Alert archive / Pennsylvania / Flash Flood Warnings in 2016

Flash Flood Warning 3, NWS Pittsburgh, PA

May 29, 2016Allegheny County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at May 29, 2016, 1:01 PM EDT for Allegheny County, Pennsylvania. It was in force for 3 hr. 6 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
May 29, 2016, 1:01 PM EDT (17:01 UTC)
Expired
May 29, 2016, 4:00 PM EDT
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Storm-based polygon
Flood severity
None

County Allegheny County, PA

The radar

The Pittsburgh radar (KPBZ), 31 km from the middle of the area, began a volume at 17:02 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
May 29, 1:17 PM EDTFLASH FLOODHomestead, PAFOREST AVE CLOSED
May 29, 1:17 PM EDTFLASH FLOODHomestead Park, PAFOREST AVE CLOSED
May 29, 1:44 PM EDTFLASH FLOOD1 Sse Hays, PACARS ABANDONED AT INTERSECTION OF MIFFLIN RD AND LEBANON RD
May 29, 1:44 PM EDTFLASH FLOOD1 Ssw West Homestead, PACARS ABANDONED AT INTERSECTION OF MIFFLIN RD AND LEBANON RD
May 29, 2:24 PM EDTFLASH FLOODWest Homestead, PAMUDSLIDE ON ROADWAY AT THE CORNER OF FOREST AVE AND WEST 8TH AVE.
May 29, 3:04 PM EDTFLASH FLOOD1 Wnw West Mifflin, PALEBANON ROAD DAMAGED BY 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 12:00Z, 5.0 hours before the alert went out and 18 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 12:00Z on 2016-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 231 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 12:00Z on 2016-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 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
231 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1300 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

957 
WGUS51 KPBZ 291701
FFWPBZ
PAC003-292000-
/O.NEW.KPBZ.FF.W.0003.160529T1701Z-160529T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
101 PM EDT SUN MAY 29 2016

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

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

* UNTIL 400 PM EDT

* AT 100 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...WEST MIFFLIN...BALDWIN...WILKINSBURG...MUNHALL...
  SWISSVALE...FOREST HILLS...DUQUESNE...NORTH BRADDOCK...HOMESTEAD...
  EDGEWOOD...CHURCHILL...BRADDOCK...RANKIN...WEST HOMESTEAD...
  BRADDOCK HILLS AND WHITAKER.

 
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 4044 7985 4037 7985 4037 7995 4044 7995

$$
2 follow-up statements
058 
WGUS71 KPBZ 291752
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
152 PM EDT SUN MAY 29 2016

PAC003-292000-
/O.CON.KPBZ.FF.W.0003.000000T0000Z-160529T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHENY PA-
152 PM EDT SUN MAY 29 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM EDT FOR
CENTRAL ALLEGHENY COUNTY...

AT 148 PM EDT...EMERGENCY MANAGEMENT REPORTED FLOODED ROADWAYS WHILE
AREA OBSERVATIONS INDICATED OVER TWO INCHES OF RAIN HAD BEEN
OBSERVED NEAR THE WARNED AREA. FLASH FLOODING IS ALREADY OCCURING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
PITTSBURGH...WEST MIFFLIN...BALDWIN...WILKINSBURG...MUNHALL...
SWISSVALE...FOREST HILLS...DUQUESNE...NORTH BRADDOCK...HOMESTEAD...
EDGEWOOD...CHURCHILL...BRADDOCK...RANKIN...WEST HOMESTEAD...
BRADDOCK HILLS AND WHITAKER.

 
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 4044 7985 4037 7985 4037 7995 4044 7995

$$
267 
WGUS71 KPBZ 291953
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
353 PM EDT SUN MAY 29 2016

PAC003-292001-
/O.EXP.KPBZ.FF.W.0003.000000T0000Z-160529T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ALLEGHENY PA-
353 PM EDT SUN MAY 29 2016

...THE FLASH FLOOD WARNING FOR CENTRAL ALLEGHENY COUNTY WILL EXPIRE
AT 400 PM EDT...

THE HEAVY RAIN HAS ENDED AND NO NEW FLOODING IS EXPECTED TO OCCUR IN
THE NEAR FUTURE. IF ADDITIONAL STORMS DEVELOP LATER TODAY OVER THE
PREVIOUSLY WARNED AREAS ADDITIONAL PRODUCTS MAY BE NEEDED. PLEASE
CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4044 7985 4037 7985 4037 7995 4044 7995

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 9:26 PM EDTFlash Flood WarningPBZFayette3 hr
May 28, 10:41 PM EDTAreal Flood AdvisoryPBZIndiana, Westmoreland3 hr
May 29, 1:30 PM EDTFlash Flood WarningPBZAllegheny, Washington3 hr
May 29, 3:17 PM EDTAreal Flood AdvisoryPBZFayette, Indiana, Westmoreland3 hr
May 29, 4:02 PM EDTFlash Flood WarningPBZBeaver3 hr
May 29, 7:26 PM EDTSpecial Weather StatementPBZLawrence34 min

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.