Alert archive / Pennsylvania / Flash Flood Warnings in 2012
Flash Flood Warning 10, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 1, 2012, 11:04 PM EDT for Berks County, Lehigh County, Montgomery County, Pennsylvania. It was in force for 4 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
- Jun 1, 2012, 11:04 PM EDT (03:04 UTC)
- Expired
- Jun 2, 2012, 3:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Berks County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 118 km from the middle of the area, began a volume at 03:06 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
Brookhaven, NY (KOKX), launched 00:00Z, 3.1 hours before the alert went out and 231 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 893 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
655
WGUS51 KPHI 020304
FFWPHI
PAC011-077-091-020700-
/O.NEW.KPHI.FF.W.0010.120602T0304Z-120602T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1104 PM EDT FRI JUN 1 2012
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
EAST CENTRAL BERKS COUNTY...
SOUTHERN LEHIGH COUNTY...
NORTHWESTERN MONTGOMERY COUNTY...
* UNTIL 300 AM EDT...
* AT 1057 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER EAST CENTRAL BERKS...
NORTHWESTERN MONTGOMERY AND SOUTHERN LEHIGH COUNTIES.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ALLENTOWN.
ADDITIONAL RAINFALL AMOUNTS OF ONE INCH ARE POSSIBLE IN THE WARNED
AREA AS THE NEXT BAND OF HEAVY RAIN MOVES IN FROM THE WEST. THE
WARNED AREA HAS RECEIVED SEVERAL INCHES OF RAINFALL THIS PAST WEEK
ONLY ADDING TO THE THREAT OF FLASH FLOODING TONIGHT.
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 4066 7573 4063 7539 4062 7538 4045 7547
4035 7549 4037 7577
$$
HEAVENER1 follow-up statement
692
WGUS71 KPHI 020558
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
158 AM EDT SAT JUN 2 2012
PAC011-077-091-020700-
/O.CON.KPHI.FF.W.0010.000000T0000Z-120602T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-LEHIGH PA-MONTGOMERY PA-
158 AM EDT SAT JUN 2 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 AM EDT FOR
NORTHWESTERN MONTGOMERY...SOUTHERN LEHIGH AND EAST CENTRAL BERKS
COUNTIES...
AT 150 AM EDT...DOPPLER RADAR INDICATED THAT THE HEAVY RAIN HAD
MOVED TO THE NORTHEAST AND EAST OF BERKS COUNTY...MONTGOMERY COUNTY
AND LEHIGH COUNTY. HOWEVER...SOME STREAMS AND CREEKS CONTINUED TO
RISE AS A RESULT OF THE RECENT HEAVY RAINFALL. SOME LOCATIONS
RECEIVED AN INCH OR TWO OF RAIN IN A BRIEF PERIOD OF TIME. THERE
WERE LOCALLY HIGHER AMOUNTS.
THE FLASH FLOOD WARNING WILL REMAIN IN EFFECT UNTIL 300 AM. BY THAT
TIME...STREAM AND CREEK LEVELS SHOULD BEGIN TO SUBSIDE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE THROUGH FLOOD WATERS. THE WATER MAY BE DEEPER THAN YOU
THINK IT IS.
PLEASE REPORT FLOODING...HAIL OR WIND DAMAGE BY CALLING YOUR LOCAL
LAW ENFORCEMENT OFFICIALS OR BY CALLING THE NATIONAL WEATHER SERVICE
TOLL FREE AT...1-877-633-6772.
&&
LAT...LON 4066 7573 4063 7539 4062 7538 4045 7547
4035 7549 4037 7577
$$
IOVINOThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 8:46 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 5 hr |
| Jun 1, 8:58 PM EDT | Special Weather Statement | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 62 min |
| Jun 1, 9:03 PM EDT | Tornado Warning | PHI | Bucks, Montgomery | 27 min |
| Jun 1, 10:01 PM EDT | Special Weather Statement | PHI | Berks | 89 min |
| Jun 2, 12:26 AM EDT | Areal Flood Advisory | PHI | Berks, Montgomery | 85 min |
| Jun 2, 1:12 AM EDT | Areal Flood Advisory | PHI | Monroe | 3 hr |
| Jun 2, 2:45 AM EDT | Areal Flood Warning | PHI | Montgomery | 6 hr |
| Jun 2, 11:28 AM EDT | Coastal Flood Advisory | PHI | Delaware, Philadelphia | 15 hr |
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.