Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 30, NWS State College, PA

April 16, 1993Bradford County, Clinton County, Lycoming County, Pennsylvania

NWS State College, PA issued this flash flood warning at Apr 16, 1993, 5:15 PM EDT for Bradford County, Clinton County, Lycoming County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Apr 16, 1993, 5:15 PM EDT (21:15 UTC)
Expired
Apr 16, 1993, 10:15 PM EDT
In force
5 hr
Issued by
NWS State College, PA
Area
Whole counties

Counties Bradford County, PA, Clinton County, PA, Lycoming County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.3 hours before the alert went out and 212 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, Buffalo Intl Airport, NY at 12:00Z on 1993-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Buffalo Intl Airport, NY at 12:00Z on 1993-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
919 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
57 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.

In the hours before

Special weather statement, Apr 16, 1:11 PM EDT, 4 hours 4 minutes before
PAZ006-008-009-013-162000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA
110 PM EDT FRI APR 16 1993

...FLOOD WARNINGS FOR SMALL STREAMS IN EFFECT FOR ADAMS...CENTRE...FRANKLIN...
   AND HUNTINGDON COUNTIES UNTIL 430 PM...
...FLOOD WARNINGS FOR SMALL STREAMS IN EFFECT FOR CUMBERLAND...DAUPHIN...AND
   YORK COUNTIES UNTIL 515 PM...
...A FLOOD WATCH IS IN EFFECT FOR THE SOUTH CENTRAL MOUNTAINS...AND
   THE LOWER AND MIDDLE SUSQUEHANNA VALLEY UNTIL 1000 PM...
...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF EASTERN PENNSYLVANIA
   UNTIL 200 PM...

AT 100 PM HARRISBURG RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN OVER
YORK AND DAUPHIN COUNTIES.  THESE STORMS WERE PART OF A LARGE AREA OF SHOWERS
AND THUNDERSTORMS EXTENDING FROM NORTHEAST PENNSYLVANIA SOUTHEASTWARD TO
NORTHEAST VIRGINIA.  THE INDIVIDUAL STORMS WERE MOVING TOWARD THE NORTHEAST
AROUND 45 MILES AN HOUR WHILE THE ENTIRE AREA WAS MOVING TOWARD THE EAST
AROUND 20 MPH.

AT 1215 REPORTS WERE RECEIVED OF MINOR STREET FLOODING IN DAUPHIN...CENTRE...
AND CUMBERLAND COUNTIES.  ONE INCIDENT OF BASEMENT FLOODING WAS REPORTED
IN CUMBERLAND COUNTY.

IN HUNTINGDON COUNTY A FLOOD EMERGENCY WAS DECLARED FOR HUNTINGDON BOROUGH AND
THE MUDDY RUN WAS REPORTED TO BE OUT OF ITS BANKS.

IN FRANKLIN COUNTY ONE ROAD IN GREENE TOWNSHIP WAS CLOSED DUE TO FLOODING.

DO NOT ATTEMPT TO DRIVE OVER A FLOODED ROAD...ONLY 2 FEET OF WATER CAN SWEEP
YOU AND YOUR ChAR DOWNSTREAM.  DO NOT DRIVE AROUND POLICE BARRICADES.

STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL TV AND RADIO STATIONS FOR THE
LATEST STATEMENTS AND POSSIBLE WARNINGS.

MATUSIEWICZ
Special weather statement, Apr 16, 2:17 PM EDT, 2 hours 58 minutes before
PAZ007-008-014-162200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
220 PM EDT FRI APR 16 1993

...SEVERE THUNDERSTORM WATCH HAS EXPIRED...

AT 200 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED SHOWERS AND
THUNDERSTORMS COVERING MUCH OF EASTERN AND SECTIONS OF CENTRAL
PENNSYLVANIA.  THE IMMEDIATE THREAT FOR SEVERE WEATHER HAS ENDED
ACROSS NORTHCENTRAL PENNSYLVANIA AND THEREFORE THE SEVERE THUNDERSTORM
WATCH HAS EXPIRED.

HOWEVER...A COLD FRONT MOVING THROUGH WESTERN PENNSYLVANIA AT THIS
TIME IS EXPECTED TO CROSS THROUGH NORTHCENTRAL PENNSYLVANIA THIS
EVENING.  THIS COULD CAUSE SHOWERS AND THUNDERSTORMS TO REDEVELOP WITH
THE THREAT OF SEVERE WEATHER ONCE AGAIN.  STAY TUNED TO NOAA WEATHER
RADIO THROUGH THE AFTERNOON FOR FURTHER INFORMATION ON THIS SITUATION.

ANY ADDITIONAL RAINFALL WILL ADD TO THE ALREADY FULL CREEKS AND
STREAMS ACROSS THE REGION.

KJF/HM
Special weather statement, Apr 16, 2:53 PM EDT, 2 hours 22 minutes before
PAZ006-008-009-013-162200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA
250 PM EDT FRI APR 16 1993

...SEVERE THUNDERSTORM WATCH EXPIRED AT 2 PM...
...FLOOD WARNINGS FOR SMALL STREAMS IN EFFECT FOR ADAMS...CENTRE...FRANKLIN...
   AND HUNTINGDON COUNTIES UNTIL 430 PM...
...FLOOD WARNINGS FOR SMALL STREAMS IN EFFECT FOR CUMBERLAND...DAUPHIN...AND
   YORK COUNTIES UNTIL 515 PM...
...A FLOOD WATCH IS IN EFFECT FOR THE SOUTH CENTRAL MOUNTAINS...AND
   THE LOWER AND MIDDLE SUSQUEHANNA VALLEY UNTIL 1000 PM...
AT 230 PM HARRISBURG RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAIN OVER
SCHUYLKILL...BERKS...AND YORK COUNTIES.  THESE STORMS WERE PART OF A LARGE AREA
OF SHOWERS AND THUNDERSTORMS EXTENDING FROM NORTH CENTRAL AND NORTHEAST
PENNSYLVANIA SOUTHWARD TO NORTHEAST VIRGINIA AND SOUTHERN MARYLAND.  THE
INDIVIDUAL STORMS WERE MOVING TOWARD THE NORTHEAST AROUND 35 MILES AN HOUR WHILETHE ENTIRE AREA WAS MOVING TOWARD THE EAST AT 10 TO 20 MILES AN HOUR.

THE SEVERE THUNDERSTORM WATCH HAS EXPIRED FOR THE LOWER AND MIDDLE SUSQUEHANN
VALLEYS...HOWEVER...ATMOSPHERIC CONDITIONS ARE FAVORABLE FOR THE POSSIBILITY OF
MORE SEVERE THUNDERSTORM ACTIVITY LATER THIS AFTERNOON AND EVENING.

AS SEVERE STORMS MOVED THROUGH THE REGION THIS MORNING AND EARLY AFTERNOON A
ROOF WAS BLOWN OFF A MOBILE HOME IN CUMBERLAND COUNTY AND TREES AND WIRES WERE
DOWNED IN UNION COUNTY.  NUMEROUS FLOOD WARNINGS WERE ISSUED AND REMAIN IN
EFFECT FOR URBAN AND SMALL STREAM FLOODING CAUSED BY HEAVY RAINS ACROSS THE
REGION.

DO NOT ATTEMPT TO DRIVE OVER A FLOODED ROAD...ONLY 2 FEET OF WATER CAN SWEEP
YOU AND YOUR CAR DOWNSTREAM.  DO NOT DRIVE AROUND POLICE BARRICADES.

STAY TUNED TO NOAA WEAVTHER RADIO OR YOUR LOCAL TV AND RADIO STATIONS FOR THE
LATEST STATEMENTS AND POSSIBLE WARNINGS.

MATUSIEWICZ
Special weather statement, Apr 16, 4:33 PM EDT, 42 minutes before
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Special weather statement, Apr 16, 5:07 PM EDT, 8 minutes before
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Special weather statement, Apr 16, 5:10 PM EDT, 5 minutes before
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 6:33 AM EDTFlash Flood WarningCTPCentre3 hr
Apr 16, 6:54 AM EDTFlash Flood WarningCTPHuntingdon3 hr
Apr 16, 9:19 AM EDTSevere Thunderstorm WarningCTPCumberland56 min
Apr 16, 9:24 AM EDTFlash Flood WarningCTPFranklin7 hr
Apr 16, 9:30 AM EDTSevere Thunderstorm WarningCTPLycoming60 min
Apr 16, 9:45 AM EDTSevere Thunderstorm WarningCTPUnion60 min
Apr 16, 9:59 AM EDTSevere Thunderstorm WarningCTPBradford31 min
Apr 16, 10:15 AM EDTFlash Flood WarningCTPClinton4 hr
Apr 16, 10:15 AM EDTFlash Flood WarningCTPBradford4 hr
Apr 16, 11:25 AM EDTFlash Flood WarningCTPCumberland, Dauphin, York6 hr
Apr 16, 12:25 PM EDTFlash Flood WarningCTPTioga110 min
Apr 16, 1:56 PM EDTFlash Flood WarningCTPBradford, Clinton, Lycoming, Sullivan, Tioga4 hr
Apr 16, 3:55 PM EDTFlash Flood WarningCTPLancaster5 hr
Apr 16, 4:14 PM EDTFlash Flood WarningCTPFranklin, Huntingdon5 hr
Apr 16, 7:48 PM EDTSevere Thunderstorm WarningCTPFulton57 min

Nearby

Flash Flood Warnings in Pennsylvania, 1993Every flash flood warning in 1993

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.