Alert archive / Pennsylvania / Flash Flood Warnings in 1989

Flash Flood Warning 3, NWS State College, PA

June 16, 1989Centre County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 16, 1989, 10:53 PM EDT for Centre County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 1989, 10:53 PM EDT (02:53 UTC)
Expired
Jun 17, 1989, 4:00 AM EDT
In force
5 hr
Issued by
NWS State College, PA
Area
Whole counties

County Centre County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 2.9 hours before the alert went out and 200 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 1989-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 127 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 1989-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
127 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
718 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
-15 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 KHAR 170256
FFWHAR
PAC027-170700-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
1053 PM EDT FRI JUN 16 1989
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL  400 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN CENTRAL PENNSYLVANIA
          ...CENTRE
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A FLASH FLOOD
WARNING FOR SMALL CREEKS AND STREAMS IN CENTRE COUNTY UNTIL 4 AM EDT
SATURDAY MORNING.
 
STATE POLICE IN STATE COLLEGE REPORT MANY STREAMS NOW COMING OUT OF
THEIR BANKS.
 
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FL
OODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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, Jun 16, 5:31 PM EDT, 5 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
530 PM EDT    FRI  JUN 16 1989

...SEVERE THUNDERSTORM WATCH FOR LANCASTER AND YORK COUNTIES...
...HEAVY THUNDERSTORMS MOVING THROUGH WESTE
Special weather statement, Jun 16, 6:00 PM EDT, 4 hours 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
600 PM EDT    FRI  JUN 16 1989

...SEVERE THUNDERSTORM WATCH FOR LANCASTER AND YORK COUNTIES...
...HEAVY THUNDERSTORM MOVING THROUGH EASTERN LANCASTER COUNTY...

AT 555 PM RADAR SHOWED A VERY THUNDERSTORM ABOUT 15 MILES NORTHEAST
OF THE CITY OF LANCASTER. IT WILL BE MOVING INTO SOUTHERN BERKS COUNTY
IN THE NEXT 15 TO 20 MINUTES.

THIS THUNDERSTORM COULD PRODUCE FREQUENT LIGHTNING...S"TRONG GUSTY WINDS
...HAIL AND HEAVY DOWNPOURS.

THE STORM WAS MOVING NORTHEAST AROUND 40 TO 45 MPH.

WSO HAR JORDAN
Special weather statement, Jun 16, 8:07 PM EDT, 2 hours 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
805 PM EDT    FRI  JUN 16 1989

...SEVERE THUNDERSTORM WATCH FOR YORK AND LANCASTER COUNTIES HAS BEEN
CANCELLED...
...SMALL STREAM AND URBAN FLOOD WATCH REMAINS IN EFFECT FOR LANCASTER
COUNTY...

SOME HEAVY THUNDERSTORMS MOVED THROUGH THE LOWER SUSQUEHANNA VALLEY LATE
THIS AFTERNOON AND EARLY THIS EVENING BUT NO DAMAGE HAS BEEN REPORTED.
SOME AREAS DID RECEIVE HEAVY DOWNPOURS.

SHOWERS AND THUNDERSTORMS REMAIN IN THE FORECAST OVERNIGHT BUT NONE
ARE EXPECTED TO BE SEVERE.

WSO HAR JORDAN
Local storm report, Jun 16, 8:19 PM EDT, 2 hours 34 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE HARRISBURG PA.
ISSUED 815 PM EDT   FRI  JUN 161989

....... UPDATE ON TORNADO EVENT OF THURSDAY JUN 15 1989...

A SURVEY TEAM WAS IN THE AREA DURING TODAY. THEY INDICATED THAT THE
FIRST TOUCHDOWN OF THE TORNADO OCCURRED IN AND AROUND THE HALLAM AREA
OF EASTERN YORK COUNTY. THE TIME WAS BETWEEN 605 AND 615 PM. SEVERAL
HOMES W
       ERE DAMAGED OR DESTROYED. AROUND 630 PM THE TORNADO DID DAMAGE
TO THE EAST OF HALLAM...NEAR THE SUSQUEHANNA RIVER.

SURVEY TEAM REPORTED A HOPSCOTCH TYPE PATH OF AROUND 15 MILES...BEGINNING
NEAR HALLAM IN EASTERN YORK COUNTY AND ENDING IN MANOR TOWNSHIP..LANCASTER
COUNTY..ABOUT 5 MILES EAST OF MILLERSVILLE.

AVERAGE WIDTH WAS AROUND 100 YARDS.
SO FAR 7 INJURIES HAVE BEEN REPORTED WITH NONE SERIOUS. NO DEATHS REPORTED.

THERE WERE NUMEROUS HOMES DAMAGED OR DESTROYED IN EASTERN YORK
AND WESTERN LANCASTER COUNTIES.

END
WSO HAR CURLL
Special weather statement, Jun 16, 9:28 PM EDT, 1 hour 25 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
 930 PM EDT    FRI  JUN 16 1989

 ...FLASH FLOOD WATCH FOR PORTIONS OF THE SOUTHCENTRAL MOUNTAINS
    UNTIL 6AM SATURDAY MORNING...

THE NATIONAL WEATHER SERVICE IN PITTSBURGH PA HAS ISSUED A FLASH
FLOOD WATCH FOR FULTON..FRANKLIN..HUNTINGTON...CENTRE...MIFFLIN
AND JUNIATA COUNTIES UNTIL 6AM SATURDAY MORNING.

LOCALLY HEAVY RAINS FALLING ON ALREADY SATURATED GROUND MAY CAUSE
SMALL STREAMS AND CREEKS IN THESE COUNTIES TO OVERFLOW. PERSONS
LIVING NEAR SMALL CREEKS AND STREAMS SHOULD KEEP ALERT AND IF HEAVY
RAINS OCCUR...SHOULD PREPARE TO MOVE TO HIGHER GROUND IF FLOODING
BEGINS.

END
WSO HAR CURLL

x
Special weather statement, Jun 16, 10:18 PM EDT, 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
1020PM  EDT    FRI  JUN 16 1989

 ...FLASH FLOOD WATCH FOR FULTON...FRANKLIN...HUNTINGTON...CENTRE...
    MIFFLIN AND JUNIATA COUNTIES UNTIL 6AM SATURDAY MORNING...

AT 10 15 PM EDT THE HARRISBURG WEATHER RADR WAS OBSERVING A CLUSTER
OF HEAVY RAIN SHOWERS THAT EXTENDED FROM WESTERN FRANKLIN COUNTY...
NORTH THROUGH EASTERN AREAS OF HUNTINGTON COUNTY INTO CENTRE COUNTY
NEAR STATE COLLEGE. ADDITIONAL HEAVY SHOWERS WERE ALSO NOTED NEAR
MILROY IN MIFFLIN COUNTY.

THESE SHOWERS WERE MOVING TO THE NORTHEAST AT AROUND 30 MILES AN HOUR.

RESIDENTS OF THE ABOVE MENTIONED COUNTIES SHOULD KEEP ALERT FOR POSSIBLE
FLOODING SHOULD HEAVY RAINS PREVAIL FOR A PROLONGED PERIOD OF TIME.

END
WSO HAR CURLL

Nearby

Flash Flood Warnings in Pennsylvania, 1989Every flash flood warning in 1989

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.