Alert archive / Michigan / Frost Advisories in 2021
Frost Advisory 2, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this frost advisory at May 7, 2021, 3:51 PM EDT for 11 counties in Michigan. It took effect at May 8, 2021, 2:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 7, 2021, 3:51 PM EDT (19:51 UTC)
- In effect from
- May 8, 2021, 2:00 AM EDT
- Expired
- May 8, 2021, 9:00 AM EDT
- In force
- 7 hr
- Issued by
- NWS Grand Rapids, MI
Counties Allegan County, MI, Clinton County, MI, Gratiot County, MI, Ingham County, MI, Isabella County, MI, Jackson County, MI, Mason County, MI, Muskegon County, MI, Oceana County, MI, Ottawa County, MI, Van Buren County, MI
The radar
The Grand Rapids radar (KGRR), 17 km from the middle of the area, began a volume at 19:51 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.9 hours before the alert went out and 265 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
- 731 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 100 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
117 WWUS73 KGRR 071951 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 351 PM EDT Fri May 7 2021 MIZ038>040-044-045-051-057-058-065-066-072-073-080400- /O.NEW.KGRR.FZ.W.0005.210508T0600Z-210508T1300Z/ Lake-Osceola-Clare-Newaygo-Mecosta-Montcalm-Kent-Ionia-Barry- Eaton-Kalamazoo-Calhoun- Including the cities of Baldwin, Reed City, Clare, Fremont, Big Rapids, Greenville, Grand Rapids, Ionia, Hastings, Charlotte, Kalamazoo, and Battle Creek 351 PM EDT Fri May 7 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures dropping to 28 to 32 degrees tonight. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...From 2 AM to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Coldest readings will be found across Central Lower Michigan, however all areas in the warning have a chance to fall below the freezing mark. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ037-043-046-050-052-056-059-064-067-071-074-080400- /O.NEW.KGRR.FR.Y.0002.210508T0600Z-210508T1300Z/ Mason-Oceana-Isabella-Muskegon-Gratiot-Ottawa-Clinton-Allegan- Ingham-Van Buren-Jackson- Including the cities of Ludington, Hart, Mount Pleasant, Muskegon, Alma, Grand Haven, Jenison, St. Johns, Holland, Lansing, South Haven, and Jackson 351 PM EDT Fri May 7 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures dropping to between 32 to 36 degrees tonight. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...From 2 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Temperatures will fall into the lower to middle 30s in the advisory area, making frost likely. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
3 follow-up statements
685 WWUS73 KGRR 080219 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 1019 PM EDT Fri May 7 2021 MIZ038>040-044-045-051-057-058-065-066-072-073-081030- /O.CON.KGRR.FZ.W.0005.210508T0600Z-210508T1300Z/ Lake-Osceola-Clare-Newaygo-Mecosta-Montcalm-Kent-Ionia-Barry- Eaton-Kalamazoo-Calhoun- Including the cities of Baldwin, Reed City, Clare, Fremont, Big Rapids, Greenville, Grand Rapids, Ionia, Hastings, Charlotte, Kalamazoo, and Battle Creek 1019 PM EDT Fri May 7 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT SATURDAY... * WHAT...Sub-freezing temperatures of 28 to 32 expected. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...From 2 AM to 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Coldest readings will be found across Central Lower Michigan, however all areas in the warning have a chance to fall below the freezing mark. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ037-043-046-050-052-056-059-064-067-071-074-081030- /O.CON.KGRR.FR.Y.0002.210508T0600Z-210508T1300Z/ Mason-Oceana-Isabella-Muskegon-Gratiot-Ottawa-Clinton-Allegan- Ingham-Van Buren-Jackson- Including the cities of Ludington, Hart, Mount Pleasant, Muskegon, Alma, Grand Haven, Jenison, St. Johns, Holland, Lansing, South Haven, and Jackson 1019 PM EDT Fri May 7 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM EDT SATURDAY... * WHAT...Temperatures dropping to between 32 to 36 degrees will result in frost formation. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...From 2 AM to 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
226 WWUS73 KGRR 080754 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 354 AM EDT Sat May 8 2021 MIZ038>040-044-045-051-057-058-065-066-072-073-081300- /O.CON.KGRR.FZ.W.0005.000000T0000Z-210508T1300Z/ Lake-Osceola-Clare-Newaygo-Mecosta-Montcalm-Kent-Ionia-Barry- Eaton-Kalamazoo-Calhoun- Including the cities of Baldwin, Reed City, Clare, Fremont, Big Rapids, Greenville, Grand Rapids, Ionia, Hastings, Charlotte, Kalamazoo, and Battle Creek 354 AM EDT Sat May 8 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures of 28 to 32 expected. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...Through 9 AM EDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Another round of frost and temperatures near freezing is expected tonight for portions of Central Michigan. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ037-043-046-050-052-056-059-064-067-071-074-081300- /O.CON.KGRR.FR.Y.0002.000000T0000Z-210508T1300Z/ Mason-Oceana-Isabella-Muskegon-Gratiot-Ottawa-Clinton-Allegan- Ingham-Van Buren-Jackson- Including the cities of Ludington, Hart, Mount Pleasant, Muskegon, Alma, Grand Haven, Jenison, St. Johns, Holland, Lansing, South Haven, and Jackson 354 AM EDT Sat May 8 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures between 32 to 36 degrees will result in frost formation. A few locations will fall below freezing. * WHERE...Portions of central, south central, southwest and west central Michigan. * WHEN...Through 9 AM EDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Another round of frost and temperatures near freezing is expected tonight for portions of Central Michigan. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
351 WWUS73 KGRR 081304 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 904 AM EDT Sat May 8 2021 MIZ038>040-044-045-051-057-058-065-066-072-073-081415- /O.EXP.KGRR.FZ.W.0005.000000T0000Z-210508T1300Z/ Lake-Osceola-Clare-Newaygo-Mecosta-Montcalm-Kent-Ionia-Barry- Eaton-Kalamazoo-Calhoun- Including the cities of Baldwin, Reed City, Clare, Fremont, Big Rapids, Greenville, Grand Rapids, Ionia, Hastings, Charlotte, Kalamazoo, and Battle Creek 904 AM EDT Sat May 8 2021 ...FREEZE WARNING HAS EXPIRED... Temperatures are rising and the Freeze Warning was allowed to expire on time at 900am. $$ MIZ037-043-046-050-052-056-059-064-067-071-074-081415- /O.EXP.KGRR.FR.Y.0002.000000T0000Z-210508T1300Z/ Mason-Oceana-Isabella-Muskegon-Gratiot-Ottawa-Clinton-Allegan- Ingham-Van Buren-Jackson- Including the cities of Ludington, Hart, Mount Pleasant, Muskegon, Alma, Grand Haven, Jenison, St. Johns, Holland, Lansing, South Haven, and Jackson 904 AM EDT Sat May 8 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures are rising and the Frost Advisory was allowed to expire on time at 900am. $$ 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 |
|---|---|---|---|---|
| May 6, 9:33 PM EDT | Small Craft Advisory | GRR | 31 hr | |
| May 7, 5:58 AM EDT | Dense Fog Advisory | GRR | Allegan, Barry, Calhoun, Clinton, Eaton, Ingham and 7 more | 3 hr |
| May 7, 3:51 PM EDT | Freeze Warning | GRR | Barry, Calhoun, Clare, Eaton, Ionia, Kalamazoo and 6 more | 17 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.