Alert archive / Pennsylvania / Flash Flood Warnings in 2012

Flash Flood Warning 13, NWS State College, PA

July 31, 2012Cambria County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jul 31, 2012, 1:33 PM EDT for Cambria County, Pennsylvania. It was in force for 104 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 31, 2012, 1:33 PM EDT (17:33 UTC)
Expired: Jul 31, 2012, 3:17 PM EDT
In force: 104 min
Issued by: NWS State College, PA
Area: Storm-based polygon
Flood severity: None

County Cambria County, PA

The radar

The State College radar (KCCX), 87 km from the middle of the area, began a volume at 17:33 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.6 hours before the alert went out and 121 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: 666 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

934 
WGUS51 KCTP 311733
FFWCTP
PAC021-311930-
/O.NEW.KCTP.FF.W.0013.120731T1733Z-120731T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
133 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN CAMBRIA COUNTY...

* UNTIL 330 PM EDT...

* AT 128 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  VERY HEAVY RAIN FROM A SLOW MOVING THUNDERSTORM OVER SOUTHEAST     
  CAMBRIA COUNTY. RADAR ESTIMATES SHOW OVER 2 INCHES OF RAIN HAS     
  FALLEN IN THE LAST HOUR. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORTAGE.

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!

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4025 7888 4046 7883 4046 7855 4038 7856
      4036 7857 4035 7861 4029 7864 4028 7865
      4027 7865 4025 7866

$$

FORECASTER: STEINBUGL

1 follow-up statement

684 
WGUS71 KCTP 311917
FFSCTP

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
317 PM EDT TUE JUL 31 2012

PAC021-311925-
/O.CAN.KCTP.FF.W.0013.000000T0000Z-120731T1930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMBRIA PA-
317 PM EDT TUE JUL 31 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTHEASTERN 
CAMBRIA COUNTY...

HEAVY THUNDERSTORM RAINS AND THE THREAT OF FLASH FLOODING HAS ENDED 
ACROSS SOUTHEASTERN CAMBRIA COUNTY. THE ACCESS ROAD TO CRICHTON PARK 
NEAR PORTAGE WAS BRIEFLY CLOSED DUE TO HEAVY PONDING NEAR A LOCAL 
CREEK. 

LAT...LON 4025 7888 4046 7883 4046 7855 4038 7856
      4036 7857 4035 7861 4029 7864 4028 7865
      4027 7865 4025 7866

$$

FORECASTER: STEINBUGL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 7:27 AM EDT	Special Weather Statement	CTP	Bedford, Blair, Somerset	63 min
Jul 31, 11:57 AM EDT	Special Weather Statement	CTP	Cambria	48 min
Jul 31, 12:20 PM EDT	Special Weather Statement	CTP	Cameron, Elk	55 min
Jul 31, 12:36 PM EDT	Special Weather Statement	CTP	Somerset	54 min
Jul 31, 12:56 PM EDT	Areal Flood Advisory	CTP	Bedford, Blair, Cambria, Somerset	3 hr
Jul 31, 1:05 PM EDT	Severe Thunderstorm Warning	CTP	Somerset	42 min
Jul 31, 1:30 PM EDT	Special Weather Statement	CTP	Cambria	30 min
Jul 31, 1:40 PM EDT	Special Weather Statement	CTP	Cameron, McKean, Potter	35 min
Jul 31, 1:43 PM EDT	Special Weather Statement	CTP	Clearfield	32 min
Jul 31, 1:51 PM EDT	Special Weather Statement	CTP	Somerset	24 min
Jul 31, 2:13 PM EDT	Special Weather Statement	CTP	McKean, Potter	47 min
Jul 31, 2:15 PM EDT	Special Weather Statement	CTP	Clearfield	45 min
Jul 31, 2:20 PM EDT	Special Weather Statement	CTP	Cameron	25 min
Jul 31, 2:31 PM EDT	Areal Flood Advisory	CTP	Clearfield	119 min
Jul 31, 2:49 PM EDT	Special Weather Statement	CTP	Cumberland	26 min
Jul 31, 3:02 PM EDT	Special Weather Statement	CTP	Tioga	43 min
Jul 31, 3:05 PM EDT	Special Weather Statement	CTP	McKean	40 min
Jul 31, 3:21 PM EDT	Special Weather Statement	CTP	Centre	24 min
Jul 31, 3:26 PM EDT	Special Weather Statement	CTP	Clearfield	34 min
Jul 31, 3:29 PM EDT	Special Weather Statement	CTP	Somerset	46 min
Jul 31, 3:50 PM EDT	Special Weather Statement	CTP	Clinton	25 min
Jul 31, 3:54 PM EDT	Special Weather Statement	CTP	Centre	36 min
Jul 31, 3:59 PM EDT	Special Weather Statement	CTP	Tioga	31 min
Jul 31, 4:06 PM EDT	Areal Flood Advisory	CTP	Somerset	114 min
Jul 31, 4:11 PM EDT	Special Weather Statement	CTP	Somerset	34 min
Jul 31, 4:15 PM EDT	Special Weather Statement	CTP	Clearfield	30 min
Jul 31, 4:17 PM EDT	Special Weather Statement	CTP	Clinton	43 min
Jul 31, 4:24 PM EDT	Special Weather Statement	CTP	McKean	51 min
Jul 31, 4:28 PM EDT	Special Weather Statement	CTP	Mifflin	47 min
Jul 31, 4:41 PM EDT	Special Weather Statement	CTP	Somerset	34 min
Jul 31, 4:57 PM EDT	Special Weather Statement	CTP	McKean	48 min
Jul 31, 5:01 PM EDT	Special Weather Statement	CTP	Tioga	74 min
Jul 31, 5:09 PM EDT	Special Weather Statement	CTP	Snyder	51 min
Jul 31, 5:16 PM EDT	Areal Flood Advisory	CTP	McKean	119 min
Jul 31, 5:18 PM EDT	Special Weather Statement	CTP	Franklin, Huntingdon, Mifflin	42 min
Jul 31, 5:20 PM EDT	Severe Thunderstorm Warning	CTP	Blair, Huntingdon	40 min
Jul 31, 5:35 PM EDT	Special Weather Statement	CTP	McKean	25 min
Jul 31, 5:57 PM EDT	Special Weather Statement	CTP	Franklin, Huntingdon, Mifflin	33 min
Jul 31, 6:30 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Juniata, Mifflin, Perry	30 min
Jul 31, 6:50 PM EDT	Special Weather Statement	CTP	Warren	25 min
Jul 31, 6:52 PM EDT	Special Weather Statement	CTP	Potter	38 min
Jul 31, 7:00 PM EDT	Special Weather Statement	CTP	Adams, Cumberland, Dauphin, Juniata, Mifflin, Perry and 1 more	30 min
Jul 31, 7:11 PM EDT	Special Weather Statement	CTP	Elk	34 min
Jul 31, 7:18 PM EDT	Areal Flood Advisory	CTP	Adams, Cumberland, Dauphin, Perry, York	87 min
Jul 31, 7:33 PM EDT	Special Weather Statement	CTP	Dauphin, Perry, Snyder, York	27 min
Jul 31, 7:34 PM EDT	Special Weather Statement	CTP	Potter, Tioga	26 min
Jul 31, 7:41 PM EDT	Areal Flood Advisory	CTP	Cameron, Elk, McKean, Potter, Tioga	94 min
Jul 31, 7:42 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Dauphin, Lancaster, Lebanon, Perry, Schuylkill and 1 more	63 min
Jul 31, 7:56 PM EDT	Special Weather Statement	CTP	Cameron, Elk, Tioga	34 min

Nearby

Flash Flood Warnings in Pennsylvania, 2012 Every flash flood warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.