The white rectangle denotes the area where the HREF ensemble forecast mean deep layer wind shear was greater than 60 knots AND where mean MUCAPE (Most Unstable CAPE) was forecast to range from 1500 to 2000 J/kg. This was the case early Tuesday morning September 7 (Fig. Severe thunderstorms typically develop in areas where strong vertical wind shear ( related to storm updraft maintenance/persistence) and sufficient buoyancy ( related to the updraft strength/intensity) coincide. In the mid-levels of the atmosphere (Fig.1), a seasonably strong 500 mb trough was deepening over Wisconsin that was accompanied by winds of 70-75 knots and temperatures of -14 to -18 degrees C. The previous latest date for hail of 4 inches or greater was August 14, 2000. The 4.5 inch diameter hailstone north of Appleton on Septemwould be the largest hail stone to fall so late in the season (since 1950)! 4.5 inch diameter - Oakdale (Monroe County) - June 1, 2000ĥ NNE Appleton (Outagamie County) - September 7, 2021 5.5 inch diameter - Port Edwards (Wood County) - June 7, 2007ģ. 5.7 inch diameter - Wausau (Marathon County) - May 22, 1921Ģ. Here is a list of some of the largest hail stones ever recorded in Wisconsin:ġ. Severe hail ranging from 1 to 4+ inches in diameter damaged some vehicles and roofs of homes from New London and Hortonville, east across the I-41 corridor near Appleton, to southern Brown County ( see map below for location of hail and wind reports). The largest measured hail stone reported was at least 4.5 inches in diameter (preliminary) that fell about 5 miles NNE of Appleton! This was the third largest hailstone ever recorded in Wisconsin (see below)! A second and more intense squall line (and a few supercells) developed rapidly, shortly after the first, producing swaths of large hail across east-central Wisconsin and the I-41 corridor between about 8 am and 11 am CDT. These storms knocked trees and powerlines down across the northern portion of Door County between 6:00 and 6:30 am CDT. The first squall line developed shortly after midnight on September 7 and impacted areas north of Green Bay and the Fox Valley. Rebecca Loroff is a breaking and trending news reporter for northeastern Wisconsin.SeptemAn Early Morning Late Season Large Hail Event in Northeast Wisconsinĭuring the early to mid-morning hours of September 7, 2021, two separate squall lines developed over parts of northcentral and northeast Wisconsin. The storms impacted the morning rush hour as they raced east at speeds of 50-60 mph. Starting Wednesday, high temperatures are forecast to be about 80 Wednesday, then in the upper 60s to low 70s into the weekend. That low-pressure system will bring "drier, cooler air" to the region, Kallas said. The storms are not expected to be severe in Appleton and Green Bay. A low-pressure system is moving in, bringing some humidity first, the NWS said, and a slight chance of thunderstorms Tuesday night starting from 9 to 10 p.m. The rest of the week, however, is forecast to bring some relief. In addition, the humidity, which came in yesterday, will keep the overall temperatures down today and Wednesday, Kallas said. However, the heat and humidity won't be as "atrocious" as it was 10 days ago, according to Tasos Kallas, a meteorologist with the National Weather Service in Green Bay. On top of that, increasing humidity could drive the heat index up from 90 to 100. Near-record heat is expected again today, with high temperatures possible from 88 to 94 degrees. On Labor Day, Appleton reached a high of 93 and Green Bay, 91, the NWS said. Many Appleton and Green Bay residents will start their school year sweltering.Ī heat dome caused these two cities to break high temperature records on Labor Day - and the heat's unlikely to let up Tuesday, according to the National Weather Service.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |