Alert archive / California / Special Weather Statements in 2017

Special Weather Statement, NWS Eureka, CA

February 5, 2017Humboldt County, California

NWS Eureka, CA issued this special weather statement at Feb 5, 2017, 5:38 PM PST for Humboldt 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: Feb 5, 2017, 5:38 PM PST (01:38 UTC)
Expired: Feb 5, 2017, 6:15 PM PST
In force: 37 min
Issued by: NWS Eureka, CA

County Humboldt County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 54 km from the middle of the area, began a volume at 01:37 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 00:00Z, 1.6 hours before the alert went out and 191 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: 17 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 1930 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 227 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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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 Feb 5, 4:05 PM PST, 1 hour 33 minutes earlier.

Area forecast discussion, Feb 5, 4:05 PM PST, 1 hour 33 minutes before

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Hazardous weather outlook, Feb 5, 4:02 PM PST, 1 hour 36 minutes before

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In the hours before

Special weather statement, Feb 5, 5:11 PM PST, 27 minutes before

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Special weather statement, Feb 5, 5:38 PM PST, 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
Feb 5, 4:54 PM PST	Severe Thunderstorm Warning	EKA	Humboldt	36 min
Feb 5, 5:11 PM PST	Special Weather Statement	EKA	Humboldt	34 min
Feb 5, 10:26 PM PST	Coastal Flood Advisory	EKA	Humboldt	11 hr
Feb 6, 2:57 AM PST	Small Craft Advisory	EKA		6 hr
Feb 6, 9:36 AM PST	Gale Warning	EKA		23 hr
Feb 6, 9:38 AM PST	Wind Advisory	EKA	Humboldt, Mendocino, Trinity	25 hr
Feb 6, 10:45 AM PST	Flood Watch	EKA	Humboldt, Mendocino, Trinity	20 hr
Feb 6, 2:45 PM PST	Small Craft Advisory	EKA		37 hr
Feb 6, 3:19 PM PST	High Wind Watch	EKA	Del Norte, Humboldt, Trinity	23 hr
Feb 6, 3:20 PM PST	River Flood Watch	EKA	Humboldt	18 hr
Feb 6, 3:20 PM PST	River Flood Watch	EKA	Mendocino	14 hr
Feb 6, 3:32 PM PST	River Flood Advisory	EKA	Mendocino	36 hr

Nearby

Special Weather Statements in California, 2017 Every special weather statement in 2017

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.