* WHAT. Very cold wind chills as low as 20 below. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST this morning. * IMPACTS. The cold wind chills as low as 15 below zero could result in hypothermia or frostbite if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 30 below. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST this morning. * IMPACTS. The dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 20 below. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 25 below. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 20 below zero. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 25 below zero. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 25 below zero could cause frostbite on exposed skin in 30 minutes or less. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 20 to 25 below zero. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 20 to 25 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 25 to 30 below zero. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 25 to 30 below zero could cause frostbite on exposed skin in 30 minutes or less. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 20 to 25 below. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST Saturday. * IMPACTS. These dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 25 to 30 below. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST Saturday. * IMPACTS. These dangerously cold wind chills could cause frostbite on exposed skin in 30 minutes or less. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 25 below. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 32 below. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. Until 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 10 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Very cold wind chills as low as 25 below expected. * WHERE. Calhoun, Eaton, Ingham, Jackson, Allegan, Barry, Kalamazoo, and Van Buren Counties. * WHEN. From 8 PM this evening to 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 25 below zero possible could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. * ADDITIONAL DETAILS. Overnight Lows Saturday morning will range from -10 to -15 and in some locations as low as -20F are possible in some areas.

* WHAT. Dangerously cold wind chills as low as 30 below expected. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From 8 PM this evening to 11 AM EST Saturday. * IMPACTS. The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 10 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes. * ADDITIONAL DETAILS. Extreme cold wind chills are expected Friday morning with Morning low temperatures near or below -20 possible Saturday morning.

* WHAT. Very cold wind chills as low as 20 to 25 below expected Friday morning. Continued significant cold Friday and Friday night. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From 1 AM Friday to 10 AM EST Saturday. * IMPACTS. The dangerously cold wind chills approaching 25 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

* WHAT. Dangerously cold wind chills as low as 25 below possible. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From late Thursday night through Saturday morning. * IMPACTS. The dangerously cold wind chills as low as 25 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

* WHAT. Dangerously cold wind chills as low as 24 below possible. * WHERE. Portions of central, south central, southwest, and west central Michigan. * WHEN. From late Thursday night through Saturday morning. * IMPACTS. The dangerously cold wind chills as low as 25 below zero could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. An extended period of freezing temperatures could cause ruptured water pipes.

ESFGRR Bitterly cold temperatures moving into Michigan over the next few days will increase the risk of ice jams on rivers. While many locations have already frozen over, ongoing ice growth will continue to increase in any open water areas. These temperatures have not been seen for many years in West Michigan, which means that some areas that don't typically experience river ice jams may have issues this year. Ice jams can result in water levels rising much more quickly than usual, which can catch people off guard. Anyone living or working near rivers in West Michigan should prepare now for potential river ice and rising water levels. While temperatures warm up a bit early next week, this overall cold weather pattern will continue through at least next week, which will keep ice locked in place on the rivers. You can always find the latest river level information at water.noaa. gov