Alert archive / Pennsylvania / Flash Flood Warnings in 1997

Flash Flood Warning 46, NWS State College, PA

November 7, 1997Adams County, Cumberland County, Pennsylvania

NWS State College, PA issued this flash flood warning at Nov 7, 1997, 9:37 PM EST for Adams County, Cumberland County, Pennsylvania. It was in force for 6 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
Nov 7, 1997, 9:37 PM EST (02:37 UTC)
Expired
Nov 8, 1997, 3:45 AM EST
In force
6 hr
Issued by
NWS State College, PA
Area
Whole counties

Counties Adams County, PA, Cumberland County, PA

The radar

The Sterling radar (KLWX), 118 km from the middle of the area, began a volume at 02:38 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, 2.6 hours before the alert went out and 120 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 1997-11-08Temperature 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 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 1997-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 392 square meters per square second.19395878Sfc1 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
514 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
392 m²/s²
0-3 km storm-relative helicity
563 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 Nov 7, 5:46 PM EST, 3 hours 51 minutes earlier.

Area forecast discussion, Nov 7, 5:46 PM EST, 3 hours 51 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
545 PM EST FRI NOV 7 1997

...ZONE SUGGESTIONS...

PIT/PHL...SEE BELOW.

...DISCUSSION...

WILL GET THIS OUT EARLY.  SEVERAL REPORTS OF 2 TO 3 INCHES OF
RAIN...WITH MINOR FLOODING.

USE RADAR DATA WITH CAUTION.

SENT OUT QPS...BASED ON HEAVY RAIN ROTATING AND LIFTING NORTHWARD
THROUGH SAT AFT.  RFC/S ADJUST AS YOU SEE FIT.

WSFO/S...CALL IF SIG. CHANGES..*.MAIN THING...LETS KEEP IT SIMPLE.

MARTIN

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 7, 9:37 PM ESTFlash Flood WarningCTPCameron, Clearfield6 hr
Nov 7, 9:37 PM ESTFlash Flood WarningCTPBedford, Fulton6 hr
Nov 7, 9:37 PM ESTFlash Flood WarningCTPFranklin6 hr
Nov 7, 9:37 PM ESTFlash Flood WarningCTPCambria, Somerset6 hr
Nov 7, 9:37 PM ESTFlash Flood WarningCTPBlair, Huntingdon6 hr
Nov 8, 12:48 AM ESTFlash Flood WarningCTPPerry3 hr
Nov 8, 3:40 AM ESTFlash Flood WarningCTPBedford, Blair, Cambria, Clearfield, Huntingdon5 hr
Nov 8, 3:40 AM ESTFlash Flood WarningCTPAdams, Cumberland, Franklin, Fulton, Perry5 hr
Nov 8, 3:40 AM ESTFlash Flood WarningCTPSomerset5 hr
Nov 8, 5:22 AM ESTFlash Flood WarningCTPLancaster4 hr
Nov 8, 8:55 AM ESTFlash Flood WarningCTPFranklin, Fulton, Huntingdon2 hr
Nov 8, 8:55 AM ESTFlash Flood WarningCTPBlair, Cambria, Clearfield2 hr
Nov 8, 8:55 AM ESTFlash Flood WarningCTPBedford, Somerset2 hr
Nov 8, 10:50 AM ESTFlash Flood WarningCTPBedford, Blair, Cambria, Clearfield3 hr
Nov 8, 10:50 AM ESTFlash Flood WarningCTPFulton, Huntingdon3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1997Every flash flood warning in 1997

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.