Alert archive / Pennsylvania / Flash Flood Warnings in 1999

Flash Flood Warning 40, NWS Pittsburgh, PA

April 9, 1999Beaver County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Apr 9, 1999, 4:06 PM EDT for Beaver County, Pennsylvania. It was in force for 2 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: Apr 9, 1999, 4:06 PM EDT (20:06 UTC)
Expired: Apr 9, 1999, 6:08 PM EDT
In force: 2 hr
Issued by: NWS Pittsburgh, PA
Area: Whole counties

County Beaver County, PA

The radar

The Pittsburgh radar (KPBZ), 20 km from the middle of the area, began a volume at 20:06 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.1 hours before the alert went out and 317 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2194 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 614 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Apr 9, 11:55 AM EDT, 4 hours 11 minutes before

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029>032-WVZ001>004-012-021>023-041-092000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1155 AM EDT FRI APR 9 1999

...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ACROSS EAST CENTRAL
OHIO...NORTHERN WEST VIRGINIA...SOUTHWESTERN PENNSYLVANIA...AND
GARRETT COUNTY MARYLAND.

AN UPPER LEVEL DISTURBANCE AND ASSOCIATED SURFACE LOW WILL BE
APPROACHING THE REGION FROM THE WEST THIS AFTERNOON.  THE ATMOSPHERE
WILL REMAIN QUITE UNSTABLE AHEAD OF THIS DISTURBANCE AND THUNDERSTORMS
ARE EXPECTED TO REDEVELOP ACROSS THE REGION THIS AFTERNOON.  IT APPEARS
THAT DAMAGING STRAIGHT-LINE WINDS AND LARGE HAIL WILL BE THE MAIN SEVERE
WEATHER THREAT THIS AFTERNOON. THE THUNDERSTORMS WILL MOVE INTO EAST
CENTRAL OHIO AS EARLY AS 100 TO 200 PM AND INTO WESTERN PENNSYLVANIA AND
NORTHERN WEST VIRGINIA BY 300 TO 400 PM.

IN ADDITION...HEAVY DOWNPOURS ASSOCIATED WITH THESE STORMS MAY PRODUCE
LOCALIZED FLOODING PROBLEMS...ESPECIALLY WHERE SEVERAL STORMS PASS OVER
THE SAME LOCATION.  ISOLATED RAINFALL AMOUNTS OF OVER ONE INCH ARE
POSSIBLE.

AS A RESULT...SKYWARN AND HAM RADIO NETWORK ACTIVATION MAY BE NEEDED
THIS AFTERNOON.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA SOURCES
FOR FURTHER UPDATES ON THIS SEVERE WEATHER POTENTIAL.

WJD/RWH

Special weather statement, Apr 9, 11:55 AM EDT, 4 hours 11 minutes before

MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023-
029>032-WVZ001>004-012-021>023-041-092000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1155 AM EDT FRI APR 9 1999

...SEVERE THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ACROSS EAST CENTRAL
OHIO...NORTHERN WEST VIRGINIA...SOUTHWESTERN PENNSYLVANIA...AND
GARRETT COUNTY MARYLAND.

AN UPPER LEVEL DISTURBANCE AND ASSOCIATED SURFACE LOW WILL BE
APPROACHING THE REGION FROM THE WEST THIS AFTERNOON.  THE ATMOSPHERE
WILL REMAIN QUITE UNSTABLE AHEAD OF THIS DISTURBANCE AND THUNDERSTORMS
ARE EXPECTED TO REDEVELOP ACROSS THE REGION THIS AFTERNOON.  IT APPEARS
THAT DAMAGING STRAIGHT-LINE WINDS AND LARGE HAIL WILL BE THE MAIN SEVERE
WEATHER THREAT THIS AFTERNOON. THE THUNDERSTORMS WILL MOVE INTO EAST
CENTRAL OHIO AS EARLY AS 100 TO 200 PM AND INTO WESTERN PENNSYLVANIA AND
NORTHERN WEST VIRGINIA BY 300 TO 400 PM.

IN ADDITION...HEAVY DOWNPOURS ASSOCIATED WITH THESE STORMS MAY PRODUCE
LOCALIZED FLOODING PROBLEMS...ESPECIALLY WHERE SEVERAL STORMS PASS OVER
THE SAME LOCATION.  ISOLATED RAINFALL AMOUNTS OF OVER ONE INCH ARE
POSSIBLE.

AS A RESULT...SKYWARN AND HAM RADIO NETWORK ACTIVATION MAY BE NEEDED
THIS AFTERNOON.

STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA SOURCES
FOR FURTHER UPDATES ON THIS SEVERE WEATHER POTENTIAL.

WJD/RWH

Local storm report, Apr 9, 3:06 PM EDT, 1 hour before

STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
306 PM EDT FRI APR 09 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0120 PM    ZANESVILLE                OH   WIND DAMAGE
04/09/99   MUSKINGUM                      POWER LINES DOWN

0130 PM    ZANESVILLE MUNI ARPT      OH   58 MPH TSTM GUST
04/09/99   MUSKINGUM

0144 PM    NEW MOSCOW                OH   WIND DAMAGE
04/09/99   COSHOCTON                      TREES AND POWER LINES DOWN

0150 PM    AVA                       OH   WIND DAMAGE
04/09/99   NOBLE                          TREES AND POWER LINES DOWN

0200 PM    KIMBOLTON                 OH   WIND DAMAGE

0200 PM    NEWCOMERSTOWN             OH   WIND DAMAGE
04/09/99   TUSCARAWAS                     TREE DOWN

0215 PM    BETHESDA                  OH   WIND DAMAGE
04/09/99   BELMONT                        TREES DOWN

0220 PM    POWHATAN PT               OH   65 MPH TSTM GUST
04/09/99   BELMONT                        ESTIMATED WINDS 60-70MPH

0229 PM    WHEELING ARPT             WV   58 MPH TSTM GUST
04/09/99   OHIO

0230 PM    FAIRVIEW                  WV   58 MPH TSTM GUST
04/09/99   MARSHALL                       ESTIMATED

0235 PM    WHEELING                  WV   1 INCH HAIL
04/09/99   OHIO

0239 PM    RAYLAND                   OH   WIND DAMAGE
04/09/99   JEFFERSON                      TREE DOWN
NNNN

Local storm report, Apr 9, 3:06 PM EDT, 1 hour before

STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
306 PM EDT FRI APR 09 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0120 PM    ZANESVILLE                OH   WIND DAMAGE
04/09/99   MUSKINGUM                      POWER LINES DOWN

0130 PM    ZANESVILLE MUNI ARPT      OH   58 MPH TSTM GUST
04/09/99   MUSKINGUM

0144 PM    NEW MOSCOW                OH   WIND DAMAGE
04/09/99   COSHOCTON                      TREES AND POWER LINES DOWN

0150 PM    AVA                       OH   WIND DAMAGE
04/09/99   NOBLE                          TREES AND POWER LINES DOWN

0200 PM    KIMBOLTON                 OH   WIND DAMAGE

0200 PM    NEWCOMERSTOWN             OH   WIND DAMAGE
04/09/99   TUSCARAWAS                     TREE DOWN

0215 PM    BETHESDA                  OH   WIND DAMAGE
04/09/99   BELMONT                        TREES DOWN

0220 PM    POWHATAN PT               OH   65 MPH TSTM GUST
04/09/99   BELMONT                        ESTIMATED WINDS 60-70MPH

0229 PM    WHEELING ARPT             WV   58 MPH TSTM GUST
04/09/99   OHIO

0230 PM    FAIRVIEW                  WV   58 MPH TSTM GUST
04/09/99   MARSHALL                       ESTIMATED

0235 PM    WHEELING                  WV   1 INCH HAIL
04/09/99   OHIO

0239 PM    RAYLAND                   OH   WIND DAMAGE
04/09/99   JEFFERSON                      TREE DOWN
NNNN

Local storm report, Apr 9, 3:47 PM EDT, 19 minutes before

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Local storm report, Apr 9, 3:47 PM EDT, 19 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 2:33 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	58 min
Apr 9, 2:44 PM EDT	Severe Thunderstorm Warning	PBZ	Greene	59 min
Apr 9, 2:52 PM EDT	Flash Flood Warning	PBZ	Allegheny, Washington	3 hr
Apr 9, 2:54 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny	60 min
Apr 9, 2:58 PM EDT	Flash Flood Warning	PBZ	Fayette, Greene	3 hr
Apr 9, 3:11 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Westmoreland	79 min
Apr 9, 3:39 PM EDT	Tornado Warning	PBZ	Westmoreland	51 min
Apr 9, 4:19 PM EDT	Flash Flood Warning	PBZ	Westmoreland	3 hr
Apr 9, 4:23 PM EDT	Flash Flood Warning	PBZ	Butler	3 hr
Apr 9, 5:51 PM EDT	Flash Flood Warning	PBZ	Washington, Westmoreland	4 hr
Apr 9, 6:59 PM EDT	Flash Flood Warning	PBZ	Fayette	3 hr
Apr 9, 1:02 PM EDT	Severe Thunderstorm Warning	PBZ	Coshocton, Muskingum	43 min
Apr 9, 1:32 PM EDT	Severe Thunderstorm Warning	PBZ	Guernsey, Tuscarawas	43 min
Apr 9, 1:45 PM EDT	Severe Thunderstorm Warning	PBZ	Noble	45 min
Apr 9, 1:53 PM EDT	Severe Thunderstorm Warning	PBZ	Harrison	45 min
Apr 9, 2:03 PM EDT	Severe Thunderstorm Warning	PBZ	Belmont	59 min
Apr 9, 2:20 PM EDT	Severe Thunderstorm Warning	PBZ	Jefferson	59 min
Apr 9, 2:22 PM EDT	Severe Thunderstorm Warning	PBZ	Marshall	61 min
Apr 9, 2:25 PM EDT	Severe Thunderstorm Warning	PBZ	Ohio	45 min

Nearby

Flash Flood Warnings in Pennsylvania, 1999 Every flash flood warning in 1999

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.