Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 138 PM EDT Thu May 29 2025 Valid 00Z Fri May 30 2025 - 00Z Sun Jun 01 2025 ...Dangerous heat expected in the Southwest Friday and Saturday... ...Excessive rainfall is constrained to the southern and eastern portions of the country through Saturday... The general flow pattern features a deepening upper level trough in the East where temperatures will remain mild/become increasingly below average for most areas, while ridging builds across the West and into the northern Plains, bringing increasing heat/above average temperatures with time. Record high temperatures will be threatened in and near northern California on Friday and from California northward through portions of Nevada, Oregon, Idaho, and western Montana on Saturday. The anticipated heat in the Southwest on Friday and Saturday has led to the issuance of Extreme Heat Warnings for the dangerous heat for portions of southernmost Nevada, southeast California, and northwestern most Arizona. Drinking plenty of water, wearing light colored clothing, and staying in air conditioned areas is advised as temperatures soar as high as the mid 110s Fahrenheit in lower desert locations like Death Valley, California. Otherwise, waves of low pressure will move along a front, expected to push southward through through Texas into northern Mexico and eastward from the Southern Plains through the Mid-South, Southeast, and Mid-Atlantic States as an increasingly dominant and very strong cyclone for late May strengthens while moving from the Mid-Atlantic States through New England Friday and Saturday. The excessive rainfall/flash flooding risk is highest across the Southern Plains and Southeast Thursday evening/night, from Kentucky across West Virginia and Maryland on Friday, and across northern New England Saturday. The severe weather risk is expected to be highest in and near northwest Texas Thursday evening, the Southeast Thursday evening and Friday, and the Mid-Atlantic States on Saturday, with a generally decreasing severe weather risk by the day. Roth Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php