Alert archive / Pennsylvania / Flash Flood Warnings in 2018
Flash Flood Warning 81, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 31, 2018, 10:09 AM EDT for Berks County, Pennsylvania. It was in force for 7 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
- Aug 31, 2018, 10:09 AM EDT (14:09 UTC)
- Expired
- Aug 31, 2018, 5:15 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The State College radar (KCCX), 161 km from the middle of the area, began a volume at 14:13 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 12:00Z, 2.2 hours before the alert went out and 204 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
- 425 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
467
WGUS51 KPHI 311409
FFWPHI
PAC011-311715-
/O.NEW.KPHI.FF.W.0081.180831T1409Z-180831T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1009 AM EDT FRI AUG 31 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northwestern Berks County in eastern Pennsylvania...
* Until 115 PM EDT.
* At 1007 AM EDT, Doppler radar indicated heavy rain in Lebanon
County moving slowly northeast into northwestern Berks Couny. Over
two inches of rain is possible in a short period of time, which
will result in flash flooding in portions of the warned area.
* Some locations that could experience flooding include...
Hamburg, Womelsdorf, Shoemakersville, Bernville, Strausstown and
Centerport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
4058 7605 4057 7602 4059 7601 4051 7593
4034 7617 4049 7643
$$
jjm3 follow-up statements
828
WGUS71 KPHI 311621
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1221 PM EDT FRI AUG 31 2018
PAC011-311715-
/O.CON.KPHI.FF.W.0081.000000T0000Z-180831T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
1221 PM EDT FRI AUG 31 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM EDT FOR
NORTHWESTERN BERKS COUNTY...
At 1219 PM EDT, Doppler radar indicated heavy rain across portions
of the warned area, with radar-estimated rainfall totals up to 3
inches since earlier this morning in the far northwestern portions
of the county. The flash flood warning remains in effect.
Some locations that could experience flooding
include... Hamburg, Womelsdorf, Shoemakersville, Bernville,
Strausstown and Centerport.
LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
4058 7605 4057 7602 4059 7601 4051 7593
4034 7617 4049 7643
$$
jjm600
WGUS51 KPHI 311701
FFWPHI
PAC011-312115-
/O.EXT.KPHI.FF.W.0081.000000T0000Z-180831T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
101 PM EDT FRI AUG 31 2018
The National Weather Service in Mount Holly NJ has extended the
* Flash Flood Warning for...
Northwestern Berks County in eastern Pennsylvania...
* Until 515 PM EDT.
* At 1258 PM EDT, Doppler radar estimated over 2 inches of rain in
northwestern Berks County since this morning. An additional one to
three inches of rain is on the way. Flash flooding is expected.
* Some locations that could experience flooding include...
Hamburg, Womelsdorf, Shoemakersville, Bernville, Strausstown and
Centerport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
4058 7605 4057 7602 4059 7601 4051 7593
4034 7617 4049 7643
$$
jjm093
WGUS71 KPHI 312109
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
509 PM EDT FRI AUG 31 2018
PAC011-312117-
/O.EXP.KPHI.FF.W.0081.000000T0000Z-180831T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
509 PM EDT FRI AUG 31 2018
...THE FLASH FLOOD WARNING FOR NORTHWESTERN BERKS COUNTY WILL EXPIRE
AT 515 PM EDT...
The heavy rain has ended. Flash Flooding is no longer expected to
pose a threat, however, many local creeks and stream continue to run
high and the Schuylkill River continues to rise. An Areal Flood
Warning will be issued for any residual flooding. Please continue to
heed any remaining road closures.
LAT...LON 4052 7634 4052 7625 4054 7617 4056 7613
4058 7605 4057 7602 4059 7601 4051 7593
4034 7617 4049 7643
$$
RobertsonThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 6:52 AM EDT | Areal Flood Advisory | PHI | Philadelphia | 4 hr |
| Aug 31, 7:55 AM EDT | Areal Flood Advisory | PHI | Delaware | 3 hr |
| Aug 31, 10:14 AM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Aug 31, 1:22 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Aug 31, 1:54 PM EDT | Areal Flood Advisory | PHI | Berks, Chester, Lehigh, Montgomery | 4 hr |
| Aug 31, 3:59 PM EDT | Flash Flood Warning | PHI | Berks, Chester | 4 hr |
| Aug 31, 5:13 PM EDT | Areal Flood Warning | PHI | Berks | 7 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2018Every flash flood warning in 2018
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.