Alert archive / Oregon / Winter Weather Advisories in 2021
Winter Weather Advisory 33, NWS Medford, OR
NWS Medford, OR issued this winter weather advisory at Dec 14, 2021, 2:12 PM PST for 7 counties in Oregon; Modoc County, Siskiyou County, California. It took effect at Dec 15, 2021, 4:00 AM PST. It was in force for 29 hr.
The area
The counties it named.
The facts
- Issued
- Dec 14, 2021, 2:12 PM PST (22:12 UTC)
- In effect from
- Dec 15, 2021, 4:00 AM PST
- Expired
- Dec 16, 2021, 9:00 AM PST
- In force
- 29 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Siskiyou County, CA, Coos County, OR, Curry County, OR, Douglas County, OR, Jackson County, OR, Josephine County, OR, Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 47 km from the middle of the area, began a volume at 22:15 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, 10.2 hours before the alert went out and 489 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
- 797 m above ground
- 0-6 km bulk shear
- 96 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- -106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Medford, OR wrote its last area forecast discussion before this winter weather advisory went out at Dec 14, 10:30 AM PST, 3 hours 42 minutes earlier.
Area forecast discussion, Dec 14, 10:30 AM PST, 3 hours 42 minutes before
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</html>The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 13, 9:13 PM PST | Storm Watch | MFR | 18 hr | |
| Dec 14, 2:12 PM PST | Winter Storm Warning | MFR | Jackson, Josephine, Klamath | 36 hr |
| Dec 14, 2:16 PM PST | High Wind Warning | MFR | Coos, Curry, Douglas, Klamath, Lake | 29 hr |
| Dec 14, 2:16 PM PST | Wind Advisory | MFR | Jackson, Klamath, Lake | 29 hr |
| Dec 14, 3:27 PM PST | Hazardous Seas Warning | MFR | 37 hr | |
| Dec 14, 3:27 PM PST | Storm Warning | MFR | 22 hr | |
| Dec 14, 2:42 AM PST | Winter Storm Watch | MFR | Siskiyou | 12 hr |
Nearby
Winter Weather Advisories in Oregon, 2021Winter Weather Advisories in California, 2021Every winter weather 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.