Alert archive / Pennsylvania / Flash Flood Warnings in 2012

Flash Flood Warning 19, NWS State College, PA

September 6, 2012Lycoming County, Tioga County, Pennsylvania

NWS State College, PA issued this flash flood warning at Sep 6, 2012, 5:07 PM EDT for Lycoming County, Tioga County, Pennsylvania. It was in force for 6 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
Sep 6, 2012, 5:07 PM EDT (21:07 UTC)
Expired
Sep 6, 2012, 11:00 PM EDT
In force
6 hr
Issued by
NWS State College, PA
Area
Storm-based polygon
Flood severity
None

Counties Lycoming County, PA, Tioga County, PA

The radar

The State College radar (KCCX), 90 km from the middle of the area, began a volume at 21:07 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 6, 6:05 PM EDTFLASH FLOOD5 S Morris, PAROADS FLOODED
Sep 6, 6:05 PM EDTFLASH FLOOD5 Sw Morris, PART 414 CLOSED FLOODED

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

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 9.1 hours before the alert went out and 188 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, Buffalo Intl Airport, NY at 12:00Z on 2012-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1594 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Buffalo Intl Airport, NY at 12:00Z on 2012-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 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
1594 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
693 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.9
Supercell composite
4.8

Open this sounding in Storm Lab

The text

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

991 
WGUS51 KCTP 062107
FFWCTP
PAC081-117-070000-
/O.NEW.KCTP.FF.W.0019.120906T2107Z-120907T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
507 PM EDT THU SEP 6 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL TIOGA COUNTY...
  NORTH CENTRAL LYCOMING COUNTY...

* UNTIL 800 PM EDT...

* AT 458 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS SHOWING 
  NEARLY STATIONARY THUNDERSTORMS WITH VERY HEAVY RAIN OVER NORTH    
  CENTRAL LYCOMING AND SOUTH CENTRAL TIOGA COUNTIES. THE HEAVIEST    
  RAIN HAS FALLEN NEAR THE LYCOMING COUNTY LINE SOUTH OF MORRIS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BUTTONWOOD.

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 4163 7747 4155 7710 4146 7716 4156 7751

$$

FORECASTER: KF
1 follow-up statement
030 
WGUS51 KCTP 062341
FFWCTP
PAC081-117-070300-
/O.EXT.KCTP.FF.W.0019.000000T0000Z-120907T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
741 PM EDT THU SEP 6 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL TIOGA COUNTY...
  NORTH CENTRAL LYCOMING COUNTY...

* UNTIL 1100 PM EDT...

* AT 731 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH     
  FLOODING FROM NEARLY STATIONARY THUNDERSTORMS OVER NORTH CENTRAL   
  LYCOMING AND SOUTH CENTRAL TIOGA COUNTIES. THE THUNDERSTORMS       
  SHOULD MOVE OUT OF THE AREA BY AROUND 9 PM. HOWEVER...RESIDUAL     
  FLOODING IS LIKELY TO LAST THROUGH 11 PM. 

* THE HARDEST HIT LOCATION IS THE RURAL AREA SOUTH OF MORRIS AND     
  WEST OF BUTTONWOOD.

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!

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4163 7747 4155 7710 4146 7716 4156 7751

$$

FORECASTER: KF

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 3:14 PM EDTSpecial Weather StatementCTPMcKean31 min
Sep 6, 3:29 PM EDTSpecial Weather StatementCTPUnion31 min
Sep 6, 3:31 PM EDTSpecial Weather StatementCTPLycoming44 min
Sep 6, 3:49 PM EDTSpecial Weather StatementCTPSullivan41 min
Sep 6, 4:11 PM EDTAreal Flood AdvisoryCTPLycoming, Tioga3 hr
Sep 6, 4:22 PM EDTSpecial Weather StatementCTPLycoming23 min
Sep 6, 4:24 PM EDTSpecial Weather StatementCTPMifflin36 min
Sep 6, 4:29 PM EDTSpecial Weather StatementCTPSullivan46 min
Sep 6, 4:58 PM EDTSpecial Weather StatementCTPWarren62 min
Sep 6, 5:02 PM EDTSpecial Weather StatementCTPLycoming28 min
Sep 6, 5:10 PM EDTSpecial Weather StatementCTPMifflin35 min
Sep 6, 5:22 PM EDTSpecial Weather StatementCTPMontour, Northumberland, Union38 min
Sep 6, 5:24 PM EDTSpecial Weather StatementCTPTioga66 min
Sep 6, 5:39 PM EDTSpecial Weather StatementCTPFulton36 min
Sep 6, 5:47 PM EDTSevere Thunderstorm WarningCTPCentre, Clinton, Snyder, Union58 min
Sep 6, 5:59 PM EDTSpecial Weather StatementCTPMcKean31 min
Sep 6, 6:11 PM EDTSpecial Weather StatementCTPTioga34 min
Sep 6, 6:17 PM EDTSpecial Weather StatementCTPLycoming28 min
Sep 6, 6:30 PM EDTSpecial Weather StatementCTPPotter45 min
Sep 6, 6:44 PM EDTSpecial Weather StatementCTPNorthumberland, Union31 min
Sep 6, 6:48 PM EDTSpecial Weather StatementCTPLycoming42 min
Sep 6, 7:02 PM EDTSpecial Weather StatementCTPUnion28 min
Sep 6, 7:04 PM EDTSpecial Weather StatementCTPElk41 min
Sep 6, 7:07 PM EDTSpecial Weather StatementCTPSullivan23 min
Sep 6, 7:49 PM EDTSpecial Weather StatementCTPLycoming, Montour56 min
Sep 6, 7:56 PM EDTSpecial Weather StatementCTPCameron64 min
Sep 6, 7:58 PM EDTSpecial Weather StatementCTPSullivan47 min

Nearby

Flash Flood Warnings in Pennsylvania, 2012Every 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.