Alert archive / Pennsylvania / Flash Flood Warnings in 2017
Flash Flood Warning 13, NWS State College, PA
NWS State College, PA issued this flash flood warning at Jul 23, 2017, 6:36 PM EDT for Dauphin County, Lebanon County, Pennsylvania. It was in force for 3 hr. 7 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 23, 2017, 6:36 PM EDT (22:36 UTC)
- Expired
- Jul 23, 2017, 9:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Dauphin County, PA, Lebanon County, PA
The radar
The State College radar (KCCX), 139 km from the middle of the area, began a volume at 22:39 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 23, 6:50 PM EDT | FLASH FLOOD | Clifton, PA | FLOODED CARS AND STREET FLOODING ON MIDDLETOWN ROAD |
| Jul 23, 7:03 PM EDT | FLASH FLOOD | Middletown, PA | WIDESPREAD ROAD FLOODING AND CARS FLOODED |
| Jul 23, 7:06 PM EDT | FLASH FLOOD | Oakmont, PA | WALTONVILLE ROAD IMPASSABLE DUE TO FLOODING |
| Jul 23, 7:14 PM EDT | FLASH FLOOD | 1 Nnw Highspire, PA | PERSONS TRAPPED IN HOME DUE TO FLOODING |
| Jul 23, 7:20 PM EDT | FLASH FLOOD | Greenwood Hills, PA | LUMBER STREET IMPASSABLE DUE TO FLOODING |
| Jul 23, 7:25 PM EDT | FLASH FLOOD | Lebanon, PA | WIDESPREAD ROADS FLOODED AND IMPASSABLE COUNTYWIDE |
| Jul 23, 7:36 PM EDT | FLASH FLOOD | 1 Nnw Royalton, PA | ENTRAPMENT RESCUE DUE TO FLOODING AT 149 WILSON STREET |
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, 10.6 hours before the alert went out and 154 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
- 186 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 983 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
382
WGUS51 KCTP 232236
FFWCTP
PAC043-075-240130-
/O.NEW.KCTP.FF.W.0013.170723T2236Z-170724T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
636 PM EDT SUN JUL 23 2017
The National Weather Service in State College PA has issued a
* Flash Flood Warning for...
Southeastern Dauphin County in south central Pennsylvania...
Lebanon County in south central Pennsylvania...
* Until 930 PM EDT.
* At 634 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain over southern Dauphion County and Central Lebanon
County. The storms are nearly stationary. Minor flooding is
occurring in southern Dauphin County, and should become worse. The
rain in Lebanon County is falling over very wet ground. Flash
flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Myerstown, Hummelstown, Palmyra, Annville, Middletown, Steelton,
Hershey, Lebanon, Cornwall and Colonial Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
&&
LAT...LON 4020 7657 4017 7664 4017 7666 4015 7668
4015 7670 4012 7672 4013 7674 4018 7676
4020 7680 4020 7682 4025 7688 4049 7643
4036 7622
$$
Dangelo1 follow-up statement
222
WGUS71 KCTP 232357
FFSCTP
Flash Flood Statement
National Weather Service State College PA
757 PM EDT SUN JUL 23 2017
PAC043-075-240130-
/O.CON.KCTP.FF.W.0013.000000T0000Z-170724T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dauphin PA-Lebanon PA-
757 PM EDT SUN JUL 23 2017
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
SOUTHEASTERN DAUPHIN AND LEBANON COUNTIES...
At 751 PM EDT, local law enforcement reported widespread flash
flooding around all of southern Dauphin County, specifically in
Middletown. The heavy rain has tapered off and it should be dry over
the next few hours. Expect the current flooding to get briefly
worse, but the water should begin to recede later this evening.
However, additional heavy rain may develop later tonight.
Some locations that will experience flooding include...
Myerstown, Hummelstown, Palmyra, Annville, Middletown, Steelton,
Hershey, Lebanon, Cornwall and Colonial Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.
&&
LAT...LON 4020 7657 4017 7664 4017 7666 4015 7668
4015 7670 4012 7672 4013 7674 4018 7676
4020 7680 4020 7682 4025 7688 4049 7643
4036 7622
$$
DangeloThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 8:54 PM EDT | Areal Flood Advisory | CTP | Somerset | 3 hr |
| Jul 23, 2:27 PM EDT | Flash Flood Watch | CTP | Adams, Cameron, Clinton, Columbia, Cumberland, Dauphin and 17 more | 18 hr |
| Jul 23, 2:47 PM EDT | Special Weather Statement | CTP | Lancaster | 13 min |
| Jul 23, 2:52 PM EDT | Special Weather Statement | CTP | Tioga | 38 min |
| Jul 23, 3:22 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 38 min |
| Jul 23, 3:29 PM EDT | Special Weather Statement | CTP | Tioga | 46 min |
| Jul 23, 3:40 PM EDT | Severe Thunderstorm Warning | CTP | Potter, Tioga | 80 min |
| Jul 23, 3:57 PM EDT | Special Weather Statement | CTP | Tioga | 33 min |
| Jul 23, 4:06 PM EDT | Areal Flood Advisory | CTP | York | 3 hr |
| Jul 23, 4:35 PM EDT | Areal Flood Advisory | CTP | Franklin | 3 hr |
| Jul 23, 4:50 PM EDT | Flash Flood Warning | CTP | York | 4 hr |
| Jul 23, 4:55 PM EDT | Areal Flood Advisory | CTP | Adams, York | 3 hr |
| Jul 23, 5:00 PM EDT | Special Weather Statement | CTP | Tioga | 30 min |
| Jul 23, 5:07 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 53 min |
| Jul 23, 5:17 PM EDT | Special Weather Statement | CTP | Lebanon | 28 min |
| Jul 23, 5:34 PM EDT | Special Weather Statement | CTP | Cumberland | 26 min |
| Jul 23, 5:36 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Lancaster, York | 54 min |
| Jul 23, 6:00 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Montour, Northumberland | 60 min |
| Jul 23, 6:05 PM EDT | Areal Flood Advisory | CTP | Cumberland, Dauphin, Lancaster, York | 3 hr |
| Jul 23, 6:59 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Lycoming, Montour, Northumberland | 61 min |
| Jul 23, 7:08 PM EDT | Special Weather Statement | CTP | Dauphin | 37 min |
| Jul 23, 7:32 PM EDT | Areal Flood Advisory | CTP | Dauphin, Northumberland | 3 hr |
| Jul 23, 7:59 PM EDT | Flash Flood Warning | CTP | Dauphin, Northumberland | 3 hr |
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.