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Increasing Clouds Saturday Heat Arrives Sunday

Sun starts the day on Saturday before clouds move in during the afternoon. Upper ridging will set the stage for a several day stretch of 90 degree weather, beginning Sunday and continuing through much of next week. Read More >

Overview

February 27, 2024 will be remembered as an exceedingly warm day followed by rapid changes at night. Deep southerly flow brought massive warm air advection that broke Maximum high temperatures across the lower Michigan. In Grand Rapids, it was over 70 degrees for the first time on record. Surface dew points surged into the 50s. So a warm moist air mass over the region was more like a late April day then a late February one. A large synoptic system moving in from the west brought strong atmospheric lift to the area.

The deep layer shear in Southwest Lower Michigan was well over 40 knots. With strong deep layer shear (that is, changing wind speed and/or direction with respect to height above the ground)and moderate instability (see this page for an explanation of instability), the region was ripe for severe weather. A line of severe thunderstorms entered the area from the south with several supercell thunderstorms (see the bottom of this page for a description of supercells) out ahead of the line.

One long lived supercell with a persistent mesocyclone caused damage along the I-94 corridor which included an EF-1 Tornado near Marshall Michigan. Along with this supercell a line of storms brought upwards of 2.4 inch hail across Lower Michigan to areas south of I-96. This storm system continued eastward and caused an EF-2 tornado in Grand Blanc Michigan. For more information on that storm go to NWS Detroit

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Picture of Marshall Tornado 12:34 AM 28 February 2024
Looking north from Beckley Road
 Photo Credit  Firefighter Deven Cook

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Marshall Tornado: Photo Credit: Don McCracken Marshall Tornado: Photo Credit: Don McCracken 2.4 inch large hail Battle Creek 
Photo Credit: Katie Nickolaou
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