Alert archive / Virginia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Baltimore/Washington

May 10, 20188 counties in Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 10, 2018, 6:24 PM EDT for 8 counties in Virginia. It was in force for 53 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
May 10, 2018, 6:24 PM EDT (22:24 UTC)
Expired
May 10, 2018, 7:17 PM EDT
In force
53 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties City of Fredericksburg, VA, Culpeper County, VA, Fauquier County, VA, Orange County, VA, Prince William County, VA, Rappahannock County, VA, Spotsylvania County, VA, Stafford County, VA

The radar

The Sterling radar (KLWX), 63 km from the middle of the area, began a volume at 22:23 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.

What was reported inside it

TimeReportWhereRemark
May 10, 6:29 PM EDTTSTM WND DMG2 Se Opal, VATREE DOWN BLOCKING ROADWAY IN THE 10400 BLOCK OF OLD MARSH ROAD.
May 10, 6:40 PM EDTMARINE TSTM WIND 431 Se Midland, VA
May 10, 6:45 PM EDTTSTM WND GST 641 Se Midland, VA
May 10, 6:45 PM EDTNON-TSTM WND GST 641 Se Midland, VA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
May 10, 1:14 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.4 hours before the alert went out and 62 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 2018-05-10Temperature 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, Washington/Dulle, VA at 12:00Z on 2018-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 206 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
1336 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
206 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

443 
WUUS51 KLWX 102224
SVRLWX
VAC047-061-137-153-157-177-179-630-102330-
/O.NEW.KLWX.SV.W.0021.180510T2224Z-180510T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
624 PM EDT THU MAY 10 2018

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Stafford County in northern Virginia...
  Northeastern Orange County in central Virginia...
  The City of Fredericksburg in central Virginia...
  Southeastern Fauquier County in northern Virginia...
  Southern Rappahannock County in northwestern Virginia...
  Culpeper County in northern Virginia...
  Southern Prince William County in northern Virginia...
  Northeastern Spotsylvania County in central Virginia...

* Until 730 PM EDT.

* At 623 PM EDT, severe thunderstorms were located along a line
  extending from near Warrenton to 9 miles west of Bealeton to 7
  miles northwest of Culpeper, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Damaging winds will cause some trees and large branches 
           to fall. This could injure those outdoors, as well as 
           damage homes and vehicles. Roadways may become blocked by 
           downed trees. Localized power outages are possible. 
           Unsecured light objects may become projectiles.

* Locations impacted include...
  Stafford, Fredericksburg, Culpeper, Warrenton, Quantico, Aquia
  Creek, Potomac Creek, Triangle, Dumfries, Bealeton, Massaponax,
  Spotsylvania, Cherry Hill, Falmouth, Opal, Remington, Catlett,
  Calverton, Midland and Brandy Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.

&&

LAT...LON 3848 7817 3852 7821 3860 7799 3877 7788
      3855 7724 3849 7727 3844 7726 3835 7727
      3834 7728 3834 7732 3830 7734 3826 7735
      3825 7733 3824 7737 3812 7751
TIME...MOT...LOC 2223Z 296DEG 32KT 3874 7788 3860 7796 3853 7812 

HAIL...<.75IN
WIND...60MPH
 
$$

BJL
5 follow-up statements
451 
WWUS51 KLWX 102235
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
635 PM EDT THU MAY 10 2018

VAC157-102244-
/O.CAN.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Rappahannock VA-
635 PM EDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN RAPPAHANNOCK COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southern Maryland...and northern and central Virginia.

LAT...LON 3832 7788 3850 7813 3858 7791 3874 7779
      3855 7724 3849 7727 3842 7726 3836 7727
      3834 7728 3834 7731 3833 7733 3826 7735
      3825 7733 3824 7737 3812 7751
TIME...MOT...LOC 2234Z 295DEG 34KT 3869 7774 3855 7782 3850 7799 

$$

VAC047-061-137-153-177-179-630-102330-
/O.CON.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Stafford VA-Orange VA-City of Fredericksburg VA-Fauquier VA-
Culpeper VA-Prince William VA-Spotsylvania VA-
635 PM EDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR STAFFORD...NORTHEASTERN ORANGE...SOUTHEASTERN FAUQUIER...CENTRAL
CULPEPER...SOUTHERN PRINCE WILLIAM AND NORTHEASTERN SPOTSYLVANIA
COUNTIES AND THE CITY OF FREDERICKSBURG...

At 634 PM EDT, severe thunderstorms were located along a line
extending from near Warrenton to near Bealeton to near Culpeper,
moving southeast at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Stafford, Fredericksburg, Culpeper, Warrenton, Quantico, Aquia Creek,
Potomac Creek, Triangle, Dumfries, Bealeton, Massaponax,
Spotsylvania, Cherry Hill, Falmouth, Opal, Remington, Catlett,
Calverton, Midland and Brandy Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.

&&

LAT...LON 3832 7788 3850 7813 3858 7791 3874 7779
      3855 7724 3849 7727 3842 7726 3836 7727
      3834 7728 3834 7731 3833 7733 3826 7735
      3825 7733 3824 7737 3812 7751
TIME...MOT...LOC 2234Z 295DEG 34KT 3869 7774 3855 7782 3850 7799 

HAIL...1.00IN
WIND...60MPH
 
$$

BJL
166 
WWUS51 KLWX 102247
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
647 PM EDT THU MAY 10 2018

VAC047-061-137-153-177-179-630-102330-
/O.CON.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Stafford VA-Orange VA-City of Fredericksburg VA-Fauquier VA-
Culpeper VA-Prince William VA-Spotsylvania VA-
647 PM EDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR STAFFORD...NORTHEASTERN ORANGE...SOUTHEASTERN FAUQUIER...
SOUTHEASTERN CULPEPER...SOUTHERN PRINCE WILLIAM AND NORTHEASTERN
SPOTSYLVANIA COUNTIES AND THE CITY OF FREDERICKSBURG...

At 646 PM EDT, severe thunderstorms were located along a line
extending from 7 miles southwest of Linton Hall to near Bealeton to
near Culpeper, moving southeast at 35 mph.

HAZARD...70 mph wind gusts and quarter size hail. A Wind Gust of 64 
         mph was reported at the Warrenton airport at 6:45 PM EDT. 

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Stafford, Fredericksburg, Culpeper, Quantico, Aquia Creek, Potomac
Creek, Triangle, Dumfries, Bealeton, Massaponax, Spotsylvania, Cherry
Hill, Falmouth, Remington, Catlett, Calverton, Midland, Brandy
Station, Locust Grove and Ramoth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.

&&

LAT...LON 3832 7788 3846 7807 3847 7805 3855 7778
      3870 7768 3855 7724 3849 7727 3842 7726
      3836 7727 3834 7728 3834 7731 3833 7733
      3826 7735 3825 7733 3824 7737 3812 7751
TIME...MOT...LOC 2246Z 296DEG 32KT 3866 7765 3852 7773 3847 7790 

HAIL...1.00IN
WIND...70MPH
 
$$

BJL
299 
WWUS51 KLWX 102256
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
656 PM EDT THU MAY 10 2018

VAC047-137-630-102306-
/O.CAN.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Orange VA-City of Fredericksburg VA-Culpeper VA-
656 PM EDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ORANGE AND
SOUTHEASTERN CULPEPER COUNTIES AND THE CITY OF FREDERICKSBURG IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 700 PM EDT for
southern Maryland...and northern and central Virginia.

LAT...LON 3830 7745 3832 7747 3832 7748 3849 7773
      3864 7759 3855 7724 3849 7727 3842 7726
      3835 7727 3834 7728 3834 7731 3833 7733
      3824 7737
TIME...MOT...LOC 2256Z 296DEG 32KT 3864 7759 3850 7767 3845 7784 

$$

VAC061-153-177-179-102330-
/O.CON.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Stafford VA-Fauquier VA-Prince William VA-Spotsylvania VA-
656 PM EDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR STAFFORD...SOUTHEASTERN FAUQUIER...SOUTHEASTERN PRINCE WILLIAM
AND NORTHEASTERN SPOTSYLVANIA COUNTIES...

At 656 PM EDT, severe thunderstorms were located along a line
extending from 8 miles south of Linton Hall to 8 miles southeast of
Bealeton to 9 miles east of Culpeper, moving southeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Stafford, Quantico, Potomac Creek, Aquia Creek, Triangle, Dumfries,
Cherry Hill, Falmouth, Stones Corner, Roseville, Garrisonville,
Ramoth, Heflin, White Oak, Morrisville, Ruby, Somerville, Goldvein,
Leeland and Widewater.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.

&&

LAT...LON 3830 7745 3832 7747 3832 7748 3849 7773
      3864 7759 3855 7724 3849 7727 3842 7726
      3835 7727 3834 7728 3834 7731 3833 7733
      3824 7737
TIME...MOT...LOC 2256Z 296DEG 32KT 3864 7759 3850 7767 3845 7784 

HAIL...<.75IN
WIND...60MPH
 
$$

DHOF
181 
WWUS51 KLWX 102303
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
703 PM EDT THU MAY 10 2018

VAC061-153-102313-
/O.CAN.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Fauquier VA-Prince William VA-
703 PM EDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FAUQUIER AND
SOUTHEASTERN PRINCE WILLIAM COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern Maryland...and northern and central Virginia.

LAT...LON 3842 7763 3847 7763 3859 7749 3858 7745
      3852 7737 3852 7734 3850 7731 3851 7729
      3850 7727 3835 7727 3834 7728 3834 7731
      3833 7733 3824 7737
TIME...MOT...LOC 2303Z 296DEG 32KT 3862 7753 3848 7761 3843 7778 

$$

VAC177-179-102330-
/O.CON.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Stafford VA-Spotsylvania VA-
703 PM EDT THU MAY 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR STAFFORD AND NORTHEASTERN SPOTSYLVANIA COUNTIES...

At 703 PM EDT, severe thunderstorms were located along a line
extending from 9 miles south of Linton Hall to 12 miles west of
Stafford to 10 miles south of Bealeton, moving southeast at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Damaging winds will cause some trees and large branches to 
         fall. This could injure those outdoors, as well as damage 
         homes and vehicles. Roadways may become blocked by downed 
         trees. Localized power outages are possible. Unsecured 
         light objects may become projectiles.

Locations impacted include...
Stafford, Fredericksburg, Potomac Creek, Aquia Creek, Falmouth,
Stones Corner, Leeland, Widewater, Roseville, Garrisonville,
Arkendale, Spring Valley, Brooke, Ramoth, Heflin, Aquia, Storck,
White Oak, Glendie and Hartwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors to protect yourself from wind and lightning. Trees around
you may be downed from damaging winds, so if you are near large
trees, move to an interior room on the lowest floor. Don't drive
underneath trees or in wooded areas until the threat has passed.

&&

LAT...LON 3842 7763 3847 7763 3859 7749 3858 7745
      3852 7737 3852 7734 3850 7731 3851 7729
      3850 7727 3835 7727 3834 7728 3834 7731
      3833 7733 3824 7737
TIME...MOT...LOC 2303Z 296DEG 32KT 3862 7753 3848 7761 3843 7778 

HAIL...<.75IN
WIND...60MPH
 
$$

DHOF
813 
WWUS51 KLWX 102317
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
717 PM EDT THU MAY 10 2018

VAC177-179-102326-
/O.CAN.KLWX.SV.W.0021.000000T0000Z-180510T2330Z/
Stafford VA-Spotsylvania VA-
717 PM EDT THU MAY 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR STAFFORD AND NORTHEASTERN
SPOTSYLVANIA COUNTIES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
southern Maryland...and northern and central Virginia.

LAT...LON 3842 7763 3847 7763 3859 7749 3858 7745
      3852 7737 3852 7734 3850 7731 3851 7729
      3850 7727 3835 7727 3834 7728 3834 7731
      3833 7733 3824 7737
TIME...MOT...LOC 2316Z 296DEG 32KT 3857 7740 3843 7748 3838 7765 

$$

BJL

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 4:35 AM EDTSmall Craft AdvisoryLWX19 hr
May 10, 1:19 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Augusta, Nelson, City of Staunton, City of Waynesboro41 min
May 10, 2:01 PM EDTSevere Thunderstorm WarningLWXAugusta, Nelson44 min
May 10, 2:07 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson, City of Charlottesville38 min
May 10, 2:33 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Rappahannock, Warren42 min
May 10, 2:35 PM EDTSevere Thunderstorm WarningLWXAlbemarle, Nelson40 min
May 10, 3:53 PM EDTSevere Thunderstorm WarningLWXLoudoun37 min
May 10, 3:58 PM EDTSevere Thunderstorm WarningLWXClarke, Loudoun33 min
May 10, 4:10 PM EDTSevere Thunderstorm WarningLWXLoudoun28 min
May 10, 4:38 PM EDTSpecial Marine WarningLWX97 min
May 10, 5:26 PM EDTSevere Thunderstorm WarningLWXWarren27 min
May 10, 5:48 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Prince William, Rappahannock42 min
May 10, 5:59 PM EDTSpecial Marine WarningLWX65 min
May 10, 6:08 PM EDTSpecial Marine WarningLWX49 min
May 10, 6:16 PM EDTSpecial Marine WarningLWX119 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2018Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.