Alert archive / Virginia / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 92, NWS Baltimore/Washington

June 24, 2013Clarke County, Frederick County, Loudoun County, Virginia; Jefferson County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 24, 2013, 3:25 PM EDT for Clarke County, Frederick County, Loudoun County, Virginia; Jefferson County, West Virginia. It was in force for 50 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 24, 2013, 3:25 PM EDT (19:25 UTC)
Expired
Jun 24, 2013, 4:15 PM EDT
In force
50 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Clarke County, VA, Frederick County, VA, Loudoun County, VA, Jefferson County, WV

The radar

The Sterling radar (KLWX), 45 km from the middle of the area, began a volume at 19:25 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 24, 2:44 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.4 hours before the alert went out and 162 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 2013-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 705 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, Phillips Aaf/Abe, MD at 12:00Z on 2013-06-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
705 J/kg
Mixed-layer CIN
-105 J/kg
Mixed-layer LCL
1279 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 24, 2:56 PM EDT, 29 minutes earlier.

Area forecast discussion, Jun 24, 2:56 PM EDT, 29 minutes before
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Hazardous weather outlook, Jun 24, 3:07 PM EDT, 18 minutes before
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In the hours before

Local storm report, Jun 24, 10:40 AM EDT, 4 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1040 AM EDT MON JUN 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0909 PM     TSTM WND DMG     4 SW FRANKLIN           38.60N  79.37W
06/23/2013                   PENDLETON          WV   911 CALL CENTER

            SMALL TREE ACROSS ONE LANE OF PETERSBURG PIKE ABOUT 3
            TO 4 MILES SOUTH OF FRANKLIN

&&

EVENT NUMBER LWX1300479

KLW
Local storm report, Jun 24, 11:07 AM EDT, 4 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1107 AM EDT MON JUN 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0910 PM     HAIL             FRANKLIN                38.65N  79.33W
06/23/2013  E0.75 INCH       PENDLETON          WV   TRAINED SPOTTER

            DIME SIZE HAIL

&&

EVENT NUMBER LWX1300480

KLW
Local storm report, Jun 24, 1:10 PM EDT, 2 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
110 PM EDT MON JUN 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1254 PM     HAIL             1 ENE SPRING GAP        39.57N  78.70W
06/24/2013  E1.25 INCH       ALLEGANY           MD   TRAINED SPOTTER

            HALF DOLLAR SIZE HAIL

&&

EVENT NUMBER LWX1300481

KLW
Local storm report, Jun 24, 1:49 PM EDT, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
149 PM EDT MON JUN 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0123 PM     TSTM WND DMG     3 W PLEASANT VALLEY     39.71N  78.69W
06/24/2013                   ALLEGANY           MD   PUBLIC

            FEW TREE BRANCHES ABOUT ONE TO ONE AND A HALF INCHES IN
            DIAMETER DOWN

&&

EVENT NUMBER LWX1300482

KLW
Local storm report, Jun 24, 2:15 PM EDT, 1 hour 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
215 PM EDT MON JUN 24 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0140 PM     TSTM WND DMG     1 NE SPRING GAP         39.58N  78.70W
06/24/2013                   ALLEGANY           MD   TRAINED SPOTTER

            FEW LARGE TREES ABOUT 12 TO 14 INCHES IN DIAMETER
            BROUGHT DOWN POWER LINES NEAR RECKLEY SPRING LN SE AND
            BRICE HOLLOW RD SE

&&

EVENT NUMBER LWX1300483

KLW

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 8:13 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham47 min
Jun 23, 8:29 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham, City of Harrisonburg46 min
Jun 24, 1:24 PM EDTSevere Thunderstorm WarningLWXAugusta, Rockingham, City of Harrisonburg51 min
Jun 24, 3:06 PM EDTSevere Thunderstorm WarningLWXLoudoun39 min
Jun 24, 3:10 PM EDTSevere Thunderstorm WarningLWXFairfax, Loudoun50 min
Jun 24, 3:40 PM EDTSpecial Marine WarningLWX2 hr
Jun 24, 3:51 PM EDTSevere Thunderstorm WarningLWXLoudoun39 min
Jun 24, 4:06 PM EDTSevere Thunderstorm WarningLWXPrince William, Stafford39 min
Jun 24, 4:57 PM EDTSpecial Marine WarningLWX2 hr
Jun 24, 5:24 PM EDTSpecial Marine WarningLWX2 hr
Jun 24, 5:55 PM EDTSpecial Marine WarningLWX65 min
Jun 24, 6:01 PM EDTSpecial Marine WarningLWX119 min
Jun 24, 12:54 PM EDTSevere Thunderstorm WarningLWXAllegany51 min
Jun 24, 1:19 PM EDTSevere Thunderstorm WarningLWXAllegany, Washington56 min
Jun 24, 4:27 PM EDTSevere Thunderstorm WarningLWXCharles, Prince George's48 min
Jun 24, 6:08 PM EDTSevere Thunderstorm WarningLWXSaint Mary's37 min
Jun 23, 8:41 PM EDTSevere Thunderstorm WarningLWXPendleton49 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2013Severe Thunderstorm Warnings in West Virginia, 2013Every severe thunderstorm warning in 2013

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.