Alert archive / Oregon / Frost Advisories in 2021
Frost Advisory 2, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Mar 11, 2021, 4:48 AM PST for Coos County, Curry County, Douglas County, Oregon. It took effect at Mar 12, 2021, 1:00 AM PST. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Mar 11, 2021, 4:48 AM PST (12:48 UTC)
- In effect from
- Mar 12, 2021, 1:00 AM PST
- Expired
- Mar 12, 2021, 8:00 AM PST
- In force
- 7 hr
- Issued by
- NWS Medford, OR
Counties Coos County, OR, Curry County, OR, Douglas County, OR
The radar
The Medford radar (KMAX), 135 km from the middle of the area, began a volume at 12:47 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
Medford/Jackson, OR (KMFR), launched 12:00Z, 0.8 hours before the alert went out and 108 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
- 689 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
737 WWUS76 KMFR 111248 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 448 AM PST Thu Mar 11 2021 ORZ021-022-112300- /O.NEW.KMFR.FR.Y.0002.210312T0900Z-210312T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, Port Orford, and Coquille 448 AM PST Thu Mar 11 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 8 AM PST FRIDAY... * WHAT...Temperatures as low as 33 will result in frost formation. Coldest spots may briefly touch freezing early Friday morning. * WHERE...South Central Oregon Coast and Curry County Coast including Reedsport, North Bend, Bandon, Port Orford, Myrtle Point, and Coquille. * WHEN...From 1 AM to 8 AM PST Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Visit us at https://www.weather.gov/Medford
2 follow-up statements
009 WWUS76 KMFR 112200 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 200 PM PST Thu Mar 11 2021 ORZ021-022-121600- /O.CON.KMFR.FR.Y.0002.210312T0900Z-210312T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, Port Orford, and Coquille 200 PM PST Thu Mar 11 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM PST FRIDAY... * WHAT...Temperatures as low as 33 will result in frost formation. Coldest spots may briefly touch freezing early Friday morning. * WHERE...South Central Oregon Coast and Curry County Coast including Reedsport, North Bend, Bandon, and Port Orford. * WHEN...From 1 AM to 8 AM PST Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Visit us at https://www.weather.gov/Medford
364 WWUS76 KMFR 121323 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 523 AM PST Fri Mar 12 2021 ORZ021-121600- /O.NEW.KMFR.FG.Y.0008.210312T1323Z-210312T1600Z/ /O.CON.KMFR.FR.Y.0002.000000T0000Z-210312T1600Z/ South Central Oregon Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, Port Orford, and Coquille 523 AM PST Fri Mar 12 2021 ...DENSE FOG ADVISORY IN EFFECT UNTIL 8 AM PST THIS MORNING... ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... * WHAT...For the Frost Advisory, temperatures in the mid 30s, and locally in the lower 30s, will result in frost formation. For the Dense Fog Advisory, visibility of one quarter a mile or less in dense fog. * WHERE...For the Frost Advisory, portions of the Coos, Douglas and Curry County coast including Reedsport, Charleston, Bandon, Langlois, Sixes, Port Orford and areas just inland of Gold Beach and Brookings. For the Dense Fog Advisory, the Coos coast near North Bend and Coos Bay and areas in and near the Coquille Valley including Coquille, Myrtle Point, and Powers. * WHEN...Until 8 AM PST this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. Hazardous driving conditions due to low visibility. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. If driving, slow down, use your headlights, and leave plenty of distance ahead of you. && $$ ORZ022-121600- /O.CON.KMFR.FR.Y.0002.000000T0000Z-210312T1600Z/ Curry County Coast- 523 AM PST Fri Mar 12 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. Coldest spots may briefly touch freezing early Friday morning. * WHERE...South Central Oregon Coast and Curry County Coast including Reedsport, North Bend, Bandon, and Port Orford. * WHEN...From 1 AM to 8 AM PST Friday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Visit us at https://www.weather.gov/Medford
Nearby
Frost Advisories in Oregon, 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.