Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 49, NWS State College, PA

June 11, 1996Franklin County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 11, 1996, 8:38 PM EDT for Franklin 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: Jun 11, 1996, 8:38 PM EDT (00:38 UTC)
Expired: Jun 11, 1996, 11:45 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Whole counties

County Franklin County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.6 hours before the alert went out and 112 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1284 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCTP 120039
FFWCTP
PAC055-120345-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
838 PM EDT TUE JUN 11 1996
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1145 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...FRANKLIN COUNTY
 
AT 835 PM STATE COLLEGE DOPPLER RADAR SHOWED A STRONG SLOW MOVING
THUNDERSTORM OVER WESTERN FRANKLIN COUNTY JUST EAST OF FORT LOUDON.
RADAR ESTIMATES THAT MORE THAN 2 INCHES OF RAIN HAS FALLEN IN THE
LAST HOUR OVER A LARGE PART OF THE AREA.
 
IN ADDITION...MORE THUNDERSTORMS MOVING NORTHEAST OUT OF MARYLAND WILL
SPREAD ADDITIONAL HEAVY RAINS ACROSS THE REGION MAKING FLOODING LIKELY.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS 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.
 
LA CORTE/WINTHER
 
&

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 11, 8:13 PM EDT, 25 minutes earlier.

Area forecast discussion, Jun 11, 8:13 PM EDT, 25 minutes before

CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
815 PM EDT TUE JUN 11 1996

ACTIVE WX EVENING.....

SHRTWV/WEAK SFC LOW ACROSS NW PA WITH CONVERGENT BNDRY EXTENDING
INTO W-CENTRAL PA ATTM. RADAR TIME LAPSE INDICATES THIS AREA
GRADUALLY WEAKENING WITH TIME.

EARLIER...RADAR DETECTED A STRONGLY ROTATING CELL OVER BEDFORD CNTY
WITH GATE-TO-GATE SHEAR AT 40 KTS! NO REPORTS OF DAMAGE YET FOR
THIS CNTY.

MESOETA FCST 8H JET TO SLIDE INTO E PA LATER TONIGHT AND WEAKEN.
LACK OF TRIGGER ACROSS CENTRAL PA SHOULD ALLOW CONVECTION TO DIE
OFF BY MIDNIGHT.

FOR WEDNESDAY.... VERTICALLY STACKED LOW LIFTS NE AND FILLS...
BUT...CONVECTION SHOULD ONCE AGAIN FIRE-UP ACRO&SS CWA. EXPECT TRW
TO POP UP QUICKLY AS TEMPS AT 5H COOL SEVERAL DEG FROM TODAY.

WINTHER

In the hours before

Local storm report, Jun 11, 2:58 PM EDT, 5 hours 40 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
0300 PM EDT TUE JUN 11 1996

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

0230 PM    DIL2LSBURG                 PA   1.75 INCH HAIL
06/11/96   YORK                           GOLF-BALL SIZE HAIL

WIDENOR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 9:45 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	60 min
Jun 11, 10:10 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland	65 min
Jun 11, 11:40 PM EDT	Flash Flood Warning	CTP	Franklin	5 hr
Jun 12, 5:00 AM EDT	Flash Flood Warning	CTP	Franklin	6 hr
Jun 12, 10:50 AM EDT	Flash Flood Warning	CTP	Franklin	5 hr
Jun 12, 1:56 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	64 min
Jun 12, 4:13 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	62 min
Jun 12, 4:28 PM EDT	Flash Flood Warning	CTP	Lancaster	4 hr
Jun 12, 4:39 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster	66 min
Jun 12, 4:48 PM EDT	Flash Flood Warning	CTP	Cumberland	3 hr
Jun 12, 5:21 PM EDT	Severe Thunderstorm Warning	CTP	Northumberland, Snyder	69 min
Jun 12, 5:39 PM EDT	Flash Flood Warning	CTP	Juniata, Mifflin	66 min
Jun 12, 5:39 PM EDT	Severe Thunderstorm Warning	CTP	Juniata, Mifflin	66 min
Jun 12, 6:23 PM EDT	Severe Thunderstorm Warning	CTP	Perry	67 min

Nearby

Flash Flood Warnings in Pennsylvania, 1996 Every 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.