Alert archive / Washington / Wind Advisories in 2012

Wind Advisory 2, NWS Seattle, WA

January 2, 2012San Juan County, Washington

NWS Seattle, WA issued this wind advisory at Jan 2, 2012, 3:03 PM PST for San Juan County, Washington. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Jan 2, 2012, 3:03 PM PST (23:03 UTC)
Expired
Jan 2, 2012, 10:00 PM PST
In force
7 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 23:05 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 12:00Z, 11.1 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-pSkew-T log-p diagram, Quillayute State, WA at 12:00Z on 2012-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Quillayute State, WA at 12:00Z on 2012-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 438 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
2440 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
438 m²/s²
0-3 km storm-relative helicity
502 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.

136 
WWUS76 KSEW 022303
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
303 PM PST MON JAN 2 2012

...WINDY THIS AFTERNOON AND EVENING COAST AND NORTHWEST INTERIOR...

.A FRONT WILL BRING WINDY CONDITIONS TO THE COAST AND NORTHWEST
INTERIOR THIS AFTERNOON AND EVENING. WINDS WILL EASE LATER TONIGHT
AS THE FRONT MOVES INLAND.

WAZ001-503-506-510-516-517-030600-
/O.NEW.KSEW.WI.Y.0002.120102T2303Z-120103T0600Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-NORTH COAST-CENTRAL COAST-
303 PM PST MON JAN 2 2012

...WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 10 PM PST THIS EVENING. 

* SOME AFFECTED LOCATIONS...NORTH COAST...CENTRAL COAST...AND
  NORTHWEST INTERIOR. 

* TIMING...THROUGH LATE THIS EVENING.

* WIND...SOUTHEAST 20 TO 35 MPH WITH GUSTS TO 55 MPH POSSIBLE.

* IMPACTS...LOCAL POWER OUTAGES ARE POSSIBLE. SMALL TREE BRANCHES
  CAN SNAP.

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. WINDS THIS STRONG CAN SNAP
SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW ROOTED TREES...AND
CAUSE LOCAL POWER OUTAGES.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 1, 8:55 PM PSTSmall Craft Advisory for Rough BarSEW6 days
Jan 2, 1:24 PM PSTGale WarningSEW53 hr
Jan 2, 1:24 PM PSTSmall Craft AdvisorySEW20 hr
Jan 2, 3:44 PM PSTFlood WatchSEW17 hr

Nearby

Wind Advisories in Washington, 2012Every 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.