Alert archive / West Virginia / Flash Flood Warnings in 2017

Flash Flood Warning 9, NWS Charleston, WV

May 5, 2017Harrison County, Lewis County, West Virginia

NWS Charleston, WV issued this flash flood warning at May 5, 2017, 11:36 PM EDT for Harrison County, Lewis County, West Virginia. It was in force for 4 hr. 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 5, 2017, 11:36 PM EDT (03:36 UTC)
Expired
May 6, 2017, 3:30 AM EDT
In force
4 hr
Issued by
NWS Charleston, WV
Area
Storm-based polygon
Flood severity
None

Counties Harrison County, WV, Lewis County, WV

The radar

The Charleston,WV radar (KRLX), 135 km from the middle of the area, began a volume at 03:39 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

Pittsburgh, PA (KAGC), launched 00:00Z, 3.6 hours before the alert went out and 157 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 00:00Z on 2017-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2017-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -109 square meters per square second.1939587897117Sfc1 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
-212 J/kg
Mixed-layer LCL
691 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-109 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

851 
WGUS51 KRLX 060336
FFWRLX
WVC033-041-060730-
/O.NEW.KRLX.FF.W.0009.170506T0336Z-170506T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Charleston WV
1136 PM EDT FRI MAY 5 2017

The National Weather Service in Charleston West Virginia has issued a

* Flash Flood Warning for...
  Lewis County in northern West Virginia...
  Southern Harrison County in northern West Virginia...

* Until 330 AM EDT

* At 1134 PM EDT, trained weather spotters reported heavy rain 
  across the warned area. Up to one inch of rain in an hour has 
  already fallen and rain will continue. Flash flooding is occurring 
  or is expected to begin shortly.

* Some locations that will experience flooding include...
  Clarksburg, Weston, Stonewood, Nutter Fort, Stonewall Jackson,
  Jackson Mill, West Milford, Lost Creek, Jane Lew, Camden, Sand Run,
  Wolf Summit, Walkersville and Horner.

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 3920 8024 3910 8028 3910 8030 3903 8031
      3889 8037 3888 8038 3881 8040 3882 8048
      3883 8047 3886 8052 3885 8054 3887 8056
      3887 8059 3893 8063 3910 8062 3918 8058
      3920 8053 3921 8053 3922 8056 3936 8049

$$

05
2 follow-up statements
795 
WGUS71 KRLX 060512
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
112 AM EDT SAT MAY 6 2017

WVC033-041-060730-
/O.CON.KRLX.FF.W.0009.000000T0000Z-170506T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lewis WV-Harrison WV-
112 AM EDT SAT MAY 6 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM EDT FOR
LEWIS AND SOUTHERN HARRISON COUNTIES...

At 106 AM EDT, Doppler radar and automated rain gauges indicated 
that light to moderate rain was falling over the warned area. No new 
reports of flooding have been received since an earlier report 
around 1130 PM in the Weston area. However, although the rain has 
decreased in intensity at 1 AM, the threat of more heavy rain will 
continue through 3 AM. 

Some locations that will experience flooding include...
Clarksburg, Weston, Stonewood, Nutter Fort, Stonewall Jackson,
Jackson Mill, West Milford, Lost Creek, Jane Lew, Camden, Sand Run,
Wolf Summit, Walkersville and Horner.

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 3920 8024 3910 8028 3910 8030 3903 8031
      3889 8037 3888 8038 3881 8040 3882 8048
      3883 8047 3886 8052 3885 8054 3887 8056
      3887 8059 3893 8063 3910 8062 3918 8058
      3920 8053 3921 8053 3922 8056 3936 8049

$$

05
550 
WGUS71 KRLX 060620
FFSRLX

Flash Flood Statement
National Weather Service Charleston WV
220 AM EDT SAT MAY 6 2017

WVC033-041-060625-
/O.CAN.KRLX.FF.W.0009.000000T0000Z-170506T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lewis WV-Harrison WV-
220 AM EDT SAT MAY 6 2017

...THE FLASH FLOOD WARNING FOR LEWIS AND SOUTHERN HARRISON COUNTIES
IS CANCELLED...

The heavy rain has ended. Although light rain will continue, 
flooding is no longer expected to pose a threat through 330 AM. 
However, we will monitor another band of heavier rain that may move 
into this area later this morning. 

LAT...LON 3920 8024 3910 8028 3910 8030 3903 8031
      3889 8037 3888 8038 3881 8040 3882 8048
      3883 8047 3886 8052 3885 8054 3887 8056
      3887 8059 3893 8063 3910 8062 3918 8058
      3920 8053 3921 8053 3922 8056 3936 8049

$$

05

Nearby

Flash Flood Warnings in West Virginia, 2017Every flash flood 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.