Alert archive / Pennsylvania / Flash Flood Warnings in 1997
Flash Flood Warning 18, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at May 19, 1997, 6:37 PM EDT for Allegheny County, Pennsylvania. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 19, 1997, 6:37 PM EDT (22:37 UTC)
- Expired
- May 19, 1997, 7:30 PM EDT
- In force
- 53 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Allegheny County, PA
The radar
The Pittsburgh radar (KPBZ), 21 km from the middle of the area, began a volume at 22:37 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 12:00Z, 10.6 hours before the alert went out and 12 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.
- Mixed-layer CAPE
- 10 J/kg
- Mixed-layer CIN
- -92 J/kg
- Mixed-layer LCL
- 626 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 192236 FFWPIT PAC003-192330- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 637 PM EDT MON MAY 19 1997 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 730 PM EDT FOR THE FOLLOWING LOCATION... IN WEST PENNSYLVANIA ...ALLEGHENY COUNTY AT 634 PM WEATHER RADAR SHOWED SEVERE THUNDERSTORMS WITH TORRENTIAL DOWNPOURS MOVING INTO SOUTHERN ALLEGHENY COUNTY FROM WASHINGTON COUNTY. RAINFALL RATES OF AROUND ONE INCH IN AN HOUR WILL CAUSE FLOODING. LARGE HAIL IS ALSO POSSIBLE WITH THIS DANGEROUS SITUATION. TAKE SHELTER INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR APPLIANCES UNLESS IT'S AN EMERGENCY UNTIL THE STORM HAS PASSED. DO NOT DRIVE INTO LOW WATER CROSSINGS.
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
Local storm report, May 19, 5:32 PM EDT, 1 hour 5 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
532 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0527 PM SEWICKLEY HEIGHTS PA WIND GUST 66 MPH.
05/19/97 ALLEGHENYLocal storm report, May 19, 5:33 PM EDT, 1 hour 4 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
532 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0527 PM SEWICKLEY HEIGHTS PA WIND GUST 66 MPH.
05/19/97 ALLEGHENYLocal storm report, May 19, 6:13 PM EDT, 24 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
613 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0559 PM NEW KENSINGTON PA WIND DAMAGE
05/19/97 WESTMORELAND NUMEROUS TREES AND POWER LINES
BLOWN DOWN.
0556 PM MC CANDLESS TWP PA WIND DAMAGE
05/19/97 ALLEGHENY TREES DOWN SEVERAL LOCATIONS
SUCH AS NORTH PARK.
0606 PM OAKMONT PA 0.75 INCH HAIL
05/19/97 ALLEGHENYLocal storm report, May 19, 6:16 PM EDT, 21 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
613 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0559 PM NEW KENSINGTON PA WIND DAMAGE
05/19/97 WESTMORELAND NUMEROUS TREES AND POWER LINES
BLOWN DOWN.
0556 PM MC CANDLESS TWP PA WIND DAMAGE
05/19/97 ALLEGHENY l TREES DOWN SEVERAL LOCATIONS
SUCH AS NORTH PARK.
0606 PM OAKMONT PA 0.75 INCH HAIL
05/19/97 ALLEGHENYLocal storm report, May 19, 6:17 PM EDT, 20 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
618 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0614 PM WHEELING r WV WIND DAMAGE
05/19/97 OHIO TREES DOWN AND WINDOWS BLOWN OUT.Local storm report, May 19, 6:18 PM EDT, 19 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
618 PM EDT MON MAY 19 1997
TIME(EDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0614 PM WHEELING WV WIND DAMAGE
05/19/97 OHIO TREES DOWN AND WINDOWS BLOWN OUT.The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 8:33 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington | 27 min |
| May 18, 9:19 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 41 min |
| May 18, 11:26 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 64 min |
| May 19, 12:06 AM EDT | Severe Thunderstorm Warning | PBZ | Venango | 69 min |
| May 19, 12:36 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 69 min |
| May 19, 5:19 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 26 min |
| May 19, 5:24 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 51 min |
| May 19, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 49 min |
| May 19, 6:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana | 41 min |
| May 19, 6:21 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 54 min |
| May 19, 6:37 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 53 min |
| May 19, 6:40 PM EDT | Flash Flood Warning | PBZ | Washington | 3 hr |
| May 19, 6:46 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| May 19, 6:46 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 3 hr |
| May 19, 6:57 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 33 min |
| May 19, 7:07 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 68 min |
| May 19, 7:36 PM EDT | Flash Flood Warning | PBZ | Allegheny | 2 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1997Every flash flood warning in 1997
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.