Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 329 AM EDT Tue May 9 2017 Valid 12Z Tue May 9 2017 - 12Z Thu May 11 2017 ...Unsettled conditions for the Southwest and New England, and mainly dry for the Gulf Coast states and the West Coast... The weather pattern through the middle of the week will continue to be featured by an upper level ridge across the central U.S., and upper level lows over both the Desert Southwest and New England. This is an omega block pattern and is typically slow to change compared to a less amplified flow aloft. The upper low is forecast to reach the central Plains by Thursday morning whilst the New England low slowly moves offshore. In terms of sensible weather impacts, expect scattered to numerous showers and thunderstorms from Arizona to the central Plains, with the greatest rainfall amounts likely from eastern Colorado to northern Missouri. Severe weather will be possible from Texas to Kansas with moisture returning northward from the Gulf of Mexico, and the Storm Prediction Center has additional details on that. Temperatures are forecast to be well below average for the Desert Southwest and southern Rockies, which can otherwise be quite warm for this time of year. Across the eastern U.S., temperatures are also expected to be below average through mid-week compared to early May standards. This will especially be the case across the Northeast U.S. and the Great Lakes region, where frost and freeze advisories/warnings are in effect for the overnight hours. The best prospects for precipitation will be across Maine where the core of the upper level low will likely reside. Warm and dry conditions will prevail across the Gulf Coast region with high pressure in charge of the weather pattern there. D. Hamrick Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php