Alert archive / Virginia / Wind Advisories in 2012

Wind Advisory 4, NWS Wakefield, VA

December 20, 2012Accomack County, Northampton County, Virginia; Worcester County, Maryland

NWS Wakefield, VA issued this wind advisory at Dec 20, 2012, 9:12 PM EST for Accomack County, Northampton County, Virginia; Worcester County, Maryland. It took effect at Dec 21, 2012, 12:00 AM EST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Dec 20, 2012, 9:12 PM EST (02:12 UTC)
In effect from
Dec 21, 2012, 12:00 AM EST
Expired
Dec 21, 2012, 6:00 AM EST
In force
6 hr
Issued by
NWS Wakefield, VA

Counties Worcester County, MD, Accomack County, VA, Northampton County, VA

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 2.2 hours before the alert went out and 30 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, Wallops Is Stn, VA at 00:00Z on 2012-12-21Temperature 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, Wallops Is Stn, VA at 00:00Z on 2012-12-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 273 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
1081 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
273 m²/s²
0-3 km storm-relative helicity
300 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.

072 
WWUS71 KAKQ 210212
NPWAKQ

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE WAKEFIELD VA
912 PM EST THU DEC 20 2012


MDZ024-025-VAZ099-100-211100-
/O.NEW.KAKQ.WI.Y.0004.121221T0500Z-121221T1100Z/
INLAND WORCESTER-MARYLAND BEACHES-ACCOMACK-NORTHAMPTON VA-
INCLUDING THE CITIES OF...SNOW HILL...OCEAN CITY...CHINCOTEAGUE...
WALLOPS ISLAND...MELFA...EASTVILLE
912 PM EST THU DEC 20 2012

...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM EST
FRIDAY...

THE NATIONAL WEATHER SERVICE IN WAKEFIELD HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 6 AM EST
FRIDAY. 

* AREAS AFFECTED: PORTIONS THE LOWER EASTERN SHORE...FROM
  WORCESTER COUNTY MARYLAND SOUTH TO NORTHAMPTON COUNTY VIRGINIA. 

* HAZARDS: STRONG WINDS.

* WINDS: SOUTHEAST 25 TO 35 MPH WITH GUSTS TO 45 MPH...BECOMING
  SOUTHWEST LATE.

* TIMING: BETWEEN MIDNIGHT AND 6 AM EST.

* IMPACTS: SOME DOWNED TREE LIMBS WILL BE POSSIBLE. IN ADDITION...WINDS
  THIS STRONG MAY MAKE DRIVING DIFFICULT...PARTICULARLY FOR HIGH
  PROFILE VEHICLES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS ARE FORECAST TO BE
31 TO 39 MPH OR GUSTS WILL RANGE BETWEEN 46 AND 57 MPH.  WINDS OF
THESE MAGNITUDES MAY CAUSE MINOR PROPERTY DAMAGE WITHOUT EXTRA
PRECAUTIONS. MOTORISTS IN HIGH PROFILE VEHICLES SHOULD USE CAUTION
UNTIL THE WINDS SUBSIDE.

&&

$$

BROWN
1 follow-up statement
376 
WWUS71 KAKQ 211106
NPWAKQ

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE WAKEFIELD VA
606 AM EST FRI DEC 21 2012

MDZ024-025-VAZ099-100-211215-
/O.EXP.KAKQ.WI.Y.0004.000000T0000Z-121221T1100Z/
INLAND WORCESTER-MARYLAND BEACHES-ACCOMACK-NORTHAMPTON VA-
INCLUDING THE CITIES OF...SNOW HILL...OCEAN CITY...CHINCOTEAGUE...
WALLOPS ISLAND...MELFA...EASTVILLE
606 AM EST FRI DEC 21 2012

...WIND ADVISORY HAS EXPIRED...

THE WIND ADVISORY IS NO LONGER IN EFFECT. HOWEVER...WIND GUSTS
BETWEEN 30 AND 35 MPH WILL STILL BE COMMON TODAY.

$$

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 20, 8:52 PM ESTCoastal Flood AdvisoryAKQAccomack9 hr
Dec 21, 6:17 AM ESTCoastal Flood WarningAKQAccomack10 hr
Dec 21, 7:58 AM ESTCoastal Flood AdvisoryAKQNorthumberland, Westmoreland3 hr
Dec 21, 2:20 PM ESTWind AdvisoryAKQAccomack, Caroline, Gloucester, Lancaster, Mathews, Middlesex and 4 more25 hr
Dec 21, 4:56 PM ESTCoastal Flood AdvisoryAKQAccomack4 hr

Nearby

Wind Advisories in Virginia, 2012Wind Advisories in Maryland, 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.