Alert archive / Michigan / Frost Advisories in 2021
Frost Advisory 10, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this frost advisory at Oct 23, 2021, 1:17 PM EDT for 11 counties in Michigan. It took effect at Oct 24, 2021, 1:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 23, 2021, 1:17 PM EDT (17:17 UTC)
- In effect from
- Oct 24, 2021, 1:00 AM EDT
- Expired
- Oct 24, 2021, 9:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Grand Rapids, MI
Counties Barry County, MI, Calhoun County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Montcalm County, MI
The radar
The Grand Rapids radar (KGRR), 52 km from the middle of the area, began a volume at 17:21 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Detroit, MI (KDTX), launched 12:00Z, 5.3 hours before the alert went out and 124 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 679 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
791 WWUS73 KGRR 231717 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 117 PM EDT Sat Oct 23 2021 MIZ051-052-057>059-065>067-072>074-240130- /O.NEW.KGRR.FR.Y.0010.211024T0500Z-211024T1300Z/ Montcalm-Gratiot-Kent-Ionia-Clinton-Barry-Eaton-Ingham-Kalamazoo- Calhoun-Jackson- Including the cities of Greenville, Alma, Grand Rapids, Ionia, St. Johns, Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 117 PM EDT Sat Oct 23 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central, south central and southwest Michigan. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Temperatures near freezing could harm plants and other sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
4 follow-up statements
169 WWUS73 KGRR 231937 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 337 PM EDT Sat Oct 23 2021 MIZ051-052-057>059-065>067-072>074-240345- /O.CON.KGRR.FR.Y.0010.211024T0500Z-211024T1300Z/ Montcalm-Gratiot-Kent-Ionia-Clinton-Barry-Eaton-Ingham-Kalamazoo- Calhoun-Jackson- Including the cities of Greenville, Alma, Grand Rapids, Ionia, St. Johns, Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 337 PM EDT Sat Oct 23 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central, south central and southwest Michigan. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Temperatures near freezing could harm plants and other sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
654 WWUS73 KGRR 240040 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 840 PM EDT Sat Oct 23 2021 MIZ051-052-057>059-065>067-072>074-240845- /O.CON.KGRR.FR.Y.0010.211024T0500Z-211024T1300Z/ Montcalm-Gratiot-Kent-Ionia-Clinton-Barry-Eaton-Ingham-Kalamazoo- Calhoun-Jackson- Including the cities of Greenville, Alma, Grand Rapids, Ionia, St. Johns, Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 840 PM EDT Sat Oct 23 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, south central and southwest Michigan. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Temperatures near freezing could harm plants and other sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
176 WWUS73 KGRR 240728 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 328 AM EDT Sun Oct 24 2021 MIZ051-052-057>059-065>067-072>074-241300- /O.CON.KGRR.FR.Y.0010.000000T0000Z-211024T1300Z/ Montcalm-Gratiot-Kent-Ionia-Clinton-Barry-Eaton-Ingham-Kalamazoo- Calhoun-Jackson- Including the cities of Greenville, Alma, Grand Rapids, Ionia, St. Johns, Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 328 AM EDT Sun Oct 24 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, south central and southwest Michigan. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Temperatures near freezing could harm plants and other sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
786 WWUS73 KGRR 241302 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 902 AM EDT Sun Oct 24 2021 MIZ051-052-057>059-065>067-072>074-241415- /O.EXP.KGRR.FR.Y.0010.000000T0000Z-211024T1300Z/ Montcalm-Gratiot-Kent-Ionia-Clinton-Barry-Eaton-Ingham-Kalamazoo- Calhoun-Jackson- Including the cities of Greenville, Alma, Grand Rapids, Ionia, St. Johns, Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 902 AM EDT Sun Oct 24 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures around freezing will quickly warm up over the next hour as the fog burns off and morning sunshine takes over. Clouds and rain tonight will keep temperatures much warmer, and no additional frost is expected. $$ For more information from the National Weather Service visit https://weather.gov/grr
The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 23, 1:14 PM EDT | Gale Warning | GRR | 55 hr |
Nearby
Frost Advisories in Michigan, 2021Every frost advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.