Alert archive / West Virginia / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Pittsburgh, PA

June 21, 2021Monongalia County, West Virginia

NWS Pittsburgh, PA issued this flash flood warning at Jun 21, 2021, 6:56 PM EDT for Monongalia County, West Virginia. It was in force for 2 hr. 1 report 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: Jun 21, 2021, 6:56 PM EDT (22:56 UTC)
Expired: Jun 21, 2021, 9:00 PM EDT
In force: 2 hr
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Flood severity: None

County Monongalia County, WV

The radar

The Pittsburgh radar (KPBZ), 101 km from the middle of the area, began a volume at 22:57 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
Jun 21, 7:30 PM EDT	FLASH FLOOD	Cheat Lake, WV	REPORT OF FLOODING OVER I-68 BRIDGE IN CHEAT LAKE.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.9 hours before the alert went out and 86 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: 931 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 988 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 277 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.1

Open this sounding in Storm Lab

The text

As transmitted.

406 
WGUS51 KPBZ 212256
FFWPBZ
WVC061-220100-
/O.NEW.KPBZ.FF.W.0008.210621T2256Z-210622T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
656 PM EDT Mon Jun 21 2021

The National Weather Service in Pittsburgh has issued a

* Flash Flood Warning for...
  Northeastern Monongalia County in northern West Virginia...

* Until 900 PM EDT.

* At 656 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 2 inches of rain have 
  fallen. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Morgantown, Westover, Star City, Granville, Brookhaven, Cassville, 
  Osage, Booth and Cheat Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3969 7994 3968 7987 3967 7983 3963 7984
      3959 7990 3957 8002 3961 8008 3967 8006

FLASH FLOOD...RADAR INDICATED

$$

JL

2 follow-up statements

686 
WGUS71 KPBZ 220004
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
804 PM EDT Mon Jun 21 2021

WVC061-220100-
/O.CON.KPBZ.FF.W.0008.000000T0000Z-210622T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monongalia WV-
804 PM EDT Mon Jun 21 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM EDT THIS EVENING 
FOR NORTHEASTERN MONONGALIA COUNTY...

At 804 PM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Up to 2 inches of rain have fallen. 
Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Morgantown, Westover, Star City, Granville, Brookhaven, Cassville, 
  Osage, Booth and Cheat Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3969 7994 3968 7987 3967 7983 3963 7984
      3959 7990 3957 8002 3961 8008 3967 8006

FLASH FLOOD...RADAR INDICATED

$$

JL

463 
WGUS71 KPBZ 220050
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
850 PM EDT Mon Jun 21 2021

WVC061-220100-
/O.EXP.KPBZ.FF.W.0008.000000T0000Z-210622T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monongalia WV-
850 PM EDT Mon Jun 21 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM EDT THIS EVENING FOR 
NORTHEASTERN MONONGALIA COUNTY...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3969 7994 3968 7987 3967 7983 3963 7984
      3959 7990 3957 8002 3961 8008 3967 8006

$$

JL

The office that day

Everything else NWS Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 21, 1:24 PM EDT	Special Weather Statement	PBZ	Marion	36 min
Jun 21, 1:51 PM EDT	Special Weather Statement	PBZ	Preston	24 min
Jun 21, 1:57 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	48 min
Jun 21, 2:08 PM EDT	Severe Thunderstorm Warning	PBZ	Preston	22 min
Jun 21, 2:21 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	24 min
Jun 21, 2:37 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	23 min
Jun 21, 3:00 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Hancock, Ohio	30 min
Jun 21, 3:29 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Ohio	46 min
Jun 21, 3:53 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Marshall, Ohio	37 min
Jun 21, 4:19 PM EDT	Severe Thunderstorm Warning	PBZ	Marshall, Monongalia, Ohio, Wetzel	41 min
Jun 21, 4:57 PM EDT	Severe Thunderstorm Warning	PBZ	Marshall	29 min
Jun 21, 5:05 PM EDT	Areal Flood Advisory	PBZ	Marshall	3 hr
Jun 21, 5:08 PM EDT	Areal Flood Advisory	PBZ	Marion, Monongalia, Preston, Wetzel	3 hr
Jun 21, 5:41 PM EDT	Special Weather Statement	PBZ	Marion, Monongalia	34 min
Jun 21, 6:07 PM EDT	Severe Thunderstorm Warning	PBZ	Marion, Monongalia, Preston	23 min
Jun 21, 6:12 PM EDT	Areal Flood Advisory	PBZ	Marshall, Ohio	2 hr
Jun 21, 6:26 PM EDT	Special Weather Statement	PBZ	Preston	34 min
Jun 21, 6:39 PM EDT	Areal Flood Advisory	PBZ	Brooke, Marshall, Ohio	2 hr
Jun 21, 7:46 PM EDT	Areal Flood Warning	PBZ	Marion, Monongalia, Preston, Wetzel	3 hr

Nearby

Flash Flood Warnings in West Virginia, 2021 Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.