Alert archive / Oregon / Frost Advisories in 2026
Frost Advisory 8, NWS Medford, OR
NWS Medford, OR issued this frost advisory at Aug 31, 2026, 12:19 PM PDT for Klamath County, Lake County, Oregon; Modoc County, California. It took effect at Sep 2, 2026, 4:00 AM PDT. It was in force for 29 min.
The area
The counties it named.
The facts
- Issued
- Aug 31, 2026, 12:19 PM PDT (19:19 UTC)
- In effect from
- Sep 2, 2026, 4:00 AM PDT
- Expired
- Sep 2, 2026, 4:29 AM PDT
- In force
- 29 min
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 151 km from the middle of the area, began a volume at 19:16 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
Reno, NV (KREV), launched 12:00Z, 7.3 hours before the alert went out and 385 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
- 2574 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 12:22 AM PDT | Gale Watch | MFR | 25 hr |
Nearby
Frost Advisories in Oregon, 2026Frost Advisories in California, 2026Every frost advisory in 2026
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.