U.S. Summer Temperatures and RainfallSeptember 3rd, 2014 at 10:55 am by Bill Steffen under Bill's Blog, Weather
Click on the images to enlarge. The first two maps are U.S. temperature difference from average and U.S. rainfall difference from average for the meteorological summer (June 1 – August 31) (from the High Plains Regional Climate Center). Much of the U.S. east of the Rockies has had average to above average rainfall. In general, it has been timely. So, we’re headed toward another great harvest this fall across much of the U.S. Warm conditions prevailed in the Western U.S. and the drought continues in California. Since agricultural crops are generally irrigated in the West, crops there are not as bad off as the drought would suggest. Note that the summer has brought average to above average rainfall to much of Arizona, Nevada and up toward Washington State. The drought monitor shows the drought in California and the barren and sparsely populated areas of NE Oregon and western Nevada. The drought has eased a little over parts of the Southern Plains. Warmer than average surface water temperatures off the West Coast of the U.S. would argue for a mean ridge over that area and a downstream trough over the Central U.S. Some of the parameters that led to cold and snowy conditions last winter have not changed. As I have said since spring, the El Nino (warmer than average surface water temperatures along the Equator west of S. America) is and will continue to be weak. While strong El Ninos usually mean warm winters in the Northern U.S. (Great Lakes), weak El Ninos often bring a fair amount of cold and snow (1977-78) from the N. Plains to the Northeast. I still think winter comes a little earlier this year. Your snow shovel should be at the ready by early November. Check out the current webcam from Barrow, Alaska (thanks, Mary for the heads up on this). The high temperature yesterday in Barrow was 34. Currently, they report a west wind at 22 mph and a wind chill factor of 19.
Also, snow falling last night SW of Calgary, Alberta on Hiway 22…The hottest temperature of the year occurred Tuesday in New York City, reaching 92 F…the Tigers have won 8 out of their last 11.