Possible record-breaking heat today in Appleton, Oshkosh, Green Bay before thunderstorms move in on Friday
GREEN BAY - High temperatures in the mid-80s and low 90s could break records for heat today, but an incoming weak cold front could cause scattered thunderstorms Friday, according to the National Weather Service.
The records for today's high temperatures are 91 degrees in Appleton, 87 in Green Bay and 86 in Oshkosh, all of which were set in 1991, according to meteorologist Rebecca Hykin from the National Weather Service in Green Bay. Green Bay and Oshkosh stand the highest chance of breaking records today.
Today's forecast calls for highs of 92 in Oshkosh, 91 in Appleton, 90 in Green Bay, and 88 in Fond do Lac. It will be cooler near Lake Michigan, with highs of 77 in Sturgeon Bay, 70 in Kewaunee, 69 in Manitowoc and 67 in Sheboygan.
Hykin also said that because the dew points are expected to be in the upper 60s, much of northern Wisconsin can also expect to see heat indexes in the 90s.
Possible severe storms Friday
Friday afternoon's temperatures will be lower, with highs in the 70s and 80s expected, but severe isolated thunderstorms are possible across eastern Wisconsin with large hail and damaging winds, according to the National Weather Service.
The greatest chance for storms starts at 1 p.m. Friday and continues into the evening, moving east by 9 p.m., Hykin said.
The high heat has increased the instability in the atmosphere, and any cold fronts can set up the conditions for a severe thunderstorm, Hykin added. "It's an atmosphere that's pretty ripe for severe weather to occur with that instability. It can just continue and keep happening over and over again since we've been in this pattern."
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Contact Rebecca Loroff at 920-907-7801 or firstname.lastname@example.org.