Ellrod Weather Consulting (EWxC), LLC

Ellrod Weather Consulting (EWxC), LLC

Gary P. Ellrod:  Selected Publications

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Journal articles | Tech notes | Conference papers

Peer Reviewed Journals / Book Chapter:

Lynn, B. H., G. Kelman, and G. Ellrod, 2014: An Evaluation of the Efficacy of Using Observed Lightning to Improve Convective Lightning Forecasts. Weather and Forecasting, 30, 407-423.

Ellrod, G.P., Knox, J.A., Lester, P.F., Ehernberger, L.J., 2015. Aviation: Clear Air Turbulence. In: Gerald R. North (editor-in-chief), John Pyle and Fuqing Zhang (editors). Encyclopedia of Atmospheric Sciences, 2nd edition, Vol 1, pp. 177–186.

__________, A. R. Lupo, P. Roohr, K. Lavin, and S. W. Harned, 2012: National Weather Digest: More Than Three Decades of Service to the Meteorological Community. National Weather Digest, 36, 163-168.

__________ and J. A. Knox, 2010: Improvements to an Operational Clear-Air Turbulence Diagnostic Index by Addition of a Divergence Trend Term. Weather and Forecasting, 25, 789-798.

__________ and A. A. Bailey, 2006: Assessment of aircraft icing potential and maximum icing altitude from geostationary meteorological satellite data. Weather and Forecasting, 22, 160-174.

__________ and S. A. Lindstrom, 2006: Performance of Satellite Fog Detection Techniques with Major, Fog-related Highway Accidents. NWA Electronic Journal, of Operational Meteorology, 3, 1-13.

__________ and A. J. Schreiner, 2004: Volcanic ash detection and cloud top height estimates from the GOES-12 Imager: Coping without a 12 micrometer infrared band, Geophysical Res. Letters, 31, August 11, 2004.


Pryor, K. L. and G. P. Ellrod, 2004: Recent Improvements to the GOES Microburst Products. Weather and Forecasting, 19, 582-594.

Ellrod, G. P., 2004: Impact on Volcanic Ash Detection Caused by the Loss of the 12.0 micrometer “Split Window” Band on GOES Imagers, in: Volcanic Observations from Space: New Results from the EOS Satellite Instruments, Journal of Volcanology and Geothermal Research, 135 (1-2), 91-103, Elsevier Press, Amsterdam.

Underwood, J., G. P. Ellrod and A. Kuhnert, 2004: A Multiple Case Analysis of Nocturnal Radiation Fog Development in the Central Valley of California Utilizing the Night Time Fog Product. J. Applied Meteor., 43, 297-311.

Ellrod, G. P., 2003: Estimation of Low Cloud Base Heights at Night Using GOES Infrared and Surface Temperature Data. National Weather Digest, 26 (1-2), 39-44.

__________, B. H. Connell, and D. W. Hillger, 2003: Improved Detection of Airborne Volcanic Ash Using Multispectral Infrared Satellite Data, J. Geophys. Res -Atmosphere, 108, No. D12, 4356.

Hillger, D. W. and G. P. Ellrod, 2003: Detection of Important Atmospheric and Surface Features by Employing Principal Component Image Transformation of GOES Imager. J. Appl. Meteor, 42, 611-629.


Ellrod, G. P., P. F. Lester, and L. J. Ehernberger, 2002: Clear Air Turbulence in: Encyclopedia of Atmospheric Science, Academic Press, Elsevier, Inc., 11 pp.

__________,  J. P. Nelson,,  M. R. Witiw, L. Bottos, W. P. Roeder, 2000: Experimental GOES Sounder Products for the Assessment of Downburst Potential. Weather and Forecasting: 15, 527–542.

__________, 2000: Satellite Images Provide Valuable Information Supplement to the Aviation Meteorologist. ICAO Journal, 55, No. 2 (March), 6-10, 27.

__________, 1999: The use of GOES Sounder Imagery for the Detection of Hazardous Volcanic Ash Plumes. National Weather Digest, 22, No. 4, National Weather Association, Montgomery, Alabama, 3-9.

__________, R.V. Achutuni, J. M. Daniels, E. M. Prins, and J. P. Nelson, III, 1998: An Assessment of GOES-8 Imager Data Quality. Bulletin of Amer. Meteor. Soc., 79, 2509-2526.

__________,  1995: Advances in the Detection and Analysis of Fog at Night Using GOES Multispectral Infrared Imagery. Weather and Forecasting: 10, 606–619.

A. J. Schreiner, D. A. Unger, W. P. Menzel, G. P. Ellrod, K. I. Strabala and J. L. Pellet. 1993: A Comparison of Ground and Satellite Observations of Cloud Cover. Bulletin of the Amer. Meteor. Soc: 74, 1851–1861.

Ellrod, G. P. and D. I. Knapp. 1992: An Objective Clear-Air Turbulence Forecasting Technique: Verification and Operational Use. Weather and Forecasting: 7, 150–165.

__________, 1990: A water vapor image feature related to severe thunderstorms. National Weather Digest, 10, 21-29.

Ellrod. 1989: Environmental Conditions Associated with the Dallas Microburst Storm Determined from Satellite Soundings. Weather and Forecasting: 4, 469–484.

Technical Reports:

Ellrod, G. P., R. Helz, and G. Wadge, 2001: Volcanic Hazard Assessment, CEOS Disaster Management Support Group, Final Report. NOAA/NESDIS.  

__________, 1994: Detection and analysis of fog at night using GOES multispectral infrared imagery. NOAA Tech. Report NESDIS 75, U. S. Dept. of Commerce, Washington, DC, 22 pp.

__________, 1990: The Use of Water Vapor Imagery to Identify Clear Air Turbulence. Satellite Applications Information Note 90/8, U.S. Dept. Of Commerce, 9 pp.

__________, 1989: A decision tree approach to clear air turbulence analysis using satellite and upper air data.  NOAA Tech. Memo. NESDIS 23, U. S. Dept. of Commerce, Washington, DC, 20 pp.

_________, 1985: Detection of high level turbulence using satellite imagery and upper air data. NOAA Tech. Memo. NESDIS 10, U. S. Dept. of Commerce, Washington, DC, 30 pp.

Selected Conference Papers:

Ellrod, G. P., 2015: Prediction of Summer Stratus in the San Francisco Bay Aided by Low Level HYSPLIT Trajectories. Poster BP23, 40th National Weather Association (NWA) Annual Meeting, 18-22 Oct. 2015, Oklahoma City, OK.

Ellrod, G. P., 2015: Use of the NOAA HYSPLIT Trajectory Model for the Short Range Prediction of Coastal Stratus and Fog. (Poster, Extended Abstract) 17th AMS Conference on Aviation, Range, and Aerospace Meteorology (ARAM). 5-8 Jan. 2015, Phoenix, AZ.

Ellrod, G. P., 2013: Use of the NOAA HYSPLIT Trajectory Model for the Short Range Prediction of Stratus and Fog. 38th National Weather Association Annual Meeting, 13-17 Oct. 2013, Charleston, SC.

Knox, J. A., G. P. Ellrod, S. Silberberg, and E. Wilson, 2011: Performance of the Ellrod-Knox and Lighthill-Ford-Knox clear air turbulence algorithms at the Aviation Weather Center. 15th AMS Conference on Aviation, Range, and Aerospace Meteorology, 31 July - 4 August, 2011, Los Angeles, CA.

Knox, J. A., G. P. Ellrod, and P. D. Williams, 2006: Improved clear air turbulence diagnostics based on adjustment dynamics. 12th AMS Conf. On Aviation, Range, and Aerospace Meteorology, 30 Jan. - 2 Feb. 2006, Atlanta, GA.

Ellrod, G. P., 2006: Evaluation of Moderate-Resolution Imaging Spectroradiometer (MODIS) Shortwave Infrared Bands for Optimum Nighttime Fog Detection. 14th AMS Conference on Satellite Meteorology and Oceanography, 30 Jan. - 2 Feb. 2006, Atlanta, GA.

__________ 2004: Detection of Hazardous Fog at Night Using Data From Meteorological Satellites and Surface Reporting Stations. National Highway Visibility Conference, 18-19 May 2004, Madison, WI.

___________and A. Schreiner, 2004: A first look at volcanic ash detection in the GOES-12 era. 11th AMS Conf. On Aviation, Range and Aerospace Meteorology, 4-8 Oct. 2004, Hyannis, MA.

__________ and A. Bailey, 2004: 'ICECAP': A GOES image product depicting aircraft icing potential and maximum icing altitude. 11th AMS Conf. On Aviation, Range and Aerospace Meteorology, 4-8 Oct. 2004, Hyannis, MA.

A. Schreiner, T. J. Schmit, G. P. Ellrod, and F. Prata, 2004: Can upper level SO2 be monitored using the GOES Sounder? 13th AMS Conf. On Satellite Meteorology and Oceanography, 20-23 Sep. 2004, Norfolk, VA.

Ellrod, G. P. and S. Bachmeier, 2003: Inter-comparison of GOES and MODIS imagery in the analysis of fog and stratus. 12th Conf. On Satellite Meteor. And Oceanography, 10-13 Feb. 2003, Long Beach, CA.

__________, and J. S. Im, 2003: Development of volcanic ash image products using MODIS multi-spectral data. 12th Conf. On Satellite Meteor. And Oceanography, 10-13 Feb. 2003, Long Beach, CA.

__________, 2000: Global climatology of clear air turbulence activity deduced from a numerical model index. 9th AMS Conf. On Aviation, Range, and Aerospace Meteor., 11-15 Sep. 2000, Orlando, FL.

__________, 1987: Identifying High Altitude Mountain Wave Turbulence and Strong Chinook Wind Events with Satellite Imagery. AIAA 25th Aerospace Sciences Meeting, January 12-15, 1987, Reno, NV, Paper #0183.

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