Alert archive / Pennsylvania / Flash Flood Warnings in 2022
Flash Flood Warning 5, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 2, 2022, 5:16 PM EDT for Chester County, Pennsylvania. It was in force for 4 hr. 6 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 2, 2022, 5:16 PM EDT (21:16 UTC)
- Expired
- Jul 2, 2022, 8:54 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Chester County, PA
The radar
The Dover AFB radar (KDOX), 115 km from the middle of the area, began a volume at 21:17 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 2, 6:00 PM EDT | FLASH FLOOD | 1 Wnw Nottingham, PA | FIRE DEPARTMENT REPORTS WATER RESCUE IN WEST NOTTINGHAM TWP. |
| Jul 2, 6:34 PM EDT | HEAVY RAIN 3.23 | 1 Ese Oxford, PA | WUNDERGROUND GAUGE KPAOXFOR48 STORM TOTAL IN JUST OVER TWO HOURS. |
| Jul 2, 6:44 PM EDT | HEAVY RAIN 4.04 | Oxford, PA | WUNDERGROUND GAUGE KPAOXFOR22 STORM TOTAL IN JUST LESS THAN TWO AND A HALF HOURS. |
| Jul 2, 6:54 PM EDT | HEAVY RAIN 3.99 | Nottingham, PA | WUNDERGROUND GAUGE KPANOTTI11 STORM TOTAL IN A LITTLE OVER TWO AND A HALF HOURS. |
| Jul 2, 6:55 PM EDT | HEAVY RAIN 4.22 | Nottingham, PA | TOTAL RAINFALL IN JUST OVER TWO AND A HALF HOURS. |
| Jul 2, 6:56 PM EDT | HEAVY RAIN 3.26 | 1 S Oxford, PA | WUNDERGROUND GAUGE KPAOXFOR39 STORM TOTAL IN ABOUT TWO AND A HALF HOURS. |
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, 9.3 hours before the alert went out and 146 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
- 499 J/kg
- Mixed-layer CIN
- -137 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
529
WGUS51 KPHI 022116
FFWPHI
PAC029-030115-
/O.NEW.KPHI.FF.W.0005.220702T2116Z-220703T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
516 PM EDT Sat Jul 2 2022
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southwestern Chester County in southeastern Pennsylvania...
* Until 915 PM EDT.
* At 516 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1 and 2 inches of rain have fallen. Additional rainfall amounts of
0.5 to 1.5 inches are possible in the warned area. 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...
Oxford, Mount Vernon, and Glen Roy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3973 7611 3973 7612 3974 7612 3974 7611
3975 7610 3974 7609 3975 7608 3976 7608
3976 7606 3977 7606 3981 7603 3981 7587
3977 7587 3973 7591 3972 7598 3972 7605
3973 7610 3973 7609 3974 7610
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Staarmann3 follow-up statements
143
WGUS71 KPHI 022156
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
556 PM EDT Sat Jul 2 2022
PAC029-030115-
/O.CON.KPHI.FF.W.0005.000000T0000Z-220703T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
556 PM EDT Sat Jul 2 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT THIS
EVENING FOR SOUTHWESTERN CHESTER COUNTY...
At 556 PM EDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
1.5 and 3 inches of rain have fallen. Additional rainfall amounts up
to 0.5 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar and automated gauges.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Oxford, Mount Vernon, and Glen Roy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3973 7611 3973 7612 3974 7612 3974 7611
3975 7610 3974 7609 3975 7608 3976 7608
3976 7606 3977 7606 3981 7603 3981 7587
3977 7587 3973 7591 3972 7598 3972 7605
3973 7610 3973 7609 3974 7610
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
Staarmann675
WGUS71 KPHI 022222
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
622 PM EDT Sat Jul 2 2022
PAC029-030115-
/O.CON.KPHI.FF.W.0005.000000T0000Z-220703T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
622 PM EDT Sat Jul 2 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT THIS
EVENING FOR SOUTHWESTERN CHESTER COUNTY...
At 622 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2 and 3 inches
of rain have fallen. Additional rainfall amounts up to 0.5 inches
are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
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...
Oxford, Mount Vernon, and Glen Roy.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
&&
LAT...LON 3973 7611 3973 7612 3974 7612 3974 7611
3975 7610 3974 7609 3975 7608 3976 7608
3976 7606 3977 7606 3981 7603 3981 7587
3977 7587 3973 7591 3972 7598 3972 7605
3973 7610 3973 7609 3974 7610
FLASH FLOOD...OBSERVED
$$
Staarmann910
WGUS71 KPHI 030054
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
854 PM EDT Sat Jul 2 2022
PAC029-030104-
/O.CAN.KPHI.FF.W.0005.000000T0000Z-220703T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chester PA-
854 PM EDT Sat Jul 2 2022
...FLASH FLOOD WARNING FOR SOUTHWESTERN CHESTER COUNTY HAS BEEN
REPLACED WITH A FLOOD WARNING...
LAT...LON 3973 7611 3973 7612 3974 7612 3974 7611
3975 7610 3974 7609 3975 7608 3976 7608
3976 7606 3977 7606 3981 7603 3981 7587
3977 7587 3973 7591 3972 7598 3972 7605
3973 7610 3973 7609 3974 7610
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 60 min |
| Jul 2, 4:48 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 24 min |
| Jul 2, 4:50 PM EDT | Areal Flood Advisory | PHI | Chester | 26 min |
| Jul 2, 5:19 PM EDT | Special Weather Statement | PHI | Chester | 56 min |
| Jul 2, 7:11 PM EDT | Special Weather Statement | PHI | Berks | 64 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2022Every flash flood warning in 2022
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.