Alert archive / Pennsylvania / Flash Flood Warnings in 2002

Flash Flood Warning 12, NWS State College, PA

March 20, 20028 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Mar 20, 2002, 10:50 AM EST for 8 counties in Pennsylvania. It was in force for 10 min. 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 20, 2002, 10:50 AM EST (15:50 UTC)
Expired
Mar 20, 2002, 11:00 AM EST
In force
10 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Lancaster County, PA, Lebanon County, PA, Perry County, PA, York County, PA

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 3.8 hours before the alert went out and 104 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, Phillips Aaf/Abe, MD at 12:00Z on 2002-03-20Temperature 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, Phillips Aaf/Abe, MD at 12:00Z on 2002-03-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 380 square meters per square second.1939587897117Sfc1 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
429 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
380 m²/s²
0-3 km storm-relative helicity
933 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KCTP 201550
FFWCTP
PAC075-043-041-099-001-055-071-133-201600-

FLASH FLOOD WARNING  THIS IS ONLY A TEST 
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1050 AM EST WED MAR 20 2002

           *** THIS MESSAGE IS FOR TEST PURPOSES ONLY ***
     * NO SEVERE WEATHER IS OCCURRING IN THE MENTIONED AREA *

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* DRILL FLASH FLOOD WARNING FOR...
  DAUPHIN COUNTY.
  PERRY COUNTY.
  LEBANON COUNTY.
  CUMBERLAND COUNTY.
  FRANKLIN COUNTY.
  ADAMS COUNTY.
  YORK COUNTY.
  LANCASTER COUNTY.
  
* UNTIL 1100 AM EST.

* AT 1042 AM...A DRILL FLASH FLOOD WAS INDICATED BY NATIONAL WEATHER
  SERVICE DOPPLER RADAR WEST OF NEW BLOOMFIELD...CHAMBERSBURG AND
  CARLISLE. THE FLOOD WATERS WILL MOVE TO THE EAST AT 40 MPH.
  THIS IS ONLY A DRILL.

* THE DRILL FLASH FLOOD WILL BE NEAR...
  NEW BLOOMFIELD...CHAMBERSBURG AND CARLISLE AT 1052 AM.
  HARRISBURG AND GETTYSBURG AT 1054 AM.
  LEBANON...YORK AND LANCASTER AT 1056 AM.

IF THIS WERE AN ACTUAL WARNING...WE WOULD PROVIDE DETAILS OF DAMAGE
AND SUGGEST SAFE LOCATIONS AS SHELTER.

AGAIN...THIS IS A DRILL FLASH FLOOD WARNING.  NO FLOODING IS 
OCCURRING AT THIS TIME.
$$

ONDREJIK

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 20, 10:30 AM ESTFlash Flood WarningCTPBedford, Blair, Centre, Clinton, Fulton, Huntingdon and 2 more15 min
Mar 20, 10:40 AM ESTFlash Flood WarningCTPLycoming, Montour, Northumberland, Potter, Snyder, Sullivan and 2 more15 min

Nearby

Flash Flood Warnings in Pennsylvania, 2002Every flash flood warning in 2002

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.