Alert archive / Pennsylvania / Flash Flood Warnings in 2017
Flash Flood Warning 21, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 15, 2017, 8:43 PM EDT for Allegheny County, Washington County, Pennsylvania. It was in force for 3 hr. 4 reports 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 15, 2017, 8:43 PM EDT (00:43 UTC)
- Expired
- Jun 15, 2017, 11:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegheny County, PA, Washington County, PA
The radar
The Pittsburgh radar (KPBZ), 37 km from the middle of the area, began a volume at 00:46 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 15, 9:05 PM EDT | FLASH FLOOD | 1 Ne Pleasant Hills, PA | STATE ROUTE 51 CLOSED BETWEEN EAST BRUCETON AND LEWIS RUN DUE TO FLOODING |
| Jun 15, 9:08 PM EDT | FLASH FLOOD | 2 Sw Munhall, PA | MIFFLIN ROAD CLOSED DUE TO FLOODING |
| Jun 15, 9:42 PM EDT | FLASH FLOOD | 2 Ese Pleasant Hills, PA | HIGH WATER FLOWING OVER COAL VALLEY ROAD MAKING IT IMPASSABLE |
| Jun 15, 11:30 PM EDT | FLASH FLOOD | Dravosburg, PA | MUDSLIDE ONTO RT 837 LEFT IT COVERED IN MULTIPLE INCHES OF MUD AFTER EARLIER FLOODING |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 00:00Z, 0.7 hours before the alert went out and 23 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
- 110 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1111 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
107
WGUS51 KPBZ 160043
FFWPBZ
PAC003-125-160345-
/O.NEW.KPBZ.FF.W.0021.170616T0043Z-170616T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
843 PM EDT THU JUN 15 2017
The National Weather Service in Pittsburgh has issued a
* Flash Flood Warning for...
Central Washington County in southwestern Pennsylvania...
Southern Allegheny County in southwestern Pennsylvania...
* Until 1145 PM EDT.
* At 842 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience flooding include...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
McMurray, McKeesport, Canonsburg, Gastonville, Plum, West Mifflin
and Baldwin.
Please report flooding by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4042 7972 4039 7977 4031 7979 4028 7981
4026 7980 4023 7982 4011 8016 4031 8033
4054 7975 4054 7973 4051 7971
$$The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 9:20 PM EDT | Special Weather Statement | PBZ | Westmoreland | 55 min |
| Jun 15, 10:19 PM EDT | Areal Flood Advisory | PBZ | Westmoreland | 4 hr |
| Jun 15, 11:39 PM EDT | Areal Flood Advisory | PBZ | Allegheny | 8 hr |
| Jun 16, 2:43 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 16, 2:51 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 39 min |
| Jun 16, 3:02 PM EDT | Flash Flood Warning | PBZ | Allegheny | 3 hr |
| Jun 16, 3:17 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 28 min |
| Jun 16, 3:34 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 3 hr |
| Jun 16, 4:07 PM EDT | Areal Flood Advisory | PBZ | Indiana | 3 hr |
| Jun 16, 4:10 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 18 min |
| Jun 16, 4:27 PM EDT | Special Weather Statement | PBZ | Greene | 33 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2017Every flash flood warning in 2017
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.