Alert archive / Virginia / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 121, NWS Baltimore/Washington

July 3, 2014Greene County, Madison County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 3, 2014, 12:50 PM EDT for Greene County, Madison 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
Jul 3, 2014, 12:50 PM EDT (16:50 UTC)
Expired
Jul 3, 2014, 1:30 PM EDT
In force
40 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon

Counties Greene County, VA, Madison County, VA

The radar

The Sterling radar (KLWX), 103 km from the middle of the area, began a volume at 16:53 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, 4.8 hours before the alert went out and 107 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 2014-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 2014-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
4 J/kg
Mixed-layer CIN
-174 J/kg
Mixed-layer LCL
1408 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
113 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 Jul 3, 10:01 AM EDT, 2 hours 49 minutes earlier.

Area forecast discussion, Jul 3, 10:01 AM EDT, 2 hours 49 minutes before
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Hazardous weather outlook, Jul 3, 7:54 AM EDT, 4 hours 56 minutes before
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In the hours before

Special weather statement, Jul 3, 12:14 PM EDT, 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1214 PM EDT THU JUL 3 2014

WVZ055-502-506-031645-
EASTERN PENDLETON WV-HARDY WV-EASTERN GRANT WV-
1214 PM EDT THU JUL 3 2014

...STRONG THUNDERSTORM TO AFFECT EASTERN PENDLETON...HARDY AND
EASTERN GRANT COUNTIES...

AT 1214 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 13 MILES SOUTHEAST
OF MILAM...STATIONARY.

LOCATIONS IMPACTED INCLUDE.

STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP
RAPIDLY. REMAIN ALERT...AND BE PREPARED TO TAKE ACTION IF WARNINGS
ARE ISSUED.

WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL CAN BE EXPECTED WITH THIS
STORM.

&&

LAT...LON 3898 7910 3891 7896 3865 7917 3876 7928
TIME...MOT...LOC 1614Z 180DEG 0KT 3865 7897

MANNING

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 2, 8:06 PM EDTFlash Flood WarningLWXGreene, Madison, Page3 hr
Jul 2, 8:27 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville30 min
Jul 2, 8:35 PM EDTSevere Thunderstorm WarningLWXGreene, Madison, Orange40 min
Jul 2, 8:51 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange39 min
Jul 2, 9:19 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania41 min
Jul 2, 9:37 PM EDTSpecial Marine WarningLWX83 min
Jul 2, 10:27 PM EDTSpecial Marine WarningLWX93 min
Jul 2, 10:28 PM EDTSpecial Marine WarningLWX92 min
Jul 2, 10:40 PM EDTSpecial Marine WarningLWX95 min
Jul 2, 10:45 PM EDTSpecial Marine WarningLWX90 min
Jul 2, 11:07 PM EDTSpecial Marine WarningLWX83 min
Jul 2, 11:11 PM EDTSpecial Marine WarningLWX94 min
Jul 2, 11:19 PM EDTSpecial Marine WarningLWX116 min
Jul 3, 12:14 AM EDTSpecial Marine WarningLWX91 min
Jul 3, 12:17 AM EDTSpecial Marine WarningLWX88 min
Jul 3, 12:31 AM EDTSevere Thunderstorm WarningLWXKing George44 min
Jul 3, 12:40 AM EDTSpecial Marine WarningLWX65 min
Jul 3, 3:49 AM EDTFlash Flood WatchLWXArlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more26 hr
Jul 3, 4:31 AM EDTSmall Craft AdvisoryLWX40 hr
Jul 3, 12:29 PM EDTSevere Thunderstorm WarningLWXRockingham, Shenandoah46 min
Jul 3, 1:03 PM EDTFlash Flood WarningLWXRockingham6 hr
Jul 3, 1:14 PM EDTSevere Thunderstorm WarningLWXShenandoah46 min
Jul 3, 1:53 PM EDTSevere Thunderstorm WarningLWXFrederick, Shenandoah, Warren52 min
Jul 3, 2:10 PM EDTSevere Thunderstorm WarningLWXPage, Shenandoah, Warren32 min
Jul 3, 2:10 PM EDTSevere Thunderstorm WarningLWXCulpeper50 min
Jul 3, 2:20 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick, Warren, City of Winchester40 min
Jul 3, 2:47 PM EDTFlash Flood WarningLWXAlbemarle, Augusta, Greene, Nelson, Rockingham, City of Waynesboro4 hr
Jul 3, 2:54 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier51 min
Jul 3, 3:01 PM EDTSevere Thunderstorm WarningLWXClarke, Loudoun44 min
Jul 3, 3:21 PM EDTSevere Thunderstorm WarningLWXFairfax, Fauquier, Loudoun, Prince William, City of Manassas, City of Manassas Park39 min
Jul 3, 3:29 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville34 min
Jul 3, 3:43 PM EDTSevere Thunderstorm WarningLWXCulpeper, Madison, Orange, Rappahannock, Stafford47 min
Jul 3, 3:50 PM EDTSevere Thunderstorm WarningLWXArlington, Fairfax, Loudoun, City of Alexandria, City of Fairfax, City of Falls Church55 min
Jul 3, 3:52 PM EDTSpecial Marine WarningLWX83 min
Jul 3, 4:08 PM EDTSevere Thunderstorm WarningLWXFairfax, Fauquier, Prince William, Stafford25 min
Jul 3, 4:26 PM EDTSevere Thunderstorm WarningLWXRockingham49 min
Jul 3, 4:30 PM EDTSevere Thunderstorm WarningLWXArlington60 min
Jul 3, 4:38 PM EDTSpecial Marine WarningLWX82 min
Jul 3, 4:46 PM EDTSpecial Marine WarningLWX89 min
Jul 3, 4:53 PM EDTSevere Thunderstorm WarningLWXRockingham27 min
Jul 3, 5:16 PM EDTSevere Thunderstorm WarningLWXKing George44 min
Jul 3, 5:41 PM EDTSpecial Marine WarningLWX94 min
Jul 3, 6:27 PM EDTSpecial Marine WarningLWX93 min
Jul 3, 6:42 PM EDTAreal Flood WarningLWXRockingham6 hr
Jul 3, 3:25 PM EDTSevere Thunderstorm WarningLWXCarroll, Frederick, Howard, Montgomery50 min
Jul 3, 4:04 PM EDTSevere Thunderstorm WarningLWXBaltimore, Carroll56 min
Jul 3, 5:03 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Baltimore, Howard, City of Baltimore42 min
Jul 3, 5:24 PM EDTSevere Thunderstorm WarningLWXBaltimore, Harford51 min
Jul 3, 5:55 PM EDTFlash Flood WarningLWXBaltimore, Harford3 hr
Jul 3, 6:07 PM EDTSevere Thunderstorm WarningLWXHarford38 min
Jul 3, 11:27 AM EDTSevere Thunderstorm WarningLWXPendleton48 min
Jul 3, 12:14 PM EDTSpecial Weather StatementLWXPendleton31 min
Jul 3, 3:57 PM EDTSevere Thunderstorm WarningLWXGrant, Hardy, Pendleton48 min
Jul 3, 4:04 PM EDTFlash Flood WarningLWXGrant, Hardy, Pendleton6 hr
Jul 3, 5:03 PM EDTSevere Thunderstorm WarningLWXGrant, Hampshire, Hardy, Mineral19 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2014Every severe thunderstorm warning in 2014

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.