Alert archive / Pennsylvania / Flash Flood Warnings in 2011
Flash Flood Warning 57, NWS State College, PA
NWS State College, PA issued this flash flood warning at Sep 11, 2011, 7:51 PM EDT for York County, Pennsylvania. It was in force for 3 hr. 1 report 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
- Sep 11, 2011, 7:51 PM EDT (23:51 UTC)
- Expired
- Sep 11, 2011, 10:45 PM 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), 114 km from the middle of the area, began a volume at 23:53 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 |
|---|---|---|---|
| Sep 11, 7:54 PM EDT | FLASH FLOOD | 1 E East Berlin, PA | REPORT OF A VEHICLE STRANDED IN HIGH WATER IN PARADISE TWP NEAR EAST BERLIN. |
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, 11.9 hours before the alert went out and 114 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
- 485 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
044
WGUS51 KCTP 112351
FFWCTP
PAC133-120245-
/O.NEW.KCTP.FF.W.0057.110911T2351Z-110912T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
751 PM EDT SUN SEP 11 2011
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL YORK COUNTY...
* UNTIL 1045 PM EDT...
* AT 747 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM TRAINING SHOWERS AND THUNDERSTORMS OVER
WEST CENTRAL AND CENTRAL YORK COUNTY. RADAR ESTIMATES OF BETWEEN
ONE AND TWO INCHES ARE COMMON IN THIS AREA...AND ADDITIONAL
UPSTREAM RAINFALL COULD PRODUCE LOCAL TOTALS IN EXCESS OF 3
INCHES. THEREFORE FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SPRING
GROVE...THOMASVILLE AND YORK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3986 7695 3989 7699 3992 7697 3999 7701
3998 7674 3992 7670 3985 7673 3985 7696
3985 7697
$$
FORECASTER: DEVOIR1 follow-up statement
428
WGUS71 KCTP 120152
FFSCTP
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
952 PM EDT SUN SEP 11 2011
PAC133-120245-
/O.CON.KCTP.FF.W.0057.000000T0000Z-110912T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YORK PA-
952 PM EDT SUN SEP 11 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
CENTRAL YORK COUNTY...
AT 946 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SOME ROADS
REMAINED FLOODED FROM THUNDERSTORMS THAT HAVE SINCE EXITED THE AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PARADISE
TOWNSHIP.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3986 7695 3989 7699 3992 7697 3999 7701
3998 7674 3992 7670 3985 7673 3985 7696
3985 7697
$$
FORECASTER:The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 9:01 AM EDT | Areal Flood Advisory | CTP | Sullivan | 3 hr |
| Sep 11, 4:46 PM EDT | Special Weather Statement | CTP | Cumberland | 44 min |
| Sep 11, 4:54 PM EDT | Areal Flood Advisory | CTP | Adams | 3 hr |
| Sep 11, 5:04 PM EDT | Areal Flood Advisory | CTP | Cumberland | 3 hr |
| Sep 11, 5:29 PM EDT | Special Weather Statement | CTP | York | 31 min |
| Sep 11, 5:53 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 67 min |
| Sep 11, 6:18 PM EDT | Special Weather Statement | CTP | Centre | 42 min |
| Sep 11, 6:38 PM EDT | Special Weather Statement | CTP | Centre | 52 min |
| Sep 11, 6:50 PM EDT | Areal Flood Advisory | CTP | Adams, Cumberland, Dauphin, Franklin, York | 3 hr |
| Sep 11, 7:12 PM EDT | Special Weather Statement | CTP | York | 48 min |
| Sep 11, 7:13 PM EDT | Special Weather Statement | CTP | Franklin | 47 min |
| Sep 11, 7:16 PM EDT | Special Weather Statement | CTP | Adams | 44 min |
| Sep 11, 7:17 PM EDT | Special Weather Statement | CTP | Adams | 43 min |
| Sep 11, 7:31 PM EDT | Flash Flood Warning | CTP | Adams | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2011Every flash flood warning in 2011
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.