As March ends and temperatures warm up, snowpacks in the mountains of Oregon and Washington look very good.  Natural Resources Conservation Service snow survey numbers show the Hood and Lower Deschutes basins with 94 percent of normal for snow water equivalent, in Lower Columbia Basin it is at 109 percent, and 121 percent in the Lower Yakima basin.  Scott Oviatt of the Natural Resources Conservation Service says the key to a good water year is to avoid a quick runoff, adding the warming we are seeing now is normal.  He adds one of the important factors will be nighttime temperatures over the next couple of weeks, pointing out dropping back to around 40 degrees at night helps to preserve the snowpack.