Alert archive / Pennsylvania / Flash Flood Warnings in 2011

Flash Flood Warning 61, NWS State College, PA

September 23, 2011Schuylkill County, Pennsylvania

NWS State College, PA issued this flash flood warning at Sep 23, 2011, 1:46 PM EDT for Schuylkill 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 23, 2011, 1:46 PM EDT (17:46 UTC)
Expired: Sep 23, 2011, 4:45 PM EDT
In force: 3 hr
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

County Schuylkill County, PA

The radar

The State College radar (KCCX), 160 km from the middle of the area, began a volume at 17:49 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 23, 1:55 PM EDT	FLASH FLOOD	Hometown, PA	SEVERAL ROADS REPORTED TO BE WASHED OUT IN RUSH TWP.

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, 5.8 hours before the alert went out and 221 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 709 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 443 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

923 
WGUS51 KCTP 231746
FFWCTP
PAC107-232045-
/O.NEW.KCTP.FF.W.0061.110923T1746Z-110923T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
146 PM EDT FRI SEP 23 2011

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SCHUYLKILL COUNTY...

* UNTIL 445 PM EDT...

* AT 141 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES   
AND RAIN GAGE REPORTS INDICATED VERY HEAVY RAIN FROM A CLUSTER OF 
SHOWERS AND THUNDERSTORMS OVER SCHUYLKILL COUNTY. SOME RAINFALL 
AMOUNTS OF 2 INCHES HAVE BEEN REPORTED.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ASHLAND...
  FRACKVILLE...MAHANOY CITY...MINERSVILLE...POTTSVILLE...SCHUYLKILL
  HAVEN...SHENANDOAH...ST. CLAIR AND TAMAQUA.

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!

&&

LAT...LON 4069 7584 4064 7598 4061 7600 4055 7611
      4049 7641 4049 7644 4052 7649 4067 7667
      4080 7631 4095 7620 4090 7597 4081 7588
      4074 7576

$$

FORECASTER: LA CORTE

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 23, 1:15 AM EDT	Dense Fog Advisory	CTP	Adams, Bedford, Blair, Cameron, Centre, Clearfield and 24 more	9 hr
Sep 23, 9:53 AM EDT	Flash Flood Watch	CTP	Adams, Columbia, Cumberland, Dauphin, Juniata, Lancaster and 10 more	16 hr
Sep 23, 11:39 AM EDT	Areal Flood Advisory	CTP	Adams, Columbia, Cumberland, Dauphin, Franklin, Lancaster and 5 more	6 hr
Sep 23, 11:46 AM EDT	Flash Flood Warning	CTP	Adams	6 hr
Sep 23, 1:52 PM EDT	Areal Flood Advisory	CTP	Columbia, Cumberland, Dauphin, Juniata, Montour, Northumberland and 4 more	6 hr
Sep 23, 2:42 PM EDT	Flash Flood Warning	CTP	Dauphin	3 hr
Sep 23, 4:04 PM EDT	Flash Flood Warning	CTP	Cumberland, York	5 hr
Sep 23, 5:35 PM EDT	Areal Flood Warning	CTP	Adams	6 hr
Sep 23, 6:16 PM EDT	Flash Flood Warning	CTP	Lancaster	3 hr
Sep 23, 6:48 PM EDT	River Flood Warning	CTP	Cumberland, York	7 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2011 Every 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.