Alert archive / Pennsylvania / Flash Flood Warnings in 2017
Flash Flood Warning 30, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 24, 2017, 6:47 PM EDT for Berks County, Pennsylvania. It was in force for 4 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
- Jul 24, 2017, 6:47 PM EDT (22:47 UTC)
- Expired
- Jul 24, 2017, 10:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Berks County, PA
The radar
The Philadelphia radar (KDIX), 160 km from the middle of the area, began a volume at 22:47 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 |
|---|---|---|---|
| Jul 24, 7:00 PM EDT | FLOOD | Bethel Twp, PA | SOME BASEMENT FLOODING. |
| Jul 24, 7:00 PM EDT | FLOOD | Tulpehocken Twp, PA | SEVERAL ROADS CLOSED DUE TO FLOODING. |
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, 10.8 hours before the alert went out and 205 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
- 57 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 1219 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- -82 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
483
WGUS51 KPHI 242247
FFWPHI
PAC011-250245-
/O.NEW.KPHI.FF.W.0030.170724T2247Z-170725T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
647 PM EDT MON JUL 24 2017
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northwestern Berks County in eastern Pennsylvania...
* Until 1045 PM EDT
* At 647 PM EDT...Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two 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...
Hamburg, Womelsdorf, Leesport, Shoemakersville, Bernville,
Strausstown, Fairview Hgts and Centerport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4052 7632 4052 7625 4058 7605 4057 7602
4060 7600 4062 7594 4044 7584 4036 7622
4049 7643
$$1 follow-up statement
049
WGUS71 KPHI 250240 RRA
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1040 PM EDT MON JUL 24 2017
PAC011-250250-
/O.EXP.KPHI.FF.W.0030.000000T0000Z-170725T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
1040 PM EDT MON JUL 24 2017
...THE FLASH FLOOD WARNING FOR NORTHWESTERN BERKS COUNTY WILL EXPIRE
AT 1045 PM EDT...
The heavy rain has ended. Flood waters have receded. Flooding is no
longer expected to pose a threat. Please continue to heed any
remaining road closures.
LAT...LON 4052 7632 4052 7625 4058 7605 4057 7602
4060 7600 4062 7594 4044 7584 4036 7622
4049 7643
$$
LFThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 1:33 AM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 5 hr |
| Jul 24, 2:34 AM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 41 min |
| Jul 24, 3:00 AM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 24, 3:17 AM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Monroe, Montgomery, Northampton | 118 min |
| Jul 24, 3:21 AM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 24, 3:36 AM EDT | Areal Flood Advisory | PHI | Monroe, Northampton | 6 hr |
| Jul 24, 3:47 AM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 118 min |
| Jul 24, 5:23 PM EDT | Special Weather Statement | PHI | Berks | 37 min |
| Jul 24, 5:31 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh | 59 min |
| Jul 24, 6:15 PM EDT | Special Weather Statement | PHI | Berks | 45 min |
| Jul 24, 6:30 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 60 min |
| Jul 24, 6:43 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh, Northampton | 4 hr |
| Jul 24, 7:07 PM EDT | Areal Flood Advisory | PHI | Northampton | 113 min |
| Jul 24, 7:07 PM EDT | Special Weather Statement | PHI | Berks | 23 min |
| Jul 24, 7:12 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Lehigh, Montgomery, Northampton | 2 hr |
| Jul 24, 7:16 PM EDT | Areal Flood Advisory | PHI | Berks, Montgomery | 119 min |
| Jul 24, 7:23 PM EDT | Flash Flood Warning | PHI | Bucks, Lehigh, Montgomery | 4 hr |
| Jul 24, 7:26 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Montgomery | 49 min |
| Jul 24, 7:42 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Montgomery | 2 hr |
| Jul 24, 7:48 PM EDT | Areal Flood Advisory | PHI | Bucks | 117 min |
| Jul 24, 7:50 PM EDT | Severe Thunderstorm Warning | PHI | Montgomery, Philadelphia | 25 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2017Every flash flood warning in 2017
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.