Alert archive / Oregon / Freeze Warnings in 2011
Freeze Warning 17, NWS Medford, OR
NWS Medford, OR issued this freeze warning at Sep 15, 2011, 2:41 PM PDT for Klamath County, Lake County, Oregon. It took effect at Sep 16, 2011, 2:00 AM PDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 15, 2011, 2:41 PM PDT (21:41 UTC)
- In effect from
- Sep 16, 2011, 2:00 AM PDT
- Expired
- Sep 16, 2011, 8:00 AM PDT
- In force
- 6 hr
- Issued by
- NWS Medford, OR
Counties Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 158 km from the middle of the area, began a volume at 21:43 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
Salem/Mcnary, OR (KSLE), launched 12:00Z, 9.7 hours before the alert went out and 290 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
- 1078 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this freeze warning 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 freeze warning went out at Sep 15, 11:56 AM PDT, 2 hours 45 minutes earlier.
Area forecast discussion, Sep 15, 11:56 AM PDT, 2 hours 45 minutes before
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Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 2:18 AM PDT | Freeze Watch | MFR | Klamath, Lake | 12 hr |
| Sep 15, 3:05 AM PDT | Small Craft Advisory for Winds | MFR | 35 hr | |
| Sep 15, 3:05 AM PDT | Small Craft Advisory for Hazardous Seas | MFR | 35 hr | |
| Sep 15, 2:41 PM PDT | Freeze Watch | MFR | Klamath, Lake | 19 hr |
Nearby
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.