Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 185, NWS State College, PA

October 19, 1996Lancaster County, Pennsylvania

NWS State College, PA issued this flash flood warning at Oct 19, 1996, 2:58 AM EDT for Lancaster County, 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
Oct 19, 1996, 2:58 AM EDT (06:58 UTC)
Expired
Oct 19, 1996, 7:00 AM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

County Lancaster County, PA

The radar

The Dover AFB radar (KDOX), 152 km from the middle of the area, began a volume at 07:01 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 00:00Z, 7.0 hours before the alert went out and 157 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 00:00Z on 1996-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 466 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 1996-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 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
466 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCTP 190701
FFWCTP
PAC071-191100-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
258 AM EDT SAT OCT 19 1996
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLOOD WARNING FOR SMALL STREAMS AND CREEKS AS WELL AS POOR DRAINAGE
AREAS EFFECTIVE UNTIL 700 AM EDT FOR PEOPLE IN THE FOLLOWING
LOCATIONS...
 
IN  PENNSYLVANIA
 
   ...LANCASTER COUNTY
 
EARLY THIS SATURDAY MORNING... DOPPLER WEATHER RADAR CONTINUES TO SHOW
RAIN... OCCASIONALLY HEAVY... MOVING ACROSS LANCASTER COUNTY. COUNTY EMA
OFFICIALS REPORT SEVERAL ROADS CLOSED.
 
MAY POST OFFICE ROAD AT HILLTOP ROAD IN STRASBURG TOWNSHIP IS CLOSED DUE
TO WATER FROM A NEARBY CREEK OVERFLOWING ITS BANKS.  SHARP RISES HAVE
ALSO BEEN NOTED ON OTHER AREA STREAMS AND CREEKS IN THE COUNTY...
AND ADDITIONAL FLOODING IS LIKELY OVERNIGHT.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS.  IF FLOODING IS OBSERVED...ACHT QUICKLY.
MOVE UP TO ESCAPE FLOOD WATERS.  DO NOT STAY IN AREAS SUBJECT
TO FLOODING WHEN WATER BEGINS RISING.
 
JUNG
 
&

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 Oct 18, 7:47 PM EDT, 7 hours 11 minutes earlier.

Area forecast discussion, Oct 18, 7:47 PM EDT, 7 hours 11 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
745 PM EDT FRI OCT 18 1996

...CURRENT ZNS OK FOR NOW...

...DISC. SIT. WITH SPC.  STILL GETTING A FEW REPORTS OF DAMAGE
OVER C PA...BUT ACTIVITY LOOKS LIKE IT STILL WEAKENING.  MOST
REPORTS AND ESTIMATES BETWEEN 40 AND 45 MPH...FEW NEAR 49 MPH.

BAND OF HEAVY RAIN STILL MOVING EAST...SECOND BATCH OF RAIN WEST
OF CTP...BUT WHILE SOME HEAVY RAIN WITH THIS WESTERN BAND...THIS
BAND IS IN THE COLD AIR...AND PATTERN OF DBZ AROUND RDA INDICATES
THAT SOME BRIGHT BANDING IS OCCURRING.  DISC. SIT. WITH MARFC.

CURRENT FLOOD WATCH IS OK...THINK HIGHEST THREAT OF SIG. RAIN
WILL BE FROM NE PA N AND E...BUT STILL TOO CLOSE TO CALL YET.

THEREFORE CURRENT WATCH/ZNS OK FOR NOW...PIT/PHL CALL IF YOU
THINK SIG CHANGES ARE NEEDED.

MARTIN

In the hours before

Local storm report, Oct 18, 10:19 PM EDT, 4 hours 39 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1015 PM EDT FRI OCT 19 1996

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

0530  PM   BEDFORD                   PA   WIND DAMAGE
10/18/96   BEDFORD                        TREES AND POWER LINES
                                          DOWN RTE 220/30

0545  PM   JOHNSTOWN                 PA   WIND DAMAGE
10/18/96   CAMBRIA                        TREES DOWN JUST EAST
                                          OF JST

0645  PM   STATE COLLEGE             PA   WIND DAMAGE
10/18/96   CENTRE                         TREE LIMBS DOWN

0650  PM   CROMWELL                  PA   WIND DAMAGE
10/18/96   HUNTINGDON                     TREES DOWN

0700  PM   MIFFLINTOWN               PA   WIND DAMAGE
10/18/96   JUNIATA                        TREES DOWN MUDDY RUN
                                          ROAD AND RTE 35

0700  PM   AMBERSON TWP              PA   WIND DAMAGE
10/18/96   FRANKLIN                       TREES DOWN ON AMBERSON
                                          MTN

0704  PM   ALEXANDRIA                PA   WIND DAMAGE
10/18/96   HUNTINGDON                     TREES DOWN

0710  PM   LEWISTOWN                 PA   WIND DAMAGE
10/18/96   MIFFLIN                        TREES AND POWERLINES
                                          DOWN LEWISTOWN

0715  PM   RENOVO                    PA   WIND DAMAGE
10/18/96   CLINTON                        TREES DOWN

0715  PM   LOCKHAVEN                 PA   WIND DAMAGE
10/18/96   CLINTON                        TREES DOWN

0730  PM   HOPEWELL                  PA   WIND DAMAGE
10/18/96   CUMBERLAND                     TREES DOWN

0735  PM   GETTYSBURG                PA   WIND DAMAGE
10/18/96   ADAMS                          TREES AND POWERLINES
                                          DOWN MOMETSBURG RD

0740  PM   HAMPTON                   PA   WIND DAMAGE
10/18/96   CUMBERLAND                     TREES DOWN

0745  PM   SHIPENSBURG               PA   WIND DAMAGE
10/18/96   CUMBERLAND                     TREES DOWN

0800  PM   NEW BLOOMSBURG            PA   WIND DAMAGE
10/18/96   PERRY                          TREES DOWN

0830  PM   SELINSGROVE               PA   WIND DAMAGE
10/18/96   SNYDER                         TREES DOWN
                        "
0830  PM   MC CLURE                  PA   WIND DAMAGE
10/18/96   SNYDER                         TREES DOWN

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 19, 6:20 AM EDTFlash Flood WarningCTPSchuylkill6 hr
Oct 19, 6:51 AM EDTFlash Flood WarningCTPLancaster5 hr
Oct 19, 10:51 AM EDTFlash Flood WarningCTPFranklin, Huntingdon4 hr
Oct 19, 12:25 PM EDTFlash Flood WarningCTPSchuylkill6 hr
Oct 19, 2:48 PM EDTFlash Flood WarningCTPHuntingdon6 hr
Oct 19, 6:50 PM EDTFlash Flood WarningCTPSchuylkill3 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.