Alert archive / Oregon / Frost Advisories in 2021
Frost Advisory 5, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Mar 28, 2021, 10:30 PM PDT for Coos County, Curry County, Douglas County, Oregon. It took effect at Mar 30, 2021, 3:00 AM PDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Mar 28, 2021, 10:30 PM PDT (05:30 UTC)
- In effect from
- Mar 30, 2021, 3:00 AM PDT
- Expired
- Mar 30, 2021, 9:00 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 05:36 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 00:00Z, 5.5 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3006 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 186 m²/s²
- 0-3 km storm-relative helicity
- 322 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
578 WWUS76 KMFR 290530 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 1030 PM PDT Sun Mar 28 2021 ORZ031-291000- /O.CON.KMFR.HW.W.0008.000000T0000Z-210329T1000Z/ /O.CON.KMFR.WI.Y.0017.000000T0000Z-210329T1000Z/ Central and Eastern Lake County- 1030 PM PDT Sun Mar 28 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 3 AM PDT MONDAY... ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT MONDAY... * WHAT...For the High Wind Warning, west winds 35 to 50 mph with gusts up to 65 mph. For the Wind Advisory, west winds 30 to 40 mph with gusts up to 55 mph. Low visibility is possible due to blowing dust. * WHERE...The Warning is for the Summer Lake and Hart Mountain areas. The Advisory covers most of the rest of Central and Eastern Lake County. * WHEN...Until 3 AM PDT Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ ORZ021-022-291430- /O.NEW.KMFR.FR.Y.0005.210330T1000Z-210330T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, and Bandon 1030 PM PDT Sun Mar 28 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Low temperatures from 33 to 36 degrees will result in frost formation. * WHERE...South Central Oregon Coast and Curry County Coast. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...This Advisory ranges from the coast to one to two miles inland from the coast. Temperatures will be quite cold farther inland, but the impact will not be as great as the growing season has not begun there yet. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ CAZ085-ORZ030-291000- /O.CON.KMFR.WI.Y.0017.000000T0000Z-210329T1000Z/ Modoc County- Northern and Eastern Klamath County and Western Lake County- 1030 PM PDT Sun Mar 28 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 3 AM PDT MONDAY... * WHAT...West winds 35 to 40 mph with gusts up to 55 mph expected. Low visibility is possible due to blowing dust. * WHERE...Western Lake County and far eastern Klamath County in Oregon, and the Warner Mountains in Modoc County in California, including the communities of Paisley, Silver Lake, and Fort Rock, and Highways 31, 140, and 299. * WHEN...Until 3 AM PDT Monday. * IMPACTS...Gusty winds could blow around unsecured objects, and could make driving difficult, especially for high profile vehicles. Blowing dust will impact visibility downwind of dry lakebeds. Tree limbs could be blown down and power outages are possible. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ Visit us at https://www.weather.gov/Medford
3 follow-up statements
996 WWUS76 KMFR 291013 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 313 AM PDT Mon Mar 29 2021 ORZ031-291115- /O.EXP.KMFR.HW.W.0008.000000T0000Z-210329T1000Z/ /O.EXP.KMFR.WI.Y.0017.000000T0000Z-210329T1000Z/ Central and Eastern Lake County- 313 AM PDT Mon Mar 29 2021 ...HIGH WIND WARNING HAS EXPIRED... ...WIND ADVISORY HAS EXPIRED... The High Wind Warning and Wind Advisory have expired. Peak gusts reached 55 mph at Rock Creek and 65 mph at Summer Lake. $$ CAZ085-ORZ030-291115- /O.EXP.KMFR.WI.Y.0017.000000T0000Z-210329T1000Z/ Modoc County- Northern and Eastern Klamath County and Western Lake County- 313 AM PDT Mon Mar 29 2021 ...WIND ADVISORY HAS EXPIRED... The Wind Advisory has expired. Peak gusts of 35 to 40 mph were common across the area with stronger gusts likely along highway 31 and over the mountains. $$ ORZ021-022-292300- /O.CON.KMFR.FR.Y.0005.210330T1000Z-210330T1600Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, and Bandon 313 AM PDT Mon Mar 29 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Low temperatures from 33 to 36 degrees will result in frost formation. * WHERE...South Central Oregon Coast and Curry County Coast. * WHEN...From 3 AM to 9 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...This Advisory ranges from the coast to one to two miles inland from the coast. Temperatures will be quite cold farther inland, but the impact will not be as great as the growing season has not begun there yet. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ Visit us at https://www.weather.gov/Medford
908 WWUS76 KMFR 292029 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 129 PM PDT Mon Mar 29 2021 ORZ021-301600- /O.NEW.KMFR.FZ.W.0002.210330T1000Z-210330T1600Z/ /O.CON.KMFR.FR.Y.0005.210330T1000Z-210330T1600Z/ South Central Oregon Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, Port Orford, and Coquille 129 PM PDT Mon Mar 29 2021 ...FREEZE WARNING IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Temperatures as low as 27 degrees are expected for inland areas, with temperatures of 32 to 35 degrees expected along the coast. * WHERE...Freezing conditions are expected for most areas inland from the immediate coast, including the cities of Coos Bay, North Bend, Coquille, Myrtle Point, and Powers. Frost is likely for more near shore locations, including Bandon, Charleston, and Lakeside. * WHEN...From 3 AM late tonight to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation, and could possibly damage unprotected outdoor plumbing. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ORZ024-026-301600- /O.NEW.KMFR.FZ.W.0002.210330T0800Z-210330T1600Z/ Eastern Curry County and Josephine County-Jackson County- Including the cities of Grants Pass, Cave Junction, Medford, and Ashland 129 PM PDT Mon Mar 29 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 25 degrees expected. * WHERE...Valleys of Josephine and Jackson Counties, including Medford, Grants Pass, Ashland, Talent, Phoenix, Eagle Point, Williams, Provolt, Merlin, and Shady Cove. * WHEN...From 1 AM late tonight to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, new fruit buds, and other sensitive vegetation, and could possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...This is a deep cold air mass, thus temperatures above the shallow inversion are also expected to be well below freezing. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ ORZ022-301600- /O.CON.KMFR.FR.Y.0005.210330T1000Z-210330T1600Z/ Curry County Coast- Including the city of Gold Beach 129 PM PDT Mon Mar 29 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 9 AM PDT TUESDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Curry County Coast, including Gold Beach, Port Orford, and areas surrounding Brookings. * WHEN...From 3 AM late tonight to 9 AM PDT Tuesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered or unprotected. * View the hazard area in detail at https://www.wrh.noaa.gov/map/?wfo=mfr PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ BPN Visit us at https://www.weather.gov/Medford
846 WWUS76 KMFR 301547 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 847 AM PDT Tue Mar 30 2021 ORZ021-301700- /O.EXP.KMFR.FZ.W.0002.000000T0000Z-210330T1600Z/ /O.EXP.KMFR.FR.Y.0005.000000T0000Z-210330T1600Z/ South Central Oregon Coast- Including the cities of Coos Bay, North Bend, Reedsport, Bandon, Port Orford, and Coquille 847 AM PDT Tue Mar 30 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... $$ ORZ024-026-301700- /O.EXP.KMFR.FZ.W.0002.000000T0000Z-210330T1600Z/ Eastern Curry County and Josephine County-Jackson County- Including the cities of Grants Pass, Cave Junction, Medford, and Ashland 847 AM PDT Tue Mar 30 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... $$ ORZ022-301700- /O.EXP.KMFR.FR.Y.0005.000000T0000Z-210330T1600Z/ Curry County Coast- Including the city of Gold Beach 847 AM PDT Tue Mar 30 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... $$ 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 28, 8:20 PM PDT | High Wind Warning | MFR | Lake | 7 hr |
| Mar 29, 2:59 AM PDT | Hazardous Seas Warning | MFR | 11 hr | |
| Mar 29, 2:59 AM PDT | Hazardous Seas Warning | MFR | 56 hr | |
| Mar 29, 1:29 PM PDT | Freeze Warning | MFR | Coos, Curry, Douglas, Jackson, Josephine | 20 hr |
| Mar 29, 2:43 PM PDT | Small Craft Advisory | MFR | 47 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.