Alert archive / California / Flash Flood Warnings in 2024

Flash Flood Warning 5, NWS Sacramento, CA

November 11, 2024Tehama County, California

NWS Sacramento, CA issued this flash flood warning at Nov 11, 2024, 9:14 AM PST for Tehama County, California. It was in force for 4 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 11, 2024, 9:14 AM PST (17:14 UTC)
Expired
Nov 11, 2024, 12:44 PM PST
In force
4 hr
Issued by
NWS Sacramento, CA
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

County Tehama County, CA

The radar

The Beale AFB radar (KBBX), 87 km from the middle of the area, began a volume at 17:16 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 5.2 hours before the alert went out and 254 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-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 2024-11-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2024-11-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
7 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1831 m above ground
0-6 km bulk shear
85 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 11, 8:37 AM PSTSpecial Weather StatementSTOTehama38 min
Nov 11, 9:25 AM PSTSpecial Weather StatementSTOTehama35 min
Nov 11, 9:56 AM PSTSpecial Weather StatementSTOButte34 min
Nov 11, 10:06 AM PSTFlash Flood Warning Considerable damage threatSTOButte3 hr

Nearby

Flash Flood Warnings in California, 2024Every flash flood warning in 2024

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.