Alert archive / Pennsylvania / Flash Flood Warnings in 2011

Flash Flood Warning 67, NWS State College, PA

September 27, 201111 counties in Pennsylvania

NWS State College, PA issued this flash flood warning at Sep 27, 2011, 10:39 AM EDT for 11 counties in Pennsylvania. It was in force for 5 hr. 4 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
Sep 27, 2011, 10:39 AM EDT (14:39 UTC)
Expired
Sep 27, 2011, 3:30 PM EDT
In force
5 hr
Issued by
NWS State College, PA
Area
Storm-based polygon
Flood severity
None

Counties Bedford County, PA, Centre County, PA, Cumberland County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Mifflin County, PA, Perry County, PA, Snyder County, PA, Union County, PA

The radar

The State College radar (KCCX), 68 km from the middle of the area, began a volume at 14:39 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

TimeReportWhereRemark
Sep 27, 10:47 AM EDTFLASH FLOOD3 S Saxton, PAWATER AND DEBRIS OVER ROAD IN COALDALE
Sep 27, 10:55 AM EDTFLASH FLOODState College, PA1 FOOT OF WATER ON ATHERTON ST.
Sep 27, 11:50 AM EDTFLASH FLOODCassville, PASTRUCTURAL FLOODING REPORTED IN CASS TOWNSHIP
Sep 27, 2:12 PM EDTFLASH FLOODPort Royal, PAFLOODED BASEMENTS AND ROAD CLOSURES IN AND AROUND PORT ROYAL

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, 2.7 hours before the alert went out and 162 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 2011-09-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 456 joules per kilogram.LCLLFCEL10008507005003002001001 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, Phillips Aaf/Abe, MD at 12:00Z on 2011-09-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.1939Sfc1 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
456 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
107 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

052 
WGUS51 KCTP 271439
FFWCTP
PAC009-027-041-055-057-061-067-087-099-109-119-271730-
/O.NEW.KCTP.FF.W.0067.110927T1439Z-110927T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1039 AM EDT TUE SEP 27 2011

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN BEDFORD COUNTY...
  NORTHWESTERN CUMBERLAND COUNTY...
  NORTHERN FRANKLIN COUNTY...
  FULTON COUNTY...
  HUNTINGDON COUNTY...
  JUNIATA COUNTY...
  MIFFLIN COUNTY...
  PERRY COUNTY...
  WESTERN SNYDER COUNTY...
  SOUTHWESTERN UNION COUNTY...
  EASTERN CENTRE COUNTY...

* UNTIL 130 PM EDT...

* AT 1030 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  VERY HEAVY RAIN ACROSS A LARGE AREA OF CENTRAL PENNSYLVANIA. UP TO 
  TWO INCHES OF RAIN IS POSSIBLE IN A SHORT AMOUNT OF TIME. THIS     
  WILL LEAD TO FLASH FLOODING IN THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CARLISLE...
  BREEZEWOOD...HUNTINGDON...LEWISTOWN...BELLEFONTE AND STATE COLLEGE.

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 3981 7848 4108 7780 4101 7754 4096 7751
      4098 7743 4087 7708 4041 7701 4038 7703
      4036 7700 4027 7699 4011 7747 4001 7771
      3977 7815

$$

FORECASTER: CR
2 follow-up statements
150 
WGUS71 KCTP 271658
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1258 PM EDT TUE SEP 27 2011

PAC009-027-057-271708-
/O.CAN.KCTP.FF.W.0067.000000T0000Z-110927T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEDFORD PA-FULTON PA-CENTRE PA-
1258 PM EDT TUE SEP 27 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN CENTRE...
FULTON AND EASTERN BEDFORD COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BREEZEWOOD...
BELLEFONTE AND STATE COLLEGE.

LAT...LON 4001 7792 4006 7786 4010 7792 4076 7760
      4085 7736 4092 7727 4087 7708 4041 7701
      4038 7703 4035 7700 4027 7699 4009 7752
      3987 7798

$$

PAC041-055-061-067-087-099-109-119-271730-
/O.CON.KCTP.FF.W.0067.000000T0000Z-110927T1730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CUMBERLAND PA-FRANKLIN PA-HUNTINGDON PA-JUNIATA PA-MIFFLIN PA-
PERRY PA-SNYDER PA-UNION PA-
1258 PM EDT TUE SEP 27 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM EDT FOR
SOUTHWESTERN UNION...WESTERN SNYDER...PERRY...EASTERN MIFFLIN...
JUNIATA...SOUTHEASTERN HUNTINGDON...NORTHERN FRANKLIN AND
NORTHWESTERN CUMBERLAND COUNTIES...

AT 1254 PM EDT...DOPPLER RADAR ESTIMATES CONTINUE TO INDICATE A 
LARGE AREA OF MODERATE TO HEAVY RAINFALL CAPABLE OF PRODUCING FLASH 
FLOODING OVER EASTERN MIFFLIN...JUNIATA...NORTHERN 
FRANKLIN...NORTHWESTERN CUMBERLAND...PERRY...SOUTHEASTERN 
HUNTINGDON...SOUTHWESTERN UNION AND WESTERN SNYDER COUNTIES.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CARLISLE AND
LEWISTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

&&

LAT...LON 4001 7792 4006 7786 4010 7792 4076 7760
      4085 7736 4092 7727 4087 7708 4041 7701
      4038 7703 4035 7700 4027 7699 4009 7752
      3987 7798

$$

FORECASTER: CR
892 
WGUS51 KCTP 271727
FFWCTP
PAC041-055-061-067-087-099-109-119-271930-
/O.EXT.KCTP.FF.W.0067.000000T0000Z-110927T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
127 PM EDT TUE SEP 27 2011

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN CUMBERLAND COUNTY...
  NORTHERN FRANKLIN COUNTY...
  SOUTHEASTERN HUNTINGDON COUNTY...
  JUNIATA COUNTY...
  EASTERN MIFFLIN COUNTY...
  PERRY COUNTY...
  WESTERN SNYDER COUNTY...
  SOUTHWESTERN UNION COUNTY...

* UNTIL 330 PM EDT...

* AT 118 PM EDT...HEAVY RAINFALL CAPABLE OF PRODUCING FLASH FLOODING 
  CONTINUED ACROSS EASTERN MIFFLIN...JUNIATA...NORTHERN              
  FRANKLIN...NORTHWESTERN   CUMBERLAND...PERRY...SOUTHEASTERN        
  HUNTINGDON...SOUTHWESTERN UNION   AND WESTERN SNYDER COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CARLISLE
  AND LEWISTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. TURN AROUND...DON'T DROWN! NEVER TRY
TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE 
RISING WATER MOVE UP TO HIGHER GROUND.  TURN AROUND DON'T DROWN!

&&

LAT...LON 4001 7792 4006 7786 4010 7792 4076 7760
      4085 7736 4092 7727 4087 7708 4041 7701
      4038 7703 4035 7700 4027 7699 4009 7752
      3987 7798

$$

FORECASTER: CR

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 27, 4:03 AM EDTSpecial Weather StatementCTPSomerset42 min
Sep 27, 4:37 AM EDTSevere Thunderstorm WarningCTPBedford, Blair, Cambria, Somerset53 min
Sep 27, 5:32 AM EDTSpecial Weather StatementCTPBlair43 min
Sep 27, 6:09 AM EDTSpecial Weather StatementCTPBlair36 min
Sep 27, 6:18 AM EDTAreal Flood AdvisoryCTPCumberland, Perry3 hr
Sep 27, 6:21 AM EDTSevere Thunderstorm WarningCTPBlair, Huntingdon28 min
Sep 27, 7:32 AM EDTAreal Flood AdvisoryCTPAdams, York3 hr
Sep 27, 7:50 AM EDTSpecial Weather StatementCTPSnyder40 min
Sep 27, 7:59 AM EDTAreal Flood AdvisoryCTPSnyder3 hr
Sep 27, 8:12 AM EDTAreal Flood AdvisoryCTPClinton3 hr
Sep 27, 8:35 AM EDTFlash Flood WarningCTPAdams, York115 min
Sep 27, 8:37 AM EDTFlash Flood WarningCTPClinton4 hr
Sep 27, 9:05 AM EDTAreal Flood AdvisoryCTPBlair, Huntingdon115 min
Sep 27, 9:12 AM EDTFlash Flood WatchCTPAdams, Bedford, Blair, Cambria, Cameron, Centre and 27 more40 hr
Sep 27, 9:53 AM EDTAreal Flood AdvisoryCTPCentre, Huntingdon112 min
Sep 27, 10:17 AM EDTSpecial Weather StatementCTPHuntingdon, Mifflin28 min
Sep 27, 10:19 AM EDTSpecial Weather StatementCTPCentre26 min
Sep 27, 11:37 AM EDTSpecial Weather StatementCTPUnion38 min
Sep 27, 1:03 PM EDTFlash Flood WarningCTPColumbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 1 more4 hr
Sep 27, 1:10 PM EDTFlash Flood WarningCTPFranklin2 hr
Sep 27, 2:36 PM EDTSpecial Weather StatementCTPFranklin54 min
Sep 27, 2:53 PM EDTFlash Flood WarningCTPAdams, Cumberland, Franklin, York2 hr
Sep 27, 3:31 PM EDTAreal Flood WarningCTPAdams, Bedford, Centre, Cumberland, Dauphin, Franklin and 8 more6 hr
Sep 27, 3:43 PM EDTFlash Flood WarningCTPCumberland, Dauphin, Lebanon, Northumberland, Schuylkill, York3 hr
Sep 27, 3:56 PM EDTSpecial Weather StatementCTPDauphin, Northumberland64 min
Sep 27, 4:13 PM EDTSpecial Weather StatementCTPFulton62 min
Sep 27, 4:56 PM EDTFlash Flood WarningCTPColumbia, Lebanon, Schuylkill3 hr
Sep 27, 4:57 PM EDTAreal Flood WarningCTPMontour, Northumberland, Snyder, Union5 hr
Sep 27, 4:59 PM EDTSpecial Weather StatementCTPLebanon61 min
Sep 27, 5:06 PM EDTAreal Flood AdvisoryCTPMontour, Northumberland, Snyder, Union4 hr
Sep 27, 5:14 PM EDTAreal Flood AdvisoryCTPColumbia, Lycoming, Montour, Northumberland, Snyder, Sullivan and 1 more4 hr
Sep 27, 5:32 PM EDTRiver Flood WarningCTPHuntingdon3 hr
Sep 27, 5:35 PM EDTSpecial Weather StatementCTPLebanon55 min
Sep 27, 5:57 PM EDTSpecial Weather StatementCTPFulton63 min
Sep 27, 6:33 PM EDTSpecial Weather StatementCTPLebanon27 min
Sep 27, 7:05 PM EDTSpecial Weather StatementCTPLebanon, Schuylkill25 min
Sep 27, 7:41 PM EDTSpecial Weather StatementCTPAdams34 min
Sep 27, 7:56 PM EDTFlash Flood WarningCTPColumbia, Dauphin, Lebanon, Montour, Northumberland, Schuylkill2 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2011Every 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.