Alert archive / Pennsylvania / Flash Flood Warnings in 1998

Flash Flood Warning 49, NWS State College, PA

March 21, 1998Cumberland County, Perry County, York County, Pennsylvania

NWS State College, PA issued this flash flood warning at Mar 21, 1998, 9:40 AM EST for Cumberland County, Perry County, York County, Pennsylvania. It was in force for 5 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
Mar 21, 1998, 9:40 AM EST (14:40 UTC)
Expired
Mar 21, 1998, 3:00 PM EST
In force
5 hr
Issued by
NWS State College, PA
Area
Whole counties

Counties Cumberland County, PA, Perry County, PA, York County, PA

The radar

The State College radar (KCCX), 115 km from the middle of the area, began a volume at 14:42 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

Pittsburgh, PA (KPIT), launched 12:00Z, 2.7 hours before the alert went out and 257 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 12:00Z on 1998-03-21Temperature 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 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 12:00Z on 1998-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939Sfc1 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
498 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
51 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 20, 9:54 PM ESTFlash Flood WarningCTPFranklin6 hr
Mar 20, 11:29 PM ESTFlash Flood WarningCTPCumberland, Perry6 hr
Mar 20, 11:29 PM ESTFlash Flood WarningCTPAdams6 hr
Mar 21, 12:28 AM ESTFlash Flood WarningCTPJuniata, Snyder6 hr
Mar 21, 3:14 AM ESTFlash Flood WarningCTPLancaster, York6 hr
Mar 21, 3:43 AM ESTFlash Flood WarningCTPFranklin6 hr
Mar 21, 4:48 AM ESTFlash Flood WarningCTPJuniata, Perry, Snyder5 hr
Mar 21, 4:48 AM ESTFlash Flood WarningCTPAdams, Cumberland5 hr
Mar 21, 9:40 AM ESTFlash Flood WarningCTPLancaster5 hr
Mar 21, 9:53 AM ESTFlash Flood WarningCTPCumberland, Perry, York5 hr
Mar 21, 9:53 AM ESTFlash Flood WarningCTPLancaster5 hr
Mar 21, 11:42 AM ESTFlash Flood WarningCTPFranklin6 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1998Every flash flood warning in 1998

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.