Alert archive / Washington / Wind Advisories in 2017

Wind Advisory 22, NWS Seattle, WA

November 25, 2017San Juan County, Washington

NWS Seattle, WA issued this wind advisory at Nov 25, 2017, 3:57 AM PST for San Juan County, Washington. It took effect at Nov 26, 2017, 12:00 AM PST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Nov 25, 2017, 3:57 AM PST (11:57 UTC)
In effect from: Nov 26, 2017, 12:00 AM PST
Expired: Nov 26, 2017, 8:50 AM PST
In force: 9 hr
Issued by: NWS Seattle, WA

County San Juan County, WA

The nearest sounding before it

Quillayute State, WA (KUIL), launched 00:00Z, 12.0 hours before the alert went out and 127 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: 68 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 538 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Seattle, WA wrote its last area forecast discussion before this wind advisory went out at Nov 25, 3:35 AM PST, 22 minutes earlier.

Area forecast discussion, Nov 25, 3:35 AM PST, 22 minutes before

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The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

Issued	Product	Office	Lasted
Nov 25, 2:42 AM PST	Gale Warning	SEW	48 hr
Nov 25, 2:42 AM PST	Small Craft Advisory for Rough Bar	SEW	8 days
Nov 25, 2:42 AM PST	Small Craft Advisory	SEW	6 hr
Nov 25, 8:58 AM PST	Small Craft Advisory	SEW	57 hr
Nov 25, 2:46 PM PST	Gale Watch	SEW	12 hr

Nearby

Wind Advisories in Washington, 2017 Every wind advisory 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.