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This paper presents the automation, website interface, and verification of the Stevens Flood Advisory System (SFAS, http://stevens.edu/SFAS). The fully-automated, ensemble-based flood advisory system dynamically integrates real-time observations and river and coastal flood models forced by an ensemble of meteorological models at various scales to produce and serve street scale flood forecasts over urban terrain. SFAS is applied to the Greater NY/NJ Metropolitan region, and is used routinely by multiple forecast offices and departments within the US National Weather Service (NWS), regional and municipal Offices of Emergency Management, as well as the general public. Every six hours, the underlying H3E (Hydrologic–Hydraulic–Hydrodynamic Ensemble) modelling framework, prepares, runs, data-assimilates, and integrates results from 375 dynamic model simulations to produce actionable, probabilistic ensemble forecasts of upland and coastal (storm surge) flooding conditions with an 81-h forecast horizon. Meteorological forcing to the H3E models is provided by 125 weather model ensemble members as well as deterministic weather models from major weather agencies (NCEP, ECMWF, CMC) and academia. The state-of-the-art SFAS, a replacement of the well-known, but deterministic, Storm Surge Warning System (SSWS) that was highlighted during Hurricanes Irene and Sandy and more recently extratropical cyclone Jonas, has been operational since the end of 2015.
early warning systems, emergency management, ensemble forecast, flood advisory system, integrated flood forecasts, river flooding, storm surge
[1] NWS, United States Flood Loss Report – Water Year 2014, available at: http://www. nws.noaa.gov/hic/summaries/WY2014.pdf (accessed 01 Febuary 2016), 2014.
[2] Georgas, N., Orton, P., Blumberg, A., Cohen, L., Zarrilli, D. & Yin, L., The impact of tidal phase on hurricane sandy’s flooding around New York City and Long Island Sound. Journal of Extreme Events, 1(01), p. 1450006, 2014.
[3] Botts, H., Du, W., Jeffery, T., Kolk, S., Pennycook, Z. & Suhr, L., CoreLogic Storm Surge Report 2015, Irvine, CA. p. 44, 2015.
[4] Schubert, C.E., Busciolano, R., Hearn Jr, P.P., Rahav, A.N., Behrens, R., Finkelstein, J., Monti Jr, J. & Simonson, A.E., Analysis of Storm-Tide Impacts from Hurricane Sandy in New York, US Geological Survey, 2015.
[5] Blake, E.S., Kimberlain, T.B., Berg, R.J., Cangialosi, J. & Beven II, J.L., Tropical cyclone report: Hurricane Sandy, National Hurricane Center, 12, pp. 1–10, 2013.
[6] Anderson, M.L., Chen, Z.Q., Kavvas, M.L. & Feldman, A., Coupling HEC-HMS with atmospheric models for prediction of watershed runoff. Journal of Hydrologic Engineering, 7(4), pp. 312–318, 2002. http://dx.doi.org/10.1061/(ASCE)1084-0699(2002)7:4(312)
[7] USGS, January 22–24, 2016 Summary of Coastal Flooding in New Jersey Caused by the Nor’easter, available at: http://nj.usgs.gov/hazards/flood/flood1601/ 2016.
[8] Villarini, G. & Goska, R., Smith, J.A. & Vecchi, G.A., North atlantic tropical cyclones and U.S. flooding. Bulletin of the American Meteorological Society, 95(9), pp. 1381– 1388, 2014. http://dx.doi.org/10.1175/BAMS-D-13-00060.1
[9] Berg, R., National Hurricane Center Tropical Cyclone Report Hurricane Joaquin (AL112015) 28 September – 7 October 2015, available at: http://www.nhc.noaa.gov/ data/tcr/AL112015_Joaquin.pdf. 2016.
[10] Lumia, R., Firda, G.D. & Smith, T.L., Floods of 2011 in New York: U.S. geological survey scientific investigations report 2014–5058, p. 236, avaialble at: http://dx.doi. org/10.3133/sir20145058. 2014.
[11] Orton, P., Georgas, N., Blumberg, A. & Pullen, J., Detailed modeling of recent severe storm tides in estuaries of the New York City region. Journal of Geophysical Research: Oceans, 117(C9), 2012. http://dx.doi.org/10.1029/2012JC008220
[12] Noe, R.M., Casey-Lockyer, M., Mertzlufft, C., Heick, R., Yard, E. & Wolkin, A., Deaths associated with hurricane sandy. Morbidity and Mortality Weekly Report (MMWR) Centers for Disease Control and Prevention, 62(20), pp. 393–397, 2013, available at: http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6220a1.html. 2013.
[13] Weaver, J., Harkabus, L.C., Braun, J., Miller, S., Cox, R., Griffith, J. & Mazur, R.J., An overview of a demographic study of united states emergency managers. Bulletin of the American Meteorological Society, 95(2), pp. 199–203, 2014. http://dx.doi.org/10.1175/BAMS-D-12-00183.1
[14] Hoss, F. & Fischbeck, P., Increasing the value of uncertain weather and river forecasts for emergency managers. Bulletin of the American Meteorological Society, 97(1), pp. 85–97, 2016. http://dx.doi.org/10.1175/BAMS-D-13-00275.1
[15] Di Liberto, T., Colle, B.A., Georgas, N., Blumberg, A.F. & Taylor, A.A., Verification of a multimodel storm surge ensemble around New York City and Long Island for the cool season. Weather and Forecasting, 26(6), pp. 922–939, 2011. http://dx.doi.org/10.1175/WAF-D-10-05055.1
[16] Saleh, F., Ramaswamy, V., Georgas, N., Blumberg, A. & Pullen, J., A Retrospective streamflow ensemble forecast for an extreme hydrologic event: a case study of Hurricane Irene and on the Hudson River basin. Hydrology and Earth System Sciences, 2016, pp. 1–29, 2016. http://dx.doi.org/10.5194/hess-20-2649-2016
[17] Marsooli, R., Orton, P.M., Mellor, G., Blumberg, A.F., Georgas, N.A., Coupled WaveCirculation Model for Numerical Simulation of Storm Tides and Waves, Ocean Modeling, Submitted.
[18] http://www.weather.gov/media/phi/veteransday2009_pres.pdf.
[19] Georgas, N. & Blumberg, A., Establishing confidence in marine forecast systems: the design and skill assessment of the New York Harbor observation and prediction system, version 3 (NYHOPS v3). Estuarine and Coastal Modeling, 660-685. 2010.
[20] Georgas, N., Blumberg, A.F., Bruno, M.S. & Runnels, D.R., Marine forecasting for the New york urban waters and harbor approaches: the design and automation of NYHOPS. In 3rd International Conference on Experiments/Process/System Modelling/Simulation & Optimization. Demos T. Tsahalis, Ph. D., University of Patras, Greece, 2009.
[21] NWS, Service Assessment: Hurricane/Post-Tropical Cyclone Sandy. October 22–29, 2012, Silver Spring, MD, USA: National Oceanic and Atmospheric Administration National Weather Service. 2013.
[22] NWS, National Weather Service Manual 10-950, DECEMBER 4, 2012, Operations and Services Hydrologic Services Program, NWSPD 10-9, available at: http://www.nws.noaa.gov/directives/. 2012.
[23] http://hudson.dl.stevens-tech.edu/SFAS/SFAS_Latest_News.pdf.
[24] Molteni, F., Buizza, R., Palmer, T.N. & Petroliagis, T., The ECMWF ensemble prediction system: Methodology and validation. Quarterly Journal of the Royal Meteorological Society, 122(529), pp. 73–119, 1996. http://dx.doi.org/10.1002/qj.49712252905
[25] http://www.spc.noaa.gov/exper/sref/
[26] https://www.ncdc.noaa.gov/data-access/model-data/model-datasets/global- ensembleforecast-system-gefs.
[27] http://www.ncdc.noaa.gov/data-access/model-data/model-datasets/global-forcast- system-gfs.
[28] http://www.ncdc.noaa.gov/data-access/model-data/model-datasets/north-americanmesoscale-forecast-system-nam.
[29] http://rucool.marine.rutgers.edu/COOL-Data/ruwrf-model-output.
[30] https://weather.gc.ca/ensemble/index_e.html.
[31] Blumberg, A.F., Georgas, N., Yin, L., Herrington, T.O. & Orton, P.M., Street-scale modeling of storm surge inundation along the New Jersey Hudson river waterfront. Journal of Atmospheric and Oceanic Technology, 32(8), pp. 1486–1497, 2015.
[32] McEnery, J., Ingram, J., Duan, Q., Adams, T. & Anderson, L., NOAA’S advanced hydrologic prediction service: building pathways for better science in water forecasting. Bulletin of the American Meteorological Society, 86(3), pp. 375–385, 2005. http://dx.doi.org/10.1175/BAMS-86-3-375
[33] Adams, T., Verification of the NOAA/NWS MMEFS Operational Hydrologic Ensemble Forecasting System in the Ohio River Valley. World Environmental and Water Resources Congress 2015 at Floods, Droughts, and Ecosystems, pp. 2688–2700, 2015.
[34] http://www.stormsurge.noaa.gov/models_obs_modeling.html.
[35] https://ams.confex.com/ams/96Annual/webprogram/Paper279348.html.