Multiple weather threats could bring heavy rain, localized flooding
MADISON, Wis. — Friday has been declared an Alert Day due to the potential of heavy rain and extremely localized flooding in the southern part of the News 3 Now viewing area.
Showers and thunderstorms have already developed over eastern Iowa and parts of Wisconsin early Friday morning, and will continue through the day.
The heaviest rain Friday morning should remain south into northern Illinois.
This could very well be the case Friday evening as well, when the greatest shower and storm coverage will be likely.
Since parts of southern Wisconsin have received 150% to 400% more rain than normal since the beginning of September, this area needs to be monitored closely during upcoming storms.
Even rainfall amounts of as little as one inch may lead to additional flooding concerns.
After a dry and cool day on Saturday, showers and thunderstorms return Saturday night as a warm front lifts toward Wisconsin, and passes through southern Wisconsin Sunday night or Monday morning.
The chances for rain may drop as thunderstorms become more widely scattered as the warm front moves to the north of Madison, but any thunderstorms on Sunday and Monday are capable of producing heavy rainfall. Monday will be quite warm and humid, with high temperatures approaching 80 degrees in some areas. That could also lead to a chance of strong to severe thunderstorms as well as the heavy rainfall threat.
As the center of the storm system moves through Wisconsin on Tuesday and Wednesday, showers and thunderstorms are likely on Tuesday and Wednesday. The latest long-range computer models continue to show the potential for general 2 to 4 inches of rainfall over much of southern Wisconsin over the next seven days, with locally higher amounts possible in areas that have heavier thunderstorms. This could lead to additional flooding in flood prone areas and near rivers and streams.
Alert Days remain in the forecast for Friday of this week, and for Monday, Tuesday and Wednesday of next week, when the heavy rain and flooding threats will be the highest.
There could also be a threat of isolated severe thunderstorms on Friday afternoon and on Monday.
Dry and cooler weather should return later Thursday into Friday of next week. After a cold front brings some showers and thunderstorms on Saturday of next weekend, a more prolonged period of dry weather with seasonable fall temperatures could settle over Wisconsin for much of the first full week of October.
Stay tuned to News 3 Now newscasts, Channel3000.com on the internet, and the Channel 3000 First Alert Weather and Traffic App for further weather updates.
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