Table 2.

Mean bias in monthly accumulated precipitation (when compared with CPC; mm month⁻¹) and monthly averaged 2-m temperature (when compared with nClimDiv; K) for WRF-USGS, WRF-NLCD, and WRF-NLCDDEF. Variables are calculated using only land grid cells within each region.

	Monthly accumulated precipitation			Monthly averaged 2-m temperature
	WRF-USGS	WRF-NLCD	WRF-NLCDDEF	WRF-USGS	WRF-NLCD	WRF-NLCDDEF
CONUS	−3.81	−6.31	−5.14	1.38	1.53	1.43
Northeast	15.16	13.07	14.99	−1.18	−1.14	−1.28
Northern Rockics and Plains	9.01	6.53	6.92	0.42	0.48	0.49
Northwest	13.18	10.75	12.11	−1.35	−1.19	−1.23
Ohio Valley	−11.09	−15.12	−14.07	−0.26	−0.04	−0.27
South	−20.55	−22.16	−22.29	1.45	1.65	1.56
Southeast	−6.17	−11.78	−7.50	0.34	0.61	0.26
Southwest	5.61	4.74	4.67	−0.74	−0.72	−0.74
Upper Midwest	−1.41	−4.83	−3.93	−0.11	−0.05	−0.11
West	1.45	1.09	1.35	0.07	0.11	0.12