Alert archive / Pennsylvania / Flash Flood Warnings in 2012

Flash Flood Warning 7, NWS State College, PA

May 29, 20125 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at May 29, 2012, 5:37 PM EDT for 5 counties in Pennsylvania. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 29, 2012, 5:37 PM EDT (21:37 UTC)
Expired: May 29, 2012, 8:30 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Cumberland County, PA, Dauphin County, PA, Lebanon County, PA, Perry County, PA, Schuylkill County, PA

The radar

The State College radar (KCCX), 131 km from the middle of the area, began a volume at 21:37 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.

What was reported inside it

Time	Report	Where	Remark
May 29, 7:39 PM EDT	FLASH FLOOD	Carlisle, PA	SEVERAL ROADS CLOSED
May 29, 7:41 PM EDT	FLASH FLOOD	Harrisburg, PA	A COUPLE ROADS FLOODED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.6 hours before the alert went out and 107 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 667 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: -10 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.

805 
WGUS51 KCTP 292137
FFWCTP
PAC041-043-075-099-107-300030-
/O.NEW.KCTP.FF.W.0007.120529T2137Z-120530T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
537 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CUMBERLAND COUNTY...
  DAUPHIN COUNTY...
  NORTHERN LEBANON COUNTY...
  SOUTHEASTERN PERRY COUNTY...
  SCHUYLKILL COUNTY...

* UNTIL 830 PM EDT...

* AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES
  AND RAIN GAGE REPORTS INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM
  OVER CUMBERLAND...DAUPHIN...NORTHERN LEBANON...SCHUYLKILL AND
  SOUTHEASTERN PERRY COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CAMP
  HILL...CARLISLE...ENOLA...LEMOYNE...LOWER ALLEN...MECHANICSBURG...
  NEW CUMBERLAND...SHIPPENSBURG...PALMYRA...COLONIAL PARK...
  HARRISBURG...HERSHEY...HUMMELSTOWN...LINGLESTOWN...MIDDLETOWN...
  PROGRESS...STEELTON...FRACKVILLE...MAHANOY CITY...MINERSVILLE...
  POTTSVILLE...SCHUYLKILL HAVEN...ST. CLAIR AND TAMAQUA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 4064 7598 4057 7601 4049 7642 4041 7630
      4030 7659 4017 7667 4017 7675 4022 7690
      4020 7693 4016 7691 4015 7703 4005 7717
      3999 7740 3995 7747 4019 7761 4091 7598
      4074 7576

$$

FORECASTER: KF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 11:38 AM EDT	Special Weather Statement	CTP	Warren	67 min
May 29, 11:47 AM EDT	Severe Thunderstorm Warning	CTP	Warren	58 min
May 29, 12:20 PM EDT	Special Weather Statement	CTP	Warren	25 min
May 29, 12:48 PM EDT	Special Weather Statement	CTP	Warren	27 min
May 29, 1:13 PM EDT	Special Weather Statement	CTP	Potter	47 min
May 29, 1:21 PM EDT	Special Weather Statement	CTP	Clinton	24 min
May 29, 1:22 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clearfield, Elk	53 min
May 29, 1:28 PM EDT	Special Weather Statement	CTP	McKean	32 min
May 29, 1:32 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	43 min
May 29, 1:36 PM EDT	Severe Thunderstorm Warning	CTP	McKean, Potter	69 min
May 29, 1:58 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon, Mifflin	62 min
May 29, 2:07 PM EDT	Severe Thunderstorm Warning	CTP	Cameron, Clinton, Elk, Potter	38 min
May 29, 2:12 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Clearfield, Elk	63 min
May 29, 2:17 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	58 min
May 29, 2:29 PM EDT	Special Weather Statement	CTP	Huntingdon	31 min
May 29, 2:43 PM EDT	Severe Thunderstorm Warning	CTP	Clinton, Lycoming, Potter	62 min
May 29, 3:06 PM EDT	Severe Thunderstorm Warning	CTP	Centre, Huntingdon, Juniata, Mifflin, Perry, Snyder and 1 more	39 min
May 29, 3:09 PM EDT	Special Weather Statement	CTP	Sullivan	36 min
May 29, 3:13 PM EDT	Severe Thunderstorm Warning	CTP	Tioga	32 min
May 29, 3:16 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair, Centre, Clinton, Fulton, Huntingdon and 2 more	44 min
May 29, 3:19 PM EDT	Special Weather Statement	CTP	Schuylkill	41 min
May 29, 3:28 PM EDT	Special Weather Statement	CTP	Lycoming	32 min
May 29, 3:36 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan, Tioga	54 min
May 29, 3:43 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Dauphin, Juniata, Montour, Northumberland, Perry and 3 more	77 min
May 29, 3:55 PM EDT	Severe Thunderstorm Warning	CTP	Bedford, Centre, Clinton, Franklin, Fulton, Huntingdon and 5 more	65 min
May 29, 4:26 PM EDT	Severe Thunderstorm Warning	CTP	Columbia, Lycoming, Sullivan	34 min
May 29, 4:30 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Franklin, Perry, York	45 min
May 29, 5:03 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Perry and 2 more	72 min
May 29, 5:15 PM EDT	Areal Flood Advisory	CTP	Cumberland, Dauphin, Franklin, Lebanon, Schuylkill	3 hr
May 29, 5:23 PM EDT	Severe Thunderstorm Warning	CTP	Schuylkill	43 min
May 29, 5:48 PM EDT	Severe Thunderstorm Warning	CTP	Adams, Lancaster, Lebanon, York	72 min

Nearby

Flash Flood Warnings in Pennsylvania, 2012 Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.