Alert archive / Michigan / Freeze Warnings in 2021
Freeze Warning 6, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this freeze warning at May 8, 2021, 3:47 PM EDT for 4 counties in Michigan. It took effect at May 9, 2021, 1:00 AM EDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 8, 2021, 3:47 PM EDT (19:47 UTC)
- In effect from
- May 9, 2021, 1:00 AM EDT
- Expired
- May 9, 2021, 9:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Grand Rapids, MI
Counties Clare County, MI, Lake County, MI, Mason County, MI, Osceola County, MI
The radar
The Grand Rapids radar (KGRR), 121 km from the middle of the area, began a volume at 19:53 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, 7.8 hours before the alert went out and 207 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
- 1416 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
539 WWUS73 KGRR 081947 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 347 PM EDT Sat May 8 2021 MIZ037>040-090400- /O.NEW.KGRR.FZ.W.0006.210509T0500Z-210509T1300Z/ Mason-Lake-Osceola-Clare- Including the cities of Ludington, Baldwin, Reed City, and Clare 347 PM EDT Sat May 8 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures as low as around 30 expected. * WHERE...Mason, Lake, Osceola and Clare counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Clouds will spread across southern portions of the state, but bases should be high and thin enough for temperatures to fall below freezing after midnight. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ043>046-090400- /O.NEW.KGRR.FR.Y.0003.210509T0500Z-210509T1300Z/ Oceana-Newaygo-Mecosta-Isabella- Including the cities of Hart, Fremont, Big Rapids, and Mount Pleasant 347 PM EDT Sat May 8 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Oceana, Newaygo, Mecosta and Isabella counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Readings will fall into the lower to middle 30s despite some cloud cover overhead. Frost is expected especially in low lying areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
3 follow-up statements
171 WWUS73 KGRR 090149 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 949 PM EDT Sat May 8 2021 MIZ037>040-091000- /O.CON.KGRR.FZ.W.0006.210509T0500Z-210509T1300Z/ Mason-Lake-Osceola-Clare- Including the cities of Ludington, Baldwin, Reed City, and Clare 949 PM EDT Sat May 8 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Sub-freezing temperatures. * WHERE...Osceola, Lake, Mason and Clare counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Freezing temperatures will kill unprotected sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ043>046-091000- /O.CON.KGRR.FR.Y.0003.210509T0500Z-210509T1300Z/ Oceana-Newaygo-Mecosta-Isabella- Including the cities of Hart, Fremont, Big Rapids, and Mount Pleasant 949 PM EDT Sat May 8 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT SUNDAY... * WHAT...Temperatures in the lower to mid 30s. * WHERE...Oceana, Isabella, Newaygo and Mecosta counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Cold temperatures could kill or damage unprotected tender vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
903 WWUS73 KGRR 090711 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 311 AM EDT Sun May 9 2021 MIZ037>040-091300- /O.CON.KGRR.FZ.W.0006.000000T0000Z-210509T1300Z/ Mason-Lake-Osceola-Clare- Including the cities of Ludington, Baldwin, Reed City, and Clare 311 AM EDT Sun May 9 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Sub-freezing temperatures. * WHERE...Osceola, Lake, Mason and Clare counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ MIZ043>046-091300- /O.CON.KGRR.FR.Y.0003.000000T0000Z-210509T1300Z/ Oceana-Newaygo-Mecosta-Isabella- Including the cities of Hart, Fremont, Big Rapids, and Mount Pleasant 311 AM EDT Sun May 9 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * WHAT...Temperatures in the lower to mid 30s. * WHERE...Oceana, Isabella, Newaygo and Mecosta counties. * WHEN...From 1 AM to 9 AM EDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/grr
677 WWUS73 KGRR 091314 NPWGRR URGENT - WEATHER MESSAGE National Weather Service Grand Rapids MI 914 AM EDT Sun May 9 2021 MIZ037>040-091415- /O.EXP.KGRR.FZ.W.0006.000000T0000Z-210509T1300Z/ Mason-Lake-Osceola-Clare- Including the cities of Ludington, Baldwin, Reed City, and Clare 914 AM EDT Sun May 9 2021 ...FREEZE WARNING HAS EXPIRED... Temperatures have risen above freezing in all areas and the Freeze Warning was allowed to expire at 900AM. $$ MIZ043>046-091415- /O.EXP.KGRR.FR.Y.0003.000000T0000Z-210509T1300Z/ Oceana-Newaygo-Mecosta-Isabella- Including the cities of Hart, Fremont, Big Rapids, and Mount Pleasant 914 AM EDT Sun May 9 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have risen this morning and frost is no longer a threat. The Frost Advisory was allowed to expire at 900AM. $$ 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 8, 3:47 PM EDT | Frost Advisory | GRR | Isabella, Mecosta, Newaygo, Oceana | 17 hr |
Nearby
Freeze Warnings in Michigan, 2021Every freeze warning 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.