Alert archive / Pennsylvania / Flash Flood Warnings in 2001

Flash Flood Warning 5, NWS State College, PA

March 21, 20018 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Mar 21, 2001, 10:40 AM EST for 8 counties in Pennsylvania. It was in force for 15 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 21, 2001, 10:40 AM EST (15:40 UTC)
Expired
Mar 21, 2001, 10:55 AM EST
In force
15 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Lycoming County, PA, Montour County, PA, Northumberland County, PA, Potter County, PA, Snyder County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 3.7 hours before the alert went out and 212 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 2001-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 2001-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 339 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
503 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
339 m²/s²
0-3 km storm-relative helicity
576 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 211540
FFWCTP
PAC105-109-117-093-081-113-119-097-211555-

FLASH FLOOD WARNING  THIS IS ONLY A TEST 
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1040 AM EST WED MAR 21 2001

           *** 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...
  POTTER COUNTY.
  TIOGA COUNTY.
  LYCOMING COUNTY.
  SULLIVAN COUNTY.
  MONTOUR COUNTY.
  UNION COUNTY.
  NORTHUMBERLAND COUNTY.
  SNYDER COUNTY.

* UNTIL 1055 AM EST.

* THE DRILL FLASH FLOOD WILL BE NEAR...
  COUDERSPORT AT 1045 AM.
  WELLSBORO AT 1045 AM.
  WILLIAMSPORT AT 1045 AM.
  LAPORTE AT 1045 AM.
  DANVILLE AT 1050 AM.
  MILTON AT 1050 AM.
  LEWISBURG AT 1050 AM.
  SELINSGROVE AT 1050 AM.

* AT 1038 AM...A DRILL FLASH FLOOD WAS INDICATED WEST OF
  COUDERSPORT...WELLSBORO AND WILLIAMSPORT...BY NATIONAL WEATHER
  SERVICE DOPPLER RADAR.  THIS IS ONLY A DRILL.

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 21, 10:30 AM ESTFlash Flood WarningCTPBedford, Blair, Centre, Clinton, Fulton, Huntingdon and 2 more15 min
Mar 21, 10:50 AM ESTFlash Flood WarningCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 2 more10 min

Nearby

Flash Flood Warnings in Pennsylvania, 2001Every flash flood warning in 2001

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.