Alert archive / Pennsylvania / Flash Flood Warnings in 1995

Flash Flood Warning 85, NWS Pittsburgh, PA

July 15, 1995Allegheny County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jul 15, 1995, 8:19 PM EDT for Allegheny County, Pennsylvania. It was in force for 116 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1995, 8:19 PM EDT (00:19 UTC)
Expired
Jul 15, 1995, 10:15 PM EDT
In force
116 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Allegheny County, PA

The radar

The Pittsburgh radar (KPBZ), 21 km from the middle of the area, began a volume at 00:23 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 0.3 hours before the alert went out and 12 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 1995-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2889 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 1995-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
2889 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
1586 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
-14 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIT 160023 COR
FFWPIT
PAC003-WVC093-160215-

BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE PITTSBURGH PA
822 PM EDT SAT JUL 15 1995

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL 1015 PM EDT
FOR THE FOLLOWING LOCATION...

IN WEST PENNSYLVANIA...ALLGHENY COUNTY

IN NORTHERN WEST VIRGINIA...TUCKER COUNTY.

WEATHER RADAR SHOWED REPEATED HEAVY DOWNPOURS CONTINUING OVER EASTERN
ALLEGHENY COUNTY IN THE MONROEVILLE AREA. FLASH FLOODING CAN OCCUR.
THIS STORM CONTINUES TO BUILD BACK TO THE WEST TOWARD PITTSBURGH.
DAMAGING WIND AND LARGE HAIL CAN ALSO OCCUR.
SEVERE STORMS WERE ALSO HEADING TOWARD ALLEGHENY COUNTY FROM BEAVER
COUNTY.

RADAR ALSO SHOWED SLOW MOVING SEVERE STORMS WITH VERY HEAVY RAIN OVER
SOUTHERN TUCKER COUNTY...ALSO CAPABLE OF CAUSING FLASH FLOODING...
BESIDES DAMAGING WIND AND LARGE HAIL.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND...DESTRUCTIVE HAIL...
DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR SAFETY GO TO AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR BUILDING. SEVERE THUNDERSTORMS CAN
PRODUCE TORNADOES WITH LITTLE ADVANCE WARNING. HEAVY RAINS CAN
QUICKLY CAUSE FLOODING. DO NOT CROSS WHERE WATER COVERS YOUR PATH.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 8:06 PM EDTFlash Flood WarningPBZBeaver, Lawrence2 hr
Jul 15, 8:06 PM EDTFlash Flood WarningPBZButler2 hr
Jul 15, 8:06 PM EDTSevere Thunderstorm WarningPBZBeaver, Butler, Lawrence2 hr
Jul 15, 8:19 PM EDTSevere Thunderstorm WarningPBZAllegheny116 min
Jul 15, 8:22 PM EDTSevere Thunderstorm WarningPBZAllegheny113 min
Jul 15, 8:30 PM EDTSevere Thunderstorm WarningPBZArmstrong, Clarion60 min
Jul 15, 8:59 PM EDTFlash Flood WarningPBZMercer2 hr
Jul 15, 8:59 PM EDTSevere Thunderstorm WarningPBZMercer2 hr
Jul 15, 9:07 PM EDTTornado WarningPBZButler, Venango53 min
Jul 15, 9:18 PM EDTSevere Thunderstorm WarningPBZIndiana42 min
Jul 15, 9:18 PM EDTSevere Thunderstorm WarningPBZWashington42 min
Jul 15, 9:28 PM EDTSevere Thunderstorm WarningPBZClarion, Forest62 min
Jul 15, 9:28 PM EDTSevere Thunderstorm WarningPBZArmstrong62 min
Jul 15, 9:50 PM EDTSevere Thunderstorm WarningPBZVenango40 min
Jul 15, 10:03 PM EDTSevere Thunderstorm WarningPBZIndiana, Westmoreland57 min
Jul 15, 10:10 PM EDTFlash Flood WarningPBZButler, Mercer2 hr
Jul 15, 10:20 PM EDTSevere Thunderstorm WarningPBZFayette, Greene, Washington55 min
Jul 15, 10:40 PM EDTFlash Flood WarningPBZVenango65 min
Jul 15, 10:40 PM EDTFlash Flood WarningPBZLawrence65 min
Jul 15, 10:55 PM EDTFlash Flood WarningPBZIndiana2 hr
Jul 15, 10:55 PM EDTFlash Flood WarningPBZFayette, Greene2 hr
Jul 15, 10:55 PM EDTSevere Thunderstorm WarningPBZFayette, Greene2 hr
Jul 15, 10:55 PM EDTSevere Thunderstorm WarningPBZIndiana2 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1995Every flash flood warning in 1995

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.