Alert archive / Washington / Wind Advisories in 2012

Wind Advisory 9, NWS Seattle, WA

January 28, 2012San Juan County, Washington

NWS Seattle, WA issued this wind advisory at Jan 28, 2012, 10:41 PM PST for San Juan County, Washington. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Jan 28, 2012, 10:41 PM PST (06:41 UTC)
Expired: Jan 29, 2012, 4:04 AM PST
In force: 5 hr
Issued by: NWS Seattle, WA

County San Juan County, WA

The radar

The Seattle radar (KATX), 54 km from the middle of the area, began a volume at 06:44 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

Quillayute State, WA (KUIL), launched 00:00Z, 6.7 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1519 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 542 m²/s²
0-3 km storm-relative helicity: 736 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.

694 
WWUS76 KSEW 290641
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
1041 PM PST SAT JAN 28 2012

.A COLD FRONT WILL SLIDE DOWN FROM BRITISH COLUMBIA TONIGHT
LEADING TO WINDY CONDITIONS ACROSS THE NORTH INTERIOR. WINDS WILL
EASE SUNDAY MORNING.

WAZ001-503-506-510-291300-
/O.NEW.KSEW.WI.Y.0009.120129T0641Z-120129T1800Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
1041 PM PST SAT JAN 28 2012

...WIND ADVISORY IN EFFECT UNTIL 10 AM PST SUNDAY...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM PST SUNDAY. 

* SOME AFFECTED LOCATIONS...BELLINGHAM...FRIDAY HARBOR...ANACORTES...OAK
  HARBOR.

* TIMING...WINDS WILL INCREASE OVERNIGHT THEN EASE SUNDAY MORNING. 

* WIND...SOUTH TO SOUTHEAST WIND 25 TO 35 MPH WITH GUSTS TO 50
  MPH. 

* IMPACTS...LOCAL DAMAGE TO TREES AND POWER LINES POSSIBLE...WITH
  SMALL TREES POSSIBLY BEING TOPPLED DUE TO SATURATED SOILS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR
GUSTS OF 45 TO 57 MPH ARE LIKELY.

&&

$$

33

1 follow-up statement

255 
WWUS76 KSEW 291204
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
404 AM PST SUN JAN 29 2012

...WIND ADVISORY FOR THE NORTH INTERIOR CANCELLED...

WAZ001-503-506-510-291315-
/O.CAN.KSEW.WI.Y.0009.000000T0000Z-120129T1800Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
404 AM PST SUN JAN 29 2012

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE WIND
ADVISORY. 

WINDS HAVE DIMINISHED. STRONG WIND IS NO LONGER EXPECTED.

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 28, 8:44 PM PST	Small Craft Advisory for Rough Bar	SEW		5 days
Jan 28, 8:44 PM PST	Small Craft Advisory	SEW		30 hr

Nearby

Wind Advisories in Washington, 2012 Every wind advisory 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.