The title says it all. Saturday is the warmest day of the season so far. Highs will reach primarily into the 60s with plenty of sunshine and light south winds. Lows will only fall into the 40s and skies will remain relatively clear.The last time we had a high over 60 degrees was October 25, 2012 with 63, well above average at the time.
For reference, the normal high and low for April 27 are 54 and 33 degrees respectively. So far in April, 25 of those 27 days had temperatures below normal. April also picked up 27.6" of snow, about double of the normal 13.7" of snow we normally get in April. For the whole season, there is an official 210.2" of snow.
All the warmth, which will be sticking around for a few days, will cause rapid snowmelt, much like March of 2012. That means flooding in rivers across the U.P. The greatest danger is in the northwest .
Sunday will be warmer with highs in the upper 60s to low 70s. It will be cooler near the great lakes, especially east with the south wind off of Lake Michigan. The day should be mostly sunny, but clouds will move in from the west later with the next system.
Sunday night will be mild with more lows in the 40s. Rain will cross the U.P. along a weak cold front.
Monday will see more widespread rain and cooler temps, but they should still be in the 50s. It will warm up again on Tuesday, then cool down again on Wednesday. By Thursday, it may be cool enough for some snow mixed with rain.
In other areas of interest, this weekend is the two year anniversary of the largest tornado outbreak in recorded history, the Super Outbreak of 2011 . April 27 was the worst, but over four days 358 tornadoes touched down across the south. Fifteen of them were rated EF4 or EF5 which alone describes the severity of the outbreak. A tornado of EF4 or greater strength is seen on average of only once every other year. This one storm spawned 15 of them. There were 324 deaths attributed to the tornadoes and $11 billion in damages. I remember sitting in Valpo's Weather Center with all of my professors and fellow meteorology friends watching the coverage as more and more homes were destroyed. It's a sad day in weather history.
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