Alert archive / West Virginia / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Baltimore/Washington

April 9, 2021Grant County, Hardy County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Apr 9, 2021, 3:27 PM EDT for Grant County, Hardy County, West Virginia. It was in force for 22 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 9, 2021, 3:27 PM EDT (19:27 UTC)
Expired
Apr 9, 2021, 3:49 PM EDT
In force
22 min
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Grant County, WV, Hardy County, WV

The radar

The Sterling radar (KLWX), 138 km from the middle of the area, began a volume at 19:31 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, 7.5 hours before the alert went out and 146 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 2021-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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 2021-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

523 
WUUS51 KLWX 091927
SVRLWX
WVC023-031-092000-
/O.NEW.KLWX.SV.W.0009.210409T1927Z-210409T2000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
327 PM EDT Fri Apr 9 2021

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  East central Grant County in eastern West Virginia...
  Northwestern Hardy County in eastern West Virginia...

* Until 400 PM EDT.

* At 327 PM EDT, a severe thunderstorm was located 8 miles north of
  Petersburg, moving east at 15 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...
  Lahmansville, Old Fields and Medley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3909 7916 3915 7916 3922 7894 3909 7893
TIME...MOT...LOC 1927Z 262DEG 13KT 3912 7913 

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

BJL
2 follow-up statements
271 
WWUS51 KLWX 091940
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
340 PM EDT Fri Apr 9 2021

WVC023-031-092000-
/O.CON.KLWX.SV.W.0009.000000T0000Z-210409T2000Z/
Grant WV-Hardy WV-
340 PM EDT Fri Apr 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR EAST CENTRAL GRANT AND NORTHWESTERN HARDY COUNTIES...

At 340 PM EDT, a severe thunderstorm was located near Moorefield,
moving east at 15 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...
Lahmansville and Old Fields. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3909 7911 3916 7909 3920 7894 3909 7893
TIME...MOT...LOC 1940Z 265DEG 13KT 3912 7907 

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

BJL
097 
WWUS51 KLWX 091949
SVSLWX

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
349 PM EDT Fri Apr 9 2021

WVC023-031-091959-
/O.CAN.KLWX.SV.W.0009.000000T0000Z-210409T2000Z/
Grant WV-Hardy WV-
349 PM EDT Fri Apr 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL GRANT AND
NORTHWESTERN HARDY COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3909 7911 3916 7909 3920 7894 3909 7893
TIME...MOT...LOC 1944Z 262DEG 13KT 3912 7903 

$$

BJL

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 3:05 PM EDTSevere Thunderstorm WarningLWXGrant40 min
Apr 9, 3:38 PM EDTSevere Thunderstorm WarningLWXGrant, Hardy34 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 2021Every severe thunderstorm warning in 2021

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.