Alert archive / Pennsylvania / Flash Flood Warnings in 2024
Flash Flood Warning 41, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 6, 2024, 7:32 PM EDT for Berks County, Pennsylvania. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 6, 2024, 7:32 PM EDT (23:32 UTC)
- Expired
- Aug 6, 2024, 10:16 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), 129 km from the middle of the area, began a volume at 23:32 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 6, 9:45 PM EDT | RAIN 3.38 | 1 S West Wyomissing, PA | Mesonet station FW1703 Reading. |
| Aug 6, 9:48 PM EDT | RAIN 3.43 | 1 Ssw Spring Twp, PA | Mesonet station CW4113 Sinking Spring. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 11.5 hours before the alert went out and 210 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
- 527 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
434
WGUS51 KPHI 062332
FFWPHI
PAC011-070330-
/O.NEW.KPHI.FF.W.0041.240806T2332Z-240807T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
732 PM EDT Tue Aug 6 2024
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Eastern Berks County in eastern Pennsylvania...
* Until 1130 PM EDT.
* At 732 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 3 inches of rain have fallen. The expected rainfall rate
is 1 to 2 inches in 1 hour. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Reading, Wyomissing, Birdsboro, Kutztown, Fleetwood, Sinking
Spring, Laureldale, Wernersville, Topton, Elverson, Bally and
Bechtelsville.
This includes the following highways...
Interstate 176 in Pennsylvania between mile markers 1 and 11.
Pennsylvania Turnpike between mile markers 296 and 300.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4058 7573 4045 7553 4024 7570 4014 7587
4032 7615 4041 7598
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
MJL1 follow-up statement
932
WGUS71 KPHI 070216
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1016 PM EDT Tue Aug 6 2024
PAC011-070226-
/O.CAN.KPHI.FF.W.0041.000000T0000Z-240807T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
1016 PM EDT Tue Aug 6 2024
...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN BERKS COUNTY...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flood Watch remains in effect until 1200 PM EDT Wednesday for
portions of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4058 7573 4045 7553 4024 7570 4014 7587
4032 7615 4041 7598
$$
MJLThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 9:37 AM EDT | Heat Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 9 hr |
| Aug 6, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 37 min |
| Aug 6, 4:00 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 47 min |
| Aug 6, 4:32 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 8 hr |
| Aug 6, 4:37 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| Aug 6, 6:37 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Aug 6, 6:57 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 3 hr |
| Aug 6, 7:09 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Chester, Montgomery | 48 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2024Every flash flood warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.