Alert archive / West Virginia / Severe Thunderstorm Watches in 2021

Severe Thunderstorm Watch 272

June 14, 202117 counties in West Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 14, 2021, 4:52 PM EDT for 17 counties in West Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 14, 2021, 4:52 PM EDT (20:52 UTC)
Expired
Jun 14, 2021, 10:28 PM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt

Counties Barbour County, WV, Doddridge County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Pleasants County, WV, Preston County, WV, Randolph County, WV, Ritchie County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 154 km from the middle of the area, began a volume at 20:54 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 14, 5:18 PM EDTSevere Thunderstorm WarningPBZMonongalia, Preston27 min
Jun 14, 5:41 PM EDTSevere Thunderstorm WarningPBZMonongalia, Preston31 min
Jun 14, 5:45 PM EDTSevere Thunderstorm WarningPBZMarshall, Wetzel30 min
Jun 14, 5:47 PM EDTSevere Thunderstorm WarningPBZMarshall, Wetzel16 min
Jun 14, 6:02 PM EDTSevere Thunderstorm WarningPBZMarion, Monongalia28 min
Jun 14, 6:14 PM EDTSevere Thunderstorm WarningRLXDoddridge, Pleasants, Ritchie, Tyler46 min
Jun 14, 6:16 PM EDTSevere Thunderstorm WarningPBZWetzel29 min
Jun 14, 6:27 PM EDTSevere Thunderstorm WarningPBZMarion, Monongalia, Preston33 min
Jun 14, 6:39 PM EDTSevere Thunderstorm WarningPBZMarion, Wetzel22 min
Jun 14, 6:39 PM EDTSevere Thunderstorm WarningRLXDoddridge, Harrison, Taylor, Tyler36 min
Jun 14, 6:51 PM EDTSevere Thunderstorm WarningPBZMarion, Monongalia, Preston, Tucker39 min
Jun 14, 6:54 PM EDTSevere Thunderstorm WarningRLXBarbour, Taylor36 min
Jun 14, 6:57 PM EDTSevere Thunderstorm WarningRLXDoddridge, Harrison, Lewis, Pleasants, Ritchie, Tyler48 min
Jun 14, 7:00 PM EDTFlash Flood WarningPBZMarion72 min
Jun 14, 7:10 PM EDTSevere Thunderstorm WarningRLXBarbour, Harrison, Taylor34 min
Jun 14, 7:27 PM EDTSevere Thunderstorm WarningPBZPreston, Tucker33 min
Jun 14, 7:34 PM EDTSevere Thunderstorm WarningRLXBraxton, Calhoun, Gilmer, Lewis, Ritchie41 min
Jun 14, 7:41 PM EDTSevere Thunderstorm WarningRLXDoddridge, Harrison, Lewis, Upshur34 min
Jun 14, 7:43 PM EDTSevere Thunderstorm WarningRLXBarbour, Randolph, Taylor32 min
Jun 14, 7:58 PM EDTSevere Thunderstorm WarningPBZTucker32 min
Jun 14, 8:16 PM EDTSevere Thunderstorm WarningRLXBarbour, Lewis, Randolph, Upshur29 min
Jun 14, 8:32 PM EDTFlash Flood WarningRLXDoddridge, Gilmer, Harrison, Lewis, Upshur3 hr
Jun 14, 8:42 PM EDTSevere Thunderstorm WarningRLXLewis, Randolph, Upshur48 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 8.9 hours before the alert went out and 141 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, Pittsburgh, PA at 12:00Z on 2021-06-14Temperature 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, Pittsburgh, PA at 12:00Z on 2021-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.1939587897Sfc1 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
1684 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

403 
WWUS20 KWNS 142049
SEL2  
SPC WW 142049
WVZ000-150100-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 272
NWS Storm Prediction Center Norman OK
455 PM EDT Mon Jun 14 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Northern West Virginia

* Effective this Monday afternoon and evening from 455 PM until
  900 PM EDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Isolated large hail events to 1.5 inches in diameter possible

SUMMARY...A cluster with embedded supercell structures may develop
from thunderstorms currently in southeast Ohio, as they spread
across northern West Virginia through about dusk.

The severe thunderstorm watch area is approximately along and 35
statute miles north and south of a line from 20 miles east northeast
of Elkins WV to 20 miles north of Parkersburg WV. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 269...WW 270...WW 271...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
29030.

...Grams

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 14, 11:31 AM EDTMesoscale DiscussionSPCBelmont, Carroll, Columbiana, Harrison, Jefferson, Mahoning89 min
Jun 14, 11:46 AM EDTSevere Thunderstorm WatchSPCBelmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 3 more6 hr
Jun 14, 3:25 PM EDTMesoscale DiscussionSPCBelmont, Harrison, Jefferson95 min
Jun 14, 3:55 PM EDTMesoscale DiscussionSPCBerkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more65 min
Jun 14, 3:59 PM EDTSevere Thunderstorm WatchSPCBerkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more6 hr
Jun 14, 7:37 PM EDTMesoscale DiscussionSPCBarbour, Berkeley, Doddridge, Gilmer, Grant, Hampshire and 14 more113 min

Nearby

Severe Thunderstorm Watches in West Virginia, 2021Every severe thunderstorm watch 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.