Alert archive / Washington / Wind Advisories in 2011

Wind Advisory 8, NWS Seattle, WA

March 9, 2011San Juan County, Washington

NWS Seattle, WA issued this wind advisory at Mar 9, 2011, 6:35 AM PST for San Juan County, Washington. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Mar 9, 2011, 6:35 AM PST (14:35 UTC)
Expired
Mar 9, 2011, 12:00 PM 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 14:38 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, 2.6 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 2011-03-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 36 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Quillayute State, WA at 12:00Z on 2011-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 413 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
36 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
494 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
413 m²/s²
0-3 km storm-relative helicity
541 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.

202 
WWUS76 KSEW 091435
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
635 AM PST WED MAR 9 2011

WAZ001-503-506-510-100000-
/O.NEW.KSEW.WI.Y.0008.110309T1435Z-110309T2000Z/
/O.CON.KSEW.HW.A.0003.110310T1400Z-110311T0000Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
635 AM PST WED MAR 9 2011

...WIND ADVISORY IN EFFECT FOR THE NORTHWEST INTERIOR UNTIL NOON
PST TODAY...
...HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL NOON TODAY. A HIGH WIND
WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY
AFTERNOON.

* SOME AFFECTED LOCATIONS...OAK HARBOR...BELLINGHAM...FRIDAY
  HARBOR...AND MOUNT VERNON.

* WINDS...SOUTHERLY 20 TO 30 MPH WITH GUSTS NEAR 45 MPH THIS
  MORNING...EXCEPT 30 TO 35 MPH WITH GUSTS NEAR 50 MPH ACROSS
  WHIDBEY ISLAND. EXPECT THE WINDS TO DIMINISH THIS AFTERNOON.
  HOWEVER SOUTHERLY WINDS WILL PICK UP AGAIN ON THURSDAY INTO THE
  25 TO 35 MPH RANGE WITH GUSTS NEAR 60 MPH.

* TIMING...WINDS WILL PEAK LATE THIS MORNING AND THEN SUBSIDE.
  HOWEVER WINDS WILL INCREASE ON THURSDAY...WITH THE STRONGEST
  SPEEDS EXPECTED TO OCCUR DURING THE LATE MORNING THROUGH EARLY
  AFTERNOON TIME FRAME.

* IMPACTS...THE STRONG AND GUSTY WINDS WILL LIKELY RESULT IN SOME
  POWER OUTAGES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS CONDITIONS ARE FAVORABLE FOR DAMAGING
WINDS. HIGH WINDS CAN TOPPLE TREES...DOWN POWER LINES...AND
DAMAGE SOME STRUCTURES.

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.

&&

$$

WAZ516-517-100000-
/O.CON.KSEW.HW.A.0003.110310T1400Z-110311T0000Z/
NORTH COAST-CENTRAL COAST-
635 AM PST WED MAR 9 2011

...HIGH WIND WATCH REMAINS IN EFFECT FOR THE COAST FROM THURSDAY
MORNING THROUGH THURSDAY AFTERNOON...

A HIGH WIND WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH
THURSDAY AFTERNOON.

* SOME AFFECTED LOCATIONS...HOQUIAM AND FORKS.

* WINDS...EXPECTED TO INCREASE FROM THE SOUTH AT 25 TO 35 MPH
  WITH GUSTS NEAR 60 MPH ON THURSDAY. 

* TIMING...THE STRONGEST WINDS ARE EXPECTED TO OCCUR DURING THE 
  LATE MORNING THROUGH EARLY AFTERNOON TIME FRAME.

* IMPACTS...THE POTENTIALLY DAMAGING WINDS WILL LIKELY RESULT 
  IN SOME POWER OUTAGES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WATCH MEANS CONDITIONS ARE FAVORABLE FOR DAMAGING
WINDS. HIGH WINDS CAN TOPPLE TREES...DOWN POWER LINES...AND
DAMAGE SOME STRUCTURES.

&&

$$

WWW.WEATHER.GOV/SEATTLE

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 4:02 PM PSTWinter Storm WarningSEW24 hr
Mar 9, 2:39 AM PSTGale WatchSEW12 hr
Mar 9, 2:46 AM PSTWinter Weather AdvisorySEW13 hr
Mar 9, 3:24 AM PSTHigh Wind WatchSEWSan Juan20 hr
Mar 9, 2:05 PM PSTRiver Flood AdvisorySEWMason14 hr
Mar 9, 2:49 PM PSTGale WarningSEW33 hr
Mar 9, 2:49 PM PSTSmall Craft Advisory for Rough BarSEW11 days

Nearby

Wind Advisories in Washington, 2011Every wind advisory in 2011

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.