Alert archive / Oregon / Frost Advisories in 2021
Frost Advisory 4, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Mar 16, 2021, 1:28 PM PDT for Coos County, Curry County, Douglas County, Oregon. It took effect at Mar 17, 2021, 2:00 AM PDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Mar 16, 2021, 1:28 PM PDT (20:28 UTC)
- In effect from
- Mar 17, 2021, 2:00 AM PDT
- Expired
- Mar 17, 2021, 8:08 AM PDT
- In force
- 6 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 20:30 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, 8.5 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
- 2 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
858 WWUS76 KMFR 162028 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 128 PM PDT Tue Mar 16 2021 ORZ021-022-171200- /O.NEW.KMFR.FR.Y.0004.210317T0900Z-210317T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, and Coquille 128 PM PDT Tue Mar 16 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 degrees will result in frost formation. * WHERE...South Central Oregon Coast and Curry County Coast away from the immediate coastline, including the cities of Coos Bay, North Bend, Powers, Myrtle Point and Bandon. * WHEN...From 2 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could damage or kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Isolated areas of freezing conditions are possible in the typically colder areas. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect sensitive plants from the cold. && $$ Visit us at https://www.weather.gov/Medford
2 follow-up statements
990 WWUS76 KMFR 171022 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 322 AM PDT Wed Mar 17 2021 CAZ081-171830- /O.NEW.KMFR.WI.Y.0016.210318T1200Z-210319T0300Z/ Central Siskiyou County- Including the cities of Weed and Yreka 322 AM PDT Wed Mar 17 2021 ...WIND ADVISORY IN EFFECT FROM 5 AM TO 8 PM PDT THURSDAY... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Central Siskiyou County, from Weed to Yreka and Montague. The strongest winds will be near Weed. * WHEN...From 5 AM to 8 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ ORZ026-171830- /O.NEW.KMFR.WI.Y.0016.210318T1200Z-210319T0300Z/ Jackson County- Including the cities of Medford and Ashland 322 AM PDT Wed Mar 17 2021 ...WIND ADVISORY IN EFFECT FROM 5 AM TO 8 PM PDT THURSDAY... * WHAT...South winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...Jackson County. Including the cities of Ashland, Phoenix, Talent, Medford, and White City. The strongest winds will be near Ashland. * WHEN...From 5 AM to 8 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ085-ORZ030-031-171830- /O.NEW.KMFR.WI.Y.0016.210318T1500Z-210319T0600Z/ Modoc County- Northern and Eastern Klamath County and Western Lake County- Central and Eastern Lake County- Including the cities of Alturas, Likely, Adel, Lakeview, and Valley Falls 322 AM PDT Wed Mar 17 2021 ...WIND ADVISORY IN EFFECT FROM 8 AM TO 11 PM PDT THURSDAY... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...In California, Modoc County, including the cities of Alturas, Likely, Davis Creek and Willow Ranch. In Oregon, Northern and Eastern Klamath County and Western Lake County and Central and Eastern Lake County. Including the cities of Lakeview, Valley Falls, Adel, Paisely, Summer Lake, Silver Lake and Alkali Lake. * WHEN...From 8 AM to 11 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ ORZ021-022-171600- /O.CON.KMFR.FR.Y.0004.000000T0000Z-210317T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, and Coquille 322 AM PDT Wed Mar 17 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...South Central Oregon Coast and Curry County Coast away from the immediate coastline, including the cities of Coos Bay, North Bend, Powers, Myrtle Point and Bandon. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Isolated areas of freezing conditions are possible in the typically colder areas. * 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. && $$ Visit us at https://www.weather.gov/Medford
987 WWUS76 KMFR 171508 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 808 AM PDT Wed Mar 17 2021 ORZ021-022-171615- /O.CAN.KMFR.FR.Y.0004.000000T0000Z-210317T1600Z/ South Central Oregon Coast-Curry County Coast- 808 AM PDT Wed Mar 17 2021 ...FROST ADVISORY IS CANCELLED... Temperatures will continue to warm above critical values this morning. $$ CAZ081-172315- /O.CON.KMFR.WI.Y.0016.210318T1200Z-210319T0300Z/ Central Siskiyou County- Including the cities of Weed and Yreka 808 AM PDT Wed Mar 17 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT THURSDAY... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Central Siskiyou County, from Weed to Yreka and Montague. The strongest winds will be near Weed. * WHEN...From 5 AM to 8 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ ORZ026-172315- /O.CON.KMFR.WI.Y.0016.210318T1200Z-210319T0300Z/ Jackson County- Including the cities of Medford and Ashland 808 AM PDT Wed Mar 17 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 5 AM TO 8 PM PDT THURSDAY... * WHAT...Southeast winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...Jackson County. Including the cities of Ashland, Phoenix, Talent, Medford, and White City. The strongest winds will be near Ashland. * WHEN...From 5 AM to 8 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ085-ORZ030-031-172315- /O.CON.KMFR.WI.Y.0016.210318T1500Z-210319T0600Z/ Modoc County- Northern and Eastern Klamath County and Western Lake County- Central and Eastern Lake County- Including the cities of Alturas, Likely, Adel, Lakeview, and Valley Falls 808 AM PDT Wed Mar 17 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 8 AM TO 11 PM PDT THURSDAY... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...In California, Modoc County, including the cities of Alturas, Likely, Davis Creek and Willow Ranch. In Oregon, northern and eastern Klamath County and western Lake County and central and eastern Lake County. Including the cities of Lakeview, Valley Falls, Adel, Paisely, Summer Lake, Silver Lake and Alkali Lake. * WHEN...From 8 AM to 11 PM PDT Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Visit us at https://www.weather.gov/Medford
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 9:41 PM PDT | Frost Advisory | MFR | Coos, Curry, Douglas | 11 hr |
| Mar 16, 2:19 AM PDT | Gale Watch | MFR | 12 hr | |
| Mar 16, 2:08 PM PDT | Gale Warning | MFR | 61 hr |
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.