Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 128, NWS State College, PA

August 8, 1996Somerset County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 8, 1996, 6:13 PM EDT for Somerset County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 8, 1996, 6:13 PM EDT (22:13 UTC)
Expired
Aug 8, 1996, 9:15 PM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Somerset County, PA

The radar

The Pittsburgh radar (KPBZ), 119 km from the middle of the area, began a volume at 22:13 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.2 hours before the alert went out and 257 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, Phillips Aaf/Abe, MD at 12:00Z on 1996-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 81 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, Phillips Aaf/Abe, MD at 12:00Z on 1996-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
81 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
703 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
31 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 KCTP 082212
FFWCTP
PAC111-090115-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
613 PM EDT THU AUG 8 1996
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  915 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...SOMERSET COUNTY
 
DOPPLER RADAR IN STATE COLLEGE CONTINUES TO SHOW SLOW MOVING
THUNDERSTORMS OVER SOMERSET COUNTY. THE STRONGEST STORMS WERE OVER THE
NORTHEASTERN PORTION OF THE COUNTY AT 6 PM. RAINFALL ESTIMATES OF 2
INCHES HAVE BEEN COMPUTED NEAR MEYERSDALE AND NEAR BUCKSTOWN. ANOTHER
LINE OF THUNDERSTORMS TO THE WEST WILL PRODUCE ADDITIONAL RAINFALL
LATER THIS EVENING. FLOODING IS POSSIBLE IN AREAS BENEATH THESE STORMS.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
GRUMM

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Aug 8, 1:46 PM EDT, 4 hours 27 minutes earlier.

Area forecast discussion, Aug 8, 1:46 PM EDT, 4 hours 27 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
145 PM EDT THU AUG 8 1996

...ZONE SUGGESTIONS...
...PIT...NO SIG CHANGES.
...PHL...WUD BE MORE PESSIMISTIC FRI...ESP LOWER SUSQ

...DISCUSSION...
CONVECTION ERUPTING ON SCHEDULE AS HIGH THETA-E AIR AND SFC TROF
APPROACH FROM THE OHIO VALLEY. ONLY QUESTION IS HOW MUCH CAN
ATMOSPHERE REBOUND IN LIEU OF LEADING SQUALL LINE MOVING EAST
ACROSS NRN ZONES NOW. ADAP SHOWS LI'S AS LOW AS -10 NOSING IN FROM
WEST. MODELS CONTINUE TO PUMP BIG PRECIP WATERS INTO LOCAL AREA AS
SFC FRONT SLIDES EAST. SO FAR SEVERE SIGNATURES HARD TO COME BY
WITH ONLY THE OCNL HIGH VIL. STORMS SHOWING SOME TENDENCY FOR
ROTATION IN PLACES BUT WINDS OFF RADAR REFLECT WEAK ATMOSPHERIC
FLOW.

FFA MAY HAVE TO BE EXTENDED LATER PENDING LATEST DEVELOPMENTS. WITH
BEST DYNAMICS YET TO COME OVERNIGHT...AND FEATURES MOVING INTO
DECELERATING FLOW THE DANGER IS FOR SLOW MOVING DOWNPOURS TO BEGIN
CAUSING FLOODING PROBLEMS.

DRY AIR SHUD BE SLOW TO MOVE EAST INTO PHL ZONES. WUD KEEP CLOUDY
SHOWERY CONDITIONS OVER ERN ZONES THRU AT LEAST A FRI AM HOURS...
POSSIBLY EVEN MOST OF DAY OVER LOWER SUSQ.

LA CORTE

In the hours before

Special weather statement, Aug 8, 3:35 PM EDT, 2 hours 38 minutes before
PAZ004>006-010>012-017>019-024>026-033>035-037-041-045-090200-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
328 PM EDT THU AUG 8 1996

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNITL 10 PM FOR THE
FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA:

WARREN    MCKEAN         ELK            CLINTON
CAMERON   CENTRE         CLEARFIELD     LYCOMING
SULLIVAN  TIOGA          BEDFORD        BLAIR
CAMBRIA   HUNTINGDON     SOMERSET       POTTER

AN APPROACHING COLD FRONT AND THE FLOW OF WARM MOIST AIR AHEAD OF
THIS FRONT WILL PRODUCE THUNDERSTORMS OVER MOST OF PENNSYLVANIA
THIS EVENING AND EARLY TONIGHT.  SOME OF THE THUNDERSTORMS WILL
PRODUCE LOCALLY HEAVY RAINS...HAIL AND DAMAGING WINDS.

STAY TUNED TO THE WEATHER CHANNEL...NOAA WEATHER RADIO OR YOUR
FAVORITE TV OR RADIO STATION FOR POSSIBLE SEVERE THUNDERSTORM
WARNINGS.

GRUMM
Special weather statement, Aug 8, 5:59 PM EDT, 14 minutes before
PAZ004>006-010>012-017>019-024>026-033>035-037-041-045-090200-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
600 PM EDT THU AUG 8 1996

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM FOR THE
FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA:

SOUTHERN CLINTON   CENTRE         CLEARFIELD     SOUTHERN LYCOMING
BEDFORD            BLAIR          CAMBRIA        HUNTINGDON
SOMERSET

THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED FOR THE FOLLOWING
COUNTIES:

NORTHERN CLINTON   MCKEAN         POTTER         NORTHERN LYCOMING
ELK                CAMERON        TIOGA          WARREN
SULLIVAN

AN APPROACHING COLD FRONT AND THE FLOW OF WARM MOIST AIR AHEAD OF
THIS FRONT WILL PRODUCE THUNDERSTORMS OVER MOST OF PENNSYLVANIA
THIS EVENING AND EARLY TONIGHT.  SOME OF THE THUNDERSTORMS WILL
PRODUCE LOCALLY HEAVY RAINS...HAIL AND DAMAGING WINDS.

STAY TUNED TO THE WEATHER CHANNEL...NOAA WEATHER RADIO OR YOUR
FAVORITE TV OR RADIO STATION FOR POSSIBLE SEVERE THUNDERSTORM
WARNINGS.

WIDENOR/NICOSIA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 12:54 PM EDTSevere Thunderstorm WarningCTPPotter66 min
Aug 8, 1:57 PM EDTSevere Thunderstorm WarningCTPWarren63 min
Aug 8, 2:01 PM EDTFlash Flood WarningCTPWarren4 hr
Aug 8, 2:45 PM EDTSevere Thunderstorm WarningCTPElk, McKean60 min
Aug 8, 4:16 PM EDTSevere Thunderstorm WarningCTPCentre, Clearfield59 min
Aug 8, 5:01 PM EDTFlash Flood WarningCTPBlair, Clearfield3 hr
Aug 8, 5:16 PM EDTSevere Thunderstorm WarningCTPSomerset59 min
Aug 8, 5:58 PM EDTSevere Thunderstorm WarningCTPBlair, Cambria62 min

Nearby

Flash Flood Warnings in Pennsylvania, 1996Every flash flood warning in 1996

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.