Alert archive / Pennsylvania / Flash Flood Warnings in 2016

Flash Flood Warning 9, NWS Pittsburgh, PA

June 3, 2016Allegheny County, Beaver County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jun 3, 2016, 6:16 AM EDT for Allegheny County, Beaver County, Pennsylvania. It was in force for 3 hr. 2 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 3, 2016, 6:16 AM EDT (10:16 UTC)
Expired
Jun 3, 2016, 9:15 AM EDT
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

Counties Allegheny County, PA, Beaver County, PA

The radar

The Pittsburgh radar (KPBZ), 15 km from the middle of the area, began a volume at 10:17 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

TimeReportWhereRemark
Jun 3, 6:24 AM EDTFLASH FLOOD1 Nw Aliquippa, PACHAPEL ROAD FLOODED
Jun 3, 6:45 AM EDTFLASH FLOODHarmony Township, PAFLOODED ROADS

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, 10.3 hours before the alert went out and 29 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-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2016-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 392 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2016-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
392 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1185 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
39 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted.

666 
WGUS51 KPBZ 031017
FFWPBZ
PAC003-007-031315-
/O.NEW.KPBZ.FF.W.0009.160603T1016Z-160603T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
616 AM EDT FRI JUN 3 2016

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL BEAVER COUNTY IN WESTERN PENNSYLVANIA...
  NORTHWESTERN ALLEGHENY COUNTY IN SOUTHWESTERN PENNSYLVANIA...

* UNTIL 915 AM EDT

* AT 616 AM EDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ROSS TOWNSHIP...MCCANDLESS TOWNSHIP...FRANKLIN PARK...ALIQUIPPA...
  MONACA...ECONOMY...AMBRIDGE...WEXFORD...NEW BRIGHTON...BEAVER...
  BADEN...ROCHESTER...OHIOVILLE...HARMONY TOWNSHIP...GIBSONIA...
  MIDLAND...INDUSTRY...LEETSDALE...
  SHIPPINGPORT AND PATTERSON TOWNSHIP.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 30 AND 35.
 
  INTERSTATE 79 IN PENNSYLVANIA BETWEEN MILE MARKERS 68 AND 77.
 
  INTERSTATE 279 IN PENNSYLVANIA BETWEEN MILE MARKERS 10 AND 13.
 
  INTERSTATE 376 IN PENNSYLVANIA BETWEEN MILE MARKERS 34 AND 46.
 
PLEASE REPORT FLOODING BY CALLING 4 1 2...2 6 2...1 9 8 8...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.

&&

LAT...LON 4070 8015 4067 8015 4067 7996 4054 8006
      4060 8047 4075 8046

$$
1 follow-up statement
630 
WGUS71 KPBZ 031119
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
718 AM EDT FRI JUN 3 2016

PAC003-007-031128-
/O.CAN.KPBZ.FF.W.0009.000000T0000Z-160603T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEAVER PA-ALLEGHENY PA-
718 AM EDT FRI JUN 3 2016

...THE FLASH FLOOD WARNING FOR CENTRAL BEAVER AND NORTHWESTERN
ALLEGHENY COUNTIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED AND AREAS OF PONDED WATER WILL SLOWLY
RECEDE. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 4070 8015 4067 8015 4067 7996 4054 8006
      4060 8047 4075 8046

$$
15

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 2, 8:19 PM EDTSpecial Weather StatementPBZWestmoreland56 min
Jun 2, 8:40 PM EDTSpecial Weather StatementPBZBeaver35 min
Jun 2, 9:10 PM EDTAreal Flood AdvisoryPBZClarion, Venango65 min
Jun 2, 9:37 PM EDTSpecial Weather StatementPBZButler23 min
Jun 3, 1:01 AM EDTFlash Flood WarningPBZForest, Jefferson3 hr
Jun 3, 5:11 AM EDTAreal Flood AdvisoryPBZAllegheny, Beaver3 hr
Jun 3, 7:54 AM EDTAreal Flood AdvisoryPBZWestmoreland2 hr
Jun 3, 8:11 AM EDTFlash Flood WarningPBZWestmoreland3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2016Every flash flood warning in 2016

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.