Alert archive / California / Flash Flood Watches in 2019

Flash Flood Watch 13, NWS Los Angeles, CA

December 3, 2019Los Angeles County, California

NWS Los Angeles, CA issued this flash flood watch at Dec 3, 2019, 10:46 PM PST for Los Angeles County, California. It took effect at Dec 4, 2019, 4:00 AM PST. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Dec 3, 2019, 10:46 PM PST (06:46 UTC)
In effect from: Dec 4, 2019, 4:00 AM PST
Expired: Dec 4, 2019, 11:54 AM PST
In force: 8 hr
Issued by: NWS Los Angeles, CA
Flood severity: None

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 06:47 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 flash flood watch 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 flash flood watch went out at Dec 3, 9:34 PM PST, 1 hour 12 minutes earlier.

Area forecast discussion, Dec 3, 9:34 PM PST, 1 hour 12 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 3, 6:47 PM PST	Wind Advisory	LOX		15 hr
Dec 4, 5:26 AM PST	Areal Flood Advisory	LOX	San Luis Obispo	64 min
Dec 4, 6:13 AM PST	Areal Flood Advisory	LOX	Santa Barbara	2 hr
Dec 4, 7:09 AM PST	Areal Flood Advisory	LOX	Ventura	3 hr
Dec 4, 8:24 AM PST	Areal Flood Advisory	LOX	Santa Barbara	66 min
Dec 4, 9:10 AM PST	Areal Flood Advisory	LOX	Los Angeles	3 hr

Nearby

Flash Flood Watches in California, 2019 Every flash flood watch in 2019

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.