Alert archive / Pennsylvania / Flash Flood Warnings in 2001

Flash Flood Warning 4, NWS State College, PA

March 21, 20018 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Mar 21, 2001, 10:30 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, 10:30 AM EST (15:30 UTC)
Expired
Mar 21, 2001, 10:45 AM EST
In force
15 min
Issued by
NWS State College, PA
Area
Whole counties

Counties Bedford County, PA, Blair County, PA, Centre County, PA, Clinton County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 3.5 hours before the alert went out and 180 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 12:00Z on 2001-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2001-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 402 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
480 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
402 m²/s²
0-3 km storm-relative helicity
688 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 211530
FFWCTP
PAC057-013-061-087-009-027-067-035-211545-

FLASH FLOOD WARNING  THIS IS ONLY A TEST 
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1030 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...
  FULTON COUNTY.
  BLAIR COUNTY.
  HUNTINGDON COUNTY.
  MIFFLIN COUNTY.
  BEDFORD COUNTY.
  CENTRE COUNTY.
  JUNIATA COUNTY.
  CLINTON COUNTY.

* UNTIL 1045 AM EST.

* THE DRILL FLASH FLOOD WILL BE NEAR...
  BEDFORD AT 1035 AM.
  ALTOONA AT 1035 AM.
  HUNTINGDON AT 1040 AM.
  LEWISTOWN AT 1040 AM.
  STATE COLLEGE AT 1045 AM.
  MIFFLINTOWN AT 1045 AM.
  LOCK HAVEN AT 1045 AM.

* AT 1038 AM...A DRILL FLASH FLOOD WAS INDICATED WEST OF BEDFORD
  AND ALTOONA...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 AS PART OF PENNSYLVANIA WEATHER
AWARENESS WEEK AND IS ONLY A TEST.  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, 10:40 AM ESTFlash Flood WarningCTPLycoming, Montour, Northumberland, Potter, Snyder, Sullivan 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.