Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 353 AM EDT Tue Jun 04 2019 Valid 12Z Tue Jun 04 2019 - 12Z Thu Jun 06 2019 ...Severe weather and heavy rain threats possible Tuesday across the Central U.S. and the Ohio Valley to Mid-Atlantic on Wednesday... ...Heavy to excessive rainfall likely for parts of the west-central Gulf Coast into the Lower Mississippi Valley beginning on Tuesday and into Thursday... ...Much above normal temperatures continue from California to the Northern Plains... Severe weather and heavy rainfall will again be a threat on Tuesday across parts of the Central U.S. as a stubborn upper level low parked over the Desert Southwest begins to finally shift eastward on Wednesday. Both SPC and WPC highlight slight risks for severe thunderstorms and excessive rainfall/flash flooding, respectively, on Tuesday across parts of the Southern High Plains and the Middle to Upper Mississippi Valley. A northern stream system crossing the Great Lakes on Wednesday will shift the severe weather threat into parts of the lower Ohio Valley and the Mid-Atlantic, with locally heavy rainfall also possible. The big story however is regarding a broad area of low pressure in the western Gulf of Mexico bringing a swath of tropical moisture into parts of the western Gulf Coast states. Heavy rainfall is likely beginning on Tuesday and through Wednesday across parts of eastern Texas and the lower Mississippi Valley. WPC has highlighted parts of southeast Texas, including the Houston metro area, within a moderate risk for flash flooding. See the excessive rainfall outlooks from WPC for more details. Heavy rains also shift north and eastward on Thursday as well, beyond the short range period. Well above normal temperatures (departures +10 to +20 degrees) will persist Tuesday and Wednesday across parts of California, the Northwest, and Northern Plains with daytime highs in the mid-80s to near 90 expected. Temperatures well into the 90s are forecast across the Central Valley of California. In the East, the Canadian sourced high pressure that brought cool and dry conditions will move off the Mid-Atlantic coast on Tuesday, with more summer like weather returning by Wednesday. The Southern Rockies to Southern Plains should be near to below normal underneath the upper level trough. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php