Alert archive / Pennsylvania / Flash Flood Warnings in 2011
Flash Flood Warning 55, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 10, 2011, 9:02 AM EDT for Cambria County, Clearfield County, Pennsylvania. It was in force for 4 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 10, 2011, 9:02 AM EDT (13:02 UTC)
- Expired
- Sep 10, 2011, 1:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cambria County, PA, Clearfield County, PA
The radar
The State College radar (KCCX), 63 km from the middle of the area, began a volume at 13:04 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 10, 9:30 AM EDT | FLASH FLOOD | Northern Cambria, PA | NUMEROUS ROADS WITH WATER ON THEM |
| Sep 10, 9:45 AM EDT | FLASH FLOOD | Mahaffey, PA | BRIDGE WASHED OUT ON HANCHAR LANE BELL TWP NEAR RTE 219 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 1.0 hours before the alert went out and 123 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
- 102 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 552 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -41 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
286
WGUS51 KCTP 101302
FFWCTP
PAC021-033-101700-
/O.NEW.KCTP.FF.W.0055.110910T1302Z-110910T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
902 AM EDT SAT SEP 10 2011
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN CAMBRIA COUNTY...
SOUTHWESTERN CLEARFIELD COUNTY...
* UNTIL 100 PM EDT...
* AT 853 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
FLOODING FROM A THUNDERSTORM OVER NORTHERN CAMBRIA AND SOUTHWESTERN
CLEARFIELD COUNTIES. FLOODING WAS REPORTED ALONG ROUTE 219 NEAR
MAHAFFEY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MAHAFFEY...NORTHERN CAMBRIA...AND IRVONA.
RAIN GAGE REPORTS IN THE AREA INDICATE THAT UP TO AN INCH AND A HALF
INCHES OF RAIN HAS FALLEN IN THE LAST HOUR.
ADDITIONAL RAINFALL AMOUNTS OF MORE THAN AN INCH ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. IN HILLY TERRAIN
THERE ARE HUNDREDS OF SMALL STREAMS WHICH ARE POTENTIALLY DANGEROUS
IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS OR
BRIDGES. FIND ALTERNATE ROUTES OVER HIGHER GROUND. IT TAKES ONLY A
FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
&&
LAT...LON 4072 7881 4103 7881 4084 7841 4058 7855
4055 7889
$$
FORECASTER: DANGELO3 follow-up statements
080
WGUS51 KCTP 101306 CCA
FFWCTP
PAC021-033-101700-
/O.COR.KCTP.FF.W.0055.110910T1302Z-110910T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
902 AM EDT SAT SEP 10 2011
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHERN CAMBRIA COUNTY...
SOUTHWESTERN CLEARFIELD COUNTY...
* UNTIL 100 PM EDT...
* AT 853 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH
FLOODING FROM A THUNDERSTORM OVER NORTHERN CAMBRIA AND SOUTHWESTERN
CLEARFIELD COUNTIES. FLOODING WAS REPORTED ALONG ROUTE 219 NEAR
MAHAFFEY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MAHAFFEY...NORTHERN CAMBRIA...AND IRVONA.
RAIN GAGE REPORTS IN THE AREA INDICATE THAT UP TO AN INCH AND A HALF
OF RAIN HAS FALLEN IN THE LAST HOUR.
ADDITIONAL RAINFALL AMOUNTS OF MORE THAN AN INCH ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. IN HILLY TERRAIN
THERE ARE HUNDREDS OF SMALL STREAMS WHICH ARE POTENTIALLY DANGEROUS
IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS FLOODED ROADS OR
BRIDGES. FIND ALTERNATE ROUTES OVER HIGHER GROUND. IT TAKES ONLY A
FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
&&
LAT...LON 4072 7881 4103 7881 4084 7841 4058 7855
4055 7889
$$
FORECASTER: DANGELO149
WGUS71 KCTP 101431
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1031 AM EDT SAT SEP 10 2011
PAC021-033-101700-
/O.CON.KCTP.FF.W.0055.000000T0000Z-110910T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMBRIA PA-CLEARFIELD PA-
1031 AM EDT SAT SEP 10 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM EDT FOR
SOUTHWESTERN CLEARFIELD AND NORTHERN CAMBRIA COUNTIES...
AT 1020 AM EDT...DOPPLER RADAR CONTINUE TO INDICATE THAT VERY HEAVY
RAIN IS FALLING FROM A STATIONARY THUNDERSTORM OVER NORTHERN CAMBRIA
AND SOUTHWESTERN CLEARFIELD COUNTIES. THIS RAIN IS PRODUCING FLASH
FLOODING...ESPECIALLY ALONG THE WEST BRANCH OF THE SUSQUEHANNA RIVER
AND THE SMALL TRIBUTARIES OF THIS RIVER IN SOUTHWESTERN CLEARFIELD
COUNTY. UP TO 3 INCHES OF RAIN HAS FALLEN IN THAT AREA THIS MORNING.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MAHAFFEY...BURNSIDE...WESTOVER...NORTHERN CAMBRIA...CARROLLTOWN...
HASTINGS...PATTON AND PRINCE GALLITZIN STATE PARK.
ADDITIONAL RAINFALL AMOUNTS OF MORE THAN AN INCHARE POSSIBLE IN THE
WARNED AREA BEFORE NOON.
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. ROAD BEDS MAY BE WASHED OUT
AND BRIDGES DAMAGED OR UNSTABLE. WHEN ENCOUNTERING FLOODED ROADS
MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.
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 4072 7881 4103 7881 4084 7841 4058 7855
4055 7889
$$
FORECASTER: DANGELO621
WGUS71 KCTP 101656
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1256 PM EDT SAT SEP 10 2011
PAC021-033-101701-
/O.EXP.KCTP.FF.W.0055.000000T0000Z-110910T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMBRIA PA-CLEARFIELD PA-
1256 PM EDT SAT SEP 10 2011
...THE FLASH FLOOD WARNING FOR SOUTHWESTERN CLEARFIELD AND NORTHERN
CAMBRIA COUNTIES WILL BE ALLOWED TO EXPIRE...
THE EARLIER HEAVY RAINS HAVE ENDED...AND THERE ARE NO NEW REPORTS OF
FLOODING. THE WEST BRANCH AND STREAMS LEADING TO IT MAY STILL BE
RUNNING VERY HIGH...BUT THE THREAT FOR ADDITIONAL FLOODING IS LOW.
THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
PLEASE CONTINUE TO HEED ALL ROAD CLOSURES. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES...USUALLY FROM PEOPLE DRIVING INTO FLOODS.
ADDITIONAL SHOWERS AND THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND
EVENING. IF THESE ARE EXPECTED TO PRODUCE HEAVY RAIN AGAIN IN THIS
AREA...MORE STATEMENTS OR FLOOD WARNINGS MAY BE NECESSARY.
LAT...LON 4072 7881 4103 7881 4084 7841 4058 7855
4055 7889
$$
FORECASTER: DANGELOThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 9, 8:19 PM EDT | Flash Flood Warning | CTP | Blair, Cambria, Centre, Clearfield, Huntingdon, Juniata and 2 more | 3 hr |
| Sep 9, 8:31 PM EDT | Special Weather Statement | CTP | Juniata, Mifflin, Perry | 59 min |
| Sep 9, 9:32 PM EDT | Special Weather Statement | CTP | Juniata, Perry | 58 min |
| Sep 9, 10:08 PM EDT | Flash Flood Warning | CTP | Juniata, Mifflin, Perry, Snyder | 3 hr |
| Sep 9, 10:41 PM EDT | River Flood Warning | CTP | Blair, Huntingdon | 15 hr |
| Sep 9, 10:41 PM EDT | River Flood Warning | CTP | Blair, Huntingdon | 6 hr |
| Sep 9, 10:41 PM EDT | River Flood Warning | CTP | Perry | 15 hr |
| Sep 9, 11:09 PM EDT | Flash Flood Warning | CTP | Dauphin, Montour, Northumberland, Schuylkill, Snyder, Union | 4 hr |
| Sep 9, 11:42 PM EDT | Areal Flood Advisory | CTP | Elk | 78 min |
| Sep 10, 12:32 AM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Montour, Northumberland, Schuylkill | 5 hr |
| Sep 10, 12:57 AM EDT | Areal Flood Warning | CTP | Juniata, Mifflin, Perry, Snyder | 6 hr |
| Sep 10, 1:14 AM EDT | Special Weather Statement | CTP | Warren | 46 min |
| Sep 10, 4:01 AM EDT | Areal Flood Advisory | CTP | Elk, McKean, Warren | 3 hr |
| Sep 10, 6:51 AM EDT | Areal Flood Advisory | CTP | Cambria, Cameron, Clearfield, Elk, McKean, Warren | 3 hr |
| Sep 10, 4:40 PM EDT | Areal Flood Advisory | CTP | Adams, Cumberland, Franklin, Huntingdon, Juniata, Mifflin and 2 more | 3 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.