Alert archive / Pennsylvania / Flash Flood Warnings in 2018
Flash Flood Warning 33, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 15, 2018, 10:06 AM EDT for Berks County, Pennsylvania. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 15, 2018, 10:06 AM EDT (14:06 UTC)
- Expired
- Jul 15, 2018, 12:00 PM EDT
- In force
- 114 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The State College radar (KCCX), 160 km from the middle of the area, began a volume at 14:06 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 2.1 hours before the alert went out and 194 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
- 25 J/kg
- Mixed-layer CIN
- -246 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
279
WGUS51 KPHI 151406
FFWPHI
PAC011-151800-
/O.NEW.KPHI.FF.W.0033.180715T1406Z-180715T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1006 AM EDT SUN JUL 15 2018
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
West central Berks County in eastern Pennsylvania...
* Until 200 PM EDT.
* At 1006 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to three inches of rain have
already fallen. Flash flooding is expected to begin shortly in the
areas of heaviest rain.
* Some locations that could experience flooding include...
Womelsdorf, Newmanstown, Bernville and Strausstown.
Additional rainfall amounts of one to two inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.
&&
LAT...LON 4054 7615 4046 7604 4031 7614 4036 7621
4037 7623 4047 7641 4048 7640
$$
PO1 follow-up statement
263
WGUS71 KPHI 151600
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1200 PM EDT SUN JUL 15 2018
PAC011-151610-
/O.CAN.KPHI.FF.W.0033.000000T0000Z-180715T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
1200 PM EDT SUN JUL 15 2018
...THE FLASH FLOOD WARNING FOR WEST CENTRAL BERKS COUNTY IS
CANCELLED...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any remaining road closures.
LAT...LON 4054 7615 4046 7604 4031 7614 4036 7621
4037 7623 4047 7641 4048 7640
$$
poThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:42 AM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Northampton | 4 hr |
| Jul 15, 9:44 AM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Jul 15, 9:47 AM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 4 hr |
| Jul 15, 10:57 AM EDT | Areal Flood Advisory | PHI | Berks, Chester, Montgomery | 2 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.