Alert archive / Pennsylvania / Flash Flood Warnings in 2012
Flash Flood Warning 21, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 18, 2012, 2:00 PM EDT for 7 counties in Pennsylvania. It was in force for 5 hr. 3 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 18, 2012, 2:00 PM EDT (18:00 UTC)
- Expired
- Sep 18, 2012, 7:15 PM EDT
- In force
- 5 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Adams County, PA, Cumberland County, PA, Dauphin County, PA, Lancaster County, PA, Lebanon County, PA, Schuylkill County, PA, York County, PA
The radar
The State College radar (KCCX), 140 km from the middle of the area, began a volume at 18:01 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 |
|---|---|---|---|
| Sep 18, 4:00 PM EDT | FLASH FLOOD | 2 Sw York, PA | FLOODING ON CODORUS CREEK. INDIAN ROCK DAM ROAD CLOSED. |
| Sep 18, 4:00 PM EDT | FLASH FLOOD | 4 E New Ringgold, PA | FLOODING AND ROAD CLOSURES IN WEST PENN TOWNSHIP ESPECIALLY IN THE AREA OF ROUTE 895 AND DORSET ROAD. |
| Sep 18, 4:00 PM EDT | FLASH FLOOD | Dover, PA | CONEWAGO CREEK FLOODING. 15-20 MOBILE HOMES EVACUATED AT ROUTE 74 AND PINE ROAD. |
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, 6.0 hours before the alert went out and 104 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.
- Mixed-layer CAPE
- 330 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 519 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 275 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
369
WGUS51 KCTP 181800
FFWCTP
PAC001-041-043-071-075-107-133-182145-
/O.NEW.KCTP.FF.W.0021.120918T1800Z-120918T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
200 PM EDT TUE SEP 18 2012
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EASTERN ADAMS COUNTY...
EASTERN CUMBERLAND COUNTY...
SOUTHERN DAUPHIN COUNTY...
NORTHWESTERN LANCASTER COUNTY...
LEBANON COUNTY...
SCHUYLKILL COUNTY...
YORK COUNTY...
* UNTIL 545 PM EDT...
* AT 148 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES
AND RAIN GAGE REPORTS INDICATED HEAVY RAINFALL OF OVER 2 INCHES IN
THE PAST 3 HOURS ACROSS THE REGION. ADDITIONAL VERY HEAVY RAIN
FROM TRAINING SHOWERS AND THUNDERSTORMS OVER THE NEXT FEW HOURS
WILL LIKELY LEAD TO OF FLASH FLOODING THROUGHOUT URBAN AREAS AND
ALONG SMALLER STREAMS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
DALLASTOWN...HANOVER...RED LION...YORK...AKRON...COLUMBIA...
ELIZABETHTOWN... EPHRATA...LANCASTER...LITITZ...MANHEIM...
MILLERSVILLE...MOUNT JOY...CAMP HILL...MECHANICSBURG...
NEW CUMBERLAND...ANNVILLE...LEBANON...MYERSTOWN...
PALMYRA...HARRISBURG...HERSHEY...LINGLESTOWN...MIDDLETOWN...
STEELTON...FRACKVILLE... MAHANOY CITY...MINERSVILLE...
POTTSVILLE...SCHUYLKILL HAVEN...SHENANDOAH...AND TAMAQUA.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE LIKELY BETWEEN 2
AND 4 PM THIS AFTERNOON.
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.
&&
LAT...LON 3972 7722 4009 7720 4025 7707 4029 7696
4049 7670 4094 7615 4091 7599 4073 7576
4064 7598 4057 7601 4049 7643 4028 7609
3972 7659
$$
FORECASTER: LAMBERT/JUNG4 follow-up statements
258
WGUS71 KCTP 181926
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
326 PM EDT TUE SEP 18 2012
PAC001-041-043-071-075-107-133-182145-
/O.CON.KCTP.FF.W.0021.000000T0000Z-120918T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS PA-CUMBERLAND PA-DAUPHIN PA-LANCASTER PA-LEBANON PA-
SCHUYLKILL PA-YORK PA-
326 PM EDT TUE SEP 18 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR
YORK...SCHUYLKILL...LEBANON...NORTHWESTERN LANCASTER...SOUTHERN
DAUPHIN...EASTERN CUMBERLAND AND EASTERN ADAMS COUNTIES...
AT 324 PM EDT...DOPPLER RADAR ESTIMATES AND RAIN GAGE REPORTS
CONTINUE TO INDICATE HEAVY RAIN FALLING ACROSS THE WARNED
AREA...WITH WIDESPREAD FLOODING OF ROADS ACROSS WESTERN YORK COUNTY.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DALLASTOWN...
HANOVER...PARKVILLE...RED LION...SPRY...WEIGELSTOWN...YORK...AKRON...
COLUMBIA...EAST PETERSBURG...ELIZABETHTOWN...EPHRATA...LITITZ...
MANHEIM...MILLERSVILLE...MOUNT JOY...CAMP HILL...ENOLA...LEMOYNE...
LOWER ALLEN...MECHANICSBURG...NEW CUMBERLAND...ANNVILLE...CORNWALL...
LEBANON...MYERSTOWN...PALMYRA...COLONIAL PARK...HARRISBURG...
HERSHEY...HUMMELSTOWN...LINGLESTOWN...MIDDLETOWN...PROGRESS...
STEELTON...FRACKVILLE...MAHANOY CITY...MINERSVILLE...POTTSVILLE...
SCHUYLKILL HAVEN...SHENANDOAH...ST. CLAIR AND TAMAQUA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 3972 7722 4009 7720 4025 7707 4029 7696
4049 7670 4094 7615 4091 7599 4073 7576
4064 7598 4057 7601 4049 7643 4028 7609
3972 7659
$$
FORECASTER: CR395
WGUS71 KCTP 182130
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
530 PM EDT TUE SEP 18 2012
PAC041-182134-
/O.CAN.KCTP.FF.W.0021.000000T0000Z-120918T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CUMBERLAND PA-
530 PM EDT TUE SEP 18 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EASTERN CUMBERLAND
COUNTY...
THE WATERS FROM THE EARLIER HEAVY RAINS OVER CUMBERLAND COUNTY 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 CAMP HILL...
ENOLA...LEMOYNE...LOWER ALLEN...MECHANICSBURG AND NEW CUMBERLAND.
LAT...LON 4003 7720 4015 7703 4016 7691 4020 7693
4023 7686 4028 7692 4032 7691 4094 7615
4091 7599 4073 7576 4064 7598 4057 7601
4049 7643 4028 7609 3972 7659 3972 7722
$$
PAC001-043-071-075-107-133-182145-
/O.CON.KCTP.FF.W.0021.000000T0000Z-120918T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS PA-DAUPHIN PA-LANCASTER PA-LEBANON PA-SCHUYLKILL PA-YORK PA-
530 PM EDT TUE SEP 18 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR
YORK...SCHUYLKILL...LEBANON...NORTHWESTERN LANCASTER...SOUTHERN
DAUPHIN AND EASTERN ADAMS COUNTIES...
AT 521 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUE TO REPORT
LOCALIZED FLOODING ACROSS MUCH OF THE AREA. HOWEVER...THE WATER
APPEARS TO BE CRESTING OR EVEN GOING DOWN IN MANY LOCATIONS. SINCE
FLOODING IS ON-GOING...EXPECT THIS WARNING TO BE EXTENDED SHORTLY.
SOME LOCATIONS WHERE FLOODING CONTINUES...DOVER TOWNSHIP YORK
COUNTY...WEST PENN TOWNSHIP IN SCHUYLKILL COUNTY...AS WELL AS
PORTIONS OF DAUPHIN AND ADAMS COUNTIES WHERE SOME ROADS HAVE BEEN
CLOSED DUE TO HIGH WATER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
&&
LAT...LON 4003 7720 4015 7703 4016 7691 4020 7693
4023 7686 4028 7692 4032 7691 4094 7615
4091 7599 4073 7576 4064 7598 4057 7601
4049 7643 4028 7609 3972 7659 3972 7722
$$
FORECASTER: DANGELO392
WGUS51 KCTP 182137
FFWCTP
PAC001-043-071-075-107-133-182315-
/O.EXT.KCTP.FF.W.0021.000000T0000Z-120918T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
537 PM EDT TUE SEP 18 2012
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
EASTERN ADAMS COUNTY...
SOUTHERN DAUPHIN COUNTY...
NORTHWESTERN LANCASTER COUNTY...
LEBANON COUNTY...
SCHUYLKILL COUNTY...
YORK COUNTY...
* UNTIL 715 PM EDT...
* AT 530 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO REPORT
LOCALIZED FLOODING ACROSS MUCH OF THE AREA. HOWEVER...THE WATER
APPEARS TO BE CRESTING OR EVEN GOING DOWN IN MANY LOCATIONS.
* SOME LOCATIONS WHERE FLOODING CONTINUES...DOVER TOWNSHIP YORK
COUNTY...WEST PENN TOWNSHIP IN SCHUYLKILL COUNTY...AS WELL AS
PORTIONS OF DAUPHIN AND ADAMS COUNTIES WHERE SOME ROADS HAVE BEEN
CLOSED DUE TO HIGH WATER.
ANY ADDITIONAL RAINFALL SHOULD BE VERY LIGHT AND PATCHY. NO NEW
AREAS OF FLOODING ARE EXPECTED TO OCCUR THIS EVENING. THE WATER
SHOULD RECEDE THROUGH THE EVENING.
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.
&&
LAT...LON 4003 7720 4015 7703 4016 7691 4020 7693
4023 7686 4028 7692 4032 7691 4094 7615
4091 7599 4073 7576 4064 7598 4057 7601
4049 7643 4028 7609 3972 7659 3972 7722
$$
FORECASTER: DANGELO345
WGUS71 KCTP 182315
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
715 PM EDT TUE SEP 18 2012
PAC001-043-071-075-107-133-182323-
/O.EXP.KCTP.FF.W.0021.000000T0000Z-120918T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS PA-DAUPHIN PA-LANCASTER PA-LEBANON PA-SCHUYLKILL PA-YORK PA-
715 PM EDT TUE SEP 18 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 715 PM EDT FOR YORK...
SCHUYLKILL...LEBANON...NORTHWESTERN LANCASTER...SOUTHERN DAUPHIN AND
EASTERN ADAMS COUNTIES...
THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING IN MOST
LOCATIONS. A FEW ROADS ARE STILL CLOSED...BUT NO NEW AREAS HAVE
BEGUN TO FLOOD FOR AN HOUR OR TWO SINCE THE HEAVY RAIN TAPERED OFF.
THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
HOWEVER...IT IS IMPORTANT TO CONTINUE TO HEED ALL ROAD CLOSURES.
NEVER DRIVE AROUND BARRICADES OR CROSS WATER OF UNKNOWN DEPTH. AS
LITTLE AS 12 INCHES OF FLOWING WATER CAN CARRY A CAR AWAY.
LAT...LON 4003 7720 4015 7703 4016 7691 4020 7693
4023 7686 4028 7692 4032 7691 4094 7615
4091 7599 4073 7576 4064 7598 4057 7601
4049 7643 4028 7609 3972 7659 3972 7722
$$
FORECASTER: DANGELOThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 10:10 AM EDT | Special Weather Statement | CTP | Fulton | 35 min |
| Sep 18, 10:43 AM EDT | Special Weather Statement | CTP | Franklin | 32 min |
| Sep 18, 11:24 AM EDT | Special Weather Statement | CTP | Adams | 36 min |
| Sep 18, 11:32 AM EDT | Special Weather Statement | CTP | Juniata, Snyder | 28 min |
| Sep 18, 12:02 PM EDT | Special Weather Statement | CTP | Adams, York | 43 min |
| Sep 18, 12:07 PM EDT | Special Weather Statement | CTP | Columbia, Montour, Northumberland | 23 min |
| Sep 18, 12:32 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Lancaster, York | 43 min |
| Sep 18, 12:46 PM EDT | Special Weather Statement | CTP | Columbia, Montour, Northumberland | 29 min |
| Sep 18, 12:52 PM EDT | Areal Flood Advisory | CTP | Adams, Columbia, Cumberland, Dauphin, Lancaster, Lebanon and 5 more | 3 hr |
| Sep 18, 1:16 PM EDT | Severe Thunderstorm Warning | CTP | Adams, York | 59 min |
| Sep 18, 1:22 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, Lebanon, Schuylkill | 53 min |
| Sep 18, 2:13 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Cumberland, Dauphin, Lancaster, Lebanon, Schuylkill and 1 more | 62 min |
| Sep 18, 3:11 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 79 min |
| Sep 18, 3:18 PM EDT | Special Weather Statement | CTP | Schuylkill | 57 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.