Alert archive / California / Special Weather Statements in 2012

Special Weather Statement, NWS Sacramento, CA

October 22, 2012Shasta County, California

NWS Sacramento, CA issued this special weather statement at Oct 22, 2012, 1:11 PM PDT for Shasta County, California. It was in force for 49 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: Oct 22, 2012, 1:11 PM PDT (20:11 UTC)
Expired: Oct 22, 2012, 2:00 PM PDT
In force: 49 min
Issued by: NWS Sacramento, CA

County Shasta County, CA

The radar

The Beale AFB radar (KBBX), 128 km from the middle of the area, began a volume at 20:12 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, 8.2 hours before the alert went out and 210 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: 668 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sacramento, CA wrote its last area forecast discussion before this special weather statement went out at Oct 22, 8:50 AM PDT, 4 hours 21 minutes earlier.

Area forecast discussion, Oct 22, 8:50 AM PDT, 4 hours 21 minutes before

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Hazardous weather outlook, Oct 22, 3:57 AM PDT, 9 hours 14 minutes before

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In the hours before

Local storm report, Oct 22, 8:13 AM PDT, 4 hours 58 minutes before

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Local storm report, Oct 22, 8:53 AM PDT, 4 hours 18 minutes before

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Local storm report, Oct 22, 8:59 AM PDT, 4 hours 12 minutes before

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Local storm report, Oct 22, 9:28 AM PDT, 3 hours 43 minutes before

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Local storm report, Oct 22, 11:54 AM PDT, 1 hour 17 minutes before

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Special weather statement, Oct 22, 1:11 PM PDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 22, 1:42 PM PDT	Special Weather Statement	STO	Tehama	48 min
Oct 22, 2:13 PM PDT	Special Weather Statement	STO	Yuba	62 min
Oct 22, 2:37 PM PDT	Tornado Warning	STO	Butte, Yuba	38 min
Oct 22, 3:14 PM PDT	Tornado Warning	STO	Sutter, Yuba	31 min
Oct 22, 3:42 PM PDT	Tornado Warning	STO	Nevada, Yuba	48 min
Oct 22, 3:52 PM PDT	Special Weather Statement	STO	Shasta	38 min
Oct 22, 4:11 PM PDT	Tornado Warning	STO	Nevada, Placer, Yuba	49 min

Nearby

Special Weather Statements in California, 2012 Every special weather statement in 2012

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.