Alert archive / California / Freeze Warnings in 2018
Freeze Warning 3, NWS Los Angeles, CA
NWS Los Angeles, CA issued this freeze warning at Feb 18, 2018, 3:05 PM PST for Los Angeles County, California. It took effect at Feb 21, 2018, 1:00 AM PST. It was in force for 8 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
- Feb 18, 2018, 3:05 PM PST (23:05 UTC)
- In effect from
- Feb 21, 2018, 1:00 AM PST
- Expired
- Feb 21, 2018, 9:00 AM PST
- In force
- 8 hr
- Issued by
- NWS Los Angeles, CA
County Los Angeles County, CA
The radar
The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 23:06 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
San Diego, CA (KNKX), launched 12:00Z, 11.1 hours before the alert went out and 184 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
- 2131 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -2 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 Los Angeles, CA wrote its last area forecast discussion before this freeze warning went out at Feb 18, 1:57 PM PST, 1 hour 8 minutes earlier.
Area forecast discussion, Feb 18, 1:57 PM PST, 1 hour 8 minutes before
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</html>The office that day
Everything else NWS Los Angeles, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 8:41 PM PST | Gale Watch | LOX | 6 hr | |
| Feb 18, 2:11 AM PST | Gale Warning | LOX | 49 hr | |
| Feb 18, 4:30 AM PST | Freeze Watch | LOX | 11 hr | |
| Feb 18, 4:30 AM PST | Hard Freeze Watch | LOX | Santa Barbara | 11 hr |
| Feb 18, 4:30 AM PST | Wind Advisory | LOX | 41 hr | |
| Feb 18, 1:44 PM PST | High Surf Advisory | LOX | 48 hr | |
| Feb 18, 3:05 PM PST | Freeze Warning | LOX | 42 hr | |
| Feb 18, 3:05 PM PST | Hard Freeze Warning | LOX | Santa Barbara | 42 hr |
| Feb 18, 3:05 PM PST | Hard Freeze Warning | LOX | Santa Barbara | 66 hr |
Nearby
Freeze Warnings in California, 2018Every freeze warning in 2018
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.