operational decision aid. Previously utilized visual, photographic, and crowdsourced weather information in forecasting, decision

Full access
Chandrasekar Radhakrishnan and V. Chandrasekar

within precipitation type and cumulative lead time. 8. Summary and conclusions This research study attempted to extend the CASA’s prediction system to 6-h lead time through blending DARTS nowcast with the WRF Model forecast. Nine precipitation events were simulated and analyzed over the DFW urban area and classified into three categories of supercell, line, and multicell events. A detailed evaluation of CASA’s real-time operational reflectivity nowcast system was presented. The results showed the

Free access
P. C. Meyers, L. K. Shay, and J. K. Brewster

the hurricane boundary layer ( Emanuel 1986 ; Cione and Uhlhorn 2003 ). The previous operational climatology for the Atlantic basin, developed by Mainelli-Huber (2000) , blended older versions of the World Ocean Atlas ( WOA ) and the Generalized Digital Environmental Model (GDEM) at 0.5° resolution. Mainelli et al. (2008) used OHC as a predictor of intensity in the Statistical Hurricane Intensity Prediction Scheme (SHIPS; DeMaria et al. 2005 ), which improved intensity forecasts of category

Full access
Edward D. Zaron, Marie-Aude Pradal, Patrick D. Miller, Alan F. Blumberg, Nickitas Georgas, Wei Li, and Julia Muccino Cornuelle

. Hydraul. Eng. , 134 , 403 – 415 . Brent, R. P. , 1973 : An algorithm with guaranteed convergence for finding a zero of a function . Algorithms for Minimization without Derivatives, Prentice Hall, 47–60 . Bruno, M. S. , Blumberg A. F. , and Harrington T. O. , 2006 : The urban ocean observatory—Coastal ocean observations and forecasting in the New York Bight . J. Mar. Sci. Environ. , C4 , 31 – 39 . Chua, B. , and Bennett A. F. , 2001 : An inverse ocean modeling system . Ocean

Full access
Ricardo Martins Campos, Vladimir Krasnopolsky, Jose-Henrique G. M. Alves, and Stephen G. Penny

improvement of the operational wave ensemble compared to the deterministic run, the GWES still suffers from shortcomings that limit its skill, especially associated with systematic errors that vary with forecast time and location. The GWES currently uses the conservative arithmetic ensemble mean (EM), as shown in Eq. (1) : (1) EM = 1 n ∑ i = 1 n p i , where n is the number of ensemble members and p i is the state of the i th ensemble member. The major advantage of the conservative approach is that

Full access
D. Lynch, K. Smith, B. Blanton, R. Luettich, and F. Werner

stress) are to be applied directly, while remote or far-field baroclinic and barotropic motions are to be represented as boundary and/or initial conditions. Interior data are to be assimilated into the (local) forecast, causing appropriate adjustments to the least well known forcings. The target system is illustrated in Fig. 2 . The most reliable interior data, from an operational point of view, are the established water level time series measured at the National Ocean Service (NOS) stations along

Full access