Alert archive / Virginia / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 310, NWS Baltimore/Washington

July 27, 2008Clarke County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 27, 2008, 12:10 PM EDT for Clarke County, Virginia. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 27, 2008, 12:10 PM EDT (16:10 UTC)
Expired
Jul 27, 2008, 12:42 PM EDT
In force
32 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

County Clarke County, VA

The radar

The Sterling radar (KLWX), 40 km from the middle of the area, began a volume at 16:11 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 4.2 hours before the alert went out and 48 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, Washington/Dulle, VA at 12:00Z on 2008-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1356 joules per kilogram.LCLLFCEL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2008-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.193958Sfc1 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
1356 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KLWX 271610
SVRLWX
VAC043-271700-
/O.NEW.KLWX.SV.W.0310.080727T1610Z-080727T1700Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1210 PM EDT SUN JUL 27 2008

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CLARKE COUNTY IN NORTHWEST VIRGINIA...

* UNTIL 100 PM EDT

* AT 1207 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM.  THIS STORM WAS LOCATED NEAR BERRYVILLE...AND
  MOVING EAST AT 16 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BERRYVILLE...
  BOYCE...

HAIL TO THE SIZE OF PENNIES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED
IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE
STORM HAS PASSED.

LAT...LON 3913 7784 3912 7785 3911 7785 3908 7786
      3904 7792 3900 7800 3907 7813 3919 7806
TIME...MOT...LOC 1610Z 282DEG 14KT 3911 7802

$$

PELOQUIN
1 follow-up statement
000 
WWUS51 KLWX 271642
SVSLWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1242 PM EDT SUN JUL 27 2008

VAC043-271652-
/O.CAN.KLWX.SV.W.0310.000000T0000Z-080727T1700Z/
CLARKE VA-
1242 PM EDT SUN JUL 27 2008

...THE SEVERE THUNDERSTORM WARNING FOR CLARKE COUNTY IS CANCELLED...

THE THUNDERSTORM HAS MOVED OUT OF THE WARNED AREA AND WEAKENED BELOW
SEVERE LIMITS...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN
CANCELLED.

LAT...LON 3913 7784 3912 7785 3911 7785 3908 7786
      3904 7792 3900 7800 3907 7813 3919 7806
TIME...MOT...LOC 1642Z 282DEG 14KT 3908 7786

$$

PELOQUIN

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 26, 8:46 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Rappahannock59 min
Jul 26, 10:04 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Orange, Rappahannock, Spotsylvania56 min
Jul 27, 12:40 PM EDTSpecial Marine WarningLWX2 hr
Jul 27, 1:08 PM EDTSevere Thunderstorm WarningLWXFairfax, Loudoun, Prince William, City of Fairfax36 min
Jul 27, 1:11 PM EDTSpecial Marine WarningLWX2 hr
Jul 27, 1:13 PM EDTSevere Thunderstorm WarningLWXFairfax, Loudoun16 min
Jul 27, 1:18 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Orange, Spotsylvania, Stafford, City of Fredericksburg57 min
Jul 27, 1:30 PM EDTSevere Thunderstorm WarningLWXFairfax, Prince William, City of Alexandria, City of Fairfax, City of Manassas, City of Manassas Park45 min
Jul 27, 1:46 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, City of Alexandria, City of Falls Church44 min
Jul 27, 1:47 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Prince William, Rappahannock27 min
Jul 27, 1:52 PM EDTSpecial Marine WarningLWX113 min
Jul 27, 2:03 PM EDTSevere Thunderstorm WarningLWXFairfax, Prince William, Stafford42 min
Jul 27, 2:08 PM EDTSevere Thunderstorm WarningLWXKing George, Spotsylvania, Stafford, City of Fredericksburg67 min
Jul 27, 2:29 PM EDTSpecial Marine WarningLWX2 hr
Jul 27, 2:30 PM EDTSpecial Marine WarningLWX2 hr
Jul 27, 3:13 PM EDTSpecial Marine WarningLWX33 min
Jul 27, 3:13 PM EDTSpecial Marine WarningLWX32 min
Jul 27, 4:24 PM EDTSpecial Marine WarningLWX63 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2008Every severe thunderstorm warning in 2008

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.