National Weather Service offices issued multiple severe thunderstorm watches, tornado warnings and flood advisories across the Plains and Midwest overnight July 3 into July 4. NWS Quad Cities IA IL issued a Severe Thunderstorm Watch at 9:55 PM CDT July 3 valid until 2:00 AM CDT July 4, and SPC products included Mesoscale Discussion 1482 and MCD 1485 highlighting threats of tornadoes, hail up to about 1.25, 1.75 inches and damaging gusts to 65, 90 mph across eastern Iowa, northern Illinois, central and southwest Nebraska and far northeast Colorado. Severe Thunderstorm Watch 450 covered parts of Nebraska with some offices noting the watch remained valid until midnight CDT, while Severe Thunderstorm Watch 451 warned of gusts to 70 mph, hail to 1.5 inches and a few tornadoes for far eastern Iowa into northern Illinois. Local offices updated watch coverage overnight, with LOT canceling watches for several Illinois counties while continuing others through early July 4, PHI canceling a watch for Burlington, Camden, Gloucester and Ocean counties in New Jersey, and UNR and GID issuing expirations for South Dakota and Nebraska/Kansas watches respectively. The Weather Prediction Center issued Mesoscale Precipitation Discussion 581 for heavy rainfall and possible flash flooding, GGW issued a flood advisory for Garfield, Montana, and spot reports included a large tree damaging a house in Madison County, Tennessee and a 58 mph gust at Linden Airport, New Jersey. Watches and warnings triggered county-level cancellations, expirations and continued coverage into the early hours of July 4 as offices adjusted products to observed storm behavior and ongoing threats.
