Alert archive / California / Special Weather Statements in 2013

Special Weather Statement, NWS Eureka, CA

August 21, 2013Humboldt County, California

NWS Eureka, CA issued this special weather statement at Aug 21, 2013, 1:59 PM PDT for Humboldt County, California. It was in force for 46 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: Aug 21, 2013, 1:59 PM PDT (20:59 UTC)
Expired: Aug 21, 2013, 2:45 PM PDT
In force: 46 min
Issued by: NWS Eureka, CA

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 61 km from the middle of the area, began a volume at 21:02 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, 9.0 hours before the alert went out and 212 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: 2413 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 32 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 Eureka, CA wrote its last area forecast discussion before this special weather statement went out at Aug 21, 9:47 AM PDT, 4 hours 12 minutes earlier.

Area forecast discussion, Aug 21, 9:47 AM PDT, 4 hours 12 minutes before

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Hazardous weather outlook, Aug 21, 5:39 AM PDT, 8 hours 20 minutes before

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In the hours before

Special weather statement, Aug 21, 1:18 PM PDT, 41 minutes before

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Special weather statement, Aug 21, 1:59 PM PDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 3:09 AM PDT	Small Craft Advisory	EKA		12 hr
Aug 21, 1:18 PM PDT	Special Weather Statement	EKA	Trinity	42 min
Aug 21, 2:22 PM PDT	Severe Thunderstorm Warning	EKA	Humboldt, Trinity	38 min
Aug 21, 2:40 PM PDT	Special Weather Statement	EKA	Trinity	50 min
Aug 21, 2:56 PM PDT	Severe Thunderstorm Warning	EKA	Trinity	49 min
Aug 21, 4:18 PM PDT	Special Weather Statement	EKA	Del Norte	42 min
Aug 21, 4:33 PM PDT	Special Weather Statement	EKA	Trinity	27 min

Nearby

Special Weather Statements in California, 2013 Every special weather statement in 2013

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.