Alert archive / California / Special Weather Statements in 2021

Special Weather Statement, NWS Sacramento, CA

March 9, 2021Shasta County, California

NWS Sacramento, CA issued this special weather statement at Mar 9, 2021, 4:53 PM PST for Shasta County, California. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Mar 9, 2021, 4:53 PM PST (00:53 UTC)
Expired
Mar 9, 2021, 5:30 PM PST
In force
37 min
Issued by
NWS Sacramento, CA

County Shasta County, CA

The radar

The Beale AFB radar (KBBX), 137 km from the middle of the area, began a volume at 00:53 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

Oakland, CA (KOAK), launched 00:00Z, 0.9 hours before the alert went out and 321 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, Oakland, CA at 00:00Z on 2021-03-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 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, Oakland, CA at 00:00Z on 2021-03-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939587897Sfc1 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
32 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1066 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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The office that day

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

IssuedProductOfficeCountiesLasted
Mar 9, 4:36 PM PSTSpecial Weather StatementSTOTehama39 min
Mar 10, 3:52 AM PSTWinter Weather AdvisorySTO6 hr
Mar 10, 1:15 PM PSTSpecial Weather StatementSTOYolo45 min
Mar 10, 2:05 PM PSTSpecial Weather StatementSTOYolo55 min
Mar 10, 2:13 PM PSTSpecial Weather StatementSTOGlenn32 min

Nearby

Special Weather Statements in California, 2021Every special weather statement in 2021

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.