Alert archive / West Virginia / Flash Flood Warnings in 1998

Flash Flood Warning 147, NWS Pittsburgh, PA

June 30, 1998Greene County, Pennsylvania; 4 counties in West Virginia

NWS Pittsburgh, PA issued this flash flood warning at Jun 30, 1998, 1:06 AM EDT for Greene County, Pennsylvania; 4 counties in West Virginia. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 30, 1998, 1:06 AM EDT (05:06 UTC)
Expired: Jun 30, 1998, 11:00 AM EDT
In force: 10 hr
Issued by: NWS Pittsburgh, PA
Area: Whole counties

Counties Greene County, PA, Marion County, WV, Marshall County, WV, Monongalia County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 94 km from the middle of the area, began a volume at 05:07 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 (KPIT), launched 00:00Z, 5.1 hours before the alert went out and 83 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: 1362 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 697 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIT 300505
FFWPIT
PAC059-WVC049-051-061-103-301500-

BULLETIN - EAS ACTIVIATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
106 AM EDT TUE JUN 30 1998

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GREENE COUNTY IN SOUTHWESTERN PENNSYLVANIA.
  MARION COUNTY IN NORTHERN WEST VIRGINIA.
  MARSHALL COUNTY IN NORTHERN WEST VIRGINIA.
  MONONGALIA COUNTY IN NORTHERN WEST VIRGINIA.
  WETZEL COUNTY IN NORTHERN WEST VIRGINIA.

* UNTIL 1100 AM EDT.

* NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT RAIN HEAVY
  ENOUGH TO CAUSE FLOODING WILL OCCUR OVER EXTREME NORTHERN WEST
  VIRGINIA AND EXTREME SOUTHWEST PENNSYLVANIA.

* PERIODS OF HEAVY RAIN WILL OCCUR THROUGH 5 AM.  RAINFALL AMOUNTS
  EXCEEDING A HALF INCH IN AN HOUR WILL CAUSE FLOODING. MUDSLIDES
  AND EXTREMELY RAPID STREAM RISES ARE ALSO POSSIBLE.

<<CALL TO ACTION>>BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS
HARDER TO RECOGNIZE6 THE DANGER OF FLOODING.

.END/PM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 2:19 PM EDT	Flash Flood Warning	PBZ	Beaver	5 hr
Jun 30, 2:21 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver	59 min
Jun 30, 2:39 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Butler	71 min
Jun 30, 2:55 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	60 min
Jun 30, 3:05 PM EDT	Severe Thunderstorm Warning	PBZ	Westmoreland	75 min
Jun 30, 3:09 PM EDT	Severe Thunderstorm Warning	PBZ	Armstrong	61 min
Jun 30, 3:23 PM EDT	Flash Flood Warning	PBZ	Washington	5 hr
Jun 30, 3:25 PM EDT	Severe Thunderstorm Warning	PBZ	Indiana	60 min
Jun 30, 4:35 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	45 min
Jun 30, 4:47 PM EDT	Flash Flood Warning	PBZ	Fayette, Greene	3 hr
Jun 30, 2:19 PM EDT	Flash Flood Warning	PBZ	Hancock	5 hr
Jun 30, 2:21 PM EDT	Severe Thunderstorm Warning	PBZ	Hancock	59 min
Jun 30, 3:48 PM EDT	Severe Thunderstorm Warning	PBZ	Brooke, Ohio	42 min
Jun 30, 5:42 PM EDT	Severe Thunderstorm Warning	PBZ	Preston	58 min

Nearby

Flash Flood Warnings in West Virginia, 1998 Flash Flood Warnings in Pennsylvania, 1998 Every flash flood warning in 1998

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.