; (B) makes usable, reliable, and timely forecasts of floods; (C) assesses the severity of flood conditions and effects; (D) issues flood watches and warnings when necessary; (E) provides information described in subparagraph (A), forecasts described in subparagraph (B), and assessments described in subparagraph (C) at the national, regional, and local levels, as appropriate; and (F) communicates flood forecasts, flood conditions, and flood impacts to public and private entities engaged in flood planning, preparedness, and response, including— (i) decision makers at the Federal, State, local, and Tribal levels of government; (ii) the private sector; and (iii) the public; (2) provide timely data, information, and products that reflect differences in flood conditions among localities, regions, watersheds, and States; (3) coordinate and integrate, through interagency agreements as practicable, Federal research and monitoring in support of the flood early warning information system provided under paragraph (1); (4) use existing forecasting and assessment programs and partnerships; (5) make improvements in seasonal precipitation and temperature, subseasonal precipitation and temperature, and flood water prediction; and (6) continue ongoing research and monitoring activities relating to floods, including research activities relating to— (A) the prediction, length, severity, and impacts of floods and improvement of the accuracy, timing, and specificity of flash flood warnings; (B) the role of extreme weather events and climate variability in floods; and (C) how water travels over and through surfaces. (c) Partnerships The Under Secretary, through the National Integrated Flood Information System, may— (1) engage with the private sector to improve flood monitoring, forecasts, land and topography data, and communication, if the Under Secretary determines that such engagement is appropriate, cost effective, and beneficial to the public and decision makers described in subsection (b)(1)(F)(i)