Alert archive / Oregon / Frost Advisories in 2017
Frost Advisory 6, NWS Medford, OR
NWS Medford, OR issued this frost advisory at May 16, 2017, 9:28 PM PDT for Curry County, Jackson County, Josephine County, Oregon; Siskiyou County, California. It took effect at May 17, 2017, 1:00 AM PDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 16, 2017, 9:28 PM PDT (04:28 UTC)
- In effect from
- May 17, 2017, 1:00 AM PDT
- Expired
- May 17, 2017, 8:00 AM PDT
- In force
- 7 hr
- Issued by
- NWS Medford, OR
Counties Siskiyou County, CA, Curry County, OR, Jackson County, OR, Josephine County, OR
The radar
The Medford radar (KMAX), 47 km from the middle of the area, began a volume at 04:26 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, 4.5 hours before the alert went out and 42 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
- 80 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1542 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 182 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 |
|---|---|---|---|---|
| May 17, 2:41 PM PDT | Small Craft Advisory | MFR | 8 days |
Nearby
Frost Advisories in Oregon, 2017Frost Advisories in California, 2017Every frost advisory in 2017
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.