Alert archive / Pennsylvania / Flash Flood Warnings in 2018
Flash Flood Warning 4, NWS State College, PA
NWS State College, PA issued this flash flood warning at Jun 2, 2018, 12:47 AM EDT for York County, Pennsylvania. It was in force for 3 hr. 4 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
- Jun 2, 2018, 12:47 AM EDT (04:47 UTC)
- Expired
- Jun 2, 2018, 3:45 AM EDT
- In force
- 3 hr
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Flood severity
- None
County York County, PA
The radar
The Sterling radar (KLWX), 127 km from the middle of the area, began a volume at 04:47 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 |
|---|---|---|---|
| Jun 2, 12:52 AM EDT | FLASH FLOOD | 1 Sw Weigelstown, PA | WATER OVER DAVIDSBURG ROAD BETWEEN ADMIRE AND JAYNE LANE ROAD. |
| Jun 2, 12:53 AM EDT | FLASH FLOOD | 1 Wnw Weigelstown, PA | FLOODING ON FREYESVILLE ROAD BETWEEN ARNOLD LANE AND VALLEY ACRES ROAD. |
| Jun 2, 12:54 AM EDT | FLASH FLOOD | 1 Sw Poplars, PA | FLOODING ALONG ROUTE 74 NEAR INTERSECTION WITH EMIG MILL ROAD. |
| Jun 2, 1:56 AM EDT | FLASH FLOOD | 1 Ese Sylvan Hills, PA | FLOODING ON EAST PROSPECT ROAD AND WITMER ROAD. |
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 00:00Z, 4.8 hours before the alert went out and 126 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
- 678 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1436 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 45 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted.
379
WGUS51 KCTP 020447
FFWCTP
PAC133-020745-
/O.NEW.KCTP.FF.W.0004.180602T0447Z-180602T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service State College PA
1247 AM EDT SAT JUN 2 2018
The National Weather Service in State College PA has issued a
* Flash Flood Warning for...
Central York County in south central Pennsylvania...
* Until 345 AM EDT.
* At 1246 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is expected to
begin shortly.
* Some locations that will experience the most significant flooding include...
Dover, Weigelstown, Windsor and Wellsville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3992 7697 3994 7697 4001 7702 4002 7706
4008 7704 4004 7653 3995 7648 3991 7639
3989 7638 3987 7638 3985 7636
$$
KF1 follow-up statement
652
WGUS71 KCTP 020553
FFSCTP
Flash Flood Statement
National Weather Service State College PA
153 AM EDT SAT JUN 2 2018
PAC133-020745-
/O.CON.KCTP.FF.W.0004.000000T0000Z-180602T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
York PA-
153 AM EDT SAT JUN 2 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 AM EDT FOR
CENTRAL YORK COUNTY...
At 147 AM EDT, Doppler radar indicated thunderstorms had diminished
over York County. However, lighter rain will continue to fall
through at least 3 am and runoff from earlier thunderstorms is
causing flooding of some roads.
Some locations that will experience the most significant flooding include...
Dover, Weigelstown, Wellsville, Brogue, Stony Brook and East
Prospect.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3992 7697 3994 7697 4001 7702 4002 7706
4008 7704 4004 7653 3995 7648 3991 7639
3989 7638 3987 7638 3985 7636
$$
KFThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 9:39 PM EDT | Areal Flood Advisory | CTP | Adams | 111 min |
| Jun 1, 10:40 PM EDT | Flash Flood Watch | CTP | Adams, Lancaster, York | 7 hr |
| Jun 1, 11:38 PM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jun 1, 11:53 PM EDT | Areal Flood Advisory | CTP | York | 3 hr |
| Jun 2, 1:02 AM EDT | Areal Flood Advisory | CTP | Lancaster | 3 hr |
| Jun 2, 2:29 AM EDT | Flash Flood Warning | CTP | Lancaster | 3 hr |
| Jun 2, 5:40 AM EDT | Flash Flood Watch | CTP | Adams, Bedford, Franklin, Fulton, Lancaster, Somerset and 1 more | 22 hr |
| Jun 2, 3:44 PM EDT | Areal Flood Advisory | CTP | Bedford, Somerset | 2 hr |
| Jun 2, 5:38 PM EDT | Areal Flood Advisory | CTP | Lancaster, York | 112 min |
| Jun 2, 6:07 PM EDT | Special Weather Statement | CTP | York | 38 min |
| Jun 2, 7:10 PM EDT | Areal Flood Advisory | CTP | York | 4 hr |
| Jun 2, 7:12 PM EDT | Special Weather Statement | CTP | York | 33 min |
| Jun 2, 7:39 PM EDT | Flash Flood Warning | CTP | Lancaster, York | 6 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.