Alert archive / California / Red Flag Warnings in 2019

Red Flag Warning 7, NWS Los Angeles, CA

November 16, 2019Los Angeles County, California

NWS Los Angeles, CA issued this red flag warning at Nov 16, 2019, 9:10 AM PST for Los Angeles County, California. It took effect at Nov 17, 2019, 1:00 AM PST. It was in force for 17 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: Nov 16, 2019, 9:10 AM PST (17:10 UTC)
In effect from: Nov 17, 2019, 1:00 AM PST
Expired: Nov 17, 2019, 6:00 PM PST
In force: 17 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 17:14 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, 5.2 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1535 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this red flag 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 red flag warning went out at Nov 16, 4:20 AM PST, 4 hours 50 minutes earlier.

Area forecast discussion, Nov 16, 4:20 AM PST, 4 hours 50 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
Nov 16, 2:00 AM PST	Wind Advisory	LOX	Los Angeles	37 hr
Nov 16, 1:58 PM PST	Small Craft Advisory	LOX		23 hr

Nearby

Red Flag Warnings in California, 2019 Every red flag warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.