Alert archive / Oregon / Frost Advisories in 2021
Frost Advisory 1, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Feb 23, 2021, 2:37 PM PST for Coos County, Curry County, Douglas County, Oregon. It took effect at Feb 24, 2021, 4:00 AM PST. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Feb 23, 2021, 2:37 PM PST (22:37 UTC)
- In effect from
- Feb 24, 2021, 4:00 AM PST
- Expired
- Feb 24, 2021, 9:00 AM PST
- In force
- 5 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 22:43 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, 10.6 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
- 801 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
848 WWUS76 KMFR 232237 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 237 PM PST Tue Feb 23 2021 ORZ021-022-241700- /O.NEW.KMFR.FR.Y.0001.210224T1200Z-210224T1700Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, and Bandon 237 PM PST Tue Feb 23 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 9 AM PST WEDNESDAY... * WHAT...Temperatures as low as 29 degrees will result in frost formation. * WHERE...South Central Oregon Coast and Curry County Coast to include Coos Bay, North Bend, Reedsport, Bandon, and sheltered areas near the Curry County coast. * WHEN...From 4 AM to 9 AM PST Wednesday. * 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. && $$ Visit us at https://www.weather.gov/Medford
1 follow-up statement
797 WWUS76 KMFR 241651 NPWMFR URGENT - WEATHER MESSAGE National Weather Service Medford OR 851 AM PST Wed Feb 24 2021 ORZ021-022-241800- /O.EXP.KMFR.FR.Y.0001.000000T0000Z-210224T1700Z/ South Central Oregon Coast-Curry County Coast- Including the cities of Coos Bay, North Bend, Reedsport, and Bandon 851 AM PST Wed Feb 24 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PST THIS MORNING... Temperatures are warming above freezing. $$ 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 |
|---|---|---|---|---|
| Feb 23, 2:04 PM PST | Hazardous Seas Watch | MFR | 24 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.