Alert archive / West Virginia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 49, NWS Charleston, WV

May 20, 2017Boone County, Kanawha County, West Virginia

NWS Charleston, WV issued this severe thunderstorm warning at May 20, 2017, 8:02 PM EDT for Boone County, Kanawha County, West Virginia. It was in force for 28 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: May 20, 2017, 8:02 PM EDT (00:02 UTC)
Expired: May 20, 2017, 8:30 PM EDT
In force: 28 min
Issued by: NWS Charleston, WV
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Boone County, WV, Kanawha County, WV

The radar

The Charleston,WV radar (KRLX), 3 km from the middle of the area, began a volume at 00:02 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.0 hours before the alert went out and 215 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: 919 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

327 
WUUS51 KRLX 210002
SVRRLX
WVC005-039-210030-
/O.NEW.KRLX.SV.W.0049.170521T0002Z-170521T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston WV
802 PM EDT SAT MAY 20 2017

The National Weather Service in Charleston West Virginia has issued a

* Severe Thunderstorm Warning for...
  West central Kanawha County in central West Virginia...
  North central Boone County in central West Virginia...

* Until 830 PM EDT

* At 801 PM EDT, a severe thunderstorm was located near Marmet, or 8
  miles south of Charleston, moving north at 10 mph.

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

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Charleston, Nitro, Jefferson, South Charleston, St. Albans, Dunbar,
  Chesapeake, Marmet, Belle, Alum Creek, Institute, Cross Lanes, Coal
  Fork and Tornado.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 Interstate 79 between mile markers 1 and 5.
 Interstate 77 in West Virginia between mile markers 96 and 109.
 Interstate 64 in West Virginia between mile markers 48 and 57.
 West Virginia Turnpike between mile markers 88 and 95.
 Route 119 between mile markers 69 and 80.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

Please report Severe Weather to the National Weather Service by
calling toll free, 800 401 9535, when you can do so safely.

You may also report severe weather by posting your report to the
Charleston West Virginia National Weather Service Facebook Page, or
by using the Twitter Hashtag, NWSRLX.

&&

LAT...LON 3838 8186 3845 8172 3845 8155 3822 8153
      3819 8175 3830 8182 3831 8181 3832 8183
TIME...MOT...LOC 0001Z 166DEG 7KT 3822 8166 

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

17

1 follow-up statement

285 
WWUS51 KRLX 210020
SVSRLX

Severe Weather Statement
National Weather Service Charleston WV
820 PM EDT SAT MAY 20 2017

WVC005-039-210030-
/O.EXP.KRLX.SV.W.0049.000000T0000Z-170521T0030Z/
Kanawha WV-Boone WV-
820 PM EDT SAT MAY 20 2017

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL KANAWHA AND NORTH
CENTRAL BOONE COUNTIES WILL EXPIRE AT 830 PM EDT...
                
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 will be allowed to expire.

LAT...LON 3838 8186 3845 8172 3845 8155 3822 8153
      3819 8175 3830 8182 3831 8181 3832 8183
TIME...MOT...LOC 0020Z 166DEG 7KT 3822 8166 

$$

17

Nearby

Severe Thunderstorm Warnings in West Virginia, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.