Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 415 PM EDT Wed Oct 30 2024 Valid 00Z Thu Oct 31 2024 - 00Z Sat Nov 02 2024 ...Temperatures will be 20 to 30 degrees above average over parts of the Great Lakes,Ohio Valley, and the Northeast... ...The Pacific Northwest will be unsettled as areas of low pressure move through the region and bring coastal rain and mountain snow... ...There will be a potential for some heavy rain and locally strong thunderstorms over the central and southeastern U.S. the next couple of days.... A strong surface high pressure centered in the Carolinas will lead to anomalously warm temperatures across much of the Ohio and Tennessee Valleys for the remainder of Wednesday and the East Coast on Thursday. Many stations may eclipse daily record high temperatures with highs ranging from the middle 80s in Kentucky to near 80 in Michigan for the remainder of today. On Thursday, Halloween, much of the northeast will be clear and quite warm as more stations approach or break daily record high temperatures with the thermometer approaching the low 80s. As stated in the key message, this is as much as 20-30 degrees above average so wear a cool costume if celebrating the holiday across the east. The temperatures should start to moderate across the Ohio Valley to the East Coast as a front clears the region and brings the chance for rain on Friday. Meanwhile, the West Coast will be cool and rainy the next several days with the passage of a couple of frontal lows. High temperatures look be in the low to middle 50s across the coastal regions and interior locations, especially high elevations, may be in the 40s and 30s.Through Friday night, the QPF forecast calls for several inches of rainfall to be possible, most likely in the 2-4 inch range. Not all precipitation will be rain. The cold front will bring falling snow level heights and mountain snow to the ranges of Washington, Oregon, and northern California. As the system moves eastward Thursday, the snow potential will increase for eastern Oregon, Nevada, and Idaho. As much as a foot of snow may fall in the mountain ranges of eastern Oregon and Idaho. In between the cool air in the west and warm in the east, the central U.S. will be prime for strong thunderstorms and an isolated flash flooding threat. For the remainder of the day Wednesday, the Storm Prediction Center has a Enhanced Risk for severe weather across eastern Kansas, Oklahoma, and western Missouri. Hazards include strong winds, large hail, and perhaps a strong tornado or two. The severe threat should decrease Thursday as the storms move eastward from Texas to Illinois, but the threat for some gusty winds remain. The threat for some severe weather exists again on Friday across the southwestern Plains as a trough enters the region and conditions look more favorable for potential hail. In addition to severe weather, there does exist some opportunity for some areas to see flash flooding. The southern Mississippi River valley is under a Marginal Excessive Rainfall outlook on Thursday and eastern New Mexico, Oklahoma, and north Texas are under a Marginal Excessive Rainfall Outlook on Friday. It is possible any locally heavy thunderstorm could drop more than 2 inches of rainfall. For areas not included in the discussion,much of the Southwest will be pleasantly mild and mostly dry with high temperatures in the 70s and low 80s. The southeast will be warm and humid with highs in the 80s with some isolated thunderstorms possible along the Florida Atlantic Coast. Wilder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php