Alert archive / California / Wind Advisories in 2017

Wind Advisory 19, NWS Eureka, CA

February 20, 2017Del Norte County, Humboldt County, Mendocino County, California

NWS Eureka, CA issued this wind advisory at Feb 20, 2017, 3:40 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Feb 20, 2017, 7:00 PM PST. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued
Feb 20, 2017, 3:40 PM PST (23:40 UTC)
In effect from
Feb 20, 2017, 7:00 PM PST
Expired
Feb 21, 2017, 9:00 AM PST
In force
14 hr
Issued by
NWS Eureka, CA

Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 47 km from the middle of the area, began a volume at 23:41 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

Medford/Jackson, OR (KMFR), launched 12:00Z, 11.7 hours before the alert went out and 210 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, Medford/Jackson, OR at 12:00Z on 2017-02-20Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2017-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 277 square meters per square second.1939587897117136156Sfc1 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
910 m above ground
0-6 km bulk shear
118 kt
0-1 km storm-relative helicity
277 m²/s²
0-3 km storm-relative helicity
591 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

360 
WWUS76 KEKA 202340
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
340 PM PST Mon Feb 20 2017

.A developing storm system will bring a return of strong 
southerly winds to the area tonight early Tuesday. Winds will
diminish from south to north Tuesday morning.

CAZ104>108-110-111-211245-
/O.UPG.KEKA.HW.A.0005.170221T0000Z-170221T1200Z/
/O.NEW.KEKA.HW.W.0004.170221T0300Z-170221T1700Z/
Southwestern Humboldt-Northern Humboldt Interior-
Southern Humboldt Interior-Northern Trinity-Southern Trinity-
Northwestern Mendocino Interior-Northeastern Mendocino Interior-
340 PM PST Mon Feb 20 2017

...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO 9 AM
TUESDAY... 

* WINDS...South winds will increase again tonight with speeds of
  30 to 40 mph and gusts to 50 to 70 mph over exposed coastal
  headlands and higher inland ridges. Elsewhere, south winds will
  increase to 25 to 35 mph with gusts of 45 to 55 mph. 

* LOCATIONS INCLUDE...Near Petrolia, Honeydew, Ettersberg, Willow
  Creek, Orleans, Garberville, Bridgeville, Weaverville, Burnt
  Ranch, Trinity Center, Hayfork. Ruth, Legget, and Laytonville.

* HIGHWAYS IMPACTED...Portions of 101, 299, 96, 36, 3, and 162.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

$$

CAZ101-102-211245-
/O.NEW.KEKA.HW.W.0004.170221T0300Z-170221T1700Z/
Coastal Del Norte-Del Norte Interior-
340 PM PST Mon Feb 20 2017

...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO 9 AM 
TUESDAY...

* WINDS...South winds will increase again tonight with speeds of
  30 to 40 mph and gusts to 50 to 70 mph over exposed coastal
  headlands and higher inland ridges. Elsewhere, south winds will
  increase to 25 to 35 mph with gusts of 45 to 55 mph.

* LOCATIONS INCLUDE...Crescent City and Gasquet.

* HIGHWAYS IMPACTED...Portions of 101 and 199.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A High Wind Warning means a hazardous high wind event is expected
or occurring. Sustained wind speeds of at least 40 mph or gusts
of 58 mph or more can lead to property damage.

$$

CAZ109-113-211245-
/O.UPG.KEKA.HW.A.0005.170221T0000Z-170221T1200Z/
/O.NEW.KEKA.WI.Y.0019.170221T0300Z-170221T1700Z/
Mendocino Coast-Southeastern Mendocino Interior-
340 PM PST Mon Feb 20 2017

...WIND ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 9 AM 
TUESDAY...

* WINDS...South winds will increase again tonight with speeds of
  25 to 35 mph and gusts of 45 to 55 mph.

* LOCATIONS INCLUDE...Point Arena, Ukiah, and Hopland.

* HIGHWAYS IMPACTED...Portions of 1 and 101.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult,especially for high
profile vehicles. Use extra caution.

$$

CAZ103-112-211245-
/O.NEW.KEKA.WI.Y.0019.170221T0300Z-170221T1700Z/
Northern Humboldt Coast-Southwestern Mendocino Interior-
340 PM PST Mon Feb 20 2017

...WIND ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 9 AM 
TUESDAY...

* WINDS...South winds will increase again tonight with speeds of
  25 to 35 mph and gusts of 45 to 55 mph.

* LOCATIONS INCLUDE...Arcata, Eureka, Fortuna, Boonville, and
  Comptche.

* HIGHWAYS IMPACTED...Portions of 101 and 128.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult,especially for high
profile vehicles. Use extra caution.

$$
2 follow-up statements
341 
WWUS76 KEKA 210954
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
154 AM PST Tue Feb 21 2017

.A storm system passing NW of the area will bring strong 
southwesterly winds to the area early this morning. Winds will 
diminish from south to north this morning.

CAZ101-102-104>106-211700-
/O.CAN.KEKA.HW.W.0004.000000T0000Z-170221T1700Z/
/O.EXA.KEKA.WI.Y.0019.000000T0000Z-170221T1700Z/
Coastal Del Norte-Del Norte Interior-Southwestern Humboldt-
Northern Humboldt Interior-Southern Humboldt Interior-
154 AM PST Tue Feb 21 2017

...WIND ADVISORY IN EFFECT UNTIL 9 AM PST THIS MORNING...
...HIGH WIND WARNING IS CANCELLED...

The National Weather Service in Eureka has issued a Wind
Advisory...which is in effect until 9 AM PST this morning. the
High Wind Warning has been canceled. 

* WINDS...Southwest winds will peak around 25 to 35 mph with 
  gusts of 40 to 50 mph early this morning.


* LOCATIONS INCLUDE...Crescent City...Gasquet...Patrolia... 
  Honeydew...Ettersberg.

* HIGHWAY(S) IMPACTED...Hwy 101...Hwy 199...Hwy 299...HWY 96...HWY
  36.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Advisory means that winds of 35 mph are expected. Winds
this strong can make driving difficult,especially for high
profile vehicles. Use extra caution.

&&

$$

CAZ107-108-110-111-211100-
/O.CAN.KEKA.HW.W.0004.000000T0000Z-170221T1700Z/
Northern Trinity-Southern Trinity-Northwestern Mendocino Interior-
Northeastern Mendocino Interior-
154 AM PST Tue Feb 21 2017

...HIGH WIND WARNING IS CANCELLED...

The National Weather Service in Eureka has cancelled the High
Wind Warning. 

The low pressure system bringing the winds is now moving north of
the area and weakening. Winds are now expected to be southwest 10
to 20 mph this morning. 

$$

CAZ109-112-113-211100-
/O.CAN.KEKA.WI.Y.0019.000000T0000Z-170221T1700Z/
Mendocino Coast-Southwestern Mendocino Interior-
Southeastern Mendocino Interior-
154 AM PST Tue Feb 21 2017

...WIND ADVISORY IS CANCELLED...

The National Weather Service in Eureka has cancelled the Wind
Advisory. 

The low pressure system bringing the winds is now moving north of
the area and weakening. Winds are now expected to be southwest 10
to 20 mph this morning. 

$$

CAZ103-211700-
/O.CON.KEKA.WI.Y.0019.000000T0000Z-170221T1700Z/
Northern Humboldt Coast-
154 AM PST Tue Feb 21 2017

...WIND ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING...

* WINDS...Southwest winds will peak around 25 to 35 mph with 
  gusts of 40 to 50 mph early this morning.

* LOCATIONS INCLUDE...Arcata...Eureka...Fortuna.

* HIGHWAY(S) IMPACTED...Hwy 101.

* FOR A DETAILED VIEW OF THE HAZARD AREA...visit 
  http://www.wrh.noaa.gov/map

$$
144 
WWUS76 KEKA 211707
NPWEKA

URGENT - WEATHER MESSAGE
National Weather Service Eureka CA
907 AM PST Tue Feb 21 2017

CAZ101>106-211815-
/O.EXP.KEKA.WI.Y.0019.000000T0000Z-170221T1700Z/
Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast-
Southwestern Humboldt-Northern Humboldt Interior-
Southern Humboldt Interior-
907 AM PST Tue Feb 21 2017

...WIND ADVISORY HAS EXPIRED...

WINDS WILL CONTINUE TO DIMINISH THROUGH THE DAY.

$$

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 19, 4:06 PM PSTHigh Wind WatchEKAHumboldt, Mendocino, Trinity24 hr
Feb 19, 4:06 PM PSTWind AdvisoryEKADel Norte, Humboldt3 hr
Feb 19, 7:19 PM PSTWind AdvisoryEKADel Norte, Humboldt13 hr
Feb 19, 9:16 PM PSTGale WatchEKA18 hr
Feb 20, 4:33 AM PSTRiver Flood WarningEKAMendocino37 hr
Feb 20, 9:00 AM PSTSmall Craft AdvisoryEKA6 hr
Feb 20, 11:58 AM PSTHazardous Seas WarningEKA12 hr
Feb 20, 2:48 PM PSTRiver Flood WatchEKAMendocino5 hr
Feb 20, 3:06 PM PSTGale WarningEKA18 hr
Feb 20, 3:40 PM PSTHigh Wind WarningEKADel Norte, Humboldt, Mendocino, Trinity10 hr

Nearby

Wind Advisories in California, 2017Every 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; radar from the NEXRAD Level II archive.