Alert archive / Pennsylvania / Flash Flood Warnings in 2016

Flash Flood Warning 13, NWS Pittsburgh, PA

June 16, 20164 counties in Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jun 16, 2016, 4:12 PM EDT for 4 counties in Pennsylvania. It was in force for 3 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: Jun 16, 2016, 4:12 PM EDT (20:12 UTC)
Expired: Jun 16, 2016, 7:15 PM EDT
In force: 3 hr
Issued by: NWS Pittsburgh, PA
Area: Storm-based polygon
Flood severity: None

Counties Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA

The radar

The Pittsburgh radar (KPBZ), 45 km from the middle of the area, began a volume at 20:13 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 16, 7:00 PM EDT	FLASH FLOOD	1 E Monessen, PA	NEAR 730 TYROL BLVD IN MONESSEN: STREAM OUT OF ITS BANKS FLOWING OVER THE ROAD WITH SEVERAL FEET OF WATER AND HOUSE SURROUNDED BY 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 (KAGC), launched 12:00Z, 8.2 hours before the alert went out and 28 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 645 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

621 
WGUS51 KPBZ 162012
FFWPBZ
PAC003-051-125-129-162315-
/O.NEW.KPBZ.FF.W.0013.160616T2012Z-160616T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
412 PM EDT THU JUN 16 2016

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN FAYETTE COUNTY IN SOUTHWESTERN PENNSYLVANIA...
  SOUTHEASTERN WASHINGTON COUNTY IN SOUTHWESTERN PENNSYLVANIA...
  SOUTHEASTERN ALLEGHENY COUNTY IN SOUTHWESTERN PENNSYLVANIA...
  SOUTHWESTERN WESTMORELAND COUNTY IN SOUTHWESTERN PENNSYLVANIA...

* UNTIL 715 PM EDT

* AT 411 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. MORE THAN AN INCH OF RAIN IS
  FALLING WITH THE AREA OF THUNDERSTORMS. FLASH FLOODING IS EXPECTED
  TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BETHEL PARK...MCMURRAY...MCKEESPORT...WASHINGTON...JEANNETTE...
  CANONSBURG...GASTONVILLE...WEST MIFFLIN...BALDWIN...
  UPPER ST. CLAIR...WHITEHALL...SOUTH PARK TOWNSHIP...CECIL-BISHOP...
  JEFFERSON HILLS...PLEASANT HILLS...WHITE OAK...MONESSEN...
  CLAIRTON...CALIFORNIA AND DONORA.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
  INTERSTATE 70 IN PENNSYLVANIA BETWEEN MILE MARKERS 19 AND 54.
 
  PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 65 AND 72.
 
  INTERSTATE 79 IN PENNSYLVANIA BETWEEN MILE MARKERS 50 AND 51...
  BETWEEN MILE MARKERS 27 AND 33...AND BETWEEN MILE MARKERS 40 AND 
  49.
 
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.

LAT...LON 4010 8021 4034 8026 4036 7978 4035 7959
      4019 7967 4004 7980 4005 7996 4006 8020

$$

24

1 follow-up statement

286 
WGUS71 KPBZ 162212 RRB
FFSPBZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
612 PM EDT THU JUN 16 2016

PAC003-051-125-129-162222-
/O.CAN.KPBZ.FF.W.0013.000000T0000Z-160616T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FAYETTE PA-WASHINGTON PA-ALLEGHENY PA-WESTMORELAND PA-
612 PM EDT THU JUN 16 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN FAYETTE...SOUTHEASTERN
WASHINGTON...SOUTHEASTERN ALLEGHENY AND SOUTHWESTERN WESTMORELAND
COUNTIES IS CANCELLED...

FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4010 8021 4034 8026 4036 7978 4035 7959
      4019 7967 4004 7980 4005 7996 4006 8020

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 9:26 PM EDT	Special Weather Statement	PBZ	Westmoreland	34 min
Jun 15, 9:27 PM EDT	Special Weather Statement	PBZ	Indiana	48 min
Jun 15, 9:32 PM EDT	Areal Flood Advisory	PBZ	Fayette, Greene	3 hr
Jun 16, 2:36 AM EDT	Special Weather Statement	PBZ	Indiana	84 min
Jun 16, 8:53 AM EDT	Special Weather Statement	PBZ	Mercer, Venango	67 min
Jun 16, 9:45 AM EDT	Special Weather Statement	PBZ	Venango	60 min
Jun 16, 9:56 AM EDT	Special Weather Statement	PBZ	Armstrong, Butler, Clarion	49 min
Jun 16, 10:13 AM EDT	Severe Thunderstorm Warning	PBZ	Greene, Washington	62 min
Jun 16, 10:24 AM EDT	Severe Thunderstorm Warning	PBZ	Armstrong, Clarion, Forest, Jefferson, Venango	66 min
Jun 16, 10:41 AM EDT	Special Weather Statement	PBZ	Indiana	34 min
Jun 16, 10:56 AM EDT	Special Weather Statement	PBZ	Greene	49 min
Jun 16, 11:02 AM EDT	Severe Thunderstorm Warning	PBZ	Indiana, Jefferson	28 min
Jun 16, 11:04 AM EDT	Special Weather Statement	PBZ	Westmoreland	26 min
Jun 16, 11:38 AM EDT	Areal Flood Advisory	PBZ	Armstrong, Clarion, Forest, Venango	2 hr
Jun 16, 11:42 AM EDT	Severe Thunderstorm Warning	PBZ	Greene	30 min
Jun 16, 12:14 PM EDT	Special Weather Statement	PBZ	Allegheny	46 min
Jun 16, 12:42 PM EDT	Special Weather Statement	PBZ	Beaver	33 min
Jun 16, 1:02 PM EDT	Special Weather Statement	PBZ	Armstrong	43 min
Jun 16, 3:07 PM EDT	Severe Thunderstorm Warning	PBZ	Washington	38 min
Jun 16, 3:23 PM EDT	Severe Thunderstorm Warning	PBZ	Beaver, Lawrence	52 min
Jun 16, 3:32 PM EDT	Areal Flood Advisory	PBZ	Allegheny, Washington, Westmoreland	3 hr
Jun 16, 3:34 PM EDT	Areal Flood Advisory	PBZ	Beaver	3 hr
Jun 16, 3:43 PM EDT	Severe Thunderstorm Warning	PBZ	Allegheny, Beaver, Washington	62 min
Jun 16, 3:49 PM EDT	Flash Flood Warning	PBZ	Allegheny, Westmoreland	3 hr
Jun 16, 3:55 PM EDT	Flash Flood Watch	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	11 hr
Jun 16, 3:57 PM EDT	Flash Flood Warning	PBZ	Allegheny, Beaver, Washington	4 hr
Jun 16, 4:16 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette, Greene, Washington, Westmoreland	44 min
Jun 16, 4:28 PM EDT	Flash Flood Warning	PBZ	Fayette, Greene, Washington	4 hr
Jun 16, 4:40 PM EDT	Flash Flood Warning	PBZ	Fayette, Westmoreland	4 hr
Jun 16, 4:43 PM EDT	Severe Thunderstorm Warning	PBZ	Fayette	62 min
Jun 16, 4:51 PM EDT	Tornado Warning	PBZ	Fayette	24 min
Jun 16, 5:09 PM EDT	Areal Flood Advisory	PBZ	Fayette	3 hr
Jun 16, 5:27 PM EDT	Areal Flood Advisory	PBZ	Westmoreland	2 hr
Jun 16, 6:15 PM EDT	Flash Flood Warning	PBZ	Clarion, Venango	6 hr
Jun 16, 6:49 PM EDT	Special Weather Statement	PBZ	Clarion	86 min
Jun 16, 7:59 PM EDT	Flash Flood Warning	PBZ	Clarion, Forest, Venango	3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2016 Every 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.