Alert archive / Pennsylvania / Flash Flood Warnings in 2013
Flash Flood Warning 16, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 18, 2013, 5:18 PM EDT for Berks County, Lehigh County, Northampton 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 18, 2013, 5:18 PM EDT (21:18 UTC)
- Expired
- Jun 18, 2013, 9:15 PM 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, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 120 km from the middle of the area, began a volume at 21:18 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.3 hours before the alert went out and 143 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
- 811 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
292
WGUS51 KPHI 182118
FFWPHI
PAC011-077-095-190115-
/O.NEW.KPHI.FF.W.0016.130618T2118Z-130619T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
518 PM EDT TUE JUN 18 2013
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BERKS COUNTY...
LEHIGH COUNTY...
NORTHAMPTON COUNTY...
* UNTIL 915 PM EDT...
* AT 509 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SHOWERS AND THUNDERSTORMS JUST SOUTH OF BLUE MOUNTAIN.
OVER TWO INCHES OF RAIN HAS FALLEN IN A FEW LOCATIONS ALONG THIS
LINE...AND WITH MORE RAIN ON THE WAY...FLASH FLOODING IS EXPECTED
WHEREVER THE HEAVIST RAIN HAPPENS TO FALL. THIS LINE OF SHOWERS
AND THUNDERSTORMS...EXTENDING FROM THE WESTERN BORDER OF BERKS
COUNTY EAST TO THE DELAWARE RIVER...WAS MOVING VERY SLOWLY TO THE
SOUTH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
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 4058 7603 4065 7599 4078 7568 4086 7529
4093 7521 4096 7512 4091 7507 4087 7505
4085 7509 4080 7510 4075 7520 4069 7520
4068 7518 4061 7520 4043 7551 4044 7553
4034 7561 4013 7588 4049 7644
$$
FORECASTER: JJM1 follow-up statement
125
WGUS71 KPHI 190106
FFSPHI
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
906 PM EDT TUE JUN 18 2013
PAC011-077-095-190116-
/O.EXP.KPHI.FF.W.0016.000000T0000Z-130619T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-LEHIGH PA-NORTHAMPTON PA-
906 PM EDT TUE JUN 18 2013
...THE FLASH FLOOD WARNING WILL EXPIRE AT 915 PM EDT FOR
NORTHAMPTON...LEHIGH AND BERKS COUNTIES...
THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND NO LONGER
POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH FLOOD
WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 4058 7603 4065 7599 4078 7568 4086 7529
4093 7521 4096 7512 4091 7507 4087 7505
4085 7509 4080 7510 4075 7520 4069 7520
4068 7518 4061 7520 4043 7551 4044 7553
4034 7561 4013 7588 4049 7644
$$
NIERENBERGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 10:30 AM EDT | Special Weather Statement | PHI | Montgomery, Philadelphia | 60 min |
| Jun 18, 12:14 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Jun 18, 12:51 PM EDT | Flash Flood Warning | PHI | Chester, Montgomery | 3 hr |
| Jun 18, 1:32 PM EDT | Areal Flood Advisory | PHI | Philadelphia | 3 hr |
| Jun 18, 2:53 PM EDT | Areal Flood Warning | PHI | Chester | 3 hr |
| Jun 18, 4:52 PM EDT | Special Weather Statement | PHI | Northampton | 53 min |
| Jun 18, 5:56 PM EDT | Areal Flood Advisory | PHI | Bucks | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2013Every flash flood warning in 2013
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.