Alert archive / Pennsylvania / Flash Flood Warnings in 2012
Flash Flood Warning 2, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at May 7, 2012, 10:32 PM EDT for Mercer County, Pennsylvania. It was in force for 4 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
- May 7, 2012, 10:32 PM EDT (02:32 UTC)
- Expired
- May 8, 2012, 2:30 AM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Mercer County, PA
The radar
The Pittsburgh radar (KPBZ), 82 km from the middle of the area, began a volume at 02:35 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 |
|---|---|---|---|
| May 8, 12:31 AM EDT | FLOOD | Hermitage, PA | BROADWAY AVE CLOSED IN HERMITAGE DUE TO HIGH WATER |
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 00:00Z, 2.5 hours before the alert went out and 97 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
- 920 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 1102 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.2
The text
As transmitted, in the capitals the NWS used until 2016.
069 WGUS51 KPBZ 080232 FFWPBZ PAC085-080630- /O.NEW.KPBZ.FF.W.0002.120508T0232Z-120508T0630Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 1032 PM EDT MON MAY 7 2012 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN MERCER COUNTY IN NORTHWEST PENNSYLVANIA... * UNTIL 230 AM EDT * AT 1025 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED MORE RAIN FROM SHOWERS AND THUNDERSTORMS 13 MILES SOUTHWEST OF FARRELL...OR ABOUT NEAR YOUNGSTOWN...MOVING NORTHEAST AT 30 MPH. IN ADDITION...COUNTY OFFICIALS REPORTED NUMEROUS WATER COVERED ROADS AND SMALL STREAMS OUT OF BANKS. RADAR ESTIMATES ARE OF 1.5 TO 2.5 INCHES OF RAIN ACROSS THIS AREA...WITH ANOTHER 0.5 TO 1.0 INCH POSSIBLE OVERNIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. IF YOU ARE IN THE WARNING AREA...MOVE TO HIGHER GROUND IMMEDIATELY. PERSONS RESIDING ALONG STREAMS SHOULD TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH BY FOOT OR AUTOMOBILE. PLEASE REPORT HIGH WATER TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772. LAT...LON 4135 8051 4135 8013 4113 8013 4114 8052 $$ 15
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 8:29 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 46 min |
| May 7, 8:36 PM EDT | Special Weather Statement | PBZ | Mercer | 39 min |
| May 7, 9:24 PM EDT | Special Weather Statement | PBZ | Lawrence, Mercer | 51 min |
| May 7, 9:33 PM EDT | Areal Flood Advisory | PBZ | Mercer | 3 hr |
| May 7, 10:11 PM EDT | Special Weather Statement | PBZ | Allegheny | 34 min |
| May 8, 12:09 AM EDT | Areal Flood Advisory | PBZ | Butler | 3 hr |
| May 8, 7:22 AM EDT | Flood Watch | PBZ | Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 5 more | 5 hr |
| May 8, 6:47 PM EDT | Special Weather Statement | PBZ | Westmoreland | 58 min |
| May 8, 7:53 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2012Every flash flood warning in 2012
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.