• Line 140: The sentence beginning on this line should be a dependent clause of the one that immediately follows. Please provide a reference.

  • Line 144: The acronym is WGCM, not WGNE.

  • Line 167: What is “this” resolution, in kilometers?

  • Line 177: The Hurricane Rainband and Intensity Change Experiment (RAINEX) results show that approximately 2km may be adequate (Houze et al. 2007).

  • Line 184: In this recommendation, replace “with only minor modifications” with “within the same conceptual framework.” Insert “of weather and climate extremes” after predictions. Insert “to enhance spatial and time resolution” before “to recreate.” In addition, this recommendation should be consistent with what appears in the document (see text beginning on line 175 of the Executive Summary) and should further recommend use of, or consideration of, regional climate models.

  • Line 192: A better first sentence could be “We recommend that modeling groups make available data at the highest spatial and temporal resolution from existing simulations of the climate of the 20th and 21st century.”

  • Line 240: This example has been explored adequately in previous chapters. The committee suggests deleting the sentence on lines 240-241, and everything from “threshold” in line 244 through the end of the paragraph on line 247.

  • Line 242: What changes are “these” changes?

  • Line 250: Remove “Considering the rapid pace of climate change,” because this sentence is a statement of fact regardless of the current or future pace of climate change.

  • Line 259: The summary, while it is a straightforward statement of what needs to be done, needs editing to make it more vigorous and emphatic. Also, need to emphasize the need not only for scientists and users to communicate, but in this case, the weather and climate communities need to learn to talk to one another.

  • Line 329: Figure 1 would be improved if the text in the boxes is replaced with single words, such as “Observations”, “Models”, “Understanding”, “Impacts”, “Adaptation and Mitigation”.

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