Alert archive / Virginia / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 45, NWS Baltimore/Washington

June 2, 20095 counties in Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 2, 2009, 4:03 PM EDT for 5 counties in Virginia. It was in force for 42 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
Jun 2, 2009, 4:03 PM EDT (20:03 UTC)
Expired
Jun 2, 2009, 4:45 PM EDT
In force
42 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Culpeper County, VA, Fauquier County, VA, Orange County, VA, Spotsylvania County, VA, Stafford County, VA

The radar

The Sterling radar (KLWX), 67 km from the middle of the area, began a volume at 20:03 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
Jun 2, 1:58 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.1 hours before the alert went out and 187 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, Phillips Aaf/Abe, MD at 12:00Z on 2009-06-02Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2009-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1348 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 2, 2:19 PM EDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jun 2, 2:19 PM EDT, 1 hour 44 minutes before
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Hazardous weather outlook, Jun 2, 2:15 PM EDT, 1 hour 48 minutes before
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In the hours before

Special weather statement, Jun 2, 3:37 PM EDT, 26 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
337 PM EDT TUE JUN 2 2009

VAZ039-040-050-051-022030-
ORANGE VA-MADISON VA-CULPEPER VA-RAPPAHANNOCK VA-
337 PM EDT TUE JUN 2 2009

...STRONG THUNDERSTORMS TO AFFECT ORANGE...MADISON...CULPEPER AND
RAPPAHANNOCK COUNTIES...

AT 337 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES
SOUTHEAST OF REVA...MOVING SOUTHEAST AT 20 MPH.  LOCATIONS THAT WILL
LIKELY BE AFFECTED BY THIS STORM INCLUDE CULPEPER. WIND GUSTS OF 40
TO 50 MPH CAN BE EXPECTED WITH THIS STORM...ALONG WITH FREQUENT
CLOUD-TO-GROUND LIGHTNING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 2, 4:04 AM EDTSmall Craft AdvisoryLWX35 hr
Jun 2, 4:01 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange30 min
Jun 2, 4:24 PM EDTSevere Thunderstorm WarningLWXFauquier, Prince William, Stafford51 min
Jun 2, 4:26 PM EDTSevere Thunderstorm WarningLWXCulpeper, Orange, Spotsylvania49 min
Jun 2, 4:31 PM EDTSpecial Marine WarningLWX89 min
Jun 2, 4:40 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Orange, Prince William, Spotsylvania, Stafford and 1 more50 min
Jun 2, 5:03 PM EDTSpecial Marine WarningLWX42 min
Jun 2, 5:04 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania56 min
Jun 2, 5:30 PM EDTSevere Thunderstorm WarningLWXKing George, Spotsylvania, Stafford, City of Fredericksburg56 min
Jun 2, 5:39 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania66 min
Jun 2, 5:41 PM EDTFlash Flood WarningLWXOrange, Spotsylvania2 hr
Jun 2, 5:47 PM EDTSpecial Marine WarningLWX118 min
Jun 2, 5:59 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania, Stafford, City of Fredericksburg52 min
Jun 2, 6:10 PM EDTSpecial Marine WarningLWX108 min
Jun 2, 6:23 PM EDTSpecial Marine WarningLWX62 min
Jun 2, 7:23 PM EDTSevere Thunderstorm WarningLWXKing George31 min
Jun 2, 7:45 PM EDTSpecial Marine WarningLWX35 min
Jun 2, 4:59 PM EDTSevere Thunderstorm WarningLWXCharles51 min
Jun 2, 6:08 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's67 min
Jun 2, 7:00 PM EDTSevere Thunderstorm WarningLWXSaint Mary's30 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2009Every severe thunderstorm warning in 2009

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.