Alert archive / Virginia / Tornado Warnings in 2010

Tornado Warning 28, NWS Baltimore/Washington

October 27, 2010King George County, Spotsylvania County, Virginia

NWS Baltimore/Washington issued this tornado warning at Oct 27, 2010, 7:05 PM EDT for King George County, Spotsylvania County, Virginia. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 27, 2010, 7:05 PM EDT (23:05 UTC)
Expired
Oct 27, 2010, 7:45 PM EDT
In force
40 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties King George County, VA, Spotsylvania County, VA

The radar

The Sterling radar (KLWX), 83 km from the middle of the area, began a volume at 23:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 27, 12:13 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.1 hours before the alert went out and 80 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 2010-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 402 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 2010-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 226 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
402 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
591 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
226 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.8

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 27, 12:48 AM EDTSpecial Weather StatementLWXGreene27 min
Oct 27, 1:30 AM EDTSpecial Weather StatementLWXPage30 min
Oct 27, 5:12 AM EDTSpecial Weather StatementLWXCulpeper48 min
Oct 27, 12:16 PM EDTSpecial Marine WarningLWX59 min
Oct 27, 12:24 PM EDTSpecial Weather StatementLWXArlington, City of Alexandria, City of Falls Church36 min
Oct 27, 12:57 PM EDTSpecial Weather StatementLWXStafford, City of Fredericksburg63 min
Oct 27, 1:08 PM EDTSpecial Marine WarningLWX112 min
Oct 27, 1:12 PM EDTSpecial Marine WarningLWX93 min
Oct 27, 1:17 PM EDTFlash Flood WarningLWXArlington, Fairfax, City of Alexandria, City of Falls Church82 min
Oct 27, 1:47 PM EDTSpecial Marine WarningLWX118 min
Oct 27, 2:45 PM EDTSpecial Marine WarningLWX44 min
Oct 27, 3:06 PM EDTSmall Craft AdvisoryLWX63 hr
Oct 27, 3:24 PM EDTSpecial Marine WarningLWX28 min
Oct 27, 4:25 PM EDTSpecial Weather StatementLWXSpotsylvania, City of Fredericksburg35 min
Oct 27, 4:37 PM EDTTornado WarningLWXSpotsylvania, Stafford, City of Fredericksburg23 min
Oct 27, 4:38 PM EDTSpecial Marine WarningLWX86 min
Oct 27, 4:38 PM EDTTornado WarningLWXKing George36 min
Oct 27, 5:35 PM EDTSpecial Marine WarningLWX60 min
Oct 27, 5:52 PM EDTSpecial Marine WarningLWX113 min
Oct 27, 6:48 PM EDTSpecial Weather StatementLWXKing George, City of Fredericksburg27 min
Oct 27, 7:12 PM EDTSpecial Marine WarningLWX51 min
Oct 27, 1:25 PM EDTSevere Thunderstorm WarningLWXCharles, Prince George's50 min
Oct 27, 2:04 PM EDTSpecial Weather StatementLWXCalvert41 min
Oct 27, 2:38 PM EDTSpecial Weather StatementLWXCharles52 min
Oct 27, 2:56 PM EDTSpecial Weather StatementLWXCalvert34 min
Oct 27, 5:21 PM EDTTornado WarningLWXCharles, Saint Mary's39 min
Oct 27, 5:43 PM EDTSpecial Weather StatementLWXCharles47 min
Oct 27, 6:10 PM EDTSpecial Weather StatementLWXSaint Mary's5 min
Oct 27, 6:12 PM EDTSpecial Weather StatementLWXSaint Mary's3 min
Oct 27, 7:36 PM EDTTornado WarningLWXCharles, Saint Mary's42 min
Oct 26, 8:20 PM EDTSpecial Weather StatementLWXPendleton40 min
Oct 27, 12:23 AM EDTSpecial Weather StatementLWXJefferson37 min

Nearby

Tornado Warnings in Virginia, 2010Every tornado warning in 2010Tornadoes in 2010

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.