Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 180, NWS State College, PA

September 17, 1996McKean County, Pennsylvania

NWS State College, PA issued this flash flood warning at Sep 17, 1996, 7:10 PM EDT for McKean 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
Sep 17, 1996, 7:10 PM EDT (23:10 UTC)
Expired
Sep 17, 1996, 11:00 PM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

County McKean County, PA

The radar

The State College radar (KCCX), 109 km from the middle of the area, began a volume at 23:13 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 11.2 hours before the alert went out and 125 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 1996-09-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 20 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, Buffalo Intl Airport, NY at 12:00Z on 1996-09-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 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
20 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
534 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
23 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.

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Sep 17, 2:31 PM EDT, 4 hours 39 minutes earlier.

Area forecast discussion, Sep 17, 2:31 PM EDT, 4 hours 39 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
230 PM EDT TUE SEP 17 1996

PATCHY -RA/-DZ CONTINUES ACROSS REGION.

RAIN BECOMING MORE WIDESPREAD ACROSS NW PA AS A SHRTWV MOVES INTO
W SECTIONS OF THE STATE. DEEP WRAP ARND MOISTURE CONTINUES TO
ADVECT WESTWARD ACROSS CWA AS SFC LOW SPINS ALONG NJ COAST.

SPOTTY RAIN AND DRIZZLE WILL CONTINUE ACROSS THE CWA OVERNIGHT.
BOTH THE ETA/NGM GRADUALLY DRY THE FCST/A OUT ON WEDNESDAY AS HIGH
PRESSURE BUILDS IN. CLOUDY SKIES ON WED WITH SPOTTY LIGHT RAIN THEN
PARTIAL CLEARING DURING THE AFTERNOON. IT WILL ALSO BE WINDY ACROSS
E CWA AS GRADIENT FROM TO THE WEST AND LOW TO THE EAST COMBINE TO
PRODUCE BRISK NORTHWEST WI,NDS.

SKIES CLEAR WEDNESDAY NIGHT THEN SUNNY SKIES SHOULD PREVAIL ON
THURSDAY.

WINTHER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 17, 4:15 PM EDTFlash Flood WarningCTPWarren5 hr
Sep 17, 4:45 PM EDTFlash Flood WarningCTPPotter4 hr
Sep 17, 6:38 PM EDTFlash Flood WarningCTPLycoming4 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.