Alert archive / Pennsylvania / Flash Flood Warnings in 2011

Flash Flood Warning 30, NWS State College, PA

June 11, 2011Lancaster County, Lebanon County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 11, 2011, 7:53 PM EDT for Lancaster County, Lebanon County, Pennsylvania. It was in force for 3 hr. 1 report 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: Jun 11, 2011, 7:53 PM EDT (23:53 UTC)
Expired: Jun 11, 2011, 10:45 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

Counties Lancaster County, PA, Lebanon County, PA

The radar

The Dover AFB radar (KDOX), 157 km from the middle of the area, began a volume at 23:56 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
Jun 11, 9:58 PM EDT	FLASH FLOOD	Cleona, PA	WIND GUST 7...53 PM. QUITTAPHILA CREEK OUT OF BANKS AND OVER ROAD AT DAIRY RD. NUMEROUS ROADS FLOODED IN AREA

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

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.9 hours before the alert went out and 159 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: 175 J/kg
Mixed-layer CIN: -275 J/kg
Mixed-layer LCL: 1552 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 153 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.

988 
WGUS51 KCTP 112353
FFWCTP
PAC071-075-120245-
/O.NEW.KCTP.FF.W.0030.110611T2353Z-110612T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
753 PM EDT SAT JUN 11 2011

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LANCASTER COUNTY...
  SOUTHERN LEBANON COUNTY...

* UNTIL 1045 PM EDT...

* AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING FROM THUNDERSTORMS OVER LANCASTER AND               
  SOUTHERN LEBANON COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO AKRON...
  COLUMBIA...EAST PETERSBURG...ELIZABETHTOWN...EPHRATA...LANCASTER...
  LEOLA...LITITZ...MANHEIM...MILLERSVILLE...MOUNT JOY...NEW
  HOLLAND...WILLOW STREET...ANNVILLE...CORNWALL...LEBANON...MYERSTOWN
  AND PALMYRA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

&&

LAT...LON 4012 7591 4011 7593 4003 7593 3996 7599
      3991 7599 3990 7612 3989 7638 3996 7649
      4005 7654 4005 7662 4012 7671 4015 7670
      4020 7657 4033 7662 4038 7626 4014 7590

$$

FORECASTER: CHR

1 follow-up statement

428 
WGUS71 KCTP 120054
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
854 PM EDT SAT JUN 11 2011

PAC071-075-120245-
/O.CON.KCTP.FF.W.0030.000000T0000Z-110612T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LANCASTER PA-LEBANON PA-
854 PM EDT SAT JUN 11 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
SOUTHERN LEBANON AND LANCASTER COUNTIES...

AT 850 PM EDT...DOPPLER RADAR ESTIMATES CONTINUE TO INDICATE 
THUNDERSTORMS CAPABLE OF PRODUCING FLASH FLOODING OVER LANCASTER AND 
SOUTHERN LEBANON COUNTIES.

IN LANCASTER COUNTY WATERSHEDS PRONE TO FLOODING INCLUDE  CHICKIES 
AND LITTLE CHICKIES CREEK...MIDDLE CREEK...DONEGAL CREEK...AND 
FURNACE RUN.

IN SOUTHERN LEBANON COUNTY SOME WATERSHEDS PRONE TO FLOODING INCLUDE 
TULPEHOCKEN CREEK...SNITZ CREEK...QUITTAPAHILLA CREEK AND BECK CREEK.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO AKRON...
COLUMBIA...EAST PETERSBURG...ELIZABETHTOWN...EPHRATA...LANCASTER...
LEOLA...LITITZ...MANHEIM...MILLERSVILLE...MOUNT JOY...NEW HOLLAND...
WILLOW STREET...ANNVILLE...CORNWALL...LEBANON...MYERSTOWN AND
PALMYRA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE 
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS 
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN 
AUTOMOBILE. TURN AROUND DON'T DROWN!

LAT...LON 4012 7591 4011 7593 4003 7593 3996 7599
      3991 7599 3990 7612 3989 7638 3996 7649
      4005 7654 4005 7662 4012 7671 4015 7670
      4020 7657 4033 7662 4038 7626 4014 7590

$$

FORECASTER: CHR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 1:14 AM EDT	Special Weather Statement	CTP	Huntingdon	31 min
Jun 11, 2:39 AM EDT	Special Weather Statement	CTP	Lebanon	36 min
Jun 11, 3:22 AM EDT	Areal Flood Advisory	CTP	Centre, Clearfield	3 hr
Jun 11, 3:31 AM EDT	Areal Flood Advisory	CTP	Dauphin, Lancaster, Lebanon, Perry, Schuylkill	3 hr
Jun 11, 4:33 AM EDT	Special Weather Statement	CTP	Dauphin, Lebanon	42 min
Jun 11, 5:46 AM EDT	Special Weather Statement	CTP	Columbia, Lancaster, Lebanon, Montour, Northumberland, Schuylkill	44 min
Jun 11, 6:44 AM EDT	River Flood Warning	CTP	Dauphin, Lebanon, Schuylkill	8 hr
Jun 11, 6:44 AM EDT	River Flood Warning	CTP	Dauphin, Lebanon	8 hr
Jun 11, 10:46 AM EDT	Flash Flood Watch	CTP	Adams, Cumberland, Dauphin, Lancaster, Lebanon, Perry and 2 more	13 hr
Jun 11, 3:51 PM EDT	Special Weather Statement	CTP	Blair	54 min
Jun 11, 4:31 PM EDT	Special Weather Statement	CTP	Huntingdon	59 min
Jun 11, 4:37 PM EDT	Special Weather Statement	CTP	Clearfield	68 min
Jun 11, 4:42 PM EDT	Special Weather Statement	CTP	Huntingdon, Mifflin	63 min
Jun 11, 5:36 PM EDT	Special Weather Statement	CTP	Franklin	54 min
Jun 11, 5:46 PM EDT	Special Weather Statement	CTP	Fulton	44 min
Jun 11, 6:02 PM EDT	Special Weather Statement	CTP	Sullivan	43 min
Jun 11, 6:28 PM EDT	Special Weather Statement	CTP	Huntingdon	62 min
Jun 11, 6:41 PM EDT	Flash Flood Warning	CTP	Dauphin, Lebanon, Northumberland, Schuylkill	5 hr
Jun 11, 6:44 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lebanon	61 min
Jun 11, 6:53 PM EDT	Special Weather Statement	CTP	Lycoming	22 min
Jun 11, 6:58 PM EDT	Tornado Warning	CTP	Lebanon	47 min
Jun 11, 7:07 PM EDT	Special Weather Statement	CTP	Tioga	23 min
Jun 11, 7:15 PM EDT	Tornado Warning	CTP	Dauphin, Lebanon	45 min
Jun 11, 7:42 PM EDT	Severe Thunderstorm Warning	CTP	Dauphin, Lancaster, Lebanon, York	63 min
Jun 11, 7:42 PM EDT	Tornado Warning	CTP	Lancaster, Lebanon	48 min
Jun 11, 7:49 PM EDT	Tornado Warning	CTP	Lancaster, Lebanon	41 min
Jun 11, 7:52 PM EDT	Severe Thunderstorm Warning	CTP	Lancaster, York	68 min
Jun 11, 7:56 PM EDT	Tornado Warning	CTP	Lancaster, York	49 min

Nearby

Flash Flood Warnings in Pennsylvania, 2011 Every flash flood warning in 2011

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.