Alert archive / Washington / High Wind Warnings in 2012

High Wind Warning 9, NWS Seattle, WA

November 18, 2012San Juan County, Washington

NWS Seattle, WA issued this high wind warning at Nov 18, 2012, 9:40 AM PST for San Juan County, Washington. It took effect at Nov 18, 2012, 1:00 PM PST. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 18, 2012, 9:40 AM PST (17:40 UTC)
In effect from
Nov 18, 2012, 1:00 PM PST
Expired
Nov 18, 2012, 10:00 PM PST
In force
9 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 17:40 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, 5.7 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-pSkew-T log-p diagram, Quillayute State, WA at 12:00Z on 2012-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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 2012-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 square meters per square second.19395878Sfc1 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
6 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
145 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.

182 
WWUS76 KSEW 181740
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
940 AM PST SUN NOV 18 2012

.A VIGOROUS FRONTAL SYSTEM WILL PRODUCE STRONG WINDS AT THE COAST
AND IN THE NORTH INTERIOR OF WESTERN WASHINGTON THIS AFTERNOON AND
EVENING. STRONG WINDS ARE ALSO POSSIBLE ALONG THE COAST ON MONDAY
AS ANOTHER SYSTEM MOVES INLAND.

WAZ516-517-190315-
/O.UPG.KSEW.WI.Y.0029.121118T2000Z-121119T0500Z/
/O.NEW.KSEW.HW.W.0009.121118T2100Z-121119T0300Z/
/O.CON.KSEW.HW.A.0008.121119T1400Z-121120T0200Z/
NORTH COAST-CENTRAL COAST-
940 AM PST SUN NOV 18 2012

...HIGH WIND WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM
PST THIS EVENING...
...HIGH WIND WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH
MONDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM PST
THIS EVENING. THE WIND ADVISORY IS NO LONGER IN EFFECT. 

* SOME AFFECTED LOCATIONS...EXPOSED AREAS NEAREST THE COASTLINE
  WILL LIKELY HAVE THE STRONGEST WINDS...INCLUDING THE CITIES OF
  WESTPORT AND OCEAN SHORES.

* TIMING...STRONG SOUTHERLY WINDS WILL OCCUR FOR A FEW HOURS
  CENTERED ON 4 PM THIS AFTERNOON. WINDS WILL BECOME SOUTHWEST AND
  EASE LATE THIS EVENING. SOUTHERLY WINDS WILL RISE AGAIN MONDAY
  MORNING.

* WIND...SOUTHERLY SUSTAINED WINDS OF 25 TO 40 MPH WITH GUSTS TO
  60 MPH ARE LIKELY. SOUTH WINDS WILL INCREASE AGAIN MONDAY
  MORNING AND AFTERNOON...WITH SPEEDS OF 30 TO 40 MPH WITH GUSTS
  TO 60 MPH POSSIBLE.

* IMPACTS...WINDS WILL BE STRONG ENOUGH TO KNOCK TREES AND
  BRANCHES DOWN. THIS CAN CAUSE PERSONAL INJURY. LOCAL POWER
  OUTAGES ARE POSSIBLE. USE CAUTION IF YOU ARE GOING TO BE OUTSIDE
  DURING HIGH WIND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT
OR OCCURRING.

A HIGH WIND WATCH MEANS THERE IS THE POTENTIAL FOR A DAMAGING WIND
EVENT. 

&&

$$

WAZ001-503-506-510-190315-
/O.UPG.KSEW.WI.Y.0029.121118T2000Z-121119T0500Z/
/O.NEW.KSEW.HW.W.0009.121119T0000Z-121119T0600Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
940 AM PST SUN NOV 18 2012

...HIGH WIND WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 PM
PST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A HIGH WIND
WARNING...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 PM
PST THIS EVENING. THE WIND ADVISORY IS NO LONGER IN EFFECT. 

* SOME AFFECTED LOCATIONS...EXPOSED SPOTS NEAREST THE SHORE WILL
  LIKELY HAVE THE STRONGEST WINDS...ALONG WITH HIGHER TERRAIN.

* TIMING...STRONG SOUTHERLY WINDS WILL OCCUR FOR A FEW HOURS
  CENTERED ON 7 PM THIS EVENING. WINDS WILL BECOME SOUTHWEST AND
  EASE LATE THIS EVENING. SOUTHERLY WINDS WILL RISE AGAIN MONDAY
  MORNING.

* WIND...SOUTHERLY SUSTAINED WINDS OF 25 TO 40 MPH WITH GUSTS TO
  60 MPH ARE LIKELY.

* IMPACTS...WINDS OF THESE SPEEDS CAN KNOCK TREES AND BRANCHES TO
  THE GROUND. THIS CAN CAUSE PERSONAL INJURY. LOCAL POWER OUTAGES
  ARE POSSIBLE. USE CAUTION IF YOU ARE GOING TO BE OUTSIDE
  DURING HIGH WIND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT
OR OCCURRING.

&&

$$
BURKE
1 follow-up statement
177 
WWUS76 KSEW 182312
NPWSEW

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SEATTLE WA
312 PM PST SUN NOV 18 2012

.A VIGOROUS FRONTAL SYSTEM WILL PRODUCE STRONG WINDS AT THE COAST
AND IN THE NORTH INTERIOR OF WESTERN WASHINGTON THIS AFTERNOON
AND EVENING. STRONG WINDS ARE ALSO POSSIBLE ALONG THE COAST ON
MONDAY AS ANOTHER SYSTEM MOVES INLAND.

WAZ516-517-190300-
/O.CAN.KSEW.HW.A.0008.121119T1400Z-121120T0200Z/
/O.CON.KSEW.HW.W.0009.000000T0000Z-121119T0300Z/
NORTH COAST-CENTRAL COAST-
312 PM PST SUN NOV 18 2012

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 7 PM PST THIS
EVENING...
...HIGH WIND WATCH FOR MONDAY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS CANCELLED THE HIGH
WIND WATCH FOR MONDAY. THE HIGH WIND WARNING THIS EVENING REMAINS
IN EFFECT.

* SOME AFFECTED LOCATIONS...EXPOSED AREAS NEAREST THE COASTLINE 
  WILL LIKELY HAVE THE STRONGEST WINDS...INCLUDING THE CITIES OF 
  WESTPORT AND OCEAN SHORES. 

* TIMING...STRONG SOUTHERLY WINDS WILL OCCUR FOR A FEW HOURS 
  CENTERED ON 4 PM THIS AFTERNOON. WINDS WILL BECOME SOUTHWEST 
  AND EASE LATE THIS EVENING. SOUTHERLY WINDS WILL RISE AGAIN 
  MONDAY MORNING. 

* WIND...SOUTHERLY SUSTAINED WINDS OF 25 TO 40 MPH WITH GUSTS TO
  60 MPH ARE LIKELY. WINDS WILL EASE TO 15 TO 30 MPH BY MIDNIGHT.

* IMPACTS...WINDS WILL BE STRONG ENOUGH TO KNOCK TREES AND 
  BRANCHES DOWN. THIS CAN CAUSE PERSONAL INJURY. LOCAL POWER 
  OUTAGES ARE POSSIBLE. USE CAUTION IF YOU ARE GOING TO BE 
  OUTSIDE DURING HIGH WIND. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT
OR OCCURRING.

&&

$$

WAZ001-503-506-510-190600-
/O.CON.KSEW.HW.W.0009.121119T0000Z-121119T0600Z/
SAN JUAN COUNTY-WESTERN WHATCOM COUNTY-WESTERN SKAGIT COUNTY-
ADMIRALTY INLET AREA-
312 PM PST SUN NOV 18 2012

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS
EVENING...

* SOME AFFECTED LOCATIONS...EXPOSED SPOTS NEAREST THE SHORE WILL 
  LIKELY HAVE THE STRONGEST WINDS...ALONG WITH HIGHER TERRAIN. 

* TIMING...STRONG SOUTHERLY WINDS WILL OCCUR FOR A FEW HOURS
  CENTERED ON 7 PM THIS EVENING. WINDS WILL BECOME SOUTHWEST AND
  EASE LATE THIS EVENING.

* WIND...SOUTHERLY SUSTAINED WINDS OF 25 TO 40 MPH WITH GUSTS TO 
  60 MPH ARE LIKELY. 

* IMPACTS...WINDS OF THESE SPEEDS CAN KNOCK TREES AND BRANCHES 
  TO THE GROUND. THIS CAN CAUSE PERSONAL INJURY. LOCAL POWER 
  OUTAGES ARE POSSIBLE. USE CAUTION IF YOU ARE GOING TO BE 
  OUTSIDE DURING HIGH WIND. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH WIND WARNING MEANS THAT A HAZARDOUS WIND EVENT IS IMMINENT
OR OCCURRING.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 18, 2:28 AM PSTGale WatchSEW12 hr
Nov 18, 2:28 AM PSTGale WarningSEW24 hr
Nov 18, 4:21 AM PSTHigh Wind WatchSEW11 hr
Nov 18, 4:21 AM PSTWind AdvisorySEWSan Juan5 hr
Nov 18, 4:21 AM PSTWinter Storm WarningSEW38 hr
Nov 18, 4:21 AM PSTWinter Weather AdvisorySEW26 hr
Nov 18, 3:20 PM PSTRiver Flood WarningSEWMason3 days

Nearby

High Wind Warnings in Washington, 2012Every high wind warning 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.