Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 100, NWS State College, PA

June 24, 19964 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 24, 1996, 3:54 PM EDT for 4 counties in Pennsylvania. It was in force for 4 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
Jun 24, 1996, 3:54 PM EDT (19:54 UTC)
Expired
Jun 24, 1996, 8:00 PM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

Counties Bedford County, PA, Blair County, PA, Cambria County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 93 km from the middle of the area, began a volume at 19:53 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 7.9 hours before the alert went out and 179 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, Washington/Dulle, VA at 12:00Z on 1996-06-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Washington/Dulle, VA at 12:00Z on 1996-06-24The 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1076 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
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 24, 1:55 PM EDT, 1 hour 59 minutes earlier.

Area forecast discussion, Jun 24, 1:55 PM EDT, 1 hour 59 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
200 PM EDT MON JUN 24 1996

...SVR TSTM WATCH MOST OF CNTRL PA THIS AFTN/EVE FLASH FLOOD
WATCH CONTINUES...

MODELS SHOW TONGUE WARM MOIST UNSTABLE AIR OVER REGION THRU 7 PM
TONIGHT.  A LOW LEVEL WARM FRONT IS SLOWLY MVG NEWD ACROSS PA
THIS AFTN.  THE REMANENT CONVECTION FROM OVERNIGHT HAS REFIRED
OVER SERN PA WITH SOME SUPERCELL LOOKING CELLS OVER ADAMS WHICH
WAS MOVING INTO NRN MARYLAND.

SATELLITE IMAGERY HAS SHOWN WHAT APPEARS TO BE A BACK BUILDING
LINE MOVING ACROSS PA THIS AM INTO EARLY AFTN.  BACK BUILDING
LINES TYPICALLY PRODUCE SEVERE WEATHER AND FORM IN ENVIRONMENTS
SIMILAR TO THOSE WHICH PRODUCE SUPERCELLS.  FORTUNATELY...THE
MOST ACTIVE PART OF THE BACK BUILDING LINE IS PRESENTLY MOVING
OVER NRN MARYLAND.

HOWEVER...A COLD FRONT AND A TONGUE OF WARM MOIST AIR WILL MOVE
OVER THE STATE.  ANOTHER LINE WILL LIKELY FORM AND MOVE WEST TO
EAST ACROSS THE STATE.  MOISTURE...CONV...AND LL AGEO WINDS/CONV
OF...SUGGEST MOST SVRE TSTMS WILL FORM THIS AFTN.  LOOKS LIKE
BEST CHC WILL BE OVER SRN PORTIONS OF STATE.  EXTREMELY HIGH DEW
POINT AIR MVG IN BEHIND WARM FRONT SUGGEST THAT TORRENTIAL
RAINFALL IS POSSIBLE.

COLD FRONT AND DRIER AIR WILL MOVE OVER THE STATE EARLY TONIGHT.
MODELS SHOW INC IN WRLY FLOW AND SHARP DEC IN RH BY 00 UTC OVER
WRN SECTIONS.  BY MIDNIGHT VSBY SHOULD BE QUITE GOOD OVER WRN
THIRD OF STATE AND IMPROVING OVER CNTRL.  ANY FOG BEHIND TSTMS
ACTIVITY IN ERN SECTIONS WILL DISSIPATE OVERNIGHT...FOG SHOULD
GONE BE WELL BEFORE SUNRISE IN MOST LOCATIONS.  SHOULD BE A NICE
START TO TUES AS COOLER DRIER AIR MOVES OVER REGION.  MOS SHUD BE
CLOSE TO MAX TEMPS TUES.

GRUMM

In the hours before

Special weather statement, Jun 24, 11:56 AM EDT, 3 hours 58 minutes before
PAZ004-005-010>012-017>019-024>028-033>036-041-045-046-049>052-
056-057-063>065-242200-
SPECIAL WEATHER STATEMENT- SEVERE THUNDERSTORM WATCH
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1155 AM EDT MON JUN 24 1996

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 6 PM FOR
WARREN AND MCKEAN COUNTIES...
...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 2 PM FOR
MOST OF CENTRAL PENNSYLVANIA AND THE SUSQUEHANNA VALLEY...

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 6 PM FOR
WARREN AND MCKEAN COUNTIES.

A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 2 PM FOR THE
FOLLOWING COUNTIES IN CENTRAL PENNSYLVANIA AND THE SUSQUEHANNA VALLEY
REGION:

ELK... CAMERON... CLINTON...  LYCOMING... CLEARFIELD... CENTRE...

UNION... SNYDER... NORTHUMBERLAND... MONTOUR... CAMBRIA...

BLAIR... HUNTINGDON... MIFFLIN... JUNIATA... PERRY... DAUPHIN...

SOMERSET... BEDFORD... FULTON... FRANKLIN... CUMBERLAND... ADAMS

AND YORK.

A SEVERE THUNDERSTORM WATCRH MEANS THAT THUNDERSTORMS HAVE THE
POTENTIAL TO PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND HAIL 3/4
INCHES OR GREATER IN AND CLOSE TO THE WATCH AREA.

NICOSIA
Local storm report, Jun 24, 2:06 PM EDT, 1 hour 48 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
205 PM EDT MON JUN 24 1996

TIME EDT   ...CITY LOCATION..........ST   ...EVENT/REMARKS
           ...COUNTY LOCATION........

0145 PM    5 S. GETTYSBURG           PA   WIND DAMAGE
06/24/96   ADAMS                          CHIMNEY BLOWN OVER
                                          TREES DOWN TOP OF
                                          SILO BLOWN OFF

DUNHAM
Local storm report, Jun 24, 3:45 PM EDT, 9 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
345 PM EDT MON JUN 24 1996

TIME EDT   ...CITY LOCATION..........ST   ...EVENT/REMARKS
           ...COUNTY LOCATION........

0335 PM    JOHNSTOWN                 PA   WIND DAMAGE
06/24/96   CAMBRIA                        LARGE LIMBS DOWN
                                          WINDS TO 60 MPH.

DUNHAM

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 24, 12:12 PM EDTSevere Thunderstorm WarningCTPFranklin, Fulton63 min
Jun 24, 12:12 PM EDTSevere Thunderstorm WarningCTPCumberland63 min
Jun 24, 12:27 PM EDTFlash Flood WarningCTPBedford93 min
Jun 24, 12:27 PM EDTSevere Thunderstorm WarningCTPBedford93 min
Jun 24, 12:36 PM EDTSevere Thunderstorm WarningCTPAdams, York69 min
Jun 24, 3:05 PM EDTSevere Thunderstorm WarningCTPCambria, Somerset70 min
Jun 24, 3:25 PM EDTTornado WarningCTPCambria50 min
Jun 24, 3:50 PM EDTSevere Thunderstorm WarningCTPBedford, Blair70 min
Jun 24, 4:14 PM EDTSevere Thunderstorm WarningCTPSomerset61 min
Jun 24, 4:30 PM EDTSevere Thunderstorm WarningCTPFulton, Huntingdon60 min
Jun 24, 5:08 PM EDTSevere Thunderstorm WarningCTPFranklin67 min
Jun 24, 5:27 PM EDTSevere Thunderstorm WarningCTPAdams, Cumberland63 min
Jun 24, 5:54 PM EDTSevere Thunderstorm WarningCTPYork66 min
Jun 24, 6:46 PM EDTSevere Thunderstorm WarningCTPCumberland, Dauphin, Perry59 min
Jun 24, 7:59 PM EDTFlash Flood WarningCTPLebanon3 hr

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.