Alert archive / Pennsylvania / Flash Flood Warnings in 2011
Flash Flood Warning 61, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 11, 2011, 8:19 PM EDT for Berks County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 11, 2011, 8:19 PM EDT (00:19 UTC)
- Expired
- Sep 11, 2011, 10:57 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 149 km from the middle of the area, began a volume at 00:19 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.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 0.3 hours before the alert went out and 208 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
- 420 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 1369 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
812
WGUS51 KPHI 120019
FFWPHI
PAC011-120415-
/O.NEW.KPHI.FF.W.0061.110912T0019Z-110912T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
819 PM EDT SUN SEP 11 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL BERKS COUNTY...
* UNTIL 1215 AM EDT...
* AT 815 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS OVER CENTRAL BERKS COUNTY.
ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN WERE MOVING NORTHEASTWARD
FROM LANCASTER COUNTY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BERNVILLE...HAMBURG...LAURELDALE...LEESPORT...LENHARTSVILLE...
READING...SHOEMAKERSVILLE...SINKING SPRING...STRAUSSTOWN...
WERNERSVILLE...WYOMISSING AND NEW MORGAN.
ADDITIONAL RAINFALL AMOUNTS OF AN INCH OR TWO ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.
&&
LAT...LON 4054 7619 4057 7614 4058 7609 4060 7605
4059 7603 4064 7601 4068 7590 4067 7589
4062 7588 4017 7585 4016 7586 4014 7590
4033 7617
$$
IOVINO2 follow-up statements
024
WGUS71 KPHI 120144
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
944 PM EDT SUN SEP 11 2011
PAC011-120415-
/O.CON.KPHI.FF.W.0061.000000T0000Z-110912T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
944 PM EDT SUN SEP 11 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR
CENTRAL BERKS COUNTY...
AT 935 PM EDT...DOPPLER RADAR CONTINUES TO INDICATE SCATTERED
THUNDERSTORMS PRODUCING HEAVY RAIN OVER PARTS OF CENTRAL BERKS
COUNTY. RADAR ESTIMATES INDICATE THAT OVER TWO INCHES OF RAIN MAY
HAVE ALREADY FALLEN THIS EVENING IN THE VICINITY OF BLUE MARSH LAKE.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BERNVILLE...
HAMBURG...LAURELDALE...LEESPORT...LENHARTSVILLE...READING...
SHOEMAKERSVILLE...SINKING SPRING...STRAUSSTOWN...WERNERSVILLE...
WYOMISSING AND NEW MORGAN.
ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE
WARNED AREA.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU WILL BE DRIVING IN THE AREA, BE PREPARED FOR REDUCED
VISIBILITY DUE TO THE HEAVY RAIN. DO NOT DRIVE YOUR VEHICLE THROUGH
FLOOD WATERS. THE WATER MAY BE DEEPER THAN YOU THINK IT IS. YOU WILL
BE PUTTING YOURSELF IN DANGER AND YOU MAY DAMAGE YOUR VEHICLE.
PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL
LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE
TOLL FREE AT...1-877-633-6772.
&&
LAT...LON 4054 7619 4057 7614 4058 7609 4060 7605
4059 7603 4064 7601 4068 7590 4067 7589
4062 7588 4017 7585 4016 7586 4014 7590
4033 7617
$$
IOVINO008
WGUS71 KPHI 120257
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1057 PM EDT SUN SEP 11 2011
PAC011-120306-
/O.CAN.KPHI.FF.W.0061.000000T0000Z-110912T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
1057 PM EDT SUN SEP 11 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL BERKS
COUNTY...
THE WATER FROM THIS EVENING'S HEAVY RAINFALL IS RECEDING AND IT NO
LONGER POSES A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.
LOCATIONS IN THE WARNING INCLUDED BUT WERE NOT LIMITED TO READING.
LAT...LON 4054 7619 4057 7614 4058 7609 4060 7605
4059 7603 4064 7601 4068 7590 4067 7589
4062 7588 4017 7585 4016 7586 4014 7590
4033 7617
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 8:46 PM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Sep 11, 9:00 PM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Sep 11, 9:14 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Montgomery | 110 min |
| Sep 11, 9:14 PM EDT | Special Weather Statement | PHI | Berks, Chester, Lehigh, Montgomery | 61 min |
| Sep 11, 9:24 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Sep 11, 9:34 PM EDT | Special Weather Statement | PHI | Philadelphia | 41 min |
| Sep 11, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Montgomery | 51 min |
| Sep 11, 9:56 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 11, 10:25 PM EDT | Special Weather Statement | PHI | Philadelphia | 65 min |
| Sep 11, 10:29 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 46 min |
| Sep 11, 10:44 PM EDT | Areal Flood Advisory | PHI | Chester | 107 min |
| Sep 11, 10:52 PM EDT | Special Weather Statement | PHI | Bucks, Delaware, Montgomery, Philadelphia | 83 min |
| Sep 11, 11:10 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Philadelphia | 65 min |
| Sep 12, 11:05 AM EDT | Coastal Flood Statement | PHI | Delaware, Philadelphia | 6 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.