Alert archive / Pennsylvania / Flash Flood Warnings in 2018
Flash Flood Warning 49, NWS State College, PA
NWS State College, PA issued this flash flood warning at Aug 31, 2018, 9:58 AM EDT for Lebanon County, Pennsylvania. It was in force for 3 hr. 3 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 31, 2018, 9:58 AM EDT (13:58 UTC)
- Expired
- Aug 31, 2018, 1:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County Lebanon County, PA
The radar
The State College radar (KCCX), 151 km from the middle of the area, began a volume at 14:01 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 31, 10:25 AM EDT | FLASH FLOOD | Jonestown, PA | FLOODING OF QUARRY RD BETWEEN SWATARA RD AND SWEETBRIAR LANE. |
| Aug 31, 10:40 AM EDT | FLASH FLOOD | Jonestown, PA | CARS SUBMERGED IN WATER. |
| Aug 31, 11:00 AM EDT | HEAVY RAIN 4.78 | Jonestown, PA | 2 HR RAINFALL TOTAL. |
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, 2.0 hours before the alert went out and 183 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
- 425 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 930 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
574
WGUS51 KCTP 311358
FFWCTP
PAC075-311700-
/O.NEW.KCTP.FF.W.0049.180831T1358Z-180831T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
958 AM EDT FRI AUG 31 2018
The National Weather Service in State College PA has issued a
* Flash Flood Warning for...
Central Lebanon County in south central Pennsylvania...
* Until 100 PM EDT.
* At 958 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that may experience flooding include...
Lebanon, Annville, Myerstown, Pleasant Hill, Sand Hill, Lebanon
South, Cleona, Avon, Richland, Fredericksburg, Schaefferstown,
Jonestown and Avon Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4030 7628 4034 7653 4050 7646 4050 7644
4038 7626 4037 7625
$$
CR1 follow-up statement
386
WGUS71 KCTP 311525
FFSCTP
Flash Flood Statement
National Weather Service State College PA
1125 AM EDT FRI AUG 31 2018
PAC075-311700-
/O.CON.KCTP.FF.W.0049.000000T0000Z-180831T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lebanon PA-
1125 AM EDT FRI AUG 31 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM EDT FOR
CENTRAL LEBANON COUNTY...
At 1123 AM EDT, the public reported flooding in the Jonestown area
and further flooding is expected until the rain diminishes. The
heaviest rain is currently located between Jonestown and
Fredericksburg.
Some locations that will experience flooding include... Lebanon,
Myerstown, Sand Hill, Avon, Richland, Fredericksburg, Jonestown and
Avon Heights.
This may include the following streams and drainages...Monroe
Creek... Brandywine Creek...Swatara Creek...Quittapahilla
Creek...Trib. to Tulpehocken Creek near Myerstown...Little Swatara
Creek...Sattazahn Run...Elizabeth Run...Earlakill Run...Trib. to
Little Swatara Creek near Freeport Mills...Deep Run...Oil Creek and
Tulpehocken Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4033 7627 4037 7652 4050 7646 4050 7644
4038 7626 4037 7625
$$
CRThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 6:29 AM EDT | Areal Flood Advisory | CTP | Blair | 3 hr |
| Aug 31, 6:47 AM EDT | Areal Flood Advisory | CTP | Centre, Huntingdon, Mifflin | 3 hr |
| Aug 31, 9:41 AM EDT | Areal Flood Advisory | CTP | Lebanon | 2 hr |
| Aug 31, 10:44 AM EDT | Areal Flood Advisory | CTP | Schuylkill | 2 hr |
| Aug 31, 12:11 PM EDT | Areal Flood Advisory | CTP | Lancaster, Lebanon | 3 hr |
| Aug 31, 1:02 PM EDT | Areal Flood Warning | CTP | Lebanon | 118 min |
| Aug 31, 1:31 PM EDT | Flash Flood Warning | CTP | Lancaster | 9 hr |
| Aug 31, 2:19 PM EDT | Areal Flood Advisory | CTP | York | 3 hr |
| Aug 31, 2:55 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Aug 31, 3:06 PM EDT | River Flood Warning | CTP | Lebanon, Schuylkill | 14 hr |
| Aug 31, 3:26 PM EDT | Areal Flood Advisory | CTP | Schuylkill | 3 hr |
| Aug 31, 3:35 PM EDT | Areal Flood Advisory | CTP | Lebanon | 115 min |
| Aug 31, 3:35 PM EDT | Areal Flood Advisory | CTP | Lancaster, York | 3 hr |
| Aug 31, 4:09 PM EDT | Areal Flood Advisory | CTP | Adams, Cumberland | 3 hr |
| Aug 31, 4:38 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 3 hr |
| Aug 31, 4:44 PM EDT | Flash Flood Warning | CTP | Adams, Cumberland | 3 hr |
| Aug 31, 5:08 PM EDT | Flash Flood Warning | CTP | York | 3 hr |
| Aug 31, 5:44 PM EDT | Areal Flood Advisory | CTP | Lancaster | 2 hr |
| Aug 31, 6:13 PM EDT | Areal Flood Advisory | CTP | Somerset | 2 hr |
| Aug 31, 7:35 PM EDT | Areal Flood Warning | CTP | Lancaster, York | 3 hr |
| Aug 31, 7:54 PM EDT | Areal Flood Warning | CTP | York | 3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.