Alert archive / West Virginia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 252, NWS Baltimore/Washington

September 5, 2017Berkeley County, Hampshire County, Morgan County, West Virginia; Frederick County, City of Winchester, Virginia; Washington County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Sep 5, 2017, 2:49 PM EDT for Berkeley County, Hampshire County, Morgan County, West Virginia; Frederick County, City of Winchester, Virginia; Washington County, Maryland. It was in force for 41 min. 17 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: Sep 5, 2017, 2:49 PM EDT (18:49 UTC)
Expired: Sep 5, 2017, 3:30 PM EDT
In force: 41 min
Issued by: NWS Baltimore/Washington
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Washington County, MD, City of Winchester, VA, Frederick County, VA, Berkeley County, WV, Hampshire County, WV, Morgan County, WV

The radar

The Sterling radar (KLWX), 72 km from the middle of the area, began a volume at 18:50 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

Time	Report	Where	Remark
Sep 5, 2:54 PM EDT	TSTM WND DMG	3 Sw Unger, VA	MULTIPLE TREES DOWN ON N TIMBER RIDGE RD JUST NORTH OF US 522
Sep 5, 2:54 PM EDT	TSTM WND DMG	3 W Unger, VA	TREES DOWN ALONG US 522 NEAR VA-WV LINE
Sep 5, 3:00 PM EDT	HAIL 1	1 Wsw Omps, WV
Sep 5, 3:02 PM EDT	TSTM WND DMG	1 Se Smith Crossroads, WV	A TREE WAS DOWN ALONG SPRIGGS ROAD NEAR FAIRBEE ROAD.
Sep 5, 3:02 PM EDT	TSTM WND DMG	2 Ssw Hancock, WV	A TREE WAS DOWN ALONG FAIRVIEW DRIVE.
Sep 5, 3:02 PM EDT	TSTM WND DMG	Stotlers Crossroads, WV	TREE DOWN ALONG WINCHESTER GRADE ROAD.
Sep 5, 3:04 PM EDT	TSTM WND DMG	3 E Smith Crossroads, WV	TREE WAS DOWN ALONG DUCKWALL ROAD.
Sep 5, 3:05 PM EDT	TSTM WND DMG	Glengary, WV	MULTIPLE TREES DOWN ALONG MCCUBBINS HOLLOW RD JUST S OF APPLE HARVEST RD
Sep 5, 3:06 PM EDT	TSTM WND DMG	2 Ne Glengary, WV	A DOZEN PINE TREES SNAPPED AND UPROOTED 200 BLK MONALISA LANE
Sep 5, 3:07 PM EDT	TSTM WND DMG	1 Ssw Shanghai, WV	SEVERAL LARGE TREES DOWN NEAR BACK CREEK VALLEY RD AND PALMER RD
Sep 5, 3:07 PM EDT	TSTM WND DMG	2 Nnw Gerrardstown, WV	MULTIPLE TREES DOWN ALONG BUCK HILL RD 200 YDS S OF ALLEGHENY WAY
Sep 5, 3:07 PM EDT	TSTM WND DMG	2 Nnw Gerrardstown, WV	6-8 TREES SNAPPED
Sep 5, 3:10 PM EDT	TSTM WND DMG	1 E Albin, VA	TREES DOWN ALONG APPLE PIE RIDGE RD NORTH OF US 522
Sep 5, 3:18 PM EDT	TSTM WND GST 67	1 N Martinsburg Arpt, WV
Sep 5, 3:20 PM EDT	TSTM WND DMG	Clear Spring, MD	A FEW TREES ALONG WITH WIRES AND POWER POLES WERE DOWN IN CLEAR SPRING.
Sep 5, 3:21 PM EDT	TSTM WND DMG	2 Wnw Conococheague, MD	FIVE POWER POLES WERE SNAPPED.
Sep 5, 3:25 PM EDT	TSTM WND DMG	3 Ese High View Manor, VA	TREES DOWN NEAR CEDAR CREEK GLADE

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.8 hours before the alert went out and 79 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: -324 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

136 
WUUS51 KLWX 051849
SVRLWX
MDC043-VAC069-840-WVC003-027-065-051930-
/O.NEW.KLWX.SV.W.0252.170905T1849Z-170905T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
249 PM EDT TUE SEP 5 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Washington County in north central Maryland...
  Frederick County in northwestern Virginia...
  The City of Winchester in northwestern Virginia...
  Morgan County in the Panhandle of West Virginia...
  Berkeley County in the Panhandle of West Virginia...
  East central Hampshire County in eastern West Virginia...

* Until 330 PM EDT

* At 248 PM EDT, severe thunderstorms were located along a line
  extending from near Barnes Gap to 10 miles southeast of Romney,
  moving southeast at 30 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...
  Winchester, Martinsburg, Hancock, Millwood Pike, Inwood,
  Wilson-Conococheague, Berkeley Springs, Berkeley, Falling Waters,
  Great Cacapon, Clear Spring, Capon Bridge, Hedgesville,
  Pecktonville, Big Spring, Big Pool, Johnsontown, Valley View,
  Ridgeway and Fishers Bridge.

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 3972 7780 3934 7798 3920 7807 3910 7811
      3922 7853 3972 7827
TIME...MOT...LOC 1848Z 294DEG 26KT 3971 7837 3926 7861 

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

JE

3 follow-up statements

044 
WWUS51 KLWX 051855
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
255 PM EDT TUE SEP 5 2017

MDC043-VAC069-840-WVC003-027-065-051930-
/O.CON.KLWX.SV.W.0252.000000T0000Z-170905T1930Z/
Washington MD-Frederick VA-City of Winchester VA-Morgan WV-
Berkeley WV-Hampshire WV-
255 PM EDT TUE SEP 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHWESTERN WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...
FREDERICK COUNTY IN NORTHWESTERN VIRGINIA...MORGAN...BERKELEY
COUNTIES IN THE PANHANDLE OF WEST VIRGINIA AND EAST CENTRAL HAMPSHIRE
COUNTIES IN EASTERN WEST VIRGINIA AND THE CITY OF WINCHESTER...

At 254 PM EDT, severe thunderstorms were located along a line
extending from near Barnes Gap to 10 miles southeast of Romney,
moving southeast at 30 mph.

HAZARD...70 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...
Winchester, Martinsburg, Hancock, Millwood Pike, Inwood,
Wilson-Conococheague, Berkeley Springs, Berkeley, Falling Waters,
Great Cacapon, Clear Spring, Capon Bridge, Hedgesville, Pecktonville,
Big Spring, Big Pool, Johnsontown, Valley View, Ridgeway and Fishers
Bridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3972 7780 3934 7798 3920 7807 3910 7811
      3922 7853 3972 7827
TIME...MOT...LOC 1854Z 294DEG 26KT 3970 7835 3925 7859 

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

JE

702 
WWUS51 KLWX 051910
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
310 PM EDT TUE SEP 5 2017

MDC043-VAC069-840-WVC003-027-065-051930-
/O.CON.KLWX.SV.W.0252.000000T0000Z-170905T1930Z/
Washington MD-Frederick VA-City of Winchester VA-Morgan WV-
Berkeley WV-Hampshire WV-
310 PM EDT TUE SEP 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTH CENTRAL WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...
FREDERICK COUNTY IN NORTHWESTERN VIRGINIA...MORGAN...BERKELEY
COUNTIES IN THE PANHANDLE OF WEST VIRGINIA AND EAST CENTRAL HAMPSHIRE
COUNTIES IN EASTERN WEST VIRGINIA AND THE CITY OF WINCHESTER...

At 310 PM EDT, severe thunderstorms were located along a line
extending from near Hancock to 9 miles northwest of Winchester,
moving east at 45 mph.

HAZARD...70 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...
Winchester, Martinsburg, Hancock, Millwood Pike, Inwood,
Wilson-Conococheague, Berkeley Springs, Berkeley, Falling Waters,
Clear Spring, Capon Bridge, Hedgesville, Pecktonville, Big Spring,
Big Pool, Johnsontown, Valley View, Ridgeway, Oakland and Cross
Junction.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3920 7847 3922 7853 3936 7846 3972 7817
      3972 7780 3934 7798 3920 7807 3910 7811
TIME...MOT...LOC 1910Z 276DEG 39KT 3971 7807 3926 7831 

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

JE

439 
WWUS51 KLWX 051922
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
322 PM EDT TUE SEP 5 2017

MDC043-VAC069-840-WVC003-027-065-051930-
/O.CON.KLWX.SV.W.0252.000000T0000Z-170905T1930Z/
Washington MD-Frederick VA-City of Winchester VA-Morgan WV-
Berkeley WV-Hampshire WV-
322 PM EDT TUE SEP 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTH CENTRAL WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...
CENTRAL FREDERICK COUNTY IN NORTHWESTERN VIRGINIA...EASTERN MORGAN...
BERKELEY COUNTIES IN THE PANHANDLE OF WEST VIRGINIA AND SOUTHEASTERN
HAMPSHIRE COUNTIES IN EASTERN WEST VIRGINIA AND THE CITY OF
WINCHESTER...

At 322 PM EDT, severe thunderstorms were located along a line
extending from 7 miles southwest of Claylick to near Winchester,
moving southeast at 30 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...
Winchester, Martinsburg, Millwood Pike, Inwood, Wilson-Conococheague,
Berkeley, Falling Waters, Clear Spring, Hedgesville, Pecktonville,
Big Spring, Big Pool, Tomahawk, High View, Johnsontown, Cedar Grove,
Clear Brook, Ridgeway, Bunker Hill and Stephenson.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

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.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3920 7847 3931 7829 3972 7805 3972 7780
      3934 7798 3920 7807 3910 7811
TIME...MOT...LOC 1922Z 294DEG 26KT 3968 7798 3923 7822 

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

JE

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 2:27 PM EDT	Severe Thunderstorm Warning	LWX	Hampshire	33 min
Sep 5, 2:38 PM EDT	Severe Thunderstorm Warning	LWX	Hampshire, Morgan	22 min
Sep 5, 2:43 PM EDT	Severe Thunderstorm Warning	LWX	Grant, Hampshire, Hardy, Pendleton	47 min
Sep 5, 3:06 PM EDT	Tornado Warning	LWX	Berkeley	24 min
Sep 5, 3:20 PM EDT	Severe Thunderstorm Warning	LWX	Berkeley, Jefferson	40 min
Sep 5, 3:31 PM EDT	Severe Thunderstorm Warning	LWX	Berkeley, Jefferson	44 min
Sep 5, 3:51 PM EDT	Severe Thunderstorm Warning	LWX	Jefferson	39 min
Sep 5, 4:16 PM EDT	Severe Thunderstorm Warning	LWX	Jefferson	29 min
Sep 5, 4:46 PM EDT	Severe Thunderstorm Warning	LWX	Jefferson	44 min
Sep 5, 3:36 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Augusta, Nelson, City of Charlottesville, City of Staunton, City of Waynesboro	39 min
Sep 5, 4:12 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, Culpeper, Greene, Madison, Nelson, Orange and 1 more	48 min
Sep 5, 4:54 PM EDT	Special Marine Warning	LWX		96 min
Sep 5, 5:24 PM EDT	Special Marine Warning	LWX		96 min
Sep 5, 5:34 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Fauquier, Loudoun, Warren	26 min
Sep 5, 6:03 PM EDT	Special Marine Warning	LWX		57 min
Sep 5, 7:07 PM EDT	Special Marine Warning	LWX		23 min
Sep 4, 8:07 PM EDT	Coastal Flood Advisory	LWX	Anne Arundel	9 hr

Nearby

Severe Thunderstorm Warnings in West Virginia, 2017 Severe Thunderstorm Warnings in Virginia, 2017 Severe Thunderstorm Warnings in Maryland, 2017 Every severe thunderstorm warning in 2017

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.