National Weather Service United States Department of Commerce

Heavy Rainfall and Severe Thunderstorm Threats; Heat Risk Expands; Monitoring the Tropics

Flash flooding risks continue for portions of the Four Corners and Great Basin through today. Severe thunderstorms are outlooked from the eastern Great Lakes, southern New England into the mid-Atlantic through Tuesday. Heat risk increases and expands across the center of the nation and across the Ohio Valley and mid-Atlantic this week. Continue to closely monitor tropical development in the Gulf. Read More >

Hot and humid weather will continue through Wednesday evening with temperatures in the upper 80s to the mid 90s and heat indices from the mid 90s to as high as 105 degrees. Low temperatures in the low to mid 70s will further add to heat stress. A Heat Advisory is in effect along and south of Interstate 80 until Thursday evening.
Hot and humid weather will continue through midweek, with peak heat indices reaching near 95 to 100 degrees each afternoon from Monday to Wednesday. Additionally, little relief may be possible overnight due to overnight lows in the low to mid 70s, further adding to the heat stress.
Along and north of Highway 30, occasional chances (10-30%) for showers and storms will continue through midweek. Storm coverage will likely remain low, with much of the area seeing little to no rainfall. Any areas that do see storms can expect lightning, isolated gusty winds, and small hail.
Hot weather is expected through much of this week. Peak heat indices in the mid 90s to lower 100s will lead to an increased risk for heat related illnesses for those working or recreating outside.