Alert archive / California / Frost Advisories in 2011

Frost Advisory 18, NWS Los Angeles, CA

December 23, 2011Los Angeles County, California

NWS Los Angeles, CA issued this frost advisory at Dec 23, 2011, 12:15 PM PST for Los Angeles County, California. It took effect at Dec 24, 2011, 12:00 AM PST. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Dec 23, 2011, 12:15 PM PST (20:15 UTC)
In effect from: Dec 24, 2011, 12:00 AM PST
Expired: Dec 24, 2011, 3:54 AM PST
In force: 4 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 20:18 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.

What forecasters said that day

The local office's own words before this frost advisory 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 frost advisory went out at Dec 22, 3:35 PM PST, 20 hours 40 minutes earlier.

Area forecast discussion, Dec 22, 3:35 PM PST, 20 hours 40 minutes before

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Hazardous weather outlook, Dec 22, 2:50 PM PST, 21 hours 25 minutes before

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The office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 23, 3:49 AM PST	Freeze Warning	LOX		29 hr

Nearby

Frost Advisories in California, 2011 Every frost advisory in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.